executor

package
v2.1.1+incompatible Latest Latest
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 Go to latest Published: Apr 16, 2018 License: Apache-2.0 Imports: 26 Imported by: 0

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Index

Constants

View Source 
const RecordsPerRead = 2000
View Source 
const WriteChannelCommandDepth = 1000000

NOTE: Access to the TransactionPipe structures is single threaded with the exception of the CommandChannel. Modification of the cache contents is performed by de-queueing commands from the CommandChannel in the single Cache thread.

Variables

This section is empty.

Functions

func AppendIntervalTicks 

func AppendIntervalTicks(buf []byte, t time.Time, index, intervalsPerDay int64) (outBuf []byte)

func FinishAndWait 

func FinishAndWait()

FinishAndWait closes the writtenIndexes channel, and waits for the remaining triggers to fire, returning

func NewIOPlan 

func NewIOPlan(fl SortedFileList, pr *planner.ParseResult) (iop *ioplan, err error)

func NewInstanceSetup 

func NewInstanceSetup(relRootDir string, options ...bool)

func NewReader 

func NewReader(pr *planner.ParseResult) (r *reader, err error)

func StartupCacheAndWAL 

func StartupCacheAndWAL(rootDir string) (tgc *TransactionPipe, wf *WALFileType, err error)

func WriteBufferToFile 

func WriteBufferToFile(fp stdio.WriterAt, buffer offsetIndexBuffer) error

func WriteBufferToFileIndirect 

func WriteBufferToFileIndirect(fp *os.File, buffer offsetIndexBuffer) (err error)

func WriteCSM 

func WriteCSM(csm io.ColumnSeriesMap, isVariableLength bool) (err error)

WriteCSM writs ColumnSeriesMap csm to each destination file, and flush it to the disk, isVariableLength is set to true if the record content is variable-length type. WriteCSM also verifies the DataShapeVector of the incoming ColumnSeriesMap matches the on-disk DataShapeVector defined by the file header. WriteCSM will create any files if they do not already exist for the given ColumnSeriesMap based on its TimeBucketKey.

Types

type CacheEntryAlreadyOpenError 

type CacheEntryAlreadyOpenError string

WAL Messages

func (CacheEntryAlreadyOpenError) Error 

func (msg CacheEntryAlreadyOpenError) Error() string

type CacheImmutableError 

type CacheImmutableError string

func (CacheImmutableError) Error 

func (msg CacheImmutableError) Error() string

type CachedFP 

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

func NewCachedFP 

func NewCachedFP() *CachedFP

func (*CachedFP) Close 

func (cfp *CachedFP) Close() error

func (*CachedFP) GetFP 

func (cfp *CachedFP) GetFP(fileName string) (fp *os.File, err error)

type DestEnum 

type DestEnum int8

--- Destination ID 

const (
	WAL DestEnum = iota
	CHECKPOINT
)

type FileStatusEnum 

type FileStatusEnum int8
const (
	Invalid FileStatusEnum = iota
	OPEN
	CLOSED
)

type IndirectRecordInfo 

type IndirectRecordInfo struct {
	Index, Offset, Len int64
}

type InstanceMetadata 

type InstanceMetadata struct {
	InstanceID      int64
	RootDir         string
	CatalogDir      *catalog.Directory
	TXNPipe         *TransactionPipe
	WALFile         *WALFileType
	WALWg           sync.WaitGroup
	ShutdownPending bool
	WALBypass       bool
	TriggerMatchers []*trigger.TriggerMatcher
}
var ThisInstance *InstanceMetadata

type MIDEnum 

type MIDEnum int8

Message Types for WAL Messages --- Message ID 

const (
	TGDATA MIDEnum = iota
	TXNINFO
	STATUS
)

type NotOpenError 

type NotOpenError string

func (NotOpenError) Error 

func (msg NotOpenError) Error() string

type RecordLengthNotConsistent 

type RecordLengthNotConsistent string

func (RecordLengthNotConsistent) Error 

func (msg RecordLengthNotConsistent) Error() string

type ReplayStateEnum 

type ReplayStateEnum int8
const (
	Invalid2 ReplayStateEnum = iota
	NOTREPLAYED
	REPLAYED
	REPLAYINPROCESS
)

type ShortReadError 

type ShortReadError string

func (ShortReadError) Error 

func (msg ShortReadError) Error() string

type SingleTargetRequiredForWriter 

type SingleTargetRequiredForWriter string

func (SingleTargetRequiredForWriter) Error 

func (msg SingleTargetRequiredForWriter) Error() string

type SortedFileList 

type SortedFileList []planner.QualifiedFile

func (SortedFileList) Len 

func (fl SortedFileList) Len() int

func (SortedFileList) Less 

func (fl SortedFileList) Less(i, j int) bool

func (SortedFileList) Swap 

func (fl SortedFileList) Swap(i, j int)

type TGIDlist 

type TGIDlist []int64

func (TGIDlist) Len 

func (tgl TGIDlist) Len() int

func (TGIDlist) Less 

func (tgl TGIDlist) Less(i, j int) bool

func (TGIDlist) Swap 

func (tgl TGIDlist) Swap(i, j int)

