tsm1

package
v0.0.0-...-b4b1223 Latest Latest
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 Go to latest Published: Feb 7, 2019 License: MIT Imports: 31 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)
)
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, 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 NewMultiFieldCursor 

func NewMultiFieldCursor(fields []string, cursors []tsdb.Cursor, ascending bool) tsdb.Cursor

NewMultiFieldCursor returns an instance of Cursor that joins the results of cursors.

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, string)

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 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() string

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

func (*BlockIterator) Read 

func (b *BlockIterator) Read() (key string, minTime int64, maxTime int64, 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) 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 (b BooleanValue) Size() int

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

func (BooleanValue) String 

func (f BooleanValue) String() string

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

func (BooleanValue) UnixNano 

func (b BooleanValue) UnixNano() int64

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

func (BooleanValue) Value 

func (b 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) 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 

func (a BooleanValues) Merge(b BooleanValues) BooleanValues

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 string, 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 []string)

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

func (*Cache) DeleteRange 

func (c *Cache) DeleteRange(keys []string, 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() []string

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 string) Values

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

func (*Cache) Write 

func (c *Cache) Write(key string, 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
}

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 interface {
		Stats() []FileStat
		LastModified() time.Time
		BlockCount(path string, idx int) int
	}

	// CompactFullWriteColdDuration specifies the length of time after
	// which if no writes have been committed to the WAL, the engine will
	// do a full compaction of the TSM files in this shard. This duration
	// should always be greater than the CacheFlushWriteColdDuraion
	CompactFullWriteColdDuration time.Duration
	// 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 (*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.

type DeleteRangeWALEntry 

type DeleteRangeWALEntry struct {
	Keys     []string
	Min, Max int64
}

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) Type 

func (w *DeleteRangeWALEntry) Type() WalEntryType

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 []string
}

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) 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) ContainsSeries 

func (e *Engine) ContainsSeries(keys []string) (map[string]bool, error)

ContainsSeries returns a map of keys indicating whether the key exists and has values or not.

func (*Engine) CreateIterator 

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

CreateIterator returns an iterator for the measurement based on opt.

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 string, seriesKeys []string) error

DeleteMeasurement deletes a measurement and all related series.

func (*Engine) DeleteSeries 

func (e *Engine) DeleteSeries(seriesKeys []string) error

DeleteSeries removes all series keys from the engine.

func (*Engine) DeleteSeriesRange 

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

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

func (*Engine) Format 

func (e *Engine) Format() tsdb.EngineFormat

Format returns the format type of this engine.

func (*Engine) Index 

func (e *Engine) Index() *tsdb.DatabaseIndex

Index returns the database index.

func (*Engine) KeyCursor 

func (e *Engine) KeyCursor(key string, 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.DatabaseIndex) error

LoadMetadataIndex loads the shard metadata into memory.

func (*Engine) MeasurementFields 

func (e *Engine) MeasurementFields(measurement string) *tsdb.MeasurementFields

MeasurementFields returns the measurement fields for a measurement.

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) SeriesCount 

func (e *Engine) SeriesCount() (n int, err error)

SeriesCount returns the number of series buckets on the shard.

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) 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) 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   string
}

FileStat holds information about a TSM file on disk.

func (FileStat) ContainsKey 

func (f FileStat) ContainsKey(key string) 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 string) 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) Add 

func (f *FileStore) Add(files ...TSMFile)

Add adds the given files to the file store's list of files.

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) 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 []string) error

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

func (*FileStore) DeleteRange 

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

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

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 string, 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 string, 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) Remove 

func (f *FileStore) Remove(paths ...string)

Remove removes the files with matching paths from the set of active files. It does not remove the paths from disk.

func (*FileStore) Replace 

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

Replace replaces oldFiles with newFiles.

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 string) (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) Finish 

func (s *FloatEncoder) Finish()

Finish indicates there are no more values to encode.

func (*FloatEncoder) Push 

func (s *FloatEncoder) Push(v float64)

Push encodes v to the underlying buffer.

func (*FloatEncoder) Reset 

func (s *FloatEncoder) Reset()

Reset sets the encoder back to its initial state.

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 (f FloatValue) Size() int

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

func (FloatValue) String 

func (f FloatValue) String() string

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

func (FloatValue) UnixNano 

func (f FloatValue) UnixNano() int64

UnixNano returns the timestamp of the value.

func (FloatValue) Value 

func (f 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) 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 string, blockType byte, minTime, maxTime int64, offset int64, size uint32)

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

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

	// 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) 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
}

FloatValue 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 (f 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) 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 

func (a IntegerValues) Merge(b IntegerValues) IntegerValues

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.

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 string, 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) KeyIterator

NewCacheKeyIterator returns a new KeyIterator from a Cache.

func NewTSMKeyIterator 

func NewTSMKeyIterator(size int, fast bool, 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) 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 (f 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) 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 

func (a StringValues) Merge(b StringValues) StringValues

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 string, 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)
	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 string) []IndexEntry
	ReadEntries(key string, entries *[]IndexEntry)

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

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

	// KeyRange returns the min and max keys in the file.
	KeyRange() (string, string)

	// 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 string) (byte, error)

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

	// DeleteRange removes the values for keys between timestamps min and max.
	DeleteRange(keys []string, 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
	// contains filtered or unexported methods
}

TSMFile represents an on-disk TSM file.

type TSMIndex 

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

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

	// Contains return true if the given key exists in the index.
	Contains(key string) 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 string, timestamp int64) bool

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

	// ReadEntries reads the index entries for key into entries.
	ReadEntries(key string, 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 string, timestamp int64) *IndexEntry

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

	// 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 string) []TimeRange

	// KeyRange returns the min and max keys in the file.
	KeyRange() (string, string)

	// 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 string) (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 string) bool

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

func (*TSMReader) ContainsValue 

func (t *TSMReader) ContainsValue(key string, 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 []string) error

Delete deletes blocks indicated by keys.

func (*TSMReader) DeleteRange 

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

DeleteRange removes the given points for keys between minTime and maxTime.

func (*TSMReader) Entries 

func (t *TSMReader) Entries(key string) []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) (string, []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() (string, string)

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 string, 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 string) ([]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) ReadEntries 

func (t *TSMReader) ReadEntries(key string, 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) 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 string) []TimeRange

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

func (*TSMReader) Type 

func (t *TSMReader) Type(key string) (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 string, 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 string, minTime, maxTime int64, block []byte) error

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

	// 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 []string) error

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

func (*Tombstoner) AddRange 

func (t *Tombstoner) AddRange(keys []string, 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 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 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 []string) (int, error)

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

func (*WAL) DeleteRange 

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

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

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) WritePoints 

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

WritePoints writes the given points 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
}

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) 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
}

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) 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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