tsm1

package
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Published: Sep 5, 2017 License: MIT Imports: 37 Imported by: 0

Documentation

Overview

Package tsm1 provides a TSDB in the Time Structured Merge tree format.

Index

Constants

View Source
const (
	// CompactionTempExtension is the extension used for temporary files created during compaction.
	CompactionTempExtension = "tmp"

	// TSMFileExtension is the extension used for TSM files.
	TSMFileExtension = "tsm"
)
View Source
const (
	// BlockFloat64 designates a block encodes float64 values.
	BlockFloat64 = byte(0)

	// BlockInteger designates a block encodes int64 values.
	BlockInteger = byte(1)

	// BlockBoolean designates a block encodes boolean values.
	BlockBoolean = byte(2)

	// BlockString designates a block encodes string values.
	BlockString = byte(3)

	// BlockUnsigned designates a block encodes uint64 values.
	BlockUnsigned = byte(4)
)
View Source
const (
	// DefaultSegmentSize of 10MB is the size at which segment files will be rolled over.
	DefaultSegmentSize = 10 * 1024 * 1024

	// WALFileExtension is the file extension we expect for wal segments.
	WALFileExtension = "wal"

	// WALFilePrefix is the prefix on all wal segment files.
	WALFilePrefix = "_"
)
View Source
const (
	// MagicNumber is written as the first 4 bytes of a data file to
	// identify the file as a tsm1 formatted file
	MagicNumber uint32 = 0x16D116D1

	// Version indicates the version of the TSM file format.
	Version byte = 1
)

Variables

View Source
var (
	// ErrWALClosed is returned when attempting to write to a closed WAL file.
	ErrWALClosed = fmt.Errorf("WAL closed")

	// ErrWALCorrupt is returned when reading a corrupt WAL entry.
	ErrWALCorrupt = fmt.Errorf("corrupted WAL entry")
)
View Source
var (
	//ErrNoValues is returned when TSMWriter.WriteIndex is called and there are no values to write.
	ErrNoValues = fmt.Errorf("no values written")

	// ErrTSMClosed is returned when performing an operation against a closed TSM file.
	ErrTSMClosed = fmt.Errorf("tsm file closed")

	// ErrMaxKeyLengthExceeded is returned when attempting to write a key that is too long.
	ErrMaxKeyLengthExceeded = fmt.Errorf("max key length exceeded")

	// ErrMaxBlocksExceeded is returned when attempting to write a block past the allowed number.
	ErrMaxBlocksExceeded = fmt.Errorf("max blocks exceeded")
)
View Source
var ErrFileInUse = fmt.Errorf("file still in use")

ErrFileInUse is returned when attempting to remove or close a TSM file that is still being used.

View Source
var (
	// ErrSnapshotInProgress is returned if a snapshot is attempted while one is already running.
	ErrSnapshotInProgress = fmt.Errorf("snapshot in progress")
)

Functions

func BlockCount

func BlockCount(block []byte) int

BlockCount returns the number of timestamps encoded in block.

func BlockType

func BlockType(block []byte) (byte, error)

BlockType returns the type of value encoded in a block or an error if the block type is unknown.

func CountTimestamps

func CountTimestamps(b []byte) int

func ErrCacheMemorySizeLimitExceeded

func ErrCacheMemorySizeLimitExceeded(n, limit uint64) error

ErrCacheMemorySizeLimitExceeded returns an error indicating an operation could not be completed due to exceeding the cache-max-memory-size setting.

func NewEngine

func NewEngine(id uint64, idx tsdb.Index, database, path string, walPath string, opt tsdb.EngineOptions) tsdb.Engine

NewEngine returns a new instance of Engine.

func NewIndirectIndex

func NewIndirectIndex() *indirectIndex

NewIndirectIndex returns a new indirect index.

func ParseTSMFileName

func ParseTSMFileName(name string) (int, int, error)

ParseTSMFileName parses the generation and sequence from a TSM file name.

func SeriesAndFieldFromCompositeKey

func SeriesAndFieldFromCompositeKey(key []byte) ([]byte, []byte)

SeriesAndFieldFromCompositeKey returns the series key and the field key extracted from the composite key.

func SeriesFieldKey

func SeriesFieldKey(seriesKey, field string) string

SeriesFieldKey combine a series key and field name for a unique string to be hashed to a numeric ID.

func SeriesFieldKeyBytes

func SeriesFieldKeyBytes(seriesKey, field string) []byte

func ZigZagDecode

func ZigZagDecode(v uint64) int64

ZigZagDecode converts a previously zigzag encoded uint64 back to a int64.

func ZigZagEncode

func ZigZagEncode(x int64) uint64

ZigZagEncode converts a int64 to a uint64 by zig zagging negative and positive values across even and odd numbers. Eg. [0,-1,1,-2] becomes [0, 1, 2, 3].

Types

type BitReader

type BitReader struct {
	// contains filtered or unexported fields
}

BitReader reads bits from an io.Reader.

func NewBitReader

func NewBitReader(data []byte) *BitReader

NewBitReader returns a new instance of BitReader that reads from data.

func (*BitReader) CanReadBitFast

func (r *BitReader) CanReadBitFast() bool

CanReadBitFast returns true if calling ReadBitFast() is allowed. Fast bit reads are allowed when at least 2 values are in the buffer. This is because it is not required to refilled the buffer and the caller can inline the calls.

func (*BitReader) ReadBit

func (r *BitReader) ReadBit() (bool, error)

ReadBit returns the next bit from the underlying data.

func (*BitReader) ReadBitFast

func (r *BitReader) ReadBitFast() bool

ReadBitFast is an optimized bit read. IMPORTANT: Only allowed if CanReadFastBit() is true!

func (*BitReader) ReadBits

func (r *BitReader) ReadBits(nbits uint) (uint64, error)

ReadBits reads nbits from the underlying data into a uint64. nbits must be from 1 to 64, inclusive.

func (*BitReader) Reset

func (r *BitReader) Reset(data []byte)

Reset sets the underlying reader on b and reinitializes.

type BlockIterator

type BlockIterator struct {
	// contains filtered or unexported fields
}

BlockIterator allows iterating over each block in a TSM file in order. It provides raw access to the block bytes without decoding them.

func (*BlockIterator) Next

func (b *BlockIterator) Next() bool

Next returns true if there are more blocks to iterate through.

func (*BlockIterator) PeekNext

func (b *BlockIterator) PeekNext() []byte

PeekNext returns the next key to be iterated or an empty string.

func (*BlockIterator) Read

func (b *BlockIterator) Read() (key []byte, minTime int64, maxTime int64, typ byte, checksum uint32, buf []byte, err error)

Read reads information about the next block to be iterated.

type BooleanDecoder

type BooleanDecoder struct {
	// contains filtered or unexported fields
}

BooleanDecoder decodes a series of booleans from an in-memory buffer.

func (*BooleanDecoder) Error

func (e *BooleanDecoder) Error() error

Error returns the error encountered during decoding, if one occurred.

func (*BooleanDecoder) Next

func (e *BooleanDecoder) Next() bool

Next returns whether there are any bits remaining in the decoder. It returns false if there was an error decoding. The error is available on the Error method.

func (*BooleanDecoder) Read

func (e *BooleanDecoder) Read() bool

Read returns the next bit from the decoder.

func (*BooleanDecoder) SetBytes

func (e *BooleanDecoder) SetBytes(b []byte)

SetBytes initializes the decoder with a new set of bytes to read from. This must be called before calling any other methods.

type BooleanEncoder

type BooleanEncoder struct {
	// contains filtered or unexported fields
}

BooleanEncoder encodes a series of booleans to an in-memory buffer.

func NewBooleanEncoder

func NewBooleanEncoder(sz int) BooleanEncoder

NewBooleanEncoder returns a new instance of BooleanEncoder.

func (*BooleanEncoder) Bytes

func (e *BooleanEncoder) Bytes() ([]byte, error)

Bytes returns a new byte slice containing the encoded booleans from previous calls to Write.

func (*BooleanEncoder) Flush

func (e *BooleanEncoder) Flush()

Flush is no-op

func (*BooleanEncoder) Reset

func (e *BooleanEncoder) Reset()

Reset sets the encoder to its initial state.

func (*BooleanEncoder) Write

func (e *BooleanEncoder) Write(b bool)

Write encodes b to the underlying buffer.

type BooleanValue

type BooleanValue struct {
	// contains filtered or unexported fields
}

BooleanValue represents a boolean value.

func DecodeBooleanBlock

func DecodeBooleanBlock(block []byte, a *[]BooleanValue) ([]BooleanValue, error)

DecodeBooleanBlock decodes the boolean block from the byte slice and appends the boolean values to a.

func (BooleanValue) Size

func (v BooleanValue) Size() int

Size returns the number of bytes necessary to represent the value and its timestamp.

func (BooleanValue) String

func (v BooleanValue) String() string

String returns the string representation of the value and its timestamp.

func (BooleanValue) UnixNano

func (v BooleanValue) UnixNano() int64

UnixNano returns the timestamp of the value in nanoseconds since unix epoch.

func (BooleanValue) Value

func (v BooleanValue) Value() interface{}

Value returns the underlying boolean value.

type BooleanValues

type BooleanValues []BooleanValue

BooleanValues represents a slice of Boolean values.

