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prometheus/tsdb/querier_test.go
Ganesh Vernekar 1c99adb9fd
Callbacks for lifecycle of series in TSDB (#7159) 
* Callbacks for lifecycle of series in TSDB

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Add more comments

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2020-05-20 18:52:08 +05:30

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// Copyright 2017 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tsdb
import (
"context"
"fmt"
"io/ioutil"
"math"
"math/rand"
"os"
"path/filepath"
"sort"
"strconv"
"testing"
"github.com/pkg/errors"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/storage"
"github.com/prometheus/prometheus/tsdb/chunkenc"
"github.com/prometheus/prometheus/tsdb/chunks"
"github.com/prometheus/prometheus/tsdb/index"
"github.com/prometheus/prometheus/tsdb/tombstones"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/util/testutil"
)
type mockSeriesSet struct {
next func() bool
series func() storage.Series
err func() error
}
func (m *mockSeriesSet) Next() bool { return m.next() }
func (m *mockSeriesSet) At() storage.Series { return m.series() }
func (m *mockSeriesSet) Err() error { return m.err() }
func newMockSeriesSet(list []storage.Series) *mockSeriesSet {
i := -1
return &mockSeriesSet{
next: func() bool {
i++
return i < len(list)
},
series: func() storage.Series {
return list[i]
},
err: func() error { return nil },
}
}
func TestMergedSeriesSet(t *testing.T) {
cases := []struct {
// The input sets in order (samples in series in b are strictly
// after those in a).
a, b storage.SeriesSet
// The composition of a and b in the partition series set must yield
// results equivalent to the result series set.
exp storage.SeriesSet
}{
{
a: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
}),
}),
b: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
}, []tsdbutil.Sample{
sample{t: 2, v: 2},
}),
newSeries(map[string]string{
"b": "b",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
}),
}),
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
sample{t: 2, v: 2},
}),
newSeries(map[string]string{
"b": "b",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
}),
}),
},
{
a: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"handler": "prometheus",
"instance": "127.0.0.1:9090",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
}),
newSeries(map[string]string{
"handler": "prometheus",
"instance": "localhost:9090",
}, []tsdbutil.Sample{
sample{t: 1, v: 2},
}),
}),
b: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"handler": "prometheus",
"instance": "127.0.0.1:9090",
}, []tsdbutil.Sample{
sample{t: 2, v: 1},
}),
newSeries(map[string]string{
"handler": "query",
"instance": "localhost:9090",
}, []tsdbutil.Sample{
sample{t: 2, v: 2},
}),
}),
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"handler": "prometheus",
"instance": "127.0.0.1:9090",
}, []tsdbutil.Sample{
sample{t: 1, v: 1},
sample{t: 2, v: 1},
}),
newSeries(map[string]string{
"handler": "prometheus",
"instance": "localhost:9090",
}, []tsdbutil.Sample{
sample{t: 1, v: 2},
}),
newSeries(map[string]string{
"handler": "query",
"instance": "localhost:9090",
}, []tsdbutil.Sample{
sample{t: 2, v: 2},
}),
}),
},
}
Outer:
for _, c := range cases {
res := NewMergedSeriesSet([]storage.SeriesSet{c.a, c.b})
for {
eok, rok := c.exp.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := c.exp.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func expandSeriesIterator(it chunkenc.Iterator) (r []tsdbutil.Sample, err error) {
for it.Next() {
t, v := it.At()
r = append(r, sample{t: t, v: v})
}
return r, it.Err()
}
type seriesSamples struct {
lset map[string]string
chunks [][]sample
}
// Index: labels -> postings -> chunkMetas -> chunkRef
// ChunkReader: ref -> vals
func createIdxChkReaders(t *testing.T, tc []seriesSamples) (IndexReader, ChunkReader, int64, int64) {
sort.Slice(tc, func(i, j int) bool {
return labels.Compare(labels.FromMap(tc[i].lset), labels.FromMap(tc[i].lset)) < 0
})
postings := index.NewMemPostings()
chkReader := mockChunkReader(make(map[uint64]chunkenc.Chunk))
lblIdx := make(map[string]stringset)
mi := newMockIndex()
blockMint := int64(math.MaxInt64)
blockMaxt := int64(math.MinInt64)
var chunkRef uint64
for i, s := range tc {
i = i + 1 // 0 is not a valid posting.
metas := make([]chunks.Meta, 0, len(s.chunks))
for _, chk := range s.chunks {
if chk[0].t < blockMint {
blockMint = chk[0].t
}
if chk[len(chk)-1].t > blockMaxt {
blockMaxt = chk[len(chk)-1].t
}
metas = append(metas, chunks.Meta{
MinTime: chk[0].t,
MaxTime: chk[len(chk)-1].t,
Ref: chunkRef,
})
chunk := chunkenc.NewXORChunk()
app, _ := chunk.Appender()
for _, smpl := range chk {
app.Append(smpl.t, smpl.v)
}
chkReader[chunkRef] = chunk
chunkRef++
}
ls := labels.FromMap(s.lset)
testutil.Ok(t, mi.AddSeries(uint64(i), ls, metas...))
postings.Add(uint64(i), ls)
for _, l := range ls {
vs, present := lblIdx[l.Name]
if !present {
vs = stringset{}
lblIdx[l.Name] = vs
}
vs.set(l.Value)
}
}
testutil.Ok(t, postings.Iter(func(l labels.Label, p index.Postings) error {
return mi.WritePostings(l.Name, l.Value, p)
}))
return mi, chkReader, blockMint, blockMaxt
}
func TestBlockQuerier(t *testing.T) {
newSeries := func(l map[string]string, s []tsdbutil.Sample) storage.Series {
return &mockSeries{
labels: func() labels.Labels { return labels.FromMap(l) },
iterator: func() chunkenc.Iterator { return newListSeriesIterator(s) },
}
}
type query struct {
mint, maxt int64
ms []*labels.Matcher
exp storage.SeriesSet
}
cases := struct {
data []seriesSamples
queries []query
}{
data: []seriesSamples{
{
lset: map[string]string{
"a": "a",
},
chunks: [][]sample{
{
{1, 2}, {2, 3}, {3, 4},
},
{
{5, 2}, {6, 3}, {7, 4},
},
},
},
{
lset: map[string]string{
"a": "a",
"b": "b",
},
chunks: [][]sample{
{
{1, 1}, {2, 2}, {3, 3},
},
{
{5, 3}, {6, 6},
},
},
},
{
lset: map[string]string{
"b": "b",
},
chunks: [][]sample{
{
{1, 3}, {2, 2}, {3, 6},
},
{
{5, 1}, {6, 7}, {7, 2},
},
},
},
},
queries: []query{
{
mint: 0,
maxt: 0,
ms: []*labels.Matcher{},
exp: newMockSeriesSet([]storage.Series{}),
},
{
mint: 0,
maxt: 0,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{}),
},
{
mint: 1,
maxt: 0,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{}),
},
{
mint: 2,
maxt: 6,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
},
[]tsdbutil.Sample{sample{2, 3}, sample{3, 4}, sample{5, 2}, sample{6, 3}},
),
newSeries(map[string]string{
"a": "a",
"b": "b",
},
[]tsdbutil.Sample{sample{2, 2}, sample{3, 3}, sample{5, 3}, sample{6, 6}},
),
}),
},
},
}
Outer:
for _, c := range cases.queries {
ir, cr, _, _ := createIdxChkReaders(t, cases.data)
querier := &blockQuerier{
index: ir,
chunks: cr,
tombstones: tombstones.NewMemTombstones(),
mint: c.mint,
maxt: c.maxt,
}
res, ws, err := querier.Select(false, nil, c.ms...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
for {
eok, rok := c.exp.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := c.exp.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestBlockQuerierDelete(t *testing.T) {
newSeries := func(l map[string]string, s []tsdbutil.Sample) storage.Series {
return &mockSeries{
labels: func() labels.Labels { return labels.FromMap(l) },
iterator: func() chunkenc.Iterator { return newListSeriesIterator(s) },
}
}
type query struct {
mint, maxt int64
ms []*labels.Matcher
exp storage.SeriesSet
}
cases := struct {
data []seriesSamples
tombstones tombstones.Reader
queries []query
}{
data: []seriesSamples{
{
lset: map[string]string{
"a": "a",
},
chunks: [][]sample{
{
{1, 2}, {2, 3}, {3, 4},
},
{
{5, 2}, {6, 3}, {7, 4},
},
},
},
{
lset: map[string]string{
"a": "a",
"b": "b",
},
chunks: [][]sample{
{
{1, 1}, {2, 2}, {3, 3},
},
{
{4, 15}, {5, 3}, {6, 6},
},
},
},
{
lset: map[string]string{
"b": "b",
},
chunks: [][]sample{
{
{1, 3}, {2, 2}, {3, 6},
},
{
{5, 1}, {6, 7}, {7, 2},
},
},
},
},
tombstones: tombstones.NewTestMemTombstones([]tombstones.Intervals{
{{Mint: 1, Maxt: 3}},
{{Mint: 1, Maxt: 3}, {Mint: 6, Maxt: 10}},
{{Mint: 6, Maxt: 10}},
}),
queries: []query{
{
mint: 2,
maxt: 7,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
},
[]tsdbutil.Sample{sample{5, 2}, sample{6, 3}, sample{7, 4}},
),
newSeries(map[string]string{
"a": "a",
"b": "b",
},
[]tsdbutil.Sample{sample{4, 15}, sample{5, 3}},
),
}),
},
{
mint: 2,
maxt: 7,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "b", "b")},
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
"b": "b",
},
[]tsdbutil.Sample{sample{4, 15}, sample{5, 3}},
),
newSeries(map[string]string{
"b": "b",
},
[]tsdbutil.Sample{sample{2, 2}, sample{3, 6}, sample{5, 1}},
),
}),
},
{
mint: 1,
maxt: 4,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{
newSeries(map[string]string{
"a": "a",
"b": "b",
},
[]tsdbutil.Sample{sample{4, 15}},
),
}),
},
{
mint: 1,
maxt: 3,
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "a")},
exp: newMockSeriesSet([]storage.Series{}),
},
},
}
Outer:
for _, c := range cases.queries {
ir, cr, _, _ := createIdxChkReaders(t, cases.data)
querier := &blockQuerier{
index: ir,
chunks: cr,
tombstones: cases.tombstones,
mint: c.mint,
maxt: c.maxt,
}
res, ws, err := querier.Select(false, nil, c.ms...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
for {
eok, rok := c.exp.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := c.exp.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestBaseChunkSeries(t *testing.T) {
type refdSeries struct {
lset labels.Labels
chunks []chunks.Meta
ref uint64
}
cases := []struct {
series []refdSeries
// Postings should be in the sorted order of the series
postings []uint64
expIdxs []int
}{
{
series: []refdSeries{
{
lset: labels.New([]labels.Label{{Name: "a", Value: "a"}}...),
chunks: []chunks.Meta{
{Ref: 29}, {Ref: 45}, {Ref: 245}, {Ref: 123}, {Ref: 4232}, {Ref: 5344},
{Ref: 121},
},
ref: 12,
},
{
lset: labels.New([]labels.Label{{Name: "a", Value: "a"}, {Name: "b", Value: "b"}}...),
chunks: []chunks.Meta{
{Ref: 82}, {Ref: 23}, {Ref: 234}, {Ref: 65}, {Ref: 26},
},
ref: 10,
},
{
lset: labels.New([]labels.Label{{Name: "b", Value: "c"}}...),
chunks: []chunks.Meta{{Ref: 8282}},
ref: 1,
},
{
lset: labels.New([]labels.Label{{Name: "b", Value: "b"}}...),
chunks: []chunks.Meta{
{Ref: 829}, {Ref: 239}, {Ref: 2349}, {Ref: 659}, {Ref: 269},
},
ref: 108,
},
},
postings: []uint64{12, 13, 10, 108}, // 13 doesn't exist and should just be skipped over.
expIdxs: []int{0, 1, 3},
},
{
series: []refdSeries{
{
lset: labels.New([]labels.Label{{Name: "a", Value: "a"}, {Name: "b", Value: "b"}}...),
chunks: []chunks.Meta{
{Ref: 82}, {Ref: 23}, {Ref: 234}, {Ref: 65}, {Ref: 26},
},
ref: 10,
},
{
lset: labels.New([]labels.Label{{Name: "b", Value: "c"}}...),
chunks: []chunks.Meta{{Ref: 8282}},
ref: 3,
},
},
postings: []uint64{},
expIdxs: []int{},
},
}
for _, tc := range cases {
mi := newMockIndex()
for _, s := range tc.series {
testutil.Ok(t, mi.AddSeries(s.ref, s.lset, s.chunks...))
