2019-05-22 23:16:55 +02:00
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package storage
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import (
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"fmt"
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"io"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
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2020-07-23 19:42:57 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
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2019-05-22 23:16:55 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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2020-07-23 18:21:49 +02:00
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storagepacelimiter"
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2019-05-22 23:16:55 +02:00
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)
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2020-04-27 07:13:41 +02:00
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// BlockRef references a Block.
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//
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// BlockRef is valid only until the corresponding Search is valid,
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// i.e. it becomes invalid after Search.MustClose is called.
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type BlockRef struct {
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p *part
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bh blockHeader
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}
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func (br *BlockRef) reset() {
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br.p = nil
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br.bh = blockHeader{}
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}
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func (br *BlockRef) init(p *part, bh *blockHeader) {
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br.p = p
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br.bh = *bh
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}
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// MustReadBlock reads block from br to dst.
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//
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// if fetchData is false, then only block header is read, otherwise all the data is read.
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func (br *BlockRef) MustReadBlock(dst *Block, fetchData bool) {
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dst.Reset()
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dst.bh = br.bh
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if !fetchData {
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return
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}
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dst.timestampsData = bytesutil.Resize(dst.timestampsData[:0], int(br.bh.TimestampsBlockSize))
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br.p.timestampsFile.MustReadAt(dst.timestampsData, int64(br.bh.TimestampsBlockOffset))
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dst.valuesData = bytesutil.Resize(dst.valuesData[:0], int(br.bh.ValuesBlockSize))
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br.p.valuesFile.MustReadAt(dst.valuesData, int64(br.bh.ValuesBlockOffset))
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}
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// MetricBlockRef contains reference to time series block for a single metric.
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type MetricBlockRef struct {
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// The metric name
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MetricName []byte
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// The block reference. Call BlockRef.MustReadBlock in order to obtain the block.
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BlockRef *BlockRef
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}
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2019-05-22 23:16:55 +02:00
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// MetricBlock is a time series block for a single metric.
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type MetricBlock struct {
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2020-04-27 07:13:41 +02:00
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// MetricName is metric name for the given Block.
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2019-05-22 23:16:55 +02:00
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MetricName []byte
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2020-04-27 07:13:41 +02:00
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// Block is a block for the given MetricName
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Block Block
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2019-05-22 23:16:55 +02:00
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}
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// Marshal marshals MetricBlock to dst
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func (mb *MetricBlock) Marshal(dst []byte) []byte {
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dst = encoding.MarshalBytes(dst, mb.MetricName)
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2020-04-27 07:13:41 +02:00
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return MarshalBlock(dst, &mb.Block)
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2019-05-22 23:16:55 +02:00
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}
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// MarshalBlock marshals b to dst.
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//
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// b.MarshalData must be called on b before calling MarshalBlock.
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func MarshalBlock(dst []byte, b *Block) []byte {
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dst = b.bh.Marshal(dst)
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dst = encoding.MarshalBytes(dst, b.timestampsData)
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dst = encoding.MarshalBytes(dst, b.valuesData)
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return dst
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}
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// Unmarshal unmarshals MetricBlock from src
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func (mb *MetricBlock) Unmarshal(src []byte) ([]byte, error) {
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2020-04-27 07:13:41 +02:00
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mb.Block.Reset()
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2019-05-22 23:16:55 +02:00
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tail, mn, err := encoding.UnmarshalBytes(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal MetricName: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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mb.MetricName = append(mb.MetricName[:0], mn...)
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src = tail
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2020-04-27 07:13:41 +02:00
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return UnmarshalBlock(&mb.Block, src)
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2019-05-22 23:16:55 +02:00
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}
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// UnmarshalBlock unmarshal Block from src to dst.
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//
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// dst.UnmarshalData isn't called on the block.
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func UnmarshalBlock(dst *Block, src []byte) ([]byte, error) {
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tail, err := dst.bh.Unmarshal(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal blockHeader: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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src = tail
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tail, tds, err := encoding.UnmarshalBytes(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal timestampsData: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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dst.timestampsData = append(dst.timestampsData[:0], tds...)
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src = tail
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tail, vd, err := encoding.UnmarshalBytes(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal valuesData: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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dst.valuesData = append(dst.valuesData[:0], vd...)
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src = tail
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return src, nil
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}
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// Search is a search for time series.
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type Search struct {
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2020-04-27 07:13:41 +02:00
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// MetricBlockRef is updated with each Search.NextMetricBlock call.
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MetricBlockRef MetricBlockRef
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2019-05-22 23:16:55 +02:00
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2021-03-22 21:41:47 +01:00
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idb *indexDB
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2019-05-22 23:16:55 +02:00
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ts tableSearch
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2020-08-10 12:45:44 +02:00
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// tr contains time range used in the serach.
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tr TimeRange
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2020-08-10 12:36:00 +02:00
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// tfss contains tag filters used in the search.
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tfss []*TagFilters
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2020-07-23 19:42:57 +02:00
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// deadline in unix timestamp seconds for the current search.
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deadline uint64
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2019-05-22 23:16:55 +02:00
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err error
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needClosing bool
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2020-07-23 18:21:49 +02:00
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loops int
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2019-05-22 23:16:55 +02:00
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}
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func (s *Search) reset() {
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2020-04-27 07:13:41 +02:00
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s.MetricBlockRef.MetricName = s.MetricBlockRef.MetricName[:0]
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s.MetricBlockRef.BlockRef = nil
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2019-05-22 23:16:55 +02:00
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2021-03-22 21:41:47 +01:00
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s.idb = nil
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2019-05-22 23:16:55 +02:00
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s.ts.reset()
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2020-08-10 12:45:44 +02:00
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s.tr = TimeRange{}
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2020-08-10 12:36:00 +02:00
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s.tfss = nil
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2020-07-23 19:42:57 +02:00
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s.deadline = 0
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2019-05-22 23:16:55 +02:00
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s.err = nil
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s.needClosing = false
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2020-07-23 18:21:49 +02:00
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s.loops = 0
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2019-05-22 23:16:55 +02:00
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}
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// Init initializes s from the given storage, tfss and tr.
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//
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// MustClose must be called when the search is done.
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2020-08-06 18:17:51 +02:00
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//
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// Init returns the upper bound on the number of found time series.
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func (s *Search) Init(storage *Storage, tfss []*TagFilters, tr TimeRange, maxMetrics int, deadline uint64) int {
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2019-05-22 23:16:55 +02:00
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if s.needClosing {
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logger.Panicf("BUG: missing MustClose call before the next call to Init")
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}
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s.reset()
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2020-08-10 12:45:44 +02:00
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s.tr = tr
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2020-08-10 12:36:00 +02:00
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s.tfss = tfss
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2020-07-23 19:42:57 +02:00
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s.deadline = deadline
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2019-05-22 23:16:55 +02:00
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s.needClosing = true
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2020-07-23 19:42:57 +02:00
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tsids, err := storage.searchTSIDs(tfss, tr, maxMetrics, deadline)
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2020-01-30 00:59:43 +01:00
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if err == nil {
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2020-07-23 19:42:57 +02:00
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err = storage.prefetchMetricNames(tsids, deadline)
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2020-01-30 00:59:43 +01:00
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}
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2019-05-22 23:16:55 +02:00
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// It is ok to call Init on error from storage.searchTSIDs.
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// Init must be called before returning because it will fail
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// on Seach.MustClose otherwise.
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2020-04-27 07:13:41 +02:00
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s.ts.Init(storage.tb, tsids, tr)
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2019-05-22 23:16:55 +02:00
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if err != nil {
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s.err = err
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2020-08-06 18:17:51 +02:00
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return 0
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2019-05-22 23:16:55 +02:00
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}
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2021-03-22 21:41:47 +01:00
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s.idb = storage.idb()
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2020-08-06 18:17:51 +02:00
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return len(tsids)
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2019-05-22 23:16:55 +02:00
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}
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// MustClose closes the Search.
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func (s *Search) MustClose() {
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if !s.needClosing {
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logger.Panicf("BUG: missing Init call before MustClose")
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}
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s.ts.MustClose()
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s.reset()
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}
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// Error returns the last error from s.