func (BooleanValues) Deduplicate

func (a BooleanValues) Deduplicate() BooleanValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (BooleanValues) Encode

func (a BooleanValues) Encode(buf []byte) ([]byte, error)

func (BooleanValues) Exclude

func (a BooleanValues) Exclude(min, max int64) BooleanValues

Exclude returns the subset of values not in [min, max]

func (BooleanValues) Include

func (a BooleanValues) Include(min, max int64) BooleanValues

Include returns the subset values between min and max inclusive.

func (BooleanValues) Len

func (a BooleanValues) Len() int

Sort methods

func (BooleanValues) Less

func (a BooleanValues) Less(i, j int) bool

func (BooleanValues) MaxTime

func (a BooleanValues) MaxTime() int64

func (BooleanValues) Merge

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (BooleanValues) MinTime

func (a BooleanValues) MinTime() int64

func (BooleanValues) Size

func (a BooleanValues) Size() int

func (BooleanValues) Swap

func (a BooleanValues) Swap(i, j int)

type Cache

type Cache struct {
	// contains filtered or unexported fields
}

Cache maintains an in-memory store of Values for a set of keys.

func NewCache

func NewCache(maxSize uint64, path string) *Cache

NewCache returns an instance of a cache which will use a maximum of maxSize bytes of memory. Only used for engine caches, never for snapshots.

func (*Cache) ApplyEntryFn

func (c *Cache) ApplyEntryFn(f func(key []byte, entry *entry) error) error

ApplyEntryFn applies the function f to each entry in the Cache. ApplyEntryFn calls f on each entry in turn, within the same goroutine. It is safe for use by multiple goroutines.

func (*Cache) ClearSnapshot

func (c *Cache) ClearSnapshot(success bool)

ClearSnapshot removes the snapshot cache from the list of flushing caches and adjusts the size.

func (*Cache) Deduplicate

func (c *Cache) Deduplicate()

Deduplicate sorts the snapshot before returning it. The compactor and any queries coming in while it writes will need the values sorted.

func (*Cache) Delete

func (c *Cache) Delete(keys [][]byte)

Delete removes all values for the given keys from the cache.

func (*Cache) DeleteRange

func (c *Cache) DeleteRange(keys [][]byte, min, max int64)

DeleteRange removes the values for all keys containing points with timestamps between between min and max from the cache.

TODO(edd): Lock usage could possibly be optimised if necessary.

func (*Cache) Keys

func (c *Cache) Keys() [][]byte

Keys returns a sorted slice of all keys under management by the cache.

func (*Cache) MaxSize

func (c *Cache) MaxSize() uint64

MaxSize returns the maximum number of bytes the cache may consume.

func (*Cache) SetMaxSize

func (c *Cache) SetMaxSize(size uint64)

SetMaxSize updates the memory limit of the cache.

func (*Cache) Size

func (c *Cache) Size() uint64

Size returns the number of point-calcuated bytes the cache currently uses.

func (*Cache) Snapshot

func (c *Cache) Snapshot() (*Cache, error)

Snapshot takes a snapshot of the current cache, adds it to the slice of caches that are being flushed, and resets the current cache with new values.

func (*Cache) Statistics

func (c *Cache) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*Cache) UpdateAge

func (c *Cache) UpdateAge()

UpdateAge updates the age statistic based on the current time.

func (*Cache) UpdateCompactTime

func (c *Cache) UpdateCompactTime(d time.Duration)

UpdateCompactTime updates WAL compaction time statistic based on d.

func (*Cache) Values

func (c *Cache) Values(key []byte) Values

Values returns a copy of all values, deduped and sorted, for the given key.

func (*Cache) Write

func (c *Cache) Write(key []byte, values []Value) error

Write writes the set of values for the key to the cache. This function is goroutine-safe. It returns an error if the cache will exceed its max size by adding the new values.

func (*Cache) WriteMulti

func (c *Cache) WriteMulti(values map[string][]Value) error

WriteMulti writes the map of keys and associated values to the cache. This function is goroutine-safe. It returns an error if the cache will exceeded its max size by adding the new values. The write attempts to write as many values as possible. If one key fails, the others can still succeed and an error will be returned.

type CacheLoader

type CacheLoader struct {
	Logger zap.Logger
	// contains filtered or unexported fields
}

CacheLoader processes a set of WAL segment files, and loads a cache with the data contained within those files. Processing of the supplied files take place in the order they exist in the files slice.

func NewCacheLoader

func NewCacheLoader(files []string) *CacheLoader

NewCacheLoader returns a new instance of a CacheLoader.

func (*CacheLoader) Load

func (cl *CacheLoader) Load(cache *Cache) error

Load returns a cache loaded with the data contained within the segment files. If, during reading of a segment file, corruption is encountered, that segment file is truncated up to and including the last valid byte, and processing continues with the next segment file.

func (*CacheLoader) WithLogger

func (cl *CacheLoader) WithLogger(log zap.Logger)

WithLogger sets the logger on the CacheLoader.

type CacheStatistics

type CacheStatistics struct {
	MemSizeBytes        int64
	DiskSizeBytes       int64
	SnapshotCount       int64
	CacheAgeMs          int64
	CachedBytes         int64
	WALCompactionTimeMs int64
	WriteOK             int64
	WriteErr            int64
	WriteDropped        int64
}

CacheStatistics hold statistics related to the cache.

type CompactionGroup

type CompactionGroup []string

CompactionGroup represents a list of files eligible to be compacted together.

type CompactionPlanner

type CompactionPlanner interface {
	Plan(lastWrite time.Time) []CompactionGroup
	PlanLevel(level int) []CompactionGroup
	PlanOptimize() []CompactionGroup
	Release(group []CompactionGroup)
	FullyCompacted() bool
}

CompactionPlanner determines what TSM files and WAL segments to include in a given compaction run.

type Compactor

type Compactor struct {
	Dir  string
	Size int

	FileStore interface {
		NextGeneration() int
	}
	// contains filtered or unexported fields
}

Compactor merges multiple TSM files into new files or writes a Cache into 1 or more TSM files.

func (*Compactor) Close

func (c *Compactor) Close()

Close disables the Compactor.

func (*Compactor) CompactFast

func (c *Compactor) CompactFast(tsmFiles []string) ([]string, error)

CompactFast writes multiple smaller TSM files into 1 or more larger files.

func (*Compactor) CompactFull

func (c *Compactor) CompactFull(tsmFiles []string) ([]string, error)

CompactFull writes multiple smaller TSM files into 1 or more larger files.

func (*Compactor) DisableCompactions

func (c *Compactor) DisableCompactions()

DisableSnapshots disables the compactor from performing compactions.

func (*Compactor) DisableSnapshots

func (c *Compactor) DisableSnapshots()

DisableSnapshots disables the compactor from performing snapshots.

func (*Compactor) EnableCompactions

func (c *Compactor) EnableCompactions()

EnableCompactions allows the compactor to perform compactions.

func (*Compactor) EnableSnapshots

func (c *Compactor) EnableSnapshots()

EnableSnapshots allows the compactor to perform snapshots.

func (*Compactor) Open

func (c *Compactor) Open()

Open initializes the Compactor.

func (*Compactor) WriteSnapshot

func (c *Compactor) WriteSnapshot(cache *Cache) ([]string, error)

WriteSnapshot writes a Cache snapshot to one or more new TSM files.

type DefaultPlanner

type DefaultPlanner struct {
	FileStore fileStore
	// contains filtered or unexported fields
}

DefaultPlanner implements CompactionPlanner using a strategy to roll up multiple generations of TSM files into larger files in stages. It attempts to minimize the number of TSM files on disk while rolling up a bounder number of files.

func NewDefaultPlanner

func NewDefaultPlanner(fs fileStore, writeColdDuration time.Duration) *DefaultPlanner

func (*DefaultPlanner) FullyCompacted

func (c *DefaultPlanner) FullyCompacted() bool

FullyCompacted returns true if the shard is fully compacted.

func (*DefaultPlanner) Plan

func (c *DefaultPlanner) Plan(lastWrite time.Time) []CompactionGroup

Plan returns a set of TSM files to rewrite for level 4 or higher. The planning returns multiple groups if possible to allow compactions to run concurrently.

func (*DefaultPlanner) PlanLevel

func (c *DefaultPlanner) PlanLevel(level int) []CompactionGroup

PlanLevel returns a set of TSM files to rewrite for a specific level.

func (*DefaultPlanner) PlanOptimize

func (c *DefaultPlanner) PlanOptimize() []CompactionGroup

PlanOptimize returns all TSM files if they are in different generations in order to optimize the index across TSM files. Each returned compaction group can be compacted concurrently.

func (*DefaultPlanner) Release

func (c *DefaultPlanner) Release(groups []CompactionGroup)

Release removes the files reference in each compaction group allowing new plans to be able to use them.

type DeleteRangeWALEntry

type DeleteRangeWALEntry struct {
	Keys     [][]byte
	Min, Max int64
	// contains filtered or unexported fields
}

DeleteRangeWALEntry represents the deletion of multiple series.

func (*DeleteRangeWALEntry) Encode

func (w *DeleteRangeWALEntry) Encode(b []byte) ([]byte, error)

Encode converts the DeleteRangeWALEntry into a byte slice, appending to b.

func (*DeleteRangeWALEntry) MarshalBinary

func (w *DeleteRangeWALEntry) MarshalBinary() ([]byte, error)

MarshalBinary returns a binary representation of the entry in a new byte slice.

func (*DeleteRangeWALEntry) MarshalSize

func (w *DeleteRangeWALEntry) MarshalSize() int

func (*DeleteRangeWALEntry) Type

Type returns DeleteRangeWALEntryType.