}
bcs := &baseChunkSeries{
p: index.NewListPostings(tc.postings),
index: mi,
tombstones: tombstones.NewMemTombstones(),
}
i := 0
for bcs.Next() {
lset, chks, _ := bcs.At()
idx := tc.expIdxs[i]
testutil.Equals(t, tc.series[idx].lset, lset)
testutil.Equals(t, tc.series[idx].chunks, chks)
i++
}
testutil.Equals(t, len(tc.expIdxs), i)
testutil.Ok(t, bcs.Err())
}
}
type itSeries struct {
si chunkenc.Iterator
}
func (s itSeries) Iterator() chunkenc.Iterator { return s.si }
func (s itSeries) Labels() labels.Labels { return labels.Labels{} }
func TestSeriesIterator(t *testing.T) {
itcases := []struct {
a, b, c []tsdbutil.Sample
exp []tsdbutil.Sample
mint, maxt int64
}{
{
a: []tsdbutil.Sample{},
b: []tsdbutil.Sample{},
c: []tsdbutil.Sample{},
exp: []tsdbutil.Sample{},
mint: math.MinInt64,
maxt: math.MaxInt64,
},
{
a: []tsdbutil.Sample{
sample{1, 2},
sample{2, 3},
sample{3, 5},
sample{6, 1},
},
b: []tsdbutil.Sample{},
c: []tsdbutil.Sample{
sample{7, 89}, sample{9, 8},
},
exp: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1}, sample{7, 89}, sample{9, 8},
},
mint: math.MinInt64,
maxt: math.MaxInt64,
},
{
a: []tsdbutil.Sample{},
b: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1},
},
c: []tsdbutil.Sample{
sample{7, 89}, sample{9, 8},
},
exp: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1}, sample{7, 89}, sample{9, 8},
},
mint: 2,
maxt: 8,
},
{
a: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1},
},
b: []tsdbutil.Sample{
sample{7, 89}, sample{9, 8},
},
c: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
exp: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1}, sample{7, 89}, sample{9, 8}, sample{10, 22}, sample{203, 3493},
},
mint: 6,
maxt: 10,
},
}
seekcases := []struct {
a, b, c []tsdbutil.Sample
seek int64
success bool
exp []tsdbutil.Sample
mint, maxt int64
}{
{
a: []tsdbutil.Sample{},
b: []tsdbutil.Sample{},
c: []tsdbutil.Sample{},
seek: 0,
success: false,
exp: nil,
},
{
a: []tsdbutil.Sample{
sample{2, 3},
},
b: []tsdbutil.Sample{},
c: []tsdbutil.Sample{
sample{7, 89}, sample{9, 8},
},
seek: 10,
success: false,
exp: nil,
mint: math.MinInt64,
maxt: math.MaxInt64,
},
{
a: []tsdbutil.Sample{},
b: []tsdbutil.Sample{
sample{1, 2}, sample{3, 5}, sample{6, 1},
},
c: []tsdbutil.Sample{
sample{7, 89}, sample{9, 8},
},
seek: 2,
success: true,
exp: []tsdbutil.Sample{
sample{3, 5}, sample{6, 1}, sample{7, 89}, sample{9, 8},
},
mint: 5,
maxt: 8,
},
{
a: []tsdbutil.Sample{
sample{6, 1},
},
b: []tsdbutil.Sample{
sample{9, 8},
},
c: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
seek: 10,
success: true,
exp: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
mint: 10,
maxt: 203,
},
{
a: []tsdbutil.Sample{
sample{6, 1},
},
b: []tsdbutil.Sample{
sample{9, 8},
},
c: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
seek: 203,
success: true,
exp: []tsdbutil.Sample{
sample{203, 3493},
},
mint: 7,
maxt: 203,
},
}
t.Run("Chunk", func(t *testing.T) {
for _, tc := range itcases {
chkMetas := []chunks.Meta{
tsdbutil.ChunkFromSamples(tc.a),
tsdbutil.ChunkFromSamples(tc.b),
tsdbutil.ChunkFromSamples(tc.c),
}
res := newChunkSeriesIterator(chkMetas, nil, tc.mint, tc.maxt)
smplValid := make([]tsdbutil.Sample, 0)
for _, s := range tc.exp {
if s.T() >= tc.mint && s.T() <= tc.maxt {
smplValid = append(smplValid, tsdbutil.Sample(s))
}
}
exp := newListSeriesIterator(smplValid)
smplExp, errExp := expandSeriesIterator(exp)
smplRes, errRes := expandSeriesIterator(res)
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
t.Run("Seek", func(t *testing.T) {
extra := []struct {
a, b, c []tsdbutil.Sample
seek int64
success bool
exp []tsdbutil.Sample
mint, maxt int64
}{
{
a: []tsdbutil.Sample{
sample{6, 1},
},
b: []tsdbutil.Sample{
sample{9, 8},
},
c: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
seek: 203,
success: false,
exp: nil,
mint: 2,
maxt: 202,
},
{
a: []tsdbutil.Sample{
sample{6, 1},
},
b: []tsdbutil.Sample{
sample{9, 8},
},
c: []tsdbutil.Sample{
sample{10, 22}, sample{203, 3493},
},
seek: 5,
success: true,
exp: []tsdbutil.Sample{sample{10, 22}},
mint: 10,
maxt: 202,
},
}
seekcases2 := append(seekcases, extra...)
for _, tc := range seekcases2 {
chkMetas := []chunks.Meta{
tsdbutil.ChunkFromSamples(tc.a),
tsdbutil.ChunkFromSamples(tc.b),
tsdbutil.ChunkFromSamples(tc.c),
}
res := newChunkSeriesIterator(chkMetas, nil, tc.mint, tc.maxt)
smplValid := make([]tsdbutil.Sample, 0)
for _, s := range tc.exp {
if s.T() >= tc.mint && s.T() <= tc.maxt {
smplValid = append(smplValid, tsdbutil.Sample(s))
}
}
exp := newListSeriesIterator(smplValid)
testutil.Equals(t, tc.success, res.Seek(tc.seek))
if tc.success {
// Init the list and then proceed to check.
remaining := exp.Next()
testutil.Assert(t, remaining == true, "")
for remaining {
sExp, eExp := exp.At()
sRes, eRes := res.At()
testutil.Equals(t, eExp, eRes)
testutil.Equals(t, sExp, sRes)
remaining = exp.Next()
testutil.Equals(t, remaining, res.Next())
}
}
}
})
})
t.Run("Chain", func(t *testing.T) {
// Extra cases for overlapping series.
itcasesExtra := []struct {
a, b, c []tsdbutil.Sample
exp []tsdbutil.Sample
mint, maxt int64
}{
{
a: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{3, 5}, sample{6, 1},
},
b: []tsdbutil.Sample{
sample{5, 49}, sample{7, 89}, sample{9, 8},
},
c: []tsdbutil.Sample{
sample{2, 33}, sample{4, 44}, sample{10, 3},
},
exp: []tsdbutil.Sample{
sample{1, 2}, sample{2, 33}, sample{3, 5}, sample{4, 44}, sample{5, 49}, sample{6, 1}, sample{7, 89}, sample{9, 8}, sample{10, 3},
},
mint: math.MinInt64,
maxt: math.MaxInt64,
},
{
a: []tsdbutil.Sample{
sample{1, 2}, sample{2, 3}, sample{9, 5}, sample{13, 1},
},
b: []tsdbutil.Sample{},
c: []tsdbutil.Sample{
sample{1, 23}, sample{2, 342}, sample{3, 25}, sample{6, 11},
},
exp: []tsdbutil.Sample{
sample{1, 23}, sample{2, 342}, sample{3, 25}, sample{6, 11}, sample{9, 5}, sample{13, 1},
},
mint: math.MinInt64,
maxt: math.MaxInt64,
},
}
for _, tc := range itcases {
a, b, c := itSeries{newListSeriesIterator(tc.a)},
itSeries{newListSeriesIterator(tc.b)},
itSeries{newListSeriesIterator(tc.c)}
res := newChainedSeriesIterator(a, b, c)
exp := newListSeriesIterator([]tsdbutil.Sample(tc.exp))
smplExp, errExp := expandSeriesIterator(exp)
smplRes, errRes := expandSeriesIterator(res)
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
for _, tc := range append(itcases, itcasesExtra...) {
a, b, c := itSeries{newListSeriesIterator(tc.a)},
itSeries{newListSeriesIterator(tc.b)},
itSeries{newListSeriesIterator(tc.c)}
res := newVerticalMergeSeriesIterator(a, b, c)
exp := newListSeriesIterator([]tsdbutil.Sample(tc.exp))
smplExp, errExp := expandSeriesIterator(exp)
smplRes, errRes := expandSeriesIterator(res)
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
t.Run("Seek", func(t *testing.T) {
for _, tc := range seekcases {
ress := []chunkenc.Iterator{
newChainedSeriesIterator(
itSeries{newListSeriesIterator(tc.a)},
itSeries{newListSeriesIterator(tc.b)},
itSeries{newListSeriesIterator(tc.c)},
),
newVerticalMergeSeriesIterator(
itSeries{newListSeriesIterator(tc.a)},
itSeries{newListSeriesIterator(tc.b)},
itSeries{newListSeriesIterator(tc.c)},
),
}
for _, res := range ress {
exp := newListSeriesIterator(tc.exp)
testutil.Equals(t, tc.success, res.Seek(tc.seek))
if tc.success {
// Init the list and then proceed to check.
remaining := exp.Next()
testutil.Assert(t, remaining == true, "")
for remaining {
sExp, eExp := exp.At()
sRes, eRes := res.At()
testutil.Equals(t, eExp, eRes)
testutil.Equals(t, sExp, sRes)
remaining = exp.Next()
testutil.Equals(t, remaining, res.Next())
}
}
}
}
})
})
}
// Regression for: https://github.com/prometheus/tsdb/pull/97
func TestChunkSeriesIterator_DoubleSeek(t *testing.T) {
chkMetas := []chunks.Meta{
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 1}, sample{2, 2}, sample{3, 3}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{4, 4}, sample{5, 5}}),
}
res := newChunkSeriesIterator(chkMetas, nil, 2, 8)
testutil.Assert(t, res.Seek(1) == true, "")
testutil.Assert(t, res.Seek(2) == true, "")
ts, v := res.At()
testutil.Equals(t, int64(2), ts)
testutil.Equals(t, float64(2), v)
}
// Regression when seeked chunks were still found via binary search and we always
// skipped to the end when seeking a value in the current chunk.
func TestChunkSeriesIterator_SeekInCurrentChunk(t *testing.T) {
metas := []chunks.Meta{
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 2}, sample{3, 4}, sample{5, 6}, sample{7, 8}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{}),
}
it := newChunkSeriesIterator(metas, nil, 1, 7)
testutil.Assert(t, it.Next() == true, "")
ts, v := it.At()
testutil.Equals(t, int64(1), ts)
testutil.Equals(t, float64(2), v)
testutil.Assert(t, it.Seek(4) == true, "")
ts, v = it.At()
testutil.Equals(t, int64(5), ts)
testutil.Equals(t, float64(6), v)
}
// Regression when calling Next() with a time bounded to fit within two samples.
// Seek gets called and advances beyond the max time, which was just accepted as a valid sample.
func TestChunkSeriesIterator_NextWithMinTime(t *testing.T) {
metas := []chunks.Meta{
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 6}, sample{5, 6}, sample{7, 8}}),
}
it := newChunkSeriesIterator(metas, nil, 2, 4)
testutil.Assert(t, it.Next() == false, "")
}
func TestPopulatedCSReturnsValidChunkSlice(t *testing.T) {
lbls := []labels.Labels{labels.New(labels.Label{Name: "a", Value: "b"})}
chunkMetas := [][]chunks.Meta{
{
{MinTime: 1, MaxTime: 2, Ref: 1},
{MinTime: 3, MaxTime: 4, Ref: 2},
{MinTime: 10, MaxTime: 12, Ref: 3},
},
}
cr := mockChunkReader(
map[uint64]chunkenc.Chunk{
1: chunkenc.NewXORChunk(),
2: chunkenc.NewXORChunk(),
3: chunkenc.NewXORChunk(),
},
)
m := &mockChunkSeriesSet{l: lbls, cm: chunkMetas, i: -1}
p := &populatedChunkSeries{
set: m,
chunks: cr,
mint: 0,
maxt: 0,
}
testutil.Assert(t, p.Next() == false, "")
p.mint = 6
p.maxt = 9
testutil.Assert(t, p.Next() == false, "")
// Test the case where 1 chunk could cause an unpopulated chunk to be returned.
chunkMetas = [][]chunks.Meta{
{
{MinTime: 1, MaxTime: 2, Ref: 1},
},
}
m = &mockChunkSeriesSet{l: lbls, cm: chunkMetas, i: -1}
p = &populatedChunkSeries{
set: m,
chunks: cr,
mint: 10,
maxt: 15,
}
testutil.Assert(t, p.Next() == false, "")
}
type mockChunkSeriesSet struct {
l []labels.Labels
cm [][]chunks.Meta
i int
}
func (m *mockChunkSeriesSet) Next() bool {
if len(m.l) != len(m.cm) {
return false
}
m.i++
return m.i < len(m.l)
}
func (m *mockChunkSeriesSet) At() (labels.Labels, []chunks.Meta, tombstones.Intervals) {
return m.l[m.i], m.cm[m.i], nil
}
func (m *mockChunkSeriesSet) Err() error {
return nil
}
// Test the cost of merging series sets for different number of merged sets and their size.
// The subset are all equivalent so this does not capture merging of partial or non-overlapping sets well.
// TODO(bwplotka): Merge with storage merged series set benchmark.
func BenchmarkMergedSeriesSet(b *testing.B) {
var sel = func(sets []storage.SeriesSet) storage.SeriesSet {
return NewMergedSeriesSet(sets)
}
for _, k := range []int{
100,
1000,
10000,
20000,
} {
for _, j := range []int{1, 2, 4, 8, 16, 32} {
b.Run(fmt.Sprintf("series=%d,blocks=%d", k, j), func(b *testing.B) {
lbls, err := labels.ReadLabels(filepath.Join("testdata", "20kseries.json"), k)
testutil.Ok(b, err)
sort.Sort(labels.Slice(lbls))
in := make([][]storage.Series, j)
for _, l := range lbls {
l2 := l
for j := range in {
in[j] = append(in[j], &mockSeries{labels: func() labels.Labels { return l2 }})
}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
var sets []storage.SeriesSet
for _, s := range in {
sets = append(sets, newMockSeriesSet(s))
}
ms := sel(sets)
i := 0
for ms.Next() {
i++
}
testutil.Ok(b, ms.Err())
testutil.Equals(b, len(lbls), i)
}
})
}
}
}
type mockChunkReader map[uint64]chunkenc.Chunk
func (cr mockChunkReader) Chunk(id uint64) (chunkenc.Chunk, error) {
chk, ok := cr[id]
if ok {
return chk, nil
}
return nil, errors.New("Chunk with ref not found")
}
func (cr mockChunkReader) Close() error {
return nil
}
func TestDeletedIterator(t *testing.T) {
chk := chunkenc.NewXORChunk()
app, err := chk.Appender()
testutil.Ok(t, err)
// Insert random stuff from (0, 1000).
act := make([]sample, 1000)
for i := 0; i < 1000; i++ {
act[i].t = int64(i)
act[i].v = rand.Float64()
app.Append(act[i].t, act[i].v)
}
cases := []struct {
r tombstones.Intervals
}{
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}},
{r: tombstones.Intervals{{Mint: 1, Maxt: 10}, {Mint: 12, Maxt: 20}, {Mint: 21, Maxt: 23}, {Mint: 25, Maxt: 30}}},
{r: tombstones.Intervals{{Mint: 1, Maxt: 10}, {Mint: 12, Maxt: 20}, {Mint: 20, Maxt: 30}}},
{r: tombstones.Intervals{{Mint: 1, Maxt: 10}, {Mint: 12, Maxt: 23}, {Mint: 25, Maxt: 30}}},
{r: tombstones.Intervals{{Mint: 1, Maxt: 23}, {Mint: 12, Maxt: 20}, {Mint: 25, Maxt: 30}}},
{r: tombstones.Intervals{{Mint: 1, Maxt: 23}, {Mint: 12, Maxt: 20}, {Mint: 25, Maxt: 3000}}},
{r: tombstones.Intervals{{Mint: 0, Maxt: 2000}}},
{r: tombstones.Intervals{{Mint: 500, Maxt: 2000}}},
{r: tombstones.Intervals{{Mint: 0, Maxt: 200}}},
{r: tombstones.Intervals{{Mint: 1000, Maxt: 20000}}},
}
for _, c := range cases {
i := int64(-1)
it := &deletedIterator{it: chk.Iterator(nil), intervals: c.r[:]}
ranges := c.r[:]
for it.Next() {
i++
for _, tr := range ranges {
if tr.InBounds(i) {
i = tr.Maxt + 1
ranges = ranges[1:]
}
}
testutil.Assert(t, i < 1000, "")
ts, v := it.At()
testutil.Equals(t, act[i].t, ts)
testutil.Equals(t, act[i].v, v)
}
// There has been an extra call to Next().
i++
for _, tr := range ranges {
if tr.InBounds(i) {
i = tr.Maxt + 1
ranges = ranges[1:]
}
}
testutil.Assert(t, i >= 1000, "")
testutil.Ok(t, it.Err())
}
}
func TestDeletedIterator_WithSeek(t *testing.T) {
chk := chunkenc.NewXORChunk()
app, err := chk.Appender()
testutil.Ok(t, err)
// Insert random stuff from (0, 1000).
act := make([]sample, 1000)
for i := 0; i < 1000; i++ {
act[i].t = int64(i)
act[i].v = float64(i)
app.Append(act[i].t, act[i].v)
}
cases := []struct {
r tombstones.Intervals
seek int64
ok bool
seekedTs int64
}{
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}, seek: 1, ok: true, seekedTs: 21},
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}, seek: 20, ok: true, seekedTs: 21},
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}, seek: 10, ok: true, seekedTs: 21},
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}, seek: 999, ok: true, seekedTs: 999},
{r: tombstones.Intervals{{Mint: 1, Maxt: 20}}, seek: 1000, ok: false},
{r: tombstones.Intervals{{Mint: 1, Maxt: 23}, {Mint: 24, Maxt: 40}, {Mint: 45, Maxt: 3000}}, seek: 1, ok: true, seekedTs: 41},
{r: tombstones.Intervals{{Mint: 5, Maxt: 23}, {Mint: 24, Maxt: 40}, {Mint: 41, Maxt: 3000}}, seek: 5, ok: false},
{r: tombstones.Intervals{{Mint: 0, Maxt: 2000}}, seek: 10, ok: false},
{r: tombstones.Intervals{{Mint: 500, Maxt: 2000}}, seek: 10, ok: true, seekedTs: 10},
{r: tombstones.Intervals{{Mint: 500, Maxt: 2000}}, seek: 501, ok: false},
}
for _, c := range cases {
it := &deletedIterator{it: chk.Iterator(nil), intervals: c.r[:]}
testutil.Equals(t, c.ok, it.Seek(c.seek))
if c.ok {
ts, _ := it.At()
testutil.Equals(t, c.seekedTs, ts)
}
}
}
type series struct {
l labels.Labels
chunks []chunks.Meta
}
type mockIndex struct {
series map[uint64]series
postings map[labels.Label][]uint64
symbols map[string]struct{}
}
func newMockIndex() mockIndex {
ix := mockIndex{
series: make(map[uint64]series),
postings: make(map[labels.Label][]uint64),
symbols: make(map[string]struct{}),
}
return ix
}
func (m mockIndex) Symbols() index.StringIter {
l := []string{}
for s := range m.symbols {
l = append(l, s)
}
sort.Strings(l)
return index.NewStringListIter(l)
}
func (m *mockIndex) AddSeries(ref uint64, l labels.Labels, chunks ...chunks.Meta) error {
if _, ok := m.series[ref]; ok {
return errors.Errorf("series with reference %d already added", ref)
}
for _, lbl := range l {
m.symbols[lbl.Name] = struct{}{}
m.symbols[lbl.Value] = struct{}{}
}
s := series{l: l}
// Actual chunk data is not stored in the index.
for _, c := range chunks {
c.Chunk = nil
s.chunks = append(s.chunks, c)
}
m.series[ref] = s
return nil
}
func (m mockIndex) WritePostings(name, value string, it index.Postings) error {
l := labels.Label{Name: name, Value: value}
if _, ok := m.postings[l]; ok {
return errors.Errorf("postings for %s already added", l)
}
ep, err := index.ExpandPostings(it)
if err != nil {
return err
}
m.postings[l] = ep
return nil
}
func (m mockIndex) Close() error {
return nil
}
func (m mockIndex) LabelValues(name string) ([]string, error) {
values := []string{}
for l := range m.postings {
if l.Name == name {
values = append(values, l.Value)
}
}
sort.Strings(values)
return values, nil
}
func (m mockIndex) Postings(name string, values ...string) (index.Postings, error) {
res := make([]index.Postings, 0, len(values))
for _, value := range values {
l := labels.Label{Name: name, Value: value}
res = append(res, index.NewListPostings(m.postings[l]))
}
return index.Merge(res...), nil
}
func (m mockIndex) SortedPostings(p index.Postings) index.Postings {
ep, err := index.ExpandPostings(p)
if err != nil {
return index.ErrPostings(errors.Wrap(err, "expand postings"))
}
sort.Slice(ep, func(i, j int) bool {
return labels.Compare(m.series[ep[i]].l, m.series[ep[j]].l) < 0
})
return index.NewListPostings(ep)
}
func (m mockIndex) Series(ref uint64, lset *labels.Labels, chks *[]chunks.Meta) error {
s, ok := m.series[ref]
if !ok {
return storage.ErrNotFound
}
*lset = append((*lset)[:0], s.l...)
*chks = append((*chks)[:0], s.chunks...)
return nil
}
func (m mockIndex) LabelNames() ([]string, error) {
names := map[string]struct{}{}
for l := range m.postings {
names[l.Name] = struct{}{}
}
l := make([]string, 0, len(names))
for name := range names {
l = append(l, name)
}
sort.Strings(l)
return l, nil
}
type mockSeries struct {
labels func() labels.Labels
iterator func() chunkenc.Iterator
}
func newSeries(l map[string]string, s []tsdbutil.Sample) storage.Series {
return &mockSeries{
labels: func() labels.Labels { return labels.FromMap(l) },
iterator: func() chunkenc.Iterator { return newListSeriesIterator(s) },
}
}
func (m *mockSeries) Labels() labels.Labels { return m.labels() }
func (m *mockSeries) Iterator() chunkenc.Iterator { return m.iterator() }
type listSeriesIterator struct {
list []tsdbutil.Sample
idx int
}
func newListSeriesIterator(list []tsdbutil.Sample) *listSeriesIterator {
return &listSeriesIterator{list: list, idx: -1}
}
func (it *listSeriesIterator) At() (int64, float64) {
s := it.list[it.idx]
return s.T(), s.V()
}
func (it *listSeriesIterator) Next() bool {
it.idx++
return it.idx < len(it.list)
}
func (it *listSeriesIterator) Seek(t int64) bool {
if it.idx == -1 {
it.idx = 0
}
// Do binary search between current position and end.
it.idx = sort.Search(len(it.list)-it.idx, func(i int) bool {
s := it.list[i+it.idx]
return s.T() >= t
})
return it.idx < len(it.list)
}
func (it *listSeriesIterator) Err() error {
return nil
}
func BenchmarkQueryIterator(b *testing.B) {
cases := []struct {
numBlocks int
numSeries int
numSamplesPerSeriesPerBlock int
overlapPercentages []int // >=0, <=100, this is w.r.t. the previous block.
}{
{
numBlocks: 20,
numSeries: 1000,
numSamplesPerSeriesPerBlock: 20000,
overlapPercentages: []int{0, 10, 30},
},
}
for _, c := range cases {
for _, overlapPercentage := range c.overlapPercentages {
benchMsg := fmt.Sprintf("nBlocks=%d,nSeries=%d,numSamplesPerSeriesPerBlock=%d,overlap=%d%%",
c.numBlocks, c.numSeries, c.numSamplesPerSeriesPerBlock, overlapPercentage)
b.Run(benchMsg, func(b *testing.B) {
dir, err := ioutil.TempDir("", "bench_query_iterator")
testutil.Ok(b, err)
defer func() {
testutil.Ok(b, os.RemoveAll(dir))
}()
var (
blocks []*Block
overlapDelta = int64(overlapPercentage * c.numSamplesPerSeriesPerBlock / 100)
prefilledLabels []map[string]string
generatedSeries []storage.Series
)
for i := int64(0); i < int64(c.numBlocks); i++ {
offset := i * overlapDelta
mint := i*int64(c.numSamplesPerSeriesPerBlock) - offset
maxt := mint + int64(c.numSamplesPerSeriesPerBlock) - 1
if len(prefilledLabels) == 0 {
generatedSeries = genSeries(c.numSeries, 10, mint, maxt)
for _, s := range generatedSeries {
prefilledLabels = append(prefilledLabels, s.Labels().Map())
}
} else {
generatedSeries = populateSeries(prefilledLabels, mint, maxt)
}
block, err := OpenBlock(nil, createBlock(b, dir, generatedSeries), nil)
testutil.Ok(b, err)
blocks = append(blocks, block)
defer block.Close()
}
que := &querier{
blocks: make([]storage.Querier, 0, len(blocks)),
}
for _, blk := range blocks {
q, err := NewBlockQuerier(blk, math.MinInt64, math.MaxInt64)
testutil.Ok(b, err)
que.blocks = append(que.blocks, q)
}
var sq storage.Querier = que
if overlapPercentage > 0 {
sq = &verticalQuerier{
querier: *que,
}
}
defer sq.Close()
benchQuery(b, c.numSeries, sq, labels.Selector{labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*")})
})
}
}
}
func BenchmarkQuerySeek(b *testing.B) {
cases := []struct {
numBlocks int
numSeries int
numSamplesPerSeriesPerBlock int
overlapPercentages []int // >=0, <=100, this is w.r.t. the previous block.
}{
{
numBlocks: 20,
numSeries: 100,
numSamplesPerSeriesPerBlock: 2000,
overlapPercentages: []int{0, 10, 30, 50},
},
}
for _, c := range cases {
for _, overlapPercentage := range c.overlapPercentages {
benchMsg := fmt.Sprintf("nBlocks=%d,nSeries=%d,numSamplesPerSeriesPerBlock=%d,overlap=%d%%",
c.numBlocks, c.numSeries, c.numSamplesPerSeriesPerBlock, overlapPercentage)
b.Run(benchMsg, func(b *testing.B) {
dir, err := ioutil.TempDir("", "bench_query_iterator")
testutil.Ok(b, err)
defer func() {
testutil.Ok(b, os.RemoveAll(dir))
}()
var (
blocks []*Block
overlapDelta = int64(overlapPercentage * c.numSamplesPerSeriesPerBlock / 100)
prefilledLabels []map[string]string
generatedSeries []storage.Series
)
for i := int64(0); i < int64(c.numBlocks); i++ {
offset := i * overlapDelta
mint := i*int64(c.numSamplesPerSeriesPerBlock) - offset
maxt := mint + int64(c.numSamplesPerSeriesPerBlock) - 1
if len(prefilledLabels) == 0 {
generatedSeries = genSeries(c.numSeries, 10, mint, maxt)
for _, s := range generatedSeries {
prefilledLabels = append(prefilledLabels, s.Labels().Map())
}
} else {
generatedSeries = populateSeries(prefilledLabels, mint, maxt)
}
block, err := OpenBlock(nil, createBlock(b, dir, generatedSeries), nil)
testutil.Ok(b, err)
blocks = append(blocks, block)
defer block.Close()
}
que := &querier{
blocks: make([]storage.Querier, 0, len(blocks)),
}
for _, blk := range blocks {
q, err := NewBlockQuerier(blk, math.MinInt64, math.MaxInt64)
testutil.Ok(b, err)
que.blocks = append(que.blocks, q)
}
var sq storage.Querier = que
if overlapPercentage > 0 {
sq = &verticalQuerier{
querier: *que,
}
}
defer sq.Close()
mint := blocks[0].meta.MinTime
maxt := blocks[len(blocks)-1].meta.MaxTime
b.ResetTimer()
b.ReportAllocs()
ss, ws, err := sq.Select(false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*"))
for ss.Next() {
it := ss.At().Iterator()
for t := mint; t <= maxt; t++ {
it.Seek(t)
}
testutil.Ok(b, it.Err())
}
testutil.Ok(b, ss.Err())
testutil.Ok(b, err)
testutil.Equals(b, 0, len(ws))
})
}
}
}
// Refer to https://github.com/prometheus/prometheus/issues/2651.
func BenchmarkSetMatcher(b *testing.B) {
cases := []struct {
numBlocks int
numSeries int
numSamplesPerSeriesPerBlock int
cardinality int
pattern string
}{
// The first three cases are to find out whether the set
// matcher is always faster than regex matcher.
{
numBlocks: 1,
numSeries: 1,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
{
numBlocks: 1,
numSeries: 15,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
{
numBlocks: 1,
numSeries: 15,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100,
pattern: "1|2|3",
},
// Big data sizes benchmarks.
{
numBlocks: 20,
numSeries: 1000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100,
pattern: "1|2|3",
},
{
numBlocks: 20,
numSeries: 1000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
// Increase cardinality.
{
numBlocks: 1,
numSeries: 100000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 100000,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
{
numBlocks: 1,
numSeries: 500000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 500000,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
{
numBlocks: 10,
numSeries: 500000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 500000,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
{
numBlocks: 1,
numSeries: 1000000,
numSamplesPerSeriesPerBlock: 10,
cardinality: 1000000,
pattern: "1|2|3|4|5|6|7|8|9|10",
},
}
for _, c := range cases {
dir, err := ioutil.TempDir("", "bench_postings_for_matchers")
testutil.Ok(b, err)
defer func() {
testutil.Ok(b, os.RemoveAll(dir))
}()
var (
blocks []*Block
prefilledLabels []map[string]string
generatedSeries []storage.Series
)
for i := int64(0); i < int64(c.numBlocks); i++ {
mint := i * int64(c.numSamplesPerSeriesPerBlock)
maxt := mint + int64(c.numSamplesPerSeriesPerBlock) - 1
if len(prefilledLabels) == 0 {
generatedSeries = genSeries(c.numSeries, 10, mint, maxt)
for _, s := range generatedSeries {
prefilledLabels = append(prefilledLabels, s.Labels().Map())
}
} else {
generatedSeries = populateSeries(prefilledLabels, mint, maxt)
}
block, err := OpenBlock(nil, createBlock(b, dir, generatedSeries), nil)
testutil.Ok(b, err)
blocks = append(blocks, block)
defer block.Close()
}
que := &querier{
blocks: make([]storage.Querier, 0, len(blocks)),
}
for _, blk := range blocks {
q, err := NewBlockQuerier(blk, math.MinInt64, math.MaxInt64)
testutil.Ok(b, err)
que.blocks = append(que.blocks, q)
}
defer que.Close()
benchMsg := fmt.Sprintf("nSeries=%d,nBlocks=%d,cardinality=%d,pattern=\"%s\"", c.numSeries, c.numBlocks, c.cardinality, c.pattern)
b.Run(benchMsg, func(b *testing.B) {
b.ResetTimer()
b.ReportAllocs()
for n := 0; n < b.N; n++ {
_, ws, err := que.Select(false, nil, labels.MustNewMatcher(labels.MatchRegexp, "test", c.pattern))
testutil.Ok(b, err)
testutil.Equals(b, 0, len(ws))
}
})
}
}
// Refer to https://github.com/prometheus/prometheus/issues/2651.
func TestFindSetMatches(t *testing.T) {
cases := []struct {
pattern string
exp []string
}{
// Simple sets.
{
pattern: "^(?:foo|bar|baz)$",
exp: []string{
"foo",
"bar",
"baz",
},
},
// Simple sets containing escaped characters.
{
pattern: "^(?:fo\\.o|bar\\?|\\^baz)$",
exp: []string{
"fo.o",
"bar?",
"^baz",
},
},
// Simple sets containing special characters without escaping.
{
pattern: "^(?:fo.o|bar?|^baz)$",
exp: nil,
},
// Missing wrapper.
{
pattern: "foo|bar|baz",
exp: nil,
},
}
for _, c := range cases {
matches := findSetMatches(c.pattern)
if len(c.exp) == 0 {
if len(matches) != 0 {
t.Errorf("Evaluating %s, unexpected result %v", c.pattern, matches)
}
} else {
if len(matches) != len(c.exp) {
t.Errorf("Evaluating %s, length of result not equal to exp", c.pattern)
} else {
for i := 0; i < len(c.exp); i++ {
if c.exp[i] != matches[i] {
t.Errorf("Evaluating %s, unexpected result %s", c.pattern, matches[i])
}
}
}
}
}
}
func TestPostingsForMatchers(t *testing.T) {
chunkDir, err := ioutil.TempDir("", "chunk_dir")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(chunkDir))
}()
h, err := NewHead(nil, nil, nil, 1000, chunkDir, nil, DefaultStripeSize, nil)
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, h.Close())
}()
app := h.Appender()
app.Add(labels.FromStrings("n", "1"), 0, 0)
app.Add(labels.FromStrings("n", "1", "i", "a"), 0, 0)
app.Add(labels.FromStrings("n", "1", "i", "b"), 0, 0)
app.Add(labels.FromStrings("n", "2"), 0, 0)
app.Add(labels.FromStrings("n", "2.5"), 0, 0)
testutil.Ok(t, app.Commit())
cases := []struct {
matchers []*labels.Matcher
exp []labels.Labels
}{
// Simple equals.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchEqual, "i", "a")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchEqual, "i", "missing")},
exp: []labels.Labels{},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "missing", "")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
// Not equals.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchNotEqual, "n", "1")},
exp: []labels.Labels{
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchNotEqual, "i", "")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchNotEqual, "missing", "")},
exp: []labels.Labels{},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotEqual, "i", "a")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotEqual, "i", "")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
// Regex.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "n", "^1$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^a$")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^a?$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "i", "^$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^.*$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^.+$")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
// Not regex.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchNotRegexp, "n", "^1$")},
exp: []labels.Labels{
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^a$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^a?$")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^$")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^.*$")},
exp: []labels.Labels{},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^.+$")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
},
},
// Combinations.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotEqual, "i", ""), labels.MustNewMatcher(labels.MatchEqual, "i", "a")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "n", "1"), labels.MustNewMatcher(labels.MatchNotEqual, "i", "b"), labels.MustNewMatcher(labels.MatchRegexp, "i", "^(b|a).*$")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
},
},
// Set optimization for Regex.
// Refer to https://github.com/prometheus/prometheus/issues/2651.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "n", "1|2")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
labels.FromStrings("n", "2"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "i", "a|b")},
exp: []labels.Labels{
labels.FromStrings("n", "1", "i", "a"),
labels.FromStrings("n", "1", "i", "b"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "n", "x1|2")},
exp: []labels.Labels{
labels.FromStrings("n", "2"),
},
},
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "n", "2|2\\.5")},
exp: []labels.Labels{
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
// Empty value.
{
matchers: []*labels.Matcher{labels.MustNewMatcher(labels.MatchRegexp, "i", "c||d")},
exp: []labels.Labels{
labels.FromStrings("n", "1"),
labels.FromStrings("n", "2"),
labels.FromStrings("n", "2.5"),
},
},
}
ir, err := h.Index()
testutil.Ok(t, err)
for _, c := range cases {
exp := map[string]struct{}{}
for _, l := range c.exp {
exp[l.String()] = struct{}{}
}
p, err := PostingsForMatchers(ir, c.matchers...)
testutil.Ok(t, err)
for p.Next() {
lbls := labels.Labels{}
testutil.Ok(t, ir.Series(p.At(), &lbls, &[]chunks.Meta{}))
if _, ok := exp[lbls.String()]; !ok {
t.Errorf("Evaluating %v, unexpected result %s", c.matchers, lbls.String())
} else {
delete(exp, lbls.String())
}
}
testutil.Ok(t, p.Err())
if len(exp) != 0 {
t.Errorf("Evaluating %v, missing results %+v", c.matchers, exp)
}
}
}
// TestClose ensures that calling Close more than once doesn't block and doesn't panic.
func TestClose(t *testing.T) {
dir, err := ioutil.TempDir("", "test_storage")
if err != nil {
t.Fatalf("Opening test dir failed: %s", err)
}
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
createBlock(t, dir, genSeries(1, 1, 0, 10))
createBlock(t, dir, genSeries(1, 1, 10, 20))
db, err := Open(dir, nil, nil, DefaultOptions())
if err != nil {
t.Fatalf("Opening test storage failed: %s", err)
}
defer func() {
testutil.Ok(t, db.Close())
}()
q, err := db.Querier(context.TODO(), 0, 20)
testutil.Ok(t, err)
testutil.Ok(t, q.Close())
testutil.NotOk(t, q.Close())
}
func BenchmarkQueries(b *testing.B) {
cases := map[string]labels.Selector{
"Eq Matcher: Expansion - 1": {
labels.MustNewMatcher(labels.MatchEqual, "la", "va"),
},
"Eq Matcher: Expansion - 2": {
labels.MustNewMatcher(labels.MatchEqual, "la", "va"),
labels.MustNewMatcher(labels.MatchEqual, "lb", "vb"),
},
"Eq Matcher: Expansion - 3": {
labels.MustNewMatcher(labels.MatchEqual, "la", "va"),
labels.MustNewMatcher(labels.MatchEqual, "lb", "vb"),
labels.MustNewMatcher(labels.MatchEqual, "lc", "vc"),
},
"Regex Matcher: Expansion - 1": {
labels.MustNewMatcher(labels.MatchRegexp, "la", ".*va"),
},
"Regex Matcher: Expansion - 2": {
labels.MustNewMatcher(labels.MatchRegexp, "la", ".*va"),
labels.MustNewMatcher(labels.MatchRegexp, "lb", ".*vb"),
},
"Regex Matcher: Expansion - 3": {
labels.MustNewMatcher(labels.MatchRegexp, "la", ".*va"),
labels.MustNewMatcher(labels.MatchRegexp, "lb", ".*vb"),
labels.MustNewMatcher(labels.MatchRegexp, "lc", ".*vc"),
},
}
queryTypes := make(map[string]storage.Querier)
defer func() {
for _, q := range queryTypes {
// Can't run a check for error here as some of these will fail as
// queryTypes is using the same slice for the different block queriers
// and would have been closed in the previous iteration.
q.Close()
}
}()
for title, selectors := range cases {
for _, nSeries := range []int{10} {
for _, nSamples := range []int64{1000, 10000, 100000} {
dir, err := ioutil.TempDir("", "test_persisted_query")
testutil.Ok(b, err)
defer func() {
testutil.Ok(b, os.RemoveAll(dir))
}()
series := genSeries(nSeries, 5, 1, int64(nSamples))
// Add some common labels to make the matchers select these series.
{
var commonLbls labels.Labels
for _, selector := range selectors {
switch selector.Type {
case labels.MatchEqual:
commonLbls = append(commonLbls, labels.Label{Name: selector.Name, Value: selector.Value})
case labels.MatchRegexp:
commonLbls = append(commonLbls, labels.Label{Name: selector.Name, Value: selector.Value})
}
}
for i := range commonLbls {
s := series[i].(*mockSeries)
allLabels := append(commonLbls, s.Labels()...)
s = &mockSeries{
labels: func() labels.Labels { return allLabels },
iterator: s.iterator,
}
series[i] = s
}
}
qs := make([]storage.Querier, 0, 10)
for x := 0; x <= 10; x++ {
block, err := OpenBlock(nil, createBlock(b, dir, series), nil)
testutil.Ok(b, err)
q, err := NewBlockQuerier(block, 1, int64(nSamples))
testutil.Ok(b, err)
qs = append(qs, q)
}
queryTypes["_1-Block"] = &querier{blocks: qs[:1]}
queryTypes["_3-Blocks"] = &querier{blocks: qs[0:3]}
queryTypes["_10-Blocks"] = &querier{blocks: qs}
chunkDir, err := ioutil.TempDir("", "chunk_dir")
testutil.Ok(b, err)
defer func() {
testutil.Ok(b, os.RemoveAll(chunkDir))
}()
head := createHead(b, series, chunkDir)
qHead, err := NewBlockQuerier(head, 1, int64(nSamples))
testutil.Ok(b, err)
queryTypes["_Head"] = qHead
for qtype, querier := range queryTypes {
b.Run(title+qtype+"_nSeries:"+strconv.Itoa(nSeries)+"_nSamples:"+strconv.Itoa(int(nSamples)), func(b *testing.B) {
expExpansions, err := strconv.Atoi(string(title[len(title)-1]))
testutil.Ok(b, err)
benchQuery(b, expExpansions, querier, selectors)
})
}
testutil.Ok(b, head.Close())
}
}
}
}
func benchQuery(b *testing.B, expExpansions int, q storage.Querier, selectors labels.Selector) {
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
ss, ws, err := q.Select(false, nil, selectors...)
testutil.Ok(b, err)
testutil.Equals(b, 0, len(ws))
var actualExpansions int
for ss.Next() {
s := ss.At()
s.Labels()
it := s.Iterator()
for it.Next() {
}
actualExpansions++
}
testutil.Equals(b, expExpansions, actualExpansions)
testutil.Ok(b, ss.Err())
}
}
// mockMatcherIndex is used to check if the regex matcher works as expected.
type mockMatcherIndex struct{}
func (m mockMatcherIndex) Symbols() index.StringIter { return nil }
func (m mockMatcherIndex) Close() error { return nil }
// LabelValues will return error if it is called.
func (m mockMatcherIndex) LabelValues(name string) ([]string, error) {
return []string{}, errors.New("label values called")
}
func (m mockMatcherIndex) Postings(name string, values ...string) (index.Postings, error) {
return index.EmptyPostings(), nil
}
func (m mockMatcherIndex) SortedPostings(p index.Postings) index.Postings {
return index.EmptyPostings()
}
func (m mockMatcherIndex) Series(ref uint64, lset *labels.Labels, chks *[]chunks.Meta) error {
return nil
}
func (m mockMatcherIndex) LabelNames() ([]string, error) { return []string{}, nil }
func TestPostingsForMatcher(t *testing.T) {
cases := []struct {
matcher *labels.Matcher
hasError bool
}{
{
// Equal label matcher will just return.
matcher: labels.MustNewMatcher(labels.MatchEqual, "test", "test"),
hasError: false,
},
{
// Regex matcher which doesn't have '|' will call Labelvalues()
matcher: labels.MustNewMatcher(labels.MatchRegexp, "test", ".*"),
hasError: true,
},
{
matcher: labels.MustNewMatcher(labels.MatchRegexp, "test", "a|b"),
hasError: false,
},
{
// Test case for double quoted regex matcher
matcher: labels.MustNewMatcher(labels.MatchRegexp, "test", "^(?:a|b)$"),
hasError: true,
},
}
for _, tc := range cases {
ir := &mockMatcherIndex{}
_, err := postingsForMatcher(ir, tc.matcher)
if tc.hasError {
testutil.NotOk(t, err)
} else {
testutil.Ok(t, err)
}
}
}
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