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prometheus/storage/merge_test.go
Filip Petkovski 583f3e587c
Optimize histogram iterators (#13340) 
Optimize histogram iterators

Histogram iterators allocate new objects in the AtHistogram and
AtFloatHistogram methods, which makes calculating rates over long
ranges expensive.

In #13215 we allowed an existing object to be reused
when converting an integer histogram to a float histogram. This commit follows
the same idea and allows injecting an existing object in the AtHistogram and
AtFloatHistogram methods. When the injected value is nil, iterators allocate
new histograms, otherwise they populate and return the injected object.

The commit also adds a CopyTo method to Histogram and FloatHistogram which
is used in the BufferedIterator to overwrite items in the ring instead of making
new copies.

Note that a specialized HPoint pool is needed for all of this to work 
(`matrixSelectorHPool`).

---------

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>
2024-01-23 17:02:14 +01:00

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// Copyright 2020 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 storage
import (
"context"
"errors"
"fmt"
"math"
"sort"
"sync"
"testing"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/model/histogram"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/tsdb/chunkenc"
"github.com/prometheus/prometheus/tsdb/chunks"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/util/annotations"
)
func TestMergeQuerierWithChainMerger(t *testing.T) {
for _, tc := range []struct {
name string
primaryQuerierSeries []Series
querierSeries [][]Series
extraQueriers []Querier
expected SeriesSet
}{
{
name: "one primary querier with no series",
primaryQuerierSeries: []Series{},
expected: NewMockSeriesSet(),
},
{
name: "one secondary querier with no series",
querierSeries: [][]Series{{}},
expected: NewMockSeriesSet(),
},
{
name: "many secondary queriers with no series",
querierSeries: [][]Series{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockSeriesSet(),
},
{
name: "mix of queriers with no series",
primaryQuerierSeries: []Series{},
querierSeries: [][]Series{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockSeriesSet(),
},
// Test rest of cases on secondary queriers as the different between primary vs secondary is just error handling.
{
name: "one querier, two series",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
),
},
{
name: "two queriers, one different series each",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
}, {
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
),
},
{
name: "two time unsorted queriers, two series each",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "five queriers, only two queriers have two time unsorted series each",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queriers, only two queriers have two time unsorted series each, with 3 noop and one nil querier together",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
extraQueriers: []Querier{NoopQuerier(), NoopQuerier(), nil, NoopQuerier()},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queriers, with two series, one is overlapping",
querierSeries: [][]Series{{}, {}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 21}, fSample{3, 31}, fSample{5, 5}, fSample{6, 6}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}}),
}, {
NewListSeries(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 22}, fSample{3, 32}}),
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}, fSample{4, 4}}),
}, {}},
expected: NewMockSeriesSet(
NewListSeries(
labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 21}, fSample{3, 31}, fSample{5, 5}, fSample{6, 6}},
),
NewListSeries(
labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}},
),
),
},
{
name: "two queries, one with NaN samples series",
querierSeries: [][]Series{{
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}),
}, {
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{1, 1}}),
}},
expected: NewMockSeriesSet(
NewListSeries(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}, fSample{1, 1}}),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
var p Querier
if tc.primaryQuerierSeries != nil {
p = &mockQuerier{toReturn: tc.primaryQuerierSeries}
}
var qs []Querier
for _, in := range tc.querierSeries {
qs = append(qs, &mockQuerier{toReturn: in})
}
qs = append(qs, tc.extraQueriers...)
mergedQuerier := NewMergeQuerier([]Querier{p}, qs, ChainedSeriesMerge).Select(context.Background(), false, nil)
// Get all merged series upfront to make sure there are no incorrectly retained shared
// buffers causing bugs.
var mergedSeries []Series
for mergedQuerier.Next() {
mergedSeries = append(mergedSeries, mergedQuerier.At())
}
require.NoError(t, mergedQuerier.Err())
for _, actualSeries := range mergedSeries {
require.True(t, tc.expected.Next(), "Expected Next() to be true")
expectedSeries := tc.expected.At()
require.Equal(t, expectedSeries.Labels(), actualSeries.Labels())
expSmpl, expErr := ExpandSamples(expectedSeries.Iterator(nil), nil)
actSmpl, actErr := ExpandSamples(actualSeries.Iterator(nil), nil)