func (*DeleteRangeWALEntry) UnmarshalBinary

func (w *DeleteRangeWALEntry) UnmarshalBinary(b []byte) error

UnmarshalBinary deserializes the byte slice into w.

type DeleteWALEntry

type DeleteWALEntry struct {
	Keys [][]byte
	// contains filtered or unexported fields
}

DeleteWALEntry represents the deletion of multiple series.

func (*DeleteWALEntry) Encode

func (w *DeleteWALEntry) Encode(dst []byte) ([]byte, error)

Encode converts the DeleteWALEntry into a byte slice, appending to dst.

func (*DeleteWALEntry) MarshalBinary

func (w *DeleteWALEntry) MarshalBinary() ([]byte, error)

MarshalBinary returns a binary representation of the entry in a new byte slice.

func (*DeleteWALEntry) MarshalSize

func (w *DeleteWALEntry) MarshalSize() int

func (*DeleteWALEntry) Type

func (w *DeleteWALEntry) Type() WalEntryType

Type returns DeleteWALEntryType.

func (*DeleteWALEntry) UnmarshalBinary

func (w *DeleteWALEntry) UnmarshalBinary(b []byte) error

UnmarshalBinary deserializes the byte slice into w.

type EmptyValue

type EmptyValue struct{}

EmptyValue is used when there is no appropriate other value.

func (EmptyValue) Size

func (e EmptyValue) Size() int

Size returns 0.

func (EmptyValue) String

func (e EmptyValue) String() string

String returns the empty string.

func (EmptyValue) UnixNano

func (e EmptyValue) UnixNano() int64

UnixNano returns tsdb.EOF.

func (EmptyValue) Value

func (e EmptyValue) Value() interface{}

Value returns nil.

type Engine

type Engine struct {
	WAL            *WAL
	Cache          *Cache
	Compactor      *Compactor
	CompactionPlan CompactionPlanner
	FileStore      *FileStore

	MaxPointsPerBlock int

	// CacheFlushMemorySizeThreshold specifies the minimum size threshodl for
	// the cache when the engine should write a snapshot to a TSM file
	CacheFlushMemorySizeThreshold uint64

	// CacheFlushWriteColdDuration specifies the length of time after which if
	// no writes have been committed to the WAL, the engine will write
	// a snapshot of the cache to a TSM file
	CacheFlushWriteColdDuration time.Duration
	// contains filtered or unexported fields
}

Engine represents a storage engine with compressed blocks.

func (*Engine) Backup

func (e *Engine) Backup(w io.Writer, basePath string, since time.Time) error

Backup writes a tar archive of any TSM files modified since the passed in time to the passed in writer. The basePath will be prepended to the names of the files in the archive. It will force a snapshot of the WAL first then perform the backup with a read lock against the file store. This means that new TSM files will not be able to be created in this shard while the backup is running. For shards that are still acively getting writes, this could cause the WAL to backup, increasing memory usage and evenutally rejecting writes.

func (*Engine) Close

func (e *Engine) Close() error

Close closes the engine. Subsequent calls to Close are a nop.

func (*Engine) CreateIterator

func (e *Engine) CreateIterator(measurement string, opt query.IteratorOptions) (query.Iterator, error)

CreateIterator returns an iterator for the measurement based on opt.

func (*Engine) CreateSeriesIfNotExists

func (e *Engine) CreateSeriesIfNotExists(key, name []byte, tags models.Tags) error

func (*Engine) CreateSeriesListIfNotExists

func (e *Engine) CreateSeriesListIfNotExists(keys, names [][]byte, tagsSlice []models.Tags) error

func (*Engine) CreateSnapshot

func (e *Engine) CreateSnapshot() (string, error)

CreateSnapshot will create a temp directory that holds temporary hardlinks to the underylyng shard files.

func (*Engine) DeleteMeasurement

func (e *Engine) DeleteMeasurement(name []byte) error

DeleteMeasurement deletes a measurement and all related series.

func (*Engine) DeleteSeriesRange

func (e *Engine) DeleteSeriesRange(seriesKeys [][]byte, min, max int64) error

DeleteSeriesRange removes the values between min and max (inclusive) from all series.

func (*Engine) DiskSize

func (e *Engine) DiskSize() int64

DiskSize returns the total size in bytes of all TSM and WAL segments on disk.

func (*Engine) ForEachMeasurementName

func (e *Engine) ForEachMeasurementName(fn func(name []byte) error) error

ForEachMeasurementName iterates over each measurement name in the engine.

func (*Engine) ForEachMeasurementTagKey

func (e *Engine) ForEachMeasurementTagKey(name []byte, fn func(key []byte) error) error

func (*Engine) HasTagKey

func (e *Engine) HasTagKey(name, key []byte) (bool, error)

func (*Engine) Import

func (e *Engine) Import(r io.Reader, basePath string) error

Import reads a tar archive generated by Backup() and adds each file matching basePath as a new TSM file. This obtains a write lock so no operations can be performed while Importing.

func (*Engine) IsIdle

func (e *Engine) IsIdle() bool

IsIdle returns true if the cache is empty, there are no running compactions and the shard is fully compacted.

func (*Engine) IteratorCost

func (e *Engine) IteratorCost(measurement string, opt query.IteratorOptions) (query.IteratorCost, error)

IteratorCost produces the cost of an iterator.

func (*Engine) KeyCursor

func (e *Engine) KeyCursor(key []byte, t int64, ascending bool) *KeyCursor

KeyCursor returns a KeyCursor for the given key starting at time t.

func (*Engine) LastModified

func (e *Engine) LastModified() time.Time

LastModified returns the time when this shard was last modified.

func (*Engine) LoadMetadataIndex

func (e *Engine) LoadMetadataIndex(shardID uint64, index tsdb.Index) error

LoadMetadataIndex loads the shard metadata into memory.

func (*Engine) MeasurementExists

func (e *Engine) MeasurementExists(name []byte) (bool, error)

func (*Engine) MeasurementFields

func (e *Engine) MeasurementFields(measurement []byte) *tsdb.MeasurementFields

MeasurementFields returns the measurement fields for a measurement.

func (*Engine) MeasurementNamesByExpr

func (e *Engine) MeasurementNamesByExpr(expr influxql.Expr) ([][]byte, error)

func (*Engine) MeasurementNamesByRegex

func (e *Engine) MeasurementNamesByRegex(re *regexp.Regexp) ([][]byte, error)

func (*Engine) MeasurementSeriesKeysByExpr

func (e *Engine) MeasurementSeriesKeysByExpr(name []byte, expr influxql.Expr) ([][]byte, error)

MeasurementSeriesKeysByExpr returns a list of series keys matching expr.

func (*Engine) MeasurementTagKeyValuesByExpr

func (e *Engine) MeasurementTagKeyValuesByExpr(name []byte, keys []string, expr influxql.Expr, keysSorted bool) ([][]string, error)

MeasurementTagKeyValuesByExpr returns a set of tag values filtered by an expression.

MeasurementTagKeyValuesByExpr relies on the provided tag keys being sorted. The caller can indicate the tag keys have been sorted by setting the keysSorted argument appropriately. Tag values are returned in a slice that is indexible according to the sorted order of the tag keys, e.g., the values for the earliest tag k will be available in index 0 of the returned values slice.

func (*Engine) MeasurementTagKeysByExpr

func (e *Engine) MeasurementTagKeysByExpr(name []byte, expr influxql.Expr) (map[string]struct{}, error)

func (*Engine) MeasurementsSketches

func (e *Engine) MeasurementsSketches() (estimator.Sketch, estimator.Sketch, error)

func (*Engine) Open

func (e *Engine) Open() error

Open opens and initializes the engine.

func (*Engine) Path

func (e *Engine) Path() string

Path returns the path the engine was opened with.

func (*Engine) Restore

func (e *Engine) Restore(r io.Reader, basePath string) error

Restore reads a tar archive generated by Backup(). Only files that match basePath will be copied into the directory. This obtains a write lock so no operations can be performed while restoring.

func (*Engine) SeriesN

func (e *Engine) SeriesN() int64

SeriesN returns the unique number of series in the index.

func (*Engine) SeriesPointIterator

func (e *Engine) SeriesPointIterator(opt query.IteratorOptions) (query.Iterator, error)

func (*Engine) SeriesSketches

func (e *Engine) SeriesSketches() (estimator.Sketch, estimator.Sketch, error)

func (*Engine) SetCompactionsEnabled

func (e *Engine) SetCompactionsEnabled(enabled bool)

SetCompactionsEnabled enables compactions on the engine. When disabled all running compactions are aborted and new compactions stop running.

func (*Engine) SetEnabled

func (e *Engine) SetEnabled(enabled bool)

SetEnabled sets whether the engine is enabled.

func (*Engine) SetFieldName

func (e *Engine) SetFieldName(measurement []byte, name string)

func (*Engine) ShouldCompactCache

func (e *Engine) ShouldCompactCache(lastWriteTime time.Time) bool

ShouldCompactCache returns true if the Cache is over its flush threshold or if the passed in lastWriteTime is older than the write cold threshold.

func (*Engine) Statistics

func (e *Engine) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*Engine) TagKeyCardinality

func (e *Engine) TagKeyCardinality(name, key []byte) int

func (*Engine) WithLogger

func (e *Engine) WithLogger(log zap.Logger)

WithLogger sets the logger for the engine.

func (*Engine) WritePoints

func (e *Engine) WritePoints(points []models.Point) error

WritePoints writes metadata and point data into the engine. It returns an error if new points are added to an existing key.

func (*Engine) WriteSnapshot

func (e *Engine) WriteSnapshot() error

WriteSnapshot will snapshot the cache and write a new TSM file with its contents, releasing the snapshot when done.

func (*Engine) WriteTo

func (e *Engine) WriteTo(w io.Writer) (n int64, err error)

WriteTo is not implemented.

type EngineStatistics

type EngineStatistics struct {
	CacheCompactions        int64 // Counter of cache compactions that have ever run.
	CacheCompactionsActive  int64 // Gauge of cache compactions currently running.
	CacheCompactionErrors   int64 // Counter of cache compactions that have failed due to error.
	CacheCompactionDuration int64 // Counter of number of wall nanoseconds spent in cache compactions.

	TSMCompactions        [3]int64 // Counter of TSM compactions (by level) that have ever run.
	TSMCompactionsActive  [3]int64 // Gauge of TSM compactions (by level) currently running.
	TSMCompactionErrors   [3]int64 // Counter of TSM compcations (by level) that have failed due to error.
	TSMCompactionDuration [3]int64 // Counter of number of wall nanoseconds spent in TSM compactions (by level).

	TSMOptimizeCompactions        int64 // Counter of optimize compactions that have ever run.
	TSMOptimizeCompactionsActive  int64 // Gauge of optimize compactions currently running.
	TSMOptimizeCompactionErrors   int64 // Counter of optimize compactions that have failed due to error.
	TSMOptimizeCompactionDuration int64 // Counter of number of wall nanoseconds spent in optimize compactions.

	TSMFullCompactions        int64 // Counter of full compactions that have ever run.
	TSMFullCompactionsActive  int64 // Gauge of full compactions currently running.
	TSMFullCompactionErrors   int64 // Counter of full compactions that have failed due to error.
	TSMFullCompactionDuration int64 // Counter of number of wall nanoseconds spent in full compactions.
}

EngineStatistics maintains statistics for the engine.

type FileStat

type FileStat struct {
	Path             string
	HasTombstone     bool
	Size             uint32
	LastModified     int64
	MinTime, MaxTime int64
	MinKey, MaxKey   []byte
}

FileStat holds information about a TSM file on disk.

func (FileStat) ContainsKey

func (f FileStat) ContainsKey(key []byte) bool

ContainsKey returns true if the min and max keys of the file overlap the arguments min and max.

func (FileStat) OverlapsKeyRange

func (f FileStat) OverlapsKeyRange(min, max []byte) bool

OverlapsKeyRange returns true if the min and max keys of the file overlap the arguments min and max.

func (FileStat) OverlapsTimeRange

func (f FileStat) OverlapsTimeRange(min, max int64) bool

OverlapsTimeRange returns true if the time range of the file intersect min and max.

type FileStore

type FileStore struct {
	// contains filtered or unexported fields
}

FileStore is an abstraction around multiple TSM files.

func NewFileStore

func NewFileStore(dir string) *FileStore

NewFileStore returns a new instance of FileStore based on the given directory.

func (*FileStore) BlockCount

func (f *FileStore) BlockCount(path string, idx int) int

BlockCount returns number of values stored in the block at location idx in the file at path. If path does not match any file in the store, 0 is returned. If idx is out of range for the number of blocks in the file, 0 is returned.

func (*FileStore) Close

func (f *FileStore) Close() error

Close closes the file store.

func (*FileStore) Cost

func (f *FileStore) Cost(key []byte, min, max int64) query.IteratorCost

func (*FileStore) Count

func (f *FileStore) Count() int

Count returns the number of TSM files currently loaded.

func (*FileStore) CreateSnapshot

func (f *FileStore) CreateSnapshot() (string, error)

CreateSnapshot creates hardlinks for all tsm and tombstone files in the path provided.

func (*FileStore) CurrentGeneration

func (f *FileStore) CurrentGeneration() int

CurrentGeneration returns the current generation of the TSM files.

func (*FileStore) Delete

func (f *FileStore) Delete(keys [][]byte) error

Delete removes the keys from the set of keys available in this file.

func (*FileStore) DeleteRange

func (f *FileStore) DeleteRange(keys [][]byte, min, max int64) error

DeleteRange removes the values for keys between timestamps min and max.

func (*FileStore) DiskSizeBytes

func (f *FileStore) DiskSizeBytes() int64

func (*FileStore) Files

func (f *FileStore) Files() []TSMFile

Files returns the slice of TSM files currently loaded.

func (*FileStore) KeyCursor

func (f *FileStore) KeyCursor(key []byte, t int64, ascending bool) *KeyCursor

KeyCursor returns a KeyCursor for key and t across the files in the FileStore.

func (*FileStore) Keys

func (f *FileStore) Keys() map[string]byte

Keys returns all keys and types for all files in the file store.

func (*FileStore) LastModified

func (f *FileStore) LastModified() time.Time

LastModified returns the last time the file store was updated with new TSM files or a delete.

func (*FileStore) NextGeneration

func (f *FileStore) NextGeneration() int

NextGeneration increments the max file ID and returns the new value.

func (*FileStore) Open

func (f *FileStore) Open() error

Open loads all the TSM files in the configured directory.

func (*FileStore) Read

func (f *FileStore) Read(key []byte, t int64) ([]Value, error)

Read returns the slice of values for the given key and the given timestamp, if any file matches those constraints.

func (*FileStore) Replace

func (f *FileStore) Replace(oldFiles, newFiles []string) error

Replace replaces oldFiles with newFiles.

func (*FileStore) ReplaceWithCallback

func (f *FileStore) ReplaceWithCallback(oldFiles, newFiles []string, updatedFn func(r []TSMFile)) error

ReplaceWithCallback replaces oldFiles with newFiles and calls updatedFn with the files to be added the FileStore.

func (*FileStore) Statistics

func (f *FileStore) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*FileStore) Stats

func (f *FileStore) Stats() []FileStat

Stats returns the stats of the underlying files, preferring the cached version if it is still valid.

func (*FileStore) Type

func (f *FileStore) Type(key []byte) (byte, error)

Type returns the type of values store at the block for key.

func (*FileStore) WalkKeys

func (f *FileStore) WalkKeys(fn func(key []byte, typ byte) error) error

WalkKeys calls fn for every key in every TSM file known to the FileStore. If the key exists in multiple files, it will be invoked for each file.

func (*FileStore) WithLogger

func (f *FileStore) WithLogger(log zap.Logger)

WithLogger sets the logger on the file store.

type FileStoreStatistics

type FileStoreStatistics struct {
	DiskBytes int64
	FileCount int64
}

FileStoreStatistics keeps statistics about the file store.

type FloatDecoder

type FloatDecoder struct {
	// contains filtered or unexported fields
}

FloatDecoder decodes a byte slice into multiple float64 values.

func (*FloatDecoder) Error

func (it *FloatDecoder) Error() error

Error returns the current decoding error.

func (*FloatDecoder) Next

func (it *FloatDecoder) Next() bool

Next returns true if there are remaining values to read.

func (*FloatDecoder) SetBytes

func (it *FloatDecoder) SetBytes(b []byte) error

SetBytes initializes the decoder with b. Must call before calling Next().

func (*FloatDecoder) Values

func (it *FloatDecoder) Values() float64

Values returns the current float64 value.

type FloatEncoder

type FloatEncoder struct {
	// contains filtered or unexported fields
}

FloatEncoder encodes multiple float64s into a byte slice.

func NewFloatEncoder

func NewFloatEncoder() *FloatEncoder

NewFloatEncoder returns a new FloatEncoder.

func (*FloatEncoder) Bytes

func (s *FloatEncoder) Bytes() ([]byte, error)

Bytes returns a copy of the underlying byte buffer used in the encoder.

func (*FloatEncoder) Flush

func (s *FloatEncoder) Flush()

Flush indicates there are no more values to encode.

func (*FloatEncoder) Reset

func (s *FloatEncoder) Reset()

Reset sets the encoder back to its initial state.

func (*FloatEncoder) Write

func (s *FloatEncoder) Write(v float64)

Write encodes v to the underlying buffer.

type FloatValue

type FloatValue struct {
	// contains filtered or unexported fields
}

FloatValue represents a float64 value.

func DecodeFloatBlock

func DecodeFloatBlock(block []byte, a *[]FloatValue) ([]FloatValue, error)

DecodeFloatBlock decodes the float block from the byte slice and appends the float values to a.

func (FloatValue) Size

func (v FloatValue) Size() int

Size returns the number of bytes necessary to represent the value and its timestamp.

func (FloatValue) String

func (v FloatValue) String() string

String returns the string representation of the value and its timestamp.

func (FloatValue) UnixNano

func (v FloatValue) UnixNano() int64

UnixNano returns the timestamp of the value.

func (FloatValue) Value

func (v FloatValue) Value() interface{}

Value returns the underlying float64 value.

type FloatValues

type FloatValues []FloatValue

FloatValues represents a slice of Float values.

func (FloatValues) Deduplicate

func (a FloatValues) Deduplicate() FloatValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (FloatValues) Encode

func (a FloatValues) Encode(buf []byte) ([]byte, error)

func (FloatValues) Exclude

func (a FloatValues) Exclude(min, max int64) FloatValues

Exclude returns the subset of values not in [min, max]

func (FloatValues) Include

func (a FloatValues) Include(min, max int64) FloatValues

Include returns the subset values between min and max inclusive.

func (FloatValues) Len

func (a FloatValues) Len() int

Sort methods

func (FloatValues) Less

func (a FloatValues) Less(i, j int) bool

func (FloatValues) MaxTime

func (a FloatValues) MaxTime() int64

func (FloatValues) Merge

func (a FloatValues) Merge(b FloatValues) FloatValues

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (FloatValues) MinTime

func (a FloatValues) MinTime() int64

func (FloatValues) Size

func (a FloatValues) Size() int

func (FloatValues) Swap

func (a FloatValues) Swap(i, j int)

type IndexEntry

type IndexEntry struct {
	// The min and max time of all points stored in the block.
	MinTime, MaxTime int64

	// The absolute position in the file where this block is located.
	Offset int64

	// The size in bytes of the block in the file.
	Size uint32
}

IndexEntry is the index information for a given block in a TSM file.

func (*IndexEntry) AppendTo

func (e *IndexEntry) AppendTo(b []byte) []byte

AppendTo writes a binary-encoded version of IndexEntry to b, allocating and returning a new slice, if necessary.

func (*IndexEntry) Contains

func (e *IndexEntry) Contains(t int64) bool

Contains returns true if this IndexEntry may contain values for the given time. The min and max times are inclusive.

func (*IndexEntry) OverlapsTimeRange

func (e *IndexEntry) OverlapsTimeRange(min, max int64) bool

OverlapsTimeRange returns true if the given time ranges are completely within the entry's time bounds.

func (*IndexEntry) String

func (e *IndexEntry) String() string

String returns a string representation of the entry.

func (*IndexEntry) UnmarshalBinary

func (e *IndexEntry) UnmarshalBinary(b []byte) error

UnmarshalBinary decodes an IndexEntry from a byte slice.

type IndexWriter

type IndexWriter interface {
	// Add records a new block entry for a key in the index.
	Add(key []byte, blockType byte, minTime, maxTime int64, offset int64, size uint32)

	// Entries returns all index entries for a key.
	Entries(key []byte) []IndexEntry

	// Keys returns the unique set of keys in the index.
	Keys() [][]byte

	// KeyCount returns the count of unique keys in the index.
	KeyCount() int

	// Size returns the size of a the current index in bytes.
	Size() uint32

	// MarshalBinary returns a byte slice encoded version of the index.
	MarshalBinary() ([]byte, error)

	// WriteTo writes the index contents to a writer.
	WriteTo(w io.Writer) (int64, error)
}

IndexWriter writes a TSMIndex.

func NewIndexWriter

func NewIndexWriter() IndexWriter

NewIndexWriter returns a new IndexWriter.

type IntegerDecoder

type IntegerDecoder struct {
	// contains filtered or unexported fields
}

IntegerDecoder decodes a byte slice into int64s.

func (*IntegerDecoder) Error

func (d *IntegerDecoder) Error() error

Error returns the last error encountered by the decoder.

func (*IntegerDecoder) Next

func (d *IntegerDecoder) Next() bool

Next returns true if there are any values remaining to be decoded.

func (*IntegerDecoder) Read

func (d *IntegerDecoder) Read() int64

Read returns the next value from the decoder.

func (*IntegerDecoder) SetBytes

func (d *IntegerDecoder) SetBytes(b []byte)

SetBytes sets the underlying byte slice of the decoder.

type IntegerEncoder

type IntegerEncoder struct {
	// contains filtered or unexported fields
}

IntegerEncoder encodes int64s into byte slices.

func NewIntegerEncoder

func NewIntegerEncoder(sz int) IntegerEncoder

NewIntegerEncoder returns a new integer encoder with an initial buffer of values sized at sz.

func (*IntegerEncoder) Bytes

func (e *IntegerEncoder) Bytes() ([]byte, error)

Bytes returns a copy of the underlying buffer.

func (*IntegerEncoder) Flush

func (e *IntegerEncoder) Flush()

Flush is no-op

func (*IntegerEncoder) Reset

func (e *IntegerEncoder) Reset()

Reset sets the encoder back to its initial state.

func (*IntegerEncoder) Write

func (e *IntegerEncoder) Write(v int64)

Write encodes v to the underlying buffers.

type IntegerValue

type IntegerValue struct {
	// contains filtered or unexported fields
}

IntegerValue represents an int64 value.

func DecodeIntegerBlock

func DecodeIntegerBlock(block []byte, a *[]IntegerValue) ([]IntegerValue, error)

DecodeIntegerBlock decodes the integer block from the byte slice and appends the integer values to a.

func (IntegerValue) Size

func (v IntegerValue) Size() int

Size returns the number of bytes necessary to represent the value and its timestamp.

func (IntegerValue) String

func (v IntegerValue) String() string

String returns the string representation of the value and its timestamp.

func (IntegerValue) UnixNano

func (v IntegerValue) UnixNano() int64

UnixNano returns the timestamp of the value.

func (IntegerValue) Value

func (v IntegerValue) Value() interface{}

Value returns the underlying int64 value.

type IntegerValues

type IntegerValues []IntegerValue

IntegerValues represents a slice of Integer values.

func (IntegerValues) Deduplicate

func (a IntegerValues) Deduplicate() IntegerValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (IntegerValues) Encode

func (a IntegerValues) Encode(buf []byte) ([]byte, error)

func (IntegerValues) Exclude

func (a IntegerValues) Exclude(min, max int64) IntegerValues

Exclude returns the subset of values not in [min, max]

func (IntegerValues) Include

func (a IntegerValues) Include(min, max int64) IntegerValues

Include returns the subset values between min and max inclusive.

func (IntegerValues) Len

func (a IntegerValues) Len() int

Sort methods

func (IntegerValues) Less

func (a IntegerValues) Less(i, j int) bool

func (IntegerValues) MaxTime

func (a IntegerValues) MaxTime() int64

func (IntegerValues) Merge

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (IntegerValues) MinTime

func (a IntegerValues) MinTime() int64

func (IntegerValues) Size

func (a IntegerValues) Size() int

func (IntegerValues) Swap

func (a IntegerValues) Swap(i, j int)

type KeyCursor

type KeyCursor struct {
	// contains filtered or unexported fields
}

KeyCursor allows iteration through keys in a set of files within a FileStore.

func (*KeyCursor) Close

func (c *KeyCursor) Close()

Close removes all references on the cursor.

func (*KeyCursor) Next

func (c *KeyCursor) Next()

Next moves the cursor to the next position. Data should be read by the ReadBlock functions.

func (*KeyCursor) ReadBooleanBlock

func (c *KeyCursor) ReadBooleanBlock(buf *[]BooleanValue) ([]BooleanValue, error)

ReadBooleanBlock reads the next block as a set of boolean values.

func (*KeyCursor) ReadFloatBlock

func (c *KeyCursor) ReadFloatBlock(buf *[]FloatValue) ([]FloatValue, error)

ReadFloatBlock reads the next block as a set of float values.

func (*KeyCursor) ReadIntegerBlock

func (c *KeyCursor) ReadIntegerBlock(buf *[]IntegerValue) ([]IntegerValue, error)

ReadIntegerBlock reads the next block as a set of integer values.

func (*KeyCursor) ReadStringBlock

func (c *KeyCursor) ReadStringBlock(buf *[]StringValue) ([]StringValue, error)

ReadStringBlock reads the next block as a set of string values.

func (*KeyCursor) ReadUnsignedBlock

func (c *KeyCursor) ReadUnsignedBlock(buf *[]UnsignedValue) ([]UnsignedValue, error)

ReadUnsignedBlock reads the next block as a set of unsigned values.

type KeyIterator

type KeyIterator interface {
	// Next returns true if there are any values remaining in the iterator.
	Next() bool

	// Read returns the key, time range, and raw data for the next block,
	// or any error that occurred.
	Read() (key []byte, minTime int64, maxTime int64, data []byte, err error)

	// Close closes the iterator.
	Close() error
}

KeyIterator allows iteration over set of keys and values in sorted order.

func NewCacheKeyIterator

func NewCacheKeyIterator(cache *Cache, size int, interrupt chan struct{}) KeyIterator

NewCacheKeyIterator returns a new KeyIterator from a Cache.

func NewTSMKeyIterator

func NewTSMKeyIterator(size int, fast bool, interrupt chan struct{}, readers ...*TSMReader) (KeyIterator, error)

NewTSMKeyIterator returns a new TSM key iterator from readers. size indicates the maximum number of values to encode in a single block.

type StringDecoder

type StringDecoder struct {
	// contains filtered or unexported fields
}

StringDecoder decodes a byte slice into strings.

func (*StringDecoder) Error

func (e *StringDecoder) Error() error

Error returns the last error encountered by the decoder.

func (*StringDecoder) Next

func (e *StringDecoder) Next() bool

Next returns true if there are any values remaining to be decoded.

func (*StringDecoder) Read

func (e *StringDecoder) Read() string

Read returns the next value from the decoder.

func (*StringDecoder) SetBytes

func (e *StringDecoder) SetBytes(b []byte) error

SetBytes initializes the decoder with bytes to read from. This must be called before calling any other method.

type StringEncoder

type StringEncoder struct {
	// contains filtered or unexported fields
}

StringEncoder encodes multiple strings into a byte slice.

func NewStringEncoder

func NewStringEncoder(sz int) StringEncoder

NewStringEncoder returns a new StringEncoder with an initial buffer ready to hold sz bytes.

func (*StringEncoder) Bytes

func (e *StringEncoder) Bytes() ([]byte, error)

Bytes returns a copy of the underlying buffer.

func (*StringEncoder) Flush

func (e *StringEncoder) Flush()

Flush is no-op

func (*StringEncoder) Reset

func (e *StringEncoder) Reset()

Reset sets the encoder back to its initial state.

func (*StringEncoder) Write

func (e *StringEncoder) Write(s string)

Write encodes s to the underlying buffer.

type StringValue

type StringValue struct {
	// contains filtered or unexported fields
}

StringValue represents a string value.

func DecodeStringBlock

func DecodeStringBlock(block []byte, a *[]StringValue) ([]StringValue, error)

DecodeStringBlock decodes the string block from the byte slice and appends the string values to a.

func (StringValue) Size

func (v StringValue) Size() int

Size returns the number of bytes necessary to represent the value and its timestamp.

func (StringValue) String

func (v StringValue) String() string

String returns the string representation of the value and its timestamp.

func (StringValue) UnixNano

func (v StringValue) UnixNano() int64

UnixNano returns the timestamp of the value.

func (StringValue) Value

func (v StringValue) Value() interface{}

Value returns the underlying string value.

type StringValues

type StringValues []StringValue

StringValues represents a slice of String values.

func (StringValues) Deduplicate

func (a StringValues) Deduplicate() StringValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (StringValues) Encode

func (a StringValues) Encode(buf []byte) ([]byte, error)

func (StringValues) Exclude

func (a StringValues) Exclude(min, max int64) StringValues

Exclude returns the subset of values not in [min, max]

func (StringValues) Include

func (a StringValues) Include(min, max int64) StringValues

Include returns the subset values between min and max inclusive.

func (StringValues) Len

func (a StringValues) Len() int

Sort methods

func (StringValues) Less

func (a StringValues) Less(i, j int) bool

func (StringValues) MaxTime

func (a StringValues) MaxTime() int64

func (StringValues) Merge

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (StringValues) MinTime

func (a StringValues) MinTime() int64

func (StringValues) Size

func (a StringValues) Size() int

func (StringValues) Swap

func (a StringValues) Swap(i, j int)

type TSMFile

type TSMFile interface {
	// Path returns the underlying file path for the TSMFile.  If the file
	// has not be written or loaded from disk, the zero value is returned.
	Path() string

	// Read returns all the values in the block where time t resides.
	Read(key []byte, t int64) ([]Value, error)

	// ReadAt returns all the values in the block identified by entry.
	ReadAt(entry *IndexEntry, values []Value) ([]Value, error)
	ReadFloatBlockAt(entry *IndexEntry, values *[]FloatValue) ([]FloatValue, error)
	ReadIntegerBlockAt(entry *IndexEntry, values *[]IntegerValue) ([]IntegerValue, error)
	ReadUnsignedBlockAt(entry *IndexEntry, values *[]UnsignedValue) ([]UnsignedValue, error)
	ReadStringBlockAt(entry *IndexEntry, values *[]StringValue) ([]StringValue, error)
	ReadBooleanBlockAt(entry *IndexEntry, values *[]BooleanValue) ([]BooleanValue, error)

	// Entries returns the index entries for all blocks for the given key.
	Entries(key []byte) []IndexEntry
	ReadEntries(key []byte, entries *[]IndexEntry)

	// Returns true if the TSMFile may contain a value with the specified
	// key and time.
	ContainsValue(key []byte, t int64) bool

	// Contains returns true if the file contains any values for the given
	// key.
	Contains(key []byte) bool

	// TimeRange returns the min and max time across all keys in the file.
	TimeRange() (int64, int64)

	// TombstoneRange returns ranges of time that are deleted for the given key.
	TombstoneRange(key []byte) []TimeRange

	// KeyRange returns the min and max keys in the file.
	KeyRange() ([]byte, []byte)

	// KeyCount returns the number of distinct keys in the file.
	KeyCount() int

	// KeyAt returns the key located at index position idx.
	KeyAt(idx int) ([]byte, byte)

	// Type returns the block type of the values stored for the key.  Returns one of
	// BlockFloat64, BlockInt64, BlockBoolean, BlockString.  If key does not exist,
	// an error is returned.
	Type(key []byte) (byte, error)

	// Delete removes the keys from the set of keys available in this file.
	Delete(keys [][]byte) error

	// DeleteRange removes the values for keys between timestamps min and max.
	DeleteRange(keys [][]byte, min, max int64) error

	// HasTombstones returns true if file contains values that have been deleted.
	HasTombstones() bool

	// TombstoneFiles returns the tombstone filestats if there are any tombstones
	// written for this file.
	TombstoneFiles() []FileStat

	// Close closes the underlying file resources.
	Close() error

	// Size returns the size of the file on disk in bytes.
	Size() uint32

	// Rename renames the existing TSM file to a new name and replaces the mmap backing slice using the new
	// file name.  Index and Reader state are not re-initialized.
	Rename(path string) error

	// Remove deletes the file from the filesystem.
	Remove() error

	// InUse returns true if the file is currently in use by queries.
	InUse() bool

	// Ref records that this file is actively in use.
	Ref()

	// Unref records that this file is no longer in use.
	Unref()

	// Stats returns summary information about the TSM file.
	Stats() FileStat

	// BlockIterator returns an iterator pointing to the first block in the file and
	// allows sequential iteration to each and every block.
	BlockIterator() *BlockIterator
}

TSMFile represents an on-disk TSM file.

type TSMIndex

type TSMIndex interface {
	// Delete removes the given keys from the index.
	Delete(keys [][]byte)

	// DeleteRange removes the given keys with data between minTime and maxTime from the index.
	DeleteRange(keys [][]byte, minTime, maxTime int64)

	// Contains return true if the given key exists in the index.
	Contains(key []byte) bool

	// ContainsValue returns true if key and time might exist in this file.  This function could
	// return true even though the actual point does not exists.  For example, the key may
	// exist in this file, but not have a point exactly at time t.
	ContainsValue(key []byte, timestamp int64) bool

	// Entries returns all index entries for a key.
	Entries(key []byte) []IndexEntry

	// ReadEntries reads the index entries for key into entries.
	ReadEntries(key []byte, entries *[]IndexEntry)

	// Entry returns the index entry for the specified key and timestamp.  If no entry
	// matches the key and timestamp, nil is returned.
	Entry(key []byte, timestamp int64) *IndexEntry

	// Key returns the key in the index at the given position.
	Key(index int) ([]byte, byte, []IndexEntry)

	// KeyAt returns the key in the index at the given position.
	KeyAt(index int) ([]byte, byte)

	// KeyCount returns the count of unique keys in the index.
	KeyCount() int

	// OverlapsTimeRange returns true if the time range of the file intersect min and max.
	OverlapsTimeRange(min, max int64) bool

	// OverlapsKeyRange returns true if the min and max keys of the file overlap the arguments min and max.
	OverlapsKeyRange(min, max []byte) bool

	// Size returns the size of the current index in bytes.
	Size() uint32

	// TimeRange returns the min and max time across all keys in the file.
	TimeRange() (int64, int64)

	// TombstoneRange returns ranges of time that are deleted for the given key.
	TombstoneRange(key []byte) []TimeRange

	// KeyRange returns the min and max keys in the file.
	KeyRange() ([]byte, []byte)

	// Type returns the block type of the values stored for the key.  Returns one of
	// BlockFloat64, BlockInt64, BlockBool, BlockString.  If key does not exist,
	// an error is returned.
	Type(key []byte) (byte, error)

	// UnmarshalBinary populates an index from an encoded byte slice
	// representation of an index.
	UnmarshalBinary(b []byte) error
}

TSMIndex represent the index section of a TSM file. The index records all blocks, their locations, sizes, min and max times.

type TSMReader

type TSMReader struct {
	// contains filtered or unexported fields
}

TSMReader is a reader for a TSM file.

func NewTSMReader

func NewTSMReader(f *os.File) (*TSMReader, error)

NewTSMReader returns a new TSMReader from the given file.

func (*TSMReader) BlockIterator

func (t *TSMReader) BlockIterator() *BlockIterator

BlockIterator returns a BlockIterator for the underlying TSM file.

func (*TSMReader) Close

func (t *TSMReader) Close() error

Close closes the TSMReader.

func (*TSMReader) Contains

func (t *TSMReader) Contains(key []byte) bool

Contains returns whether the given key is present in the index.

func (*TSMReader) ContainsValue

func (t *TSMReader) ContainsValue(key []byte, ts int64) bool

ContainsValue returns true if key and time might exists in this file. This function could return true even though the actual point does not exist. For example, the key may exist in this file, but not have a point exactly at time t.

func (*TSMReader) Delete

func (t *TSMReader) Delete(keys [][]byte) error

Delete deletes blocks indicated by keys.

func (*TSMReader) DeleteRange

func (t *TSMReader) DeleteRange(keys [][]byte, minTime, maxTime int64) error

DeleteRange removes the given points for keys between minTime and maxTime. The series keys passed in must be sorted.

func (*TSMReader) Entries

func (t *TSMReader) Entries(key []byte) []IndexEntry

Entries returns all index entries for key.

func (*TSMReader) HasTombstones

func (t *TSMReader) HasTombstones() bool

HasTombstones return true if there are any tombstone entries recorded.

func (*TSMReader) InUse

func (t *TSMReader) InUse() bool

InUse returns whether the TSMReader currently has any active references.

func (*TSMReader) IndexSize

func (t *TSMReader) IndexSize() uint32

IndexSize returns the size of the index in bytes.

func (*TSMReader) Key

func (t *TSMReader) Key(index int) ([]byte, byte, []IndexEntry)

Key returns the key and the underlying entry at the numeric index.

func (*TSMReader) KeyAt

func (t *TSMReader) KeyAt(idx int) ([]byte, byte)

KeyAt returns the key and key type at position idx in the index.

func (*TSMReader) KeyCount

func (t *TSMReader) KeyCount() int

KeyCount returns the count of unique keys in the TSMReader.

func (*TSMReader) KeyRange

func (t *TSMReader) KeyRange() ([]byte, []byte)

KeyRange returns the min and max key across all keys in the file.

func (*TSMReader) LastModified

func (t *TSMReader) LastModified() int64

LastModified returns the last time the underlying file was modified.

func (*TSMReader) Path

func (t *TSMReader) Path() string

Path returns the path of the file the TSMReader was initialized with.

func (*TSMReader) Read

func (t *TSMReader) Read(key []byte, timestamp int64) ([]Value, error)

Read returns the values corresponding to the block at the given key and timestamp.

func (*TSMReader) ReadAll

func (t *TSMReader) ReadAll(key []byte) ([]Value, error)

ReadAll returns all values for a key in all blocks.

func (*TSMReader) ReadAt

func (t *TSMReader) ReadAt(entry *IndexEntry, vals []Value) ([]Value, error)

ReadAt returns the values corresponding to the given index entry.

func (*TSMReader) ReadBooleanBlockAt

func (t *TSMReader) ReadBooleanBlockAt(entry *IndexEntry, vals *[]BooleanValue) ([]BooleanValue, error)

ReadBooleanBlockAt returns the boolean values corresponding to the given index entry.

func (*TSMReader) ReadBytes

func (t *TSMReader) ReadBytes(e *IndexEntry, b []byte) (uint32, []byte, error)

func (*TSMReader) ReadEntries

func (t *TSMReader) ReadEntries(key []byte, entries *[]IndexEntry)

ReadEntries reads the index entries for key into entries.

func (*TSMReader) ReadFloatBlockAt

func (t *TSMReader) ReadFloatBlockAt(entry *IndexEntry, vals *[]FloatValue) ([]FloatValue, error)

ReadFloatBlockAt returns the float values corresponding to the given index entry.

func (*TSMReader) ReadIntegerBlockAt

func (t *TSMReader) ReadIntegerBlockAt(entry *IndexEntry, vals *[]IntegerValue) ([]IntegerValue, error)

ReadIntegerBlockAt returns the integer values corresponding to the given index entry.

func (*TSMReader) ReadStringBlockAt

func (t *TSMReader) ReadStringBlockAt(entry *IndexEntry, vals *[]StringValue) ([]StringValue, error)

ReadStringBlockAt returns the string values corresponding to the given index entry.

func (*TSMReader) ReadUnsignedBlockAt

func (t *TSMReader) ReadUnsignedBlockAt(entry *IndexEntry, vals *[]UnsignedValue) ([]UnsignedValue, error)

ReadUnsignedBlockAt returns the unsigned integer values corresponding to the given index entry.

func (*TSMReader) Ref

func (t *TSMReader) Ref()

Ref records a usage of this TSMReader. If there are active references when the reader is closed or removed, the reader will remain open until there are no more references.

func (*TSMReader) Remove

func (t *TSMReader) Remove() error

Remove removes any underlying files stored on disk for this reader.

func (*TSMReader) Rename

func (t *TSMReader) Rename(path string) error

Rename renames the underlying file to the new path.

func (*TSMReader) Size

func (t *TSMReader) Size() uint32

Size returns the size of the underlying file in bytes.

func (*TSMReader) Stats

func (t *TSMReader) Stats() FileStat

Stats returns the FileStat for the TSMReader's underlying file.

func (*TSMReader) TimeRange

func (t *TSMReader) TimeRange() (int64, int64)

TimeRange returns the min and max time across all keys in the file.

func (*TSMReader) TombstoneFiles

func (t *TSMReader) TombstoneFiles() []FileStat

TombstoneFiles returns any tombstone files associated with this TSM file.

func (*TSMReader) TombstoneRange

func (t *TSMReader) TombstoneRange(key []byte) []TimeRange

TombstoneRange returns ranges of time that are deleted for the given key.

func (*TSMReader) Type

func (t *TSMReader) Type(key []byte) (byte, error)

Type returns the type of values stored at the given key.

func (*TSMReader) Unref

func (t *TSMReader) Unref()

Unref removes a usage record of this TSMReader. If the Reader was closed by another goroutine while there were active references, the file will be closed and remove

type TSMWriter

type TSMWriter interface {
	// Write writes a new block for key containing and values.  Writes append
	// blocks in the order that the Write function is called.  The caller is
	// responsible for ensuring keys and blocks are sorted appropriately.
	// Values are encoded as a full block.  The caller is responsible for
	// ensuring a fixed number of values are encoded in each block as well as
	// ensuring the Values are sorted. The first and last timestamp values are
	// used as the minimum and maximum values for the index entry.
	Write(key []byte, values Values) error

	// WriteBlock writes a new block for key containing the bytes in block.  WriteBlock appends
	// blocks in the order that the WriteBlock function is called.  The caller is
	// responsible for ensuring keys and blocks are sorted appropriately, and that the
	// block and index information is correct for the block.  The minTime and maxTime
	// timestamp values are used as the minimum and maximum values for the index entry.
	WriteBlock(key []byte, minTime, maxTime int64, block []byte) error

	// WriteIndex finishes the TSM write streams and writes the index.
	WriteIndex() error

	// Flushes flushes all pending changes to the underlying file resources.
	Flush() error

	// Close closes any underlying file resources.
	Close() error

	// Size returns the current size in bytes of the file.
	Size() uint32
}

TSMWriter writes TSM formatted key and values.

func NewTSMWriter

func NewTSMWriter(w io.Writer) (TSMWriter, error)

NewTSMWriter returns a new TSMWriter writing to w.

type TimeDecoder

type TimeDecoder struct {
	// contains filtered or unexported fields
}

TimeDecoder decodes a byte slice into timestamps.

func (*TimeDecoder) Error

func (d *TimeDecoder) Error() error

Error returns the last error encountered by the decoder.

func (*TimeDecoder) Init

func (d *TimeDecoder) Init(b []byte)

Init initializes the decoder with bytes to read from.

func (*TimeDecoder) Next

func (d *TimeDecoder) Next() bool

Next returns true if there are any timestamps remaining to be decoded.

func (*TimeDecoder) Read

func (d *TimeDecoder) Read() int64

Read returns the next timestamp from the decoder.

type TimeEncoder

type TimeEncoder interface {
	Write(t int64)
	Bytes() ([]byte, error)
	Reset()
}

TimeEncoder encodes time.Time to byte slices.

func NewTimeEncoder

func NewTimeEncoder(sz int) TimeEncoder

NewTimeEncoder returns a TimeEncoder with an initial buffer ready to hold sz bytes.

type TimeRange

type TimeRange struct {
	Min, Max int64
}

TimeRange holds a min and max timestamp.

type Tombstone

type Tombstone struct {
	// Key is the tombstoned series key.
	Key []byte

	// Min and Max are the min and max unix nanosecond time ranges of Key that are deleted.  If
	// the full range is deleted, both values are -1.
	Min, Max int64
}

Tombstone represents an individual deletion.

type Tombstoner

type Tombstoner struct {

	// Path is the location of the file to record tombstone. This should be the
	// full path to a TSM file.
	Path string
	// contains filtered or unexported fields
}

Tombstoner records tombstones when entries are deleted.

func (*Tombstoner) Add

func (t *Tombstoner) Add(keys [][]byte) error

Add adds the all keys, across all timestamps, to the tombstone.

func (*Tombstoner) AddRange

func (t *Tombstoner) AddRange(keys [][]byte, min, max int64) error

AddRange adds all keys to the tombstone specifying only the data between min and max to be removed.

func (*Tombstoner) Delete

func (t *Tombstoner) Delete() error

Delete removes all the tombstone files from disk.

func (*Tombstoner) HasTombstones

func (t *Tombstoner) HasTombstones() bool

HasTombstones return true if there are any tombstone entries recorded.

func (*Tombstoner) ReadAll

func (t *Tombstoner) ReadAll() ([]Tombstone, error)

ReadAll returns all the tombstones in the Tombstoner's directory.

func (*Tombstoner) TombstoneFiles

func (t *Tombstoner) TombstoneFiles() []FileStat

TombstoneFiles returns any tombstone files associated with Tombstoner's TSM file.

func (*Tombstoner) Walk

func (t *Tombstoner) Walk(fn func(t Tombstone) error) error

Walk calls fn for every Tombstone under the Tombstoner.

type UnsignedValue

type UnsignedValue struct {
	// contains filtered or unexported fields
}

UnsignedValue represents an int64 value.

func DecodeUnsignedBlock

func DecodeUnsignedBlock(block []byte, a *[]UnsignedValue) ([]UnsignedValue, error)

DecodeUnsignedBlock decodes the unsigned integer block from the byte slice and appends the unsigned integer values to a.

func (UnsignedValue) Size

func (v UnsignedValue) Size() int

Size returns the number of bytes necessary to represent the value and its timestamp.

func (UnsignedValue) String

func (v UnsignedValue) String() string

String returns the string representation of the value and its timestamp.

func (UnsignedValue) UnixNano

func (v UnsignedValue) UnixNano() int64

UnixNano returns the timestamp of the value.

func (UnsignedValue) Value

func (v UnsignedValue) Value() interface{}

Value returns the underlying int64 value.

type UnsignedValues

type UnsignedValues []UnsignedValue

UnsignedValues represents a slice of Unsigned values.

func (UnsignedValues) Deduplicate

func (a UnsignedValues) Deduplicate() UnsignedValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (UnsignedValues) Encode

func (a UnsignedValues) Encode(buf []byte) ([]byte, error)

func (UnsignedValues) Exclude

func (a UnsignedValues) Exclude(min, max int64) UnsignedValues

Exclude returns the subset of values not in [min, max]

func (UnsignedValues) Include

func (a UnsignedValues) Include(min, max int64) UnsignedValues

Include returns the subset values between min and max inclusive.

func (UnsignedValues) Len

func (a UnsignedValues) Len() int

Sort methods

func (UnsignedValues) Less

func (a UnsignedValues) Less(i, j int) bool

func (UnsignedValues) MaxTime

func (a UnsignedValues) MaxTime() int64

func (UnsignedValues) Merge

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (UnsignedValues) MinTime

func (a UnsignedValues) MinTime() int64

func (UnsignedValues) Size

func (a UnsignedValues) Size() int

func (UnsignedValues) Swap

func (a UnsignedValues) Swap(i, j int)

type Value

type Value interface {
	// UnixNano returns the timestamp of the value in nanoseconds since unix epoch.
	UnixNano() int64

	// Value returns the underlying value.
	Value() interface{}

	// Size returns the number of bytes necessary to represent the value and its timestamp.
	Size() int

	// String returns the string representation of the value and its timestamp.
	String() string
	// contains filtered or unexported methods
}

Value represents a TSM-encoded value.

func DecodeBlock

func DecodeBlock(block []byte, vals []Value) ([]Value, error)

DecodeBlock takes a byte slice and decodes it into values of the appropriate type based on the block.

func NewBooleanValue

func NewBooleanValue(t int64, v bool) Value

NewBooleanValue returns a new boolean value.

func NewFloatValue

func NewFloatValue(t int64, v float64) Value

NewFloatValue returns a new float value.

func NewIntegerValue

func NewIntegerValue(t int64, v int64) Value

NewIntegerValue returns a new integer value.

func NewStringValue

func NewStringValue(t int64, v string) Value

NewStringValue returns a new string value.

func NewUnsignedValue

func NewUnsignedValue(t int64, v uint64) Value

NewUnsignedValue returns a new unsigned integer value.

func NewValue

func NewValue(t int64, value interface{}) Value

NewValue returns a new Value with the underlying type dependent on value.

type Values

type Values []Value

Values represents a slice of values.

func (Values) Deduplicate

func (a Values) Deduplicate() Values

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (Values) Encode

func (a Values) Encode(buf []byte) ([]byte, error)

Encode converts the values to a byte slice. If there are no values, this function panics.

func (Values) Exclude

func (a Values) Exclude(min, max int64) Values

Exclude returns the subset of values not in [min, max]

func (Values) Include

func (a Values) Include(min, max int64) Values

Include returns the subset values between min and max inclusive.

func (Values) InfluxQLType

func (a Values) InfluxQLType() (influxql.DataType, error)

InfluxQLType returns the influxql.DataType the values map to.

func (Values) Len

func (a Values) Len() int

Sort methods

func (Values) Less

func (a Values) Less(i, j int) bool

func (Values) MaxTime

func (a Values) MaxTime() int64

func (Values) Merge

func (a Values) Merge(b Values) Values

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (Values) MinTime

func (a Values) MinTime() int64

func (Values) Size

func (a Values) Size() int

func (Values) Swap

func (a Values) Swap(i, j int)

type WAL

type WAL struct {

	// SegmentSize is the file size at which a segment file will be rotated
	SegmentSize int
	// contains filtered or unexported fields
}

WAL represents the write-ahead log used for writing TSM files.

func NewWAL

func NewWAL(path string) *WAL

NewWAL initializes a new WAL at the given directory.

func (*WAL) Close

func (l *WAL) Close() error

Close will finish any flush that is currently in progress and close file handles.

func (*WAL) CloseSegment

func (l *WAL) CloseSegment() error

CloseSegment closes the current segment if it is non-empty and opens a new one.

func (*WAL) ClosedSegments

func (l *WAL) ClosedSegments() ([]string, error)

ClosedSegments returns a slice of the names of the closed segment files.

func (*WAL) Delete

func (l *WAL) Delete(keys [][]byte) (int, error)

Delete deletes the given keys, returning the segment ID for the operation.

func (*WAL) DeleteRange

func (l *WAL) DeleteRange(keys [][]byte, min, max int64) (int, error)

DeleteRange deletes the given keys within the given time range, returning the segment ID for the operation.

func (*WAL) DiskSizeBytes

func (l *WAL) DiskSizeBytes() int64

func (*WAL) LastWriteTime

func (l *WAL) LastWriteTime() time.Time

LastWriteTime is the last time anything was written to the WAL.

func (*WAL) Open

func (l *WAL) Open() error

Open opens and initializes the Log. Open can recover from previous unclosed shutdowns.

func (*WAL) Path

func (l *WAL) Path() string

Path returns the directory the log was initialized with.

func (*WAL) Remove

func (l *WAL) Remove(files []string) error

Remove deletes the given segment file paths from disk and cleans up any associated objects.

func (*WAL) Statistics

func (l *WAL) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*WAL) WithLogger

func (l *WAL) WithLogger(log zap.Logger)

WithLogger sets the WAL's logger.

func (*WAL) WriteMulti

func (l *WAL) WriteMulti(values map[string][]Value) (int, error)

WriteMulti writes the given values to the WAL. It returns the WAL segment ID to which the points were written. If an error is returned the segment ID should be ignored.

type WALEntry

type WALEntry interface {
	Type() WalEntryType
	Encode(dst []byte) ([]byte, error)
	MarshalBinary() ([]byte, error)
	UnmarshalBinary(b []byte) error
	MarshalSize() int
}

WALEntry is record stored in each WAL segment. Each entry has a type and an opaque, type dependent byte slice data attribute.

type WALSegmentReader

type WALSegmentReader struct {
	// contains filtered or unexported fields
}

WALSegmentReader reads WAL segments.

func NewWALSegmentReader

func NewWALSegmentReader(r io.ReadCloser) *WALSegmentReader

NewWALSegmentReader returns a new WALSegmentReader reading from r.

func (*WALSegmentReader) Close

func (r *WALSegmentReader) Close() error

Close closes the underlying io.Reader.

func (*WALSegmentReader) Count

func (r *WALSegmentReader) Count() int64

Count returns the total number of bytes read successfully from the segment, as of the last call to Read(). The segment is guaranteed to be valid up to and including this number of bytes.

func (*WALSegmentReader) Error

func (r *WALSegmentReader) Error() error

Error returns the last error encountered by the reader.

func (*WALSegmentReader) Next

func (r *WALSegmentReader) Next() bool

Next indicates if there is a value to read.

func (*WALSegmentReader) Read

func (r *WALSegmentReader) Read() (WALEntry, error)

Read returns the next entry in the reader.

type WALSegmentWriter

type WALSegmentWriter struct {
	// contains filtered or unexported fields
}

WALSegmentWriter writes WAL segments.

func NewWALSegmentWriter

func NewWALSegmentWriter(w io.WriteCloser) *WALSegmentWriter

NewWALSegmentWriter returns a new WALSegmentWriter writing to w.

func (*WALSegmentWriter) Flush

func (w *WALSegmentWriter) Flush() error

func (*WALSegmentWriter) Write

func (w *WALSegmentWriter) Write(entryType WalEntryType, compressed []byte) error

Write writes entryType and the buffer containing compressed entry data.

type WALStatistics

type WALStatistics struct {
	OldBytes     int64
	CurrentBytes int64
	WriteOK      int64
	WriteErr     int64
}

WALStatistics maintains statistics about the WAL.

type WalEntryType

type WalEntryType byte

WalEntryType is a byte written to a wal segment file that indicates what the following compressed block contains.

const (
	// WriteWALEntryType indicates a write entry.
	WriteWALEntryType WalEntryType = 0x01

	// DeleteWALEntryType indicates a delete entry.
	DeleteWALEntryType WalEntryType = 0x02

	// DeleteRangeWALEntryType indicates a delete range entry.
	DeleteRangeWALEntryType WalEntryType = 0x03
)

type WriteWALEntry

type WriteWALEntry struct {
	Values map[string][]Value
	// contains filtered or unexported fields
}

WriteWALEntry represents a write of points.

func (*WriteWALEntry) Encode

func (w *WriteWALEntry) Encode(dst []byte) ([]byte, error)

Encode converts the WriteWALEntry into a byte stream using dst if it is large enough. If dst is too small, the slice will be grown to fit the encoded entry.

func (*WriteWALEntry) MarshalBinary

func (w *WriteWALEntry) MarshalBinary() ([]byte, error)

MarshalBinary returns a binary representation of the entry in a new byte slice.

func (*WriteWALEntry) MarshalSize

func (w *WriteWALEntry) MarshalSize() int

func (*WriteWALEntry) Type

func (w *WriteWALEntry) Type() WalEntryType

Type returns WriteWALEntryType.

func (*WriteWALEntry) UnmarshalBinary

func (w *WriteWALEntry) UnmarshalBinary(b []byte) error

UnmarshalBinary deserializes the byte slice into w.

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