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func (s *Search) Error() error {
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2020-08-10 12:36:00 +02:00
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if s.err == io.EOF || s.err == nil {
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2019-05-22 23:16:55 +02:00
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return nil
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}
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2020-08-10 12:45:44 +02:00
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return fmt.Errorf("error when searching for tagFilters=%s on the time range %s: %w", s.tfss, s.tr.String(), s.err)
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2019-05-22 23:16:55 +02:00
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}
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2020-04-27 07:13:41 +02:00
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// NextMetricBlock proceeds to the next MetricBlockRef.
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2019-05-22 23:16:55 +02:00
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func (s *Search) NextMetricBlock() bool {
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if s.err != nil {
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return false
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}
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for s.ts.NextBlock() {
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2020-08-07 07:37:33 +02:00
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if s.loops&paceLimiterSlowIterationsMask == 0 {
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2020-07-23 19:42:57 +02:00
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if err := checkSearchDeadlineAndPace(s.deadline); err != nil {
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s.err = err
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return false
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}
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2020-07-23 18:21:49 +02:00
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}
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s.loops++
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2020-04-27 07:13:41 +02:00
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tsid := &s.ts.BlockRef.bh.TSID
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2019-05-22 23:16:55 +02:00
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var err error
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2021-03-22 21:41:47 +01:00
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s.MetricBlockRef.MetricName, err = s.idb.searchMetricNameWithCache(s.MetricBlockRef.MetricName[:0], tsid.MetricID, tsid.AccountID, tsid.ProjectID)
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2019-05-22 23:16:55 +02:00
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if err != nil {
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if err == io.EOF {
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2019-12-02 19:44:18 +01:00
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// Skip missing metricName for tsid.MetricID.
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// It should be automatically fixed. See indexDB.searchMetricName for details.
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2019-05-22 23:16:55 +02:00
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continue
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}
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s.err = err
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return false
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}
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2020-04-27 07:13:41 +02:00
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s.MetricBlockRef.BlockRef = s.ts.BlockRef
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2019-05-22 23:16:55 +02:00
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return true
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}
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if err := s.ts.Error(); err != nil {
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s.err = err
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return false
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}
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s.err = io.EOF
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return false
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}
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// SearchQuery is used for sending search queries from vmselect to vmstorage.
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type SearchQuery struct {
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2019-05-22 23:23:23 +02:00
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AccountID uint32
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ProjectID uint32
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2019-05-22 23:16:55 +02:00
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MinTimestamp int64
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MaxTimestamp int64
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TagFilterss [][]TagFilter
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}
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2020-11-16 17:00:50 +01:00
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// NewSearchQuery creates new search query for the given args.
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func NewSearchQuery(accountID, projectID uint32, start, end int64, tagFilterss [][]TagFilter) *SearchQuery {
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return &SearchQuery{
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AccountID: accountID,
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ProjectID: projectID,
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MinTimestamp: start,
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MaxTimestamp: end,
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TagFilterss: tagFilterss,
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}
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}
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2019-05-22 23:16:55 +02:00
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// TagFilter represents a single tag filter from SearchQuery.
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type TagFilter struct {
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Key []byte
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Value []byte
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IsNegative bool
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IsRegexp bool
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}
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// String returns string representation of tf.
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func (tf *TagFilter) String() string {
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var bb bytesutil.ByteBuffer
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fmt.Fprintf(&bb, "{Key=%q, Value=%q, IsNegative: %v, IsRegexp: %v}", tf.Key, tf.Value, tf.IsNegative, tf.IsRegexp)
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return string(bb.B)
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}
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// Marshal appends marshaled tf to dst and returns the result.
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func (tf *TagFilter) Marshal(dst []byte) []byte {
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dst = encoding.MarshalBytes(dst, tf.Key)
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dst = encoding.MarshalBytes(dst, tf.Value)
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x := 0
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if tf.IsNegative {
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x = 2
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}
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if tf.IsRegexp {
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x |= 1
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}
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dst = append(dst, byte(x))
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return dst
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}
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// Unmarshal unmarshals tf from src and returns the tail.
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func (tf *TagFilter) Unmarshal(src []byte) ([]byte, error) {
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tail, k, err := encoding.UnmarshalBytes(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal Key: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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tf.Key = append(tf.Key[:0], k...)
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src = tail
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tail, v, err := encoding.UnmarshalBytes(src)
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if err != nil {
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2020-06-30 21:58:18 +02:00
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return tail, fmt.Errorf("cannot unmarshal Value: %w", err)
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2019-05-22 23:16:55 +02:00
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}
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tf.Value = append(tf.Value[:0], v...)
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src = tail
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if len(src) < 1 {
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return src, fmt.Errorf("cannot unmarshal IsNegative+IsRegexp from empty src")
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}
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x := src[0]
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switch x {
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case 0:
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tf.IsNegative = false
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tf.IsRegexp = false
|
|
|
|
case 1:
|
|
|
|
tf.IsNegative = false
|
|
|
|
tf.IsRegexp = true
|
|
|
|
case 2:
|
|
|
|
tf.IsNegative = true
|
|
|
|
tf.IsRegexp = false
|
|
|
|
case 3:
|
|
|
|
tf.IsNegative = true
|
|
|
|
tf.IsRegexp = true
|
|
|
|
default:
|
|
|
|
return src, fmt.Errorf("unexpected value for IsNegative+IsRegexp: %d; must be in the range [0..3]", x)
|
|
|
|
}
|
|
|
|
src = src[1:]
|
|
|
|
|
|
|
|
return src, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// String returns string representation of the search query.
|
|
|
|
func (sq *SearchQuery) String() string {
|
|
|
|
var bb bytesutil.ByteBuffer
|
2019-05-22 23:23:23 +02:00
|
|
|
fmt.Fprintf(&bb, "AccountID=%d, ProjectID=%d, MinTimestamp=%s, MaxTimestamp=%s, TagFilters=[\n",
|
|
|
|
sq.AccountID, sq.ProjectID, timestampToTime(sq.MinTimestamp), timestampToTime(sq.MaxTimestamp))
|
2019-05-22 23:16:55 +02:00
|
|
|
for _, tagFilters := range sq.TagFilterss {
|
|
|
|
for _, tf := range tagFilters {
|
|
|
|
fmt.Fprintf(&bb, "%s", tf.String())
|
|
|
|
}
|
|
|
|
fmt.Fprintf(&bb, "\n")
|
|
|
|
}
|
|
|
|
fmt.Fprintf(&bb, "]")
|
|
|
|
return string(bb.B)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Marshal appends marshaled sq to dst and returns the result.
|
|
|
|
func (sq *SearchQuery) Marshal(dst []byte) []byte {
|
2019-05-22 23:23:23 +02:00
|
|
|
dst = encoding.MarshalUint32(dst, sq.AccountID)
|
|
|
|
dst = encoding.MarshalUint32(dst, sq.ProjectID)
|
2019-05-22 23:16:55 +02:00
|
|
|
dst = encoding.MarshalVarInt64(dst, sq.MinTimestamp)
|
|
|
|
dst = encoding.MarshalVarInt64(dst, sq.MaxTimestamp)
|
|
|
|
dst = encoding.MarshalVarUint64(dst, uint64(len(sq.TagFilterss)))
|
|
|
|
for _, tagFilters := range sq.TagFilterss {
|
|
|
|
dst = encoding.MarshalVarUint64(dst, uint64(len(tagFilters)))
|
|
|
|
for i := range tagFilters {
|
|
|
|
dst = tagFilters[i].Marshal(dst)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return dst
|
|
|
|
}
|
|
|
|
|
|
|
|
// Unmarshal unmarshals sq from src and returns the tail.
|
|
|
|
func (sq *SearchQuery) Unmarshal(src []byte) ([]byte, error) {
|
2019-05-22 23:23:23 +02:00
|
|
|
if len(src) < 4 {
|
|
|
|
return src, fmt.Errorf("cannot unmarshal AccountID: too short src len: %d; must be at least %d bytes", len(src), 4)
|
|
|
|
}
|
|
|
|
sq.AccountID = encoding.UnmarshalUint32(src)
|
|
|
|
src = src[4:]
|
|
|
|
|
|
|
|
if len(src) < 4 {
|
|
|
|
return src, fmt.Errorf("cannot unmarshal ProjectID: too short src len: %d; must be at least %d bytes", len(src), 4)
|
|
|
|
}
|
|
|
|
sq.ProjectID = encoding.UnmarshalUint32(src)
|
|
|
|
src = src[4:]
|
|
|
|
|
2019-05-22 23:16:55 +02:00
|
|
|
tail, minTs, err := encoding.UnmarshalVarInt64(src)
|
|
|
|
if err != nil {
|
2020-06-30 21:58:18 +02:00
|
|
|
return src, fmt.Errorf("cannot unmarshal MinTimestamp: %w", err)
|
2019-05-22 23:16:55 +02:00
|
|
|
}
|
|
|
|
sq.MinTimestamp = minTs
|
|
|
|
src = tail
|
|
|
|
|
|
|
|
tail, maxTs, err := encoding.UnmarshalVarInt64(src)
|
|
|
|
if err != nil {
|
2020-06-30 21:58:18 +02:00
|
|
|
return src, fmt.Errorf("cannot unmarshal MaxTimestamp: %w", err)
|
2019-05-22 23:16:55 +02:00
|
|
|
}
|
|
|
|
sq.MaxTimestamp = maxTs
|
|
|
|
src = tail
|
|
|
|
|
|
|
|
tail, tfssCount, err := encoding.UnmarshalVarUint64(src)
|
|
|
|
if err != nil {
|
2020-06-30 21:58:18 +02:00
|
|
|
return src, fmt.Errorf("cannot unmarshal the count of TagFilterss: %w", err)
|
2019-05-22 23:16:55 +02:00
|
|
|
}
|
|
|
|
if n := int(tfssCount) - cap(sq.TagFilterss); n > 0 {
|
|
|
|
sq.TagFilterss = append(sq.TagFilterss[:cap(sq.TagFilterss)], make([][]TagFilter, n)...)
|
|
|
|
}
|
|
|
|
sq.TagFilterss = sq.TagFilterss[:tfssCount]
|
|
|
|
src = tail
|
|
|
|
|
|
|
|
for i := 0; i < int(tfssCount); i++ {
|
|
|
|
tail, tfsCount, err := encoding.UnmarshalVarUint64(src)
|
|
|
|
if err != nil {
|
2020-06-30 21:58:18 +02:00
|
|
|
return src, fmt.Errorf("cannot unmarshal the count of TagFilters: %w", err)
|
2019-05-22 23:16:55 +02:00
|
|
|
}
|
|
|
|
src = tail
|
|
|
|
|
|
|
|
tagFilters := sq.TagFilterss[i]
|
|
|
|
if n := int(tfsCount) - cap(tagFilters); n > 0 {
|
|
|
|
tagFilters = append(tagFilters[:cap(tagFilters)], make([]TagFilter, n)...)
|
|
|
|
}
|
|
|
|
tagFilters = tagFilters[:tfsCount]
|
|
|
|
for j := 0; j < int(tfsCount); j++ {
|
|
|
|
tail, err := tagFilters[j].Unmarshal(src)
|
|
|
|
if err != nil {
|
2020-06-30 21:58:18 +02:00
|
|
|
return tail, fmt.Errorf("cannot unmarshal TagFilter #%d: %w", j, err)
|
2019-05-22 23:16:55 +02:00
|
|
|
}
|
|
|
|
src = tail
|
|
|
|
}
|
|
|
|
sq.TagFilterss[i] = tagFilters
|
|
|
|
}
|
|
|
|
|
|
|
|
return src, nil
|
|
|
|
}
|
2020-07-23 19:42:57 +02:00
|
|
|
|
|
|
|
func checkSearchDeadlineAndPace(deadline uint64) error {
|
|
|
|
if fasttime.UnixTimestamp() > deadline {
|
2020-08-10 12:17:12 +02:00
|
|
|
return ErrDeadlineExceeded
|
2020-07-23 19:42:57 +02:00
|
|
|
}
|
|
|
|
storagepacelimiter.Search.WaitIfNeeded()
|
|
|
|
return nil
|
|
|
|
}
|
2020-08-07 07:37:33 +02:00
|
|
|
|
|
|
|
const (
|
|
|
|
paceLimiterFastIterationsMask = 1<<16 - 1
|
|
|
|
paceLimiterMediumIterationsMask = 1<<14 - 1
|
|
|
|
paceLimiterSlowIterationsMask = 1<<12 - 1
|
|
|
|
)
|