mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-24 03:06:48 +01:00
936 lines
26 KiB
Go
936 lines
26 KiB
Go
package netstorage
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import (
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"container/heap"
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"errors"
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"flag"
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"fmt"
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"regexp"
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"runtime"
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"sort"
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"sync"
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"sync/atomic"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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maxTagKeysPerSearch = flag.Int("search.maxTagKeys", 100e3, "The maximum number of tag keys returned from /api/v1/labels")
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maxTagValuesPerSearch = flag.Int("search.maxTagValues", 100e3, "The maximum number of tag values returned from /api/v1/label/<label_name>/values")
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maxTagValueSuffixesPerSearch = flag.Int("search.maxTagValueSuffixesPerSearch", 100e3, "The maximum number of tag value suffixes returned from /metrics/find")
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maxMetricsPerSearch = flag.Int("search.maxUniqueTimeseries", 300e3, "The maximum number of unique time series each search can scan")
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)
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// Result is a single timeseries result.
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//
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// ProcessSearchQuery returns Result slice.
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type Result struct {
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// The name of the metric.
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MetricName storage.MetricName
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// Values are sorted by Timestamps.
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Values []float64
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Timestamps []int64
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// Marshaled MetricName. Used only for results sorting
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// in app/vmselect/promql
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MetricNameMarshaled []byte
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}
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func (r *Result) reset() {
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r.MetricName.Reset()
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r.Values = r.Values[:0]
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r.Timestamps = r.Timestamps[:0]
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r.MetricNameMarshaled = r.MetricNameMarshaled[:0]
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}
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// Results holds results returned from ProcessSearchQuery.
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type Results struct {
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tr storage.TimeRange
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fetchData bool
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deadline searchutils.Deadline
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packedTimeseries []packedTimeseries
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sr *storage.Search
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tbf *tmpBlocksFile
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}
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// Len returns the number of results in rss.
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func (rss *Results) Len() int {
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return len(rss.packedTimeseries)
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}
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// Cancel cancels rss work.
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func (rss *Results) Cancel() {
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rss.mustClose()
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}
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func (rss *Results) mustClose() {
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putStorageSearch(rss.sr)
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rss.sr = nil
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putTmpBlocksFile(rss.tbf)
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rss.tbf = nil
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}
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var timeseriesWorkCh = make(chan *timeseriesWork, gomaxprocs*16)
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type timeseriesWork struct {
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mustStop uint64
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rss *Results
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pts *packedTimeseries
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f func(rs *Result, workerID uint) error
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doneCh chan error
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rowsProcessed int
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}
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func init() {
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for i := 0; i < gomaxprocs; i++ {
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go timeseriesWorker(uint(i))
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}
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}
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func timeseriesWorker(workerID uint) {
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var rs Result
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var rsLastResetTime uint64
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for tsw := range timeseriesWorkCh {
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rss := tsw.rss
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if rss.deadline.Exceeded() {
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tsw.doneCh <- fmt.Errorf("timeout exceeded during query execution: %s", rss.deadline.String())
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continue
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}
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if atomic.LoadUint64(&tsw.mustStop) != 0 {
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tsw.doneCh <- nil
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continue
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}
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if err := tsw.pts.Unpack(&rs, rss.tbf, rss.tr, rss.fetchData); err != nil {
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tsw.doneCh <- fmt.Errorf("error during time series unpacking: %w", err)
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continue
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}
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if len(rs.Timestamps) > 0 || !rss.fetchData {
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if err := tsw.f(&rs, workerID); err != nil {
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tsw.doneCh <- err
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continue
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}
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}
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tsw.rowsProcessed = len(rs.Values)
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tsw.doneCh <- nil
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currentTime := fasttime.UnixTimestamp()
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if cap(rs.Values) > 1024*1024 && 4*len(rs.Values) < cap(rs.Values) && currentTime-rsLastResetTime > 10 {
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// Reset rs in order to preseve memory usage after processing big time series with millions of rows.
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rs = Result{}
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rsLastResetTime = currentTime
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}
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}
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}
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// RunParallel runs f in parallel for all the results from rss.
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//
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// f shouldn't hold references to rs after returning.
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// workerID is the id of the worker goroutine that calls f.
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// Data processing is immediately stopped if f returns non-nil error.
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//
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// rss becomes unusable after the call to RunParallel.
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func (rss *Results) RunParallel(f func(rs *Result, workerID uint) error) error {
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defer rss.mustClose()
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// Feed workers with work.
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tsws := make([]*timeseriesWork, len(rss.packedTimeseries))
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for i := range rss.packedTimeseries {
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tsw := ×eriesWork{
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rss: rss,
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pts: &rss.packedTimeseries[i],
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f: f,
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doneCh: make(chan error, 1),
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}
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timeseriesWorkCh <- tsw
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tsws[i] = tsw
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}
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seriesProcessedTotal := len(rss.packedTimeseries)
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rss.packedTimeseries = rss.packedTimeseries[:0]
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// Wait until work is complete.
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var firstErr error
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rowsProcessedTotal := 0
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for _, tsw := range tsws {
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if err := <-tsw.doneCh; err != nil && firstErr == nil {
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// Return just the first error, since other errors
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// are likely duplicate the first error.
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firstErr = err
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// Notify all the the tsws that they shouldn't be executed.
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for _, tsw := range tsws {
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atomic.StoreUint64(&tsw.mustStop, 1)
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}
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}
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rowsProcessedTotal += tsw.rowsProcessed
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}
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perQueryRowsProcessed.Update(float64(rowsProcessedTotal))
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perQuerySeriesProcessed.Update(float64(seriesProcessedTotal))
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return firstErr
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}
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var perQueryRowsProcessed = metrics.NewHistogram(`vm_per_query_rows_processed_count`)
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var perQuerySeriesProcessed = metrics.NewHistogram(`vm_per_query_series_processed_count`)
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var gomaxprocs = runtime.GOMAXPROCS(-1)
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type packedTimeseries struct {
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metricName string
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brs []blockRef
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}
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var unpackWorkCh = make(chan *unpackWork, gomaxprocs*128)
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type unpackWorkItem struct {
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br blockRef
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tr storage.TimeRange
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}
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type unpackWork struct {
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tbf *tmpBlocksFile
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ws []unpackWorkItem
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sbs []*sortBlock
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doneCh chan error
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}
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func (upw *unpackWork) reset() {
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upw.tbf = nil
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ws := upw.ws
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for i := range ws {
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w := &ws[i]
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w.br = blockRef{}
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w.tr = storage.TimeRange{}
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}
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upw.ws = upw.ws[:0]
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sbs := upw.sbs
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for i := range sbs {
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sbs[i] = nil
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}
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upw.sbs = upw.sbs[:0]
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if n := len(upw.doneCh); n > 0 {
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logger.Panicf("BUG: upw.doneCh must be empty; it contains %d items now", n)
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}
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}
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func (upw *unpackWork) unpack(tmpBlock *storage.Block) {
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for _, w := range upw.ws {
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sb := getSortBlock()
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if err := sb.unpackFrom(tmpBlock, upw.tbf, w.br, w.tr); err != nil {
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putSortBlock(sb)
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upw.doneCh <- fmt.Errorf("cannot unpack block: %w", err)
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return
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}
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upw.sbs = append(upw.sbs, sb)
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}
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upw.doneCh <- nil
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}
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func getUnpackWork() *unpackWork {
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v := unpackWorkPool.Get()
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if v != nil {
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return v.(*unpackWork)
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}
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return &unpackWork{
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doneCh: make(chan error, 1),
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}
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}
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func putUnpackWork(upw *unpackWork) {
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upw.reset()
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unpackWorkPool.Put(upw)
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}
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var unpackWorkPool sync.Pool
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func init() {
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for i := 0; i < gomaxprocs; i++ {
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go unpackWorker()
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}
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}
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func unpackWorker() {
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var tmpBlock storage.Block
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for upw := range unpackWorkCh {
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upw.unpack(&tmpBlock)
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}
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}
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// unpackBatchSize is the maximum number of blocks that may be unpacked at once by a single goroutine.
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//
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// This batch is needed in order to reduce contention for upackWorkCh in multi-CPU system.
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var unpackBatchSize = 8 * runtime.GOMAXPROCS(-1)
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// Unpack unpacks pts to dst.
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func (pts *packedTimeseries) Unpack(dst *Result, tbf *tmpBlocksFile, tr storage.TimeRange, fetchData bool) error {
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dst.reset()
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if err := dst.MetricName.Unmarshal(bytesutil.ToUnsafeBytes(pts.metricName)); err != nil {
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return fmt.Errorf("cannot unmarshal metricName %q: %w", pts.metricName, err)
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}
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if !fetchData {
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// Do not spend resources on data reading and unpacking.
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return nil
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}
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// Feed workers with work
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brsLen := len(pts.brs)
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upws := make([]*unpackWork, 0, 1+brsLen/unpackBatchSize)
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upw := getUnpackWork()
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upw.tbf = tbf
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for _, br := range pts.brs {
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if len(upw.ws) >= unpackBatchSize {
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unpackWorkCh <- upw
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upws = append(upws, upw)
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upw = getUnpackWork()
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upw.tbf = tbf
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}
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upw.ws = append(upw.ws, unpackWorkItem{
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br: br,
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tr: tr,
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})
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}
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unpackWorkCh <- upw
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upws = append(upws, upw)
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pts.brs = pts.brs[:0]
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// Wait until work is complete
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sbs := make([]*sortBlock, 0, brsLen)
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var firstErr error
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for _, upw := range upws {
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if err := <-upw.doneCh; err != nil && firstErr == nil {
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// Return the first error only, since other errors are likely the same.
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firstErr = err
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}
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if firstErr == nil {
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sbs = append(sbs, upw.sbs...)
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} else {
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for _, sb := range upw.sbs {
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putSortBlock(sb)
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}
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}
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putUnpackWork(upw)
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}
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if firstErr != nil {
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return firstErr
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}
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mergeSortBlocks(dst, sbs)
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return nil
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}
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func getSortBlock() *sortBlock {
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v := sbPool.Get()
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if v == nil {
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return &sortBlock{}
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}
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return v.(*sortBlock)
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}
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func putSortBlock(sb *sortBlock) {
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sb.reset()
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sbPool.Put(sb)
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}
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var sbPool sync.Pool
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var metricRowsSkipped = metrics.NewCounter(`vm_metric_rows_skipped_total{name="vmselect"}`)
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func mergeSortBlocks(dst *Result, sbh sortBlocksHeap) {
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// Skip empty sort blocks, since they cannot be passed to heap.Init.
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src := sbh
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sbh = sbh[:0]
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for _, sb := range src {
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if len(sb.Timestamps) == 0 {
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putSortBlock(sb)
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continue
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}
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sbh = append(sbh, sb)
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}
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if len(sbh) == 0 {
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return
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}
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heap.Init(&sbh)
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for {
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top := sbh[0]
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heap.Pop(&sbh)
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if len(sbh) == 0 {
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dst.Timestamps = append(dst.Timestamps, top.Timestamps[top.NextIdx:]...)
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dst.Values = append(dst.Values, top.Values[top.NextIdx:]...)
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putSortBlock(top)
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break
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}
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sbNext := sbh[0]
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tsNext := sbNext.Timestamps[sbNext.NextIdx]
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idxNext := len(top.Timestamps)
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if top.Timestamps[idxNext-1] > tsNext {
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idxNext = top.NextIdx
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for top.Timestamps[idxNext] <= tsNext {
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idxNext++
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}
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}
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dst.Timestamps = append(dst.Timestamps, top.Timestamps[top.NextIdx:idxNext]...)
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dst.Values = append(dst.Values, top.Values[top.NextIdx:idxNext]...)
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if idxNext < len(top.Timestamps) {
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top.NextIdx = idxNext
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heap.Push(&sbh, top)
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} else {
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// Return top to the pool.
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putSortBlock(top)
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}
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}
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timestamps, values := storage.DeduplicateSamples(dst.Timestamps, dst.Values)
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dedups := len(dst.Timestamps) - len(timestamps)
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dedupsDuringSelect.Add(dedups)
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dst.Timestamps = timestamps
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dst.Values = values
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}
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var dedupsDuringSelect = metrics.NewCounter(`vm_deduplicated_samples_total{type="select"}`)
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type sortBlock struct {
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Timestamps []int64
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Values []float64
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NextIdx int
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}
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func (sb *sortBlock) reset() {
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sb.Timestamps = sb.Timestamps[:0]
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sb.Values = sb.Values[:0]
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sb.NextIdx = 0
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}
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func (sb *sortBlock) unpackFrom(tmpBlock *storage.Block, tbf *tmpBlocksFile, br blockRef, tr storage.TimeRange) error {
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tmpBlock.Reset()
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brReal := tbf.MustReadBlockRefAt(br.partRef, br.addr)
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brReal.MustReadBlock(tmpBlock, true)
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if err := tmpBlock.UnmarshalData(); err != nil {
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return fmt.Errorf("cannot unmarshal block: %w", err)
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}
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sb.Timestamps, sb.Values = tmpBlock.AppendRowsWithTimeRangeFilter(sb.Timestamps[:0], sb.Values[:0], tr)
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skippedRows := tmpBlock.RowsCount() - len(sb.Timestamps)
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metricRowsSkipped.Add(skippedRows)
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return nil
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}
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type sortBlocksHeap []*sortBlock
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func (sbh sortBlocksHeap) Len() int {
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return len(sbh)
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}
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func (sbh sortBlocksHeap) Less(i, j int) bool {
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a := sbh[i]
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b := sbh[j]
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return a.Timestamps[a.NextIdx] < b.Timestamps[b.NextIdx]
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}
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func (sbh sortBlocksHeap) Swap(i, j int) {
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sbh[i], sbh[j] = sbh[j], sbh[i]
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}
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func (sbh *sortBlocksHeap) Push(x interface{}) {
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*sbh = append(*sbh, x.(*sortBlock))
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}
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func (sbh *sortBlocksHeap) Pop() interface{} {
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a := *sbh
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v := a[len(a)-1]
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*sbh = a[:len(a)-1]
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return v
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}
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|
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// DeleteSeries deletes time series matching the given tagFilterss.
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func DeleteSeries(sq *storage.SearchQuery) (int, error) {
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tfss, err := setupTfss(sq.TagFilterss)
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if err != nil {
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return 0, err
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}
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return vmstorage.DeleteMetrics(tfss)
|
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}
|
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|
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// GetLabelsOnTimeRange returns labels for the given tr until the given deadline.
|
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func GetLabelsOnTimeRange(tr storage.TimeRange, deadline searchutils.Deadline) ([]string, error) {
|
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if deadline.Exceeded() {
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return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
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}
|
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labels, err := vmstorage.SearchTagKeysOnTimeRange(tr, *maxTagKeysPerSearch, deadline.Deadline())
|
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if err != nil {
|
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return nil, fmt.Errorf("error during labels search on time range: %w", err)
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}
|
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// Substitute "" with "__name__"
|
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for i := range labels {
|
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if labels[i] == "" {
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labels[i] = "__name__"
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}
|
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}
|
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// Sort labels like Prometheus does
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sort.Strings(labels)
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return labels, nil
|
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}
|
|
|
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// GetGraphiteTags returns Graphite tags until the given deadline.
|
|
func GetGraphiteTags(filter string, limit int, deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
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return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
labels, err := GetLabels(deadline)
|
|
if err != nil {
|
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return nil, err
|
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}
|
|
// Substitute "__name__" with "name" for Graphite compatibility
|
|
for i := range labels {
|
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if labels[i] == "__name__" {
|
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labels[i] = "name"
|
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sort.Strings(labels)
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break
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}
|
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}
|
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if len(filter) > 0 {
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labels, err = applyGraphiteRegexpFilter(filter, labels)
|
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if err != nil {
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return nil, err
|
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}
|
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}
|
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if limit > 0 && limit < len(labels) {
|
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labels = labels[:limit]
|
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}
|
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return labels, nil
|
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}
|
|
|
|
// GetLabels returns labels until the given deadline.
|
|
func GetLabels(deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
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labels, err := vmstorage.SearchTagKeys(*maxTagKeysPerSearch, deadline.Deadline())
|
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if err != nil {
|
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return nil, fmt.Errorf("error during labels search: %w", err)
|
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}
|
|
// Substitute "" with "__name__"
|
|
for i := range labels {
|
|
if labels[i] == "" {
|
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labels[i] = "__name__"
|
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}
|
|
}
|
|
// Sort labels like Prometheus does
|
|
sort.Strings(labels)
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return labels, nil
|
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}
|
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|
|
// GetLabelValuesOnTimeRange returns label values for the given labelName on the given tr
|
|
// until the given deadline.
|
|
func GetLabelValuesOnTimeRange(labelName string, tr storage.TimeRange, deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
if labelName == "__name__" {
|
|
labelName = ""
|
|
}
|
|
// Search for tag values
|
|
labelValues, err := vmstorage.SearchTagValuesOnTimeRange([]byte(labelName), tr, *maxTagValuesPerSearch, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error during label values search on time range for labelName=%q: %w", labelName, err)
|
|
}
|
|
// Sort labelValues like Prometheus does
|
|
sort.Strings(labelValues)
|
|
return labelValues, nil
|
|
}
|
|
|
|
// GetGraphiteTagValues returns tag values for the given tagName until the given deadline.
|
|
func GetGraphiteTagValues(tagName, filter string, limit int, deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
if tagName == "name" {
|
|
tagName = ""
|
|
}
|
|
tagValues, err := GetLabelValues(tagName, deadline)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(filter) > 0 {
|
|
tagValues, err = applyGraphiteRegexpFilter(filter, tagValues)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if limit > 0 && limit < len(tagValues) {
|
|
tagValues = tagValues[:limit]
|
|
}
|
|
return tagValues, nil
|
|
}
|
|
|
|
// GetLabelValues returns label values for the given labelName
|
|
// until the given deadline.
|
|
func GetLabelValues(labelName string, deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
if labelName == "__name__" {
|
|
labelName = ""
|
|
}
|
|
// Search for tag values
|
|
labelValues, err := vmstorage.SearchTagValues([]byte(labelName), *maxTagValuesPerSearch, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error during label values search for labelName=%q: %w", labelName, err)
|
|
}
|
|
// Sort labelValues like Prometheus does
|
|
sort.Strings(labelValues)
|
|
return labelValues, nil
|
|
}
|
|
|
|
// GetTagValueSuffixes returns tag value suffixes for the given tagKey and the given tagValuePrefix.
|
|
//
|
|
// It can be used for implementing https://graphite-api.readthedocs.io/en/latest/api.html#metrics-find
|
|
func GetTagValueSuffixes(tr storage.TimeRange, tagKey, tagValuePrefix string, delimiter byte, deadline searchutils.Deadline) ([]string, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
suffixes, err := vmstorage.SearchTagValueSuffixes(tr, []byte(tagKey), []byte(tagValuePrefix), delimiter, *maxTagValueSuffixesPerSearch, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error during search for suffixes for tagKey=%q, tagValuePrefix=%q, delimiter=%c on time range %s: %w",
|
|
tagKey, tagValuePrefix, delimiter, tr.String(), err)
|
|
}
|
|
return suffixes, nil
|
|
}
|
|
|
|
// GetLabelEntries returns all the label entries until the given deadline.
|
|
func GetLabelEntries(deadline searchutils.Deadline) ([]storage.TagEntry, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
labelEntries, err := vmstorage.SearchTagEntries(*maxTagKeysPerSearch, *maxTagValuesPerSearch, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error during label entries request: %w", err)
|
|
}
|
|
|
|
// Substitute "" with "__name__"
|
|
for i := range labelEntries {
|
|
e := &labelEntries[i]
|
|
if e.Key == "" {
|
|
e.Key = "__name__"
|
|
}
|
|
}
|
|
|
|
// Sort labelEntries by the number of label values in each entry.
|
|
sort.Slice(labelEntries, func(i, j int) bool {
|
|
a, b := labelEntries[i].Values, labelEntries[j].Values
|
|
if len(a) != len(b) {
|
|
return len(a) > len(b)
|
|
}
|
|
return labelEntries[i].Key > labelEntries[j].Key
|
|
})
|
|
|
|
return labelEntries, nil
|
|
}
|
|
|
|
// GetTSDBStatusForDate returns tsdb status according to https://prometheus.io/docs/prometheus/latest/querying/api/#tsdb-stats
|
|
func GetTSDBStatusForDate(deadline searchutils.Deadline, date uint64, topN int) (*storage.TSDBStatus, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
status, err := vmstorage.GetTSDBStatusForDate(date, topN, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error during tsdb status request: %w", err)
|
|
}
|
|
return status, nil
|
|
}
|
|
|
|
// GetSeriesCount returns the number of unique series.
|
|
func GetSeriesCount(deadline searchutils.Deadline) (uint64, error) {
|
|
if deadline.Exceeded() {
|
|
return 0, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
n, err := vmstorage.GetSeriesCount(deadline.Deadline())
|
|
if err != nil {
|
|
return 0, fmt.Errorf("error during series count request: %w", err)
|
|
}
|
|
return n, nil
|
|
}
|
|
|
|
func getStorageSearch() *storage.Search {
|
|
v := ssPool.Get()
|
|
if v == nil {
|
|
return &storage.Search{}
|
|
}
|
|
return v.(*storage.Search)
|
|
}
|
|
|
|
func putStorageSearch(sr *storage.Search) {
|
|
sr.MustClose()
|
|
ssPool.Put(sr)
|
|
}
|
|
|
|
var ssPool sync.Pool
|
|
|
|
// ExportBlocks searches for time series matching sq and calls f for each found block.
|
|
//
|
|
// f is called in parallel from multiple goroutines.
|
|
// Data processing is immediately stopped if f returns non-nil error.
|
|
// It is the responsibility of f to call b.UnmarshalData before reading timestamps and values from the block.
|
|
// It is the responsibility of f to filter blocks according to the given tr.
|
|
func ExportBlocks(sq *storage.SearchQuery, deadline searchutils.Deadline, f func(mn *storage.MetricName, b *storage.Block, tr storage.TimeRange) error) error {
|
|
if deadline.Exceeded() {
|
|
return fmt.Errorf("timeout exceeded before starting data export: %s", deadline.String())
|
|
}
|
|
tfss, err := setupTfss(sq.TagFilterss)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
tr := storage.TimeRange{
|
|
MinTimestamp: sq.MinTimestamp,
|
|
MaxTimestamp: sq.MaxTimestamp,
|
|
}
|
|
if err := vmstorage.CheckTimeRange(tr); err != nil {
|
|
return err
|
|
}
|
|
|
|
vmstorage.WG.Add(1)
|
|
defer vmstorage.WG.Done()
|
|
|
|
sr := getStorageSearch()
|
|
defer putStorageSearch(sr)
|
|
sr.Init(vmstorage.Storage, tfss, tr, *maxMetricsPerSearch, deadline.Deadline())
|
|
|
|
// Start workers that call f in parallel on available CPU cores.
|
|
gomaxprocs := runtime.GOMAXPROCS(-1)
|
|
workCh := make(chan *exportWork, gomaxprocs*8)
|
|
var (
|
|
errGlobal error
|
|
errGlobalLock sync.Mutex
|
|
mustStop uint32
|
|
)
|
|
var wg sync.WaitGroup
|
|
wg.Add(gomaxprocs)
|
|
for i := 0; i < gomaxprocs; i++ {
|
|
go func() {
|
|
defer wg.Done()
|
|
for xw := range workCh {
|
|
if err := f(&xw.mn, &xw.b, tr); err != nil {
|
|
errGlobalLock.Lock()
|
|
if errGlobal != nil {
|
|
errGlobal = err
|
|
atomic.StoreUint32(&mustStop, 1)
|
|
}
|
|
errGlobalLock.Unlock()
|
|
}
|
|
xw.reset()
|
|
exportWorkPool.Put(xw)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// Feed workers with work
|
|
blocksRead := 0
|
|
for sr.NextMetricBlock() {
|
|
blocksRead++
|
|
if deadline.Exceeded() {
|
|
return fmt.Errorf("timeout exceeded while fetching data block #%d from storage: %s", blocksRead, deadline.String())
|
|
}
|
|
if atomic.LoadUint32(&mustStop) != 0 {
|
|
break
|
|
}
|
|
xw := exportWorkPool.Get().(*exportWork)
|
|
if err := xw.mn.Unmarshal(sr.MetricBlockRef.MetricName); err != nil {
|
|
return fmt.Errorf("cannot unmarshal metricName for block #%d: %w", blocksRead, err)
|
|
}
|
|
sr.MetricBlockRef.BlockRef.MustReadBlock(&xw.b, true)
|
|
workCh <- xw
|
|
}
|
|
close(workCh)
|
|
|
|
// Wait for workers to finish.
|
|
wg.Wait()
|
|
|
|
// Check errors.
|
|
err = sr.Error()
|
|
if err == nil {
|
|
err = errGlobal
|
|
}
|
|
if err != nil {
|
|
if errors.Is(err, storage.ErrDeadlineExceeded) {
|
|
return fmt.Errorf("timeout exceeded during the query: %s", deadline.String())
|
|
}
|
|
return fmt.Errorf("search error after reading %d data blocks: %w", blocksRead, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type exportWork struct {
|
|
mn storage.MetricName
|
|
b storage.Block
|
|
}
|
|
|
|
func (xw *exportWork) reset() {
|
|
xw.mn.Reset()
|
|
xw.b.Reset()
|
|
}
|
|
|
|
var exportWorkPool = &sync.Pool{
|
|
New: func() interface{} {
|
|
return &exportWork{}
|
|
},
|
|
}
|
|
|
|
// SearchMetricNames returns all the metric names matching sq until the given deadline.
|
|
func SearchMetricNames(sq *storage.SearchQuery, deadline searchutils.Deadline) ([]storage.MetricName, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting to search metric names: %s", deadline.String())
|
|
}
|
|
|
|
// Setup search.
|
|
tfss, err := setupTfss(sq.TagFilterss)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tr := storage.TimeRange{
|
|
MinTimestamp: sq.MinTimestamp,
|
|
MaxTimestamp: sq.MaxTimestamp,
|
|
}
|
|
if err := vmstorage.CheckTimeRange(tr); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mns, err := vmstorage.SearchMetricNames(tfss, tr, *maxMetricsPerSearch, deadline.Deadline())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot find metric names: %w", err)
|
|
}
|
|
return mns, nil
|
|
}
|
|
|
|
// ProcessSearchQuery performs sq until the given deadline.
|
|
//
|
|
// Results.RunParallel or Results.Cancel must be called on the returned Results.
|
|
func ProcessSearchQuery(sq *storage.SearchQuery, fetchData bool, deadline searchutils.Deadline) (*Results, error) {
|
|
if deadline.Exceeded() {
|
|
return nil, fmt.Errorf("timeout exceeded before starting the query processing: %s", deadline.String())
|
|
}
|
|
|
|
// Setup search.
|
|
tfss, err := setupTfss(sq.TagFilterss)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tr := storage.TimeRange{
|
|
MinTimestamp: sq.MinTimestamp,
|
|
MaxTimestamp: sq.MaxTimestamp,
|
|
}
|
|
if err := vmstorage.CheckTimeRange(tr); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
vmstorage.WG.Add(1)
|
|
defer vmstorage.WG.Done()
|
|
|
|
sr := getStorageSearch()
|
|
maxSeriesCount := sr.Init(vmstorage.Storage, tfss, tr, *maxMetricsPerSearch, deadline.Deadline())
|
|
m := make(map[string][]blockRef, maxSeriesCount)
|
|
orderedMetricNames := make([]string, 0, maxSeriesCount)
|
|
blocksRead := 0
|
|
tbf := getTmpBlocksFile()
|
|
var buf []byte
|
|
for sr.NextMetricBlock() {
|
|
blocksRead++
|
|
if deadline.Exceeded() {
|
|
putTmpBlocksFile(tbf)
|
|
putStorageSearch(sr)
|
|
return nil, fmt.Errorf("timeout exceeded while fetching data block #%d from storage: %s", blocksRead, deadline.String())
|
|
}
|
|
buf = sr.MetricBlockRef.BlockRef.Marshal(buf[:0])
|
|
addr, err := tbf.WriteBlockRefData(buf)
|
|
if err != nil {
|
|
putTmpBlocksFile(tbf)
|
|
putStorageSearch(sr)
|
|
return nil, fmt.Errorf("cannot write %d bytes to temporary file: %w", len(buf), err)
|
|
}
|
|
metricName := sr.MetricBlockRef.MetricName
|
|
brs := m[string(metricName)]
|
|
brs = append(brs, blockRef{
|
|
partRef: sr.MetricBlockRef.BlockRef.PartRef(),
|
|
addr: addr,
|
|
})
|
|
if len(brs) > 1 {
|
|
// An optimization: do not allocate a string for already existing metricName key in m
|
|
m[string(metricName)] = brs
|
|
} else {
|
|
// An optimization for big number of time series with long metricName values:
|
|
// use only a single copy of metricName for both orderedMetricNames and m.
|
|
orderedMetricNames = append(orderedMetricNames, string(metricName))
|
|
m[orderedMetricNames[len(orderedMetricNames)-1]] = brs
|
|
}
|
|
}
|
|
if err := sr.Error(); err != nil {
|
|
putTmpBlocksFile(tbf)
|
|
putStorageSearch(sr)
|
|
if errors.Is(err, storage.ErrDeadlineExceeded) {
|
|
return nil, fmt.Errorf("timeout exceeded during the query: %s", deadline.String())
|
|
}
|
|
return nil, fmt.Errorf("search error after reading %d data blocks: %w", blocksRead, err)
|
|
}
|
|
if err := tbf.Finalize(); err != nil {
|
|
putTmpBlocksFile(tbf)
|
|
putStorageSearch(sr)
|
|
return nil, fmt.Errorf("cannot finalize temporary file: %w", err)
|
|
}
|
|
|
|
var rss Results
|
|
rss.tr = tr
|
|
rss.fetchData = fetchData
|
|
rss.deadline = deadline
|
|
pts := make([]packedTimeseries, len(orderedMetricNames))
|
|
for i, metricName := range orderedMetricNames {
|
|
pts[i] = packedTimeseries{
|
|
metricName: metricName,
|
|
brs: m[metricName],
|
|
}
|
|
}
|
|
rss.packedTimeseries = pts
|
|
rss.sr = sr
|
|
rss.tbf = tbf
|
|
return &rss, nil
|
|
}
|
|
|
|
type blockRef struct {
|
|
partRef storage.PartRef
|
|
addr tmpBlockAddr
|
|
}
|
|
|
|
func setupTfss(tagFilterss [][]storage.TagFilter) ([]*storage.TagFilters, error) {
|
|
tfss := make([]*storage.TagFilters, 0, len(tagFilterss))
|
|
for _, tagFilters := range tagFilterss {
|
|
tfs := storage.NewTagFilters()
|
|
for i := range tagFilters {
|
|
tf := &tagFilters[i]
|
|
if err := tfs.Add(tf.Key, tf.Value, tf.IsNegative, tf.IsRegexp); err != nil {
|
|
return nil, fmt.Errorf("cannot parse tag filter %s: %w", tf, err)
|
|
}
|
|
}
|
|
tfss = append(tfss, tfs)
|
|
tfss = append(tfss, tfs.Finalize()...)
|
|
}
|
|
return tfss, nil
|
|
}
|
|
|
|
func applyGraphiteRegexpFilter(filter string, ss []string) ([]string, error) {
|
|
// Anchor filter regexp to the beginning of the string as Graphite does.
|
|
// See https://github.com/graphite-project/graphite-web/blob/3ad279df5cb90b211953e39161df416e54a84948/webapp/graphite/tags/localdatabase.py#L157
|
|
filter = "^(?:" + filter + ")"
|
|
re, err := regexp.Compile(filter)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot parse regexp filter=%q: %w", filter, err)
|
|
}
|
|
dst := ss[:0]
|
|
for _, s := range ss {
|
|
if re.MatchString(s) {
|
|
dst = append(dst, s)
|
|
}
|
|
}
|
|
return dst, nil
|
|
}
|