type TransactionPipe 

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

TransactionPipe stores the contents of the current pending Transaction Group and writes it to WAL when flush() is called

func NewTransactionPipe 

func NewTransactionPipe() *TransactionPipe

NewTransactionPipe creates a new transaction pipe that channels all of the write transactions to the WAL and primary writers

func (*TransactionPipe) NewTGID 

func (tgc *TransactionPipe) NewTGID() int64

NewTGID monotonically increases the transaction group ID using the current unix epoch nanosecond timestamp

func (*TransactionPipe) TGID 

func (tgc *TransactionPipe) TGID() int64

TGID returns the latest transaction group ID

type TxnStatusEnum 

type TxnStatusEnum int8

--- Status 

const (
	PREPARING TxnStatusEnum = iota
	COMMITINTENDED
	COMMITCOMPLETE
)

type WALCreateError 

type WALCreateError string

func (WALCreateError) Error 

func (msg WALCreateError) Error() string

type WALFileType 

type WALFileType struct {
	// These three fields plus the MID form the WAL Header, written at the beginning of the WAL File
	FileStatus       FileStatusEnum
	ReplayState      ReplayStateEnum
	OwningInstanceID int64
	// End of WAL Header
	RootPath string // Path to the root directory, base of FileName
	FilePath string // WAL file full path

	FilePtr *os.File // Active file pointer to FileName
	// contains filtered or unexported fields
}

func NewWALFile 

func NewWALFile(rootDir string, existingFilePath string) (wf *WALFileType, err error)

func (*WALFileType) CanDeleteSafely 

func (wf *WALFileType) CanDeleteSafely() bool

func (*WALFileType) CanWrite 

func (wf *WALFileType) CanWrite(msg string) bool

func (*WALFileType) Close 

func (wf *WALFileType) Close(ReplayStatus ReplayStateEnum)

func (*WALFileType) Delete 

func (wf *WALFileType) Delete() (err error)

func (*WALFileType) FullPathToWALKey 

func (wf *WALFileType) FullPathToWALKey(fullPath string) (keyPath string)

func (*WALFileType) IsOpen 

func (wf *WALFileType) IsOpen() bool

func (*WALFileType) NeedsReplay 

func (wf *WALFileType) NeedsReplay() bool

func (*WALFileType) Open 

func (wf *WALFileType) Open() error

func (*WALFileType) ReadStatus 

func (wf *WALFileType) ReadStatus() (fileStatus FileStatusEnum, replayStatus ReplayStateEnum, OwningInstanceID int64, err error)

func (*WALFileType) Replay 

func (wf *WALFileType) Replay(writeData bool) error

func (*WALFileType) RequestFlush 

func (wf *WALFileType) RequestFlush()

RequestFlush requests WAL Flush to the WAL writer goroutine if it exists, or just does the work in the same goroutine otherwise. The function blocks if there are no current queued flushes, and returns if there is already one queued which will handle the data present in the write channel, as it will flush as soon as possible.

func (*WALFileType) SyncWAL 

func (wf *WALFileType) SyncWAL(WALRefresh, PrimaryRefresh time.Duration, walRotateInterval int)

func (*WALFileType) WALKeyToFullPath 

func (wf *WALFileType) WALKeyToFullPath(keyPath string) (fullPath string)

func (*WALFileType) WriteStatus 

func (wf *WALFileType) WriteStatus(FileStatus FileStatusEnum, ReplayState ReplayStateEnum)

func (*WALFileType) WriteTransactionInfo 

func (wf *WALFileType) WriteTransactionInfo(tid int64, did DestEnum, txnStatus TxnStatusEnum)

type WALTakeOverError 

type WALTakeOverError string

func (WALTakeOverError) Error 

func (msg WALTakeOverError) Error() string

type WALWriteError 

type WALWriteError string

func (WALWriteError) Error 

func (msg WALWriteError) Error() string

type WriteCommand 

type WriteCommand struct {
	RecordType    io.EnumRecordType
	WALKeyPath    string
	Offset, Index int64
	Data          []byte
}

type Writer 

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

func NewWriter 

func NewWriter(tbi *io.TimeBucketInfo, tgc *TransactionPipe, rootCatDir *catalog.Directory) (*Writer, error)

func (*Writer) AddNewYearFile 

func (w *Writer) AddNewYearFile(year int16) (err error)

func (*Writer) WriteRecords 

func (w *Writer) WriteRecords(ts []time.Time, data []byte)

WriteRecords creates a WriteCommand from the supplied timestamp and data buffer, and sends it over the write channel to be flushed to disk in the WAL sync subroutine. The caller should assume that by calling WriteRecords directly, the data will be written to the file regardless if it satisfies the on-disk data shape, possible corrupting the data files. It is recommended to call WriteCSM() for any writes as it is safer.

type WrongSizeError 

type WrongSizeError string

func (WrongSizeError) Error 

func (msg WrongSizeError) Error() string

Source Files

View all Source files

Directories

Path Synopsis
package buffile helps batch write by writes to the tempobary in-memory buffer under the assumption that many writes come in to the part of single file frequently.
 package buffile helps batch write by writes to the tempobary in-memory buffer under the assumption that many writes come in to the part of single file frequently.

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