require.Equal(t, expErr, actErr)
require.Equal(t, expSmpl, actSmpl)
}
require.False(t, tc.expected.Next(), "Expected Next() to be false")
})
}
}
func TestMergeChunkQuerierWithNoVerticalChunkSeriesMerger(t *testing.T) {
for _, tc := range []struct {
name string
primaryChkQuerierSeries []ChunkSeries
chkQuerierSeries [][]ChunkSeries
extraQueriers []ChunkQuerier
expected ChunkSeriesSet
}{
{
name: "one primary querier with no series",
primaryChkQuerierSeries: []ChunkSeries{},
expected: NewMockChunkSeriesSet(),
},
{
name: "one secondary querier with no series",
chkQuerierSeries: [][]ChunkSeries{{}},
expected: NewMockChunkSeriesSet(),
},
{
name: "many secondary queriers with no series",
chkQuerierSeries: [][]ChunkSeries{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockChunkSeriesSet(),
},
{
name: "mix of queriers with no series",
primaryChkQuerierSeries: []ChunkSeries{},
chkQuerierSeries: [][]ChunkSeries{{}, {}, {}, {}, {}, {}, {}},
expected: NewMockChunkSeriesSet(),
},
// Test rest of cases on secondary queriers as the different between primary vs secondary is just error handling.
{
name: "one querier, two series",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
),
},
{
name: "two secondaries, one different series each",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
),
},
{
name: "two secondaries, two not in time order series each",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "five secondaries, only two have two not in time order series each",
chkQuerierSeries: [][]ChunkSeries{{}, {}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}, {}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "two secondaries, with two not in time order series each, with 3 noop queries and one nil together",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{5, 5}}, []chunks.Sample{fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}}, []chunks.Sample{fSample{2, 2}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{3, 3}}, []chunks.Sample{fSample{4, 4}}),
}},
extraQueriers: []ChunkQuerier{NoopChunkedQuerier(), NoopChunkedQuerier(), nil, NoopChunkedQuerier()},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{5, 5}},
[]chunks.Sample{fSample{6, 6}},
),
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"),
[]chunks.Sample{fSample{0, 0}, fSample{1, 1}},
[]chunks.Sample{fSample{2, 2}},
[]chunks.Sample{fSample{3, 3}},
[]chunks.Sample{fSample{4, 4}},
),
),
},
{
name: "two queries, one with NaN samples series",
chkQuerierSeries: [][]ChunkSeries{{
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}),
}, {
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{1, 1}}),
}},
expected: NewMockChunkSeriesSet(
NewListChunkSeriesFromSamples(labels.FromStrings("foo", "bar"), []chunks.Sample{fSample{0, math.NaN()}}, []chunks.Sample{fSample{1, 1}}),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
var p ChunkQuerier
if tc.primaryChkQuerierSeries != nil {
p = &mockChunkQurier{toReturn: tc.primaryChkQuerierSeries}
}
var qs []ChunkQuerier
for _, in := range tc.chkQuerierSeries {
qs = append(qs, &mockChunkQurier{toReturn: in})
}
qs = append(qs, tc.extraQueriers...)
merged := NewMergeChunkQuerier([]ChunkQuerier{p}, qs, NewCompactingChunkSeriesMerger(nil)).Select(context.Background(), false, nil)
for merged.Next() {
require.True(t, tc.expected.Next(), "Expected Next() to be true")
actualSeries := merged.At()
expectedSeries := tc.expected.At()
require.Equal(t, expectedSeries.Labels(), actualSeries.Labels())
expChks, expErr := ExpandChunks(expectedSeries.Iterator(nil))
actChks, actErr := ExpandChunks(actualSeries.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
}
require.NoError(t, merged.Err())
require.False(t, tc.expected.Next(), "Expected Next() to be false")
})
}
}
func histogramSample(ts int64, hint histogram.CounterResetHint) hSample {
h := tsdbutil.GenerateTestHistogram(int(ts + 1))
h.CounterResetHint = hint
return hSample{t: ts, h: h}
}
func floatHistogramSample(ts int64, hint histogram.CounterResetHint) fhSample {
fh := tsdbutil.GenerateTestFloatHistogram(int(ts + 1))
fh.CounterResetHint = hint
return fhSample{t: ts, fh: fh}
}
// Shorthands for counter reset hints.
const (
uk = histogram.UnknownCounterReset
cr = histogram.CounterReset
nr = histogram.NotCounterReset
ga = histogram.GaugeType
)
func TestCompactingChunkSeriesMerger(t *testing.T) {
m := NewCompactingChunkSeriesMerger(ChainedSeriesMerge)
// histogramSample returns a histogram that is unique to the ts.
histogramSample := func(ts int64) hSample {
return histogramSample(ts, uk)
}
floatHistogramSample := func(ts int64) fhSample {
return floatHistogramSample(ts, uk)
}
for _, tc := range []struct {
name string
input []ChunkSeries
expected ChunkSeries
}{
{
name: "single empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "single series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
{
name: "two empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "two non overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}, []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{7, 7}, fSample{8, 8}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two duplicated",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
{
name: "three overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{4, 4}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}, fSample{5, 5}, fSample{6, 6}}),
},
{
name: "three in chained overlap",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{4, 4}, fSample{6, 66}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{6, 6}, fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{4, 4}, fSample{5, 5}, fSample{6, 66}, fSample{10, 10}}),
},
{
name: "three in chained overlap complex",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{0, 0}, fSample{2, 2}, fSample{5, 5}, fSample{10, 10}, fSample{15, 15}, fSample{18, 18}, fSample{20, 20}, fSample{25, 25}, fSample{26, 26}, fSample{30, 30}},
[]chunks.Sample{fSample{31, 31}, fSample{35, 35}},
),
},
{
name: "110 overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 110)), // [0 - 110)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 50)), // [60 - 110)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 110),
),
},
{
name: "150 overlapping samples, split chunk",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 90)), // [0 - 90)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 90)), // [90 - 150)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 120),
chunks.GenerateSamples(120, 30),
),
},
{
name: "histogram chunks overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(0), histogramSample(5)}, []chunks.Sample{histogramSample(10), histogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(2), histogramSample(20)}, []chunks.Sample{histogramSample(25), histogramSample(30)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(18), histogramSample(26)}, []chunks.Sample{histogramSample(31), histogramSample(35)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{histogramSample(0), histogramSample(2), histogramSample(5), histogramSample(10), histogramSample(15), histogramSample(18), histogramSample(20), histogramSample(25), histogramSample(26), histogramSample(30)},
[]chunks.Sample{histogramSample(31), histogramSample(35)},
),
},
{
name: "histogram chunks overlapping with float chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(0), histogramSample(5)}, []chunks.Sample{histogramSample(10), histogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{12, 12}}, []chunks.Sample{fSample{14, 14}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{histogramSample(0)},
[]chunks.Sample{fSample{1, 1}},
[]chunks.Sample{histogramSample(5), histogramSample(10)},
[]chunks.Sample{fSample{12, 12}, fSample{14, 14}},
[]chunks.Sample{histogramSample(15)},
),
},
{
name: "float histogram chunks overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(2), floatHistogramSample(20)}, []chunks.Sample{floatHistogramSample(25), floatHistogramSample(30)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(18), floatHistogramSample(26)}, []chunks.Sample{floatHistogramSample(31), floatHistogramSample(35)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0), floatHistogramSample(2), floatHistogramSample(5), floatHistogramSample(10), floatHistogramSample(15), floatHistogramSample(18), floatHistogramSample(20), floatHistogramSample(25), floatHistogramSample(26), floatHistogramSample(30)},
[]chunks.Sample{floatHistogramSample(31), floatHistogramSample(35)},
),
},
{
name: "float histogram chunks overlapping with float chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{12, 12}}, []chunks.Sample{fSample{14, 14}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0)},
[]chunks.Sample{fSample{1, 1}},
[]chunks.Sample{floatHistogramSample(5), floatHistogramSample(10)},
[]chunks.Sample{fSample{12, 12}, fSample{14, 14}},
[]chunks.Sample{floatHistogramSample(15)},
),
},
{
name: "float histogram chunks overlapping with histogram chunks",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{floatHistogramSample(0), floatHistogramSample(5)}, []chunks.Sample{floatHistogramSample(10), floatHistogramSample(15)}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{histogramSample(1), histogramSample(12)}, []chunks.Sample{histogramSample(14)}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{floatHistogramSample(0)},
[]chunks.Sample{histogramSample(1)},
[]chunks.Sample{floatHistogramSample(5), floatHistogramSample(10)},
[]chunks.Sample{histogramSample(12), histogramSample(14)},
[]chunks.Sample{floatHistogramSample(15)},
),
},
} {
t.Run(tc.name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
actSamples := chunks.ChunkMetasToSamples(actChks)
expSamples := chunks.ChunkMetasToSamples(expChks)
require.Equal(t, expSamples, actSamples)
})
}
}
func TestCompactingChunkSeriesMergerHistogramCounterResetHint(t *testing.T) {
m := NewCompactingChunkSeriesMerger(ChainedSeriesMerge)
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []ChunkSeries
expected ChunkSeries
}{
"histogram counter reset hint kept in single series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
"histogram not counter reset hint kept in single series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
"histogram counter reset hint kept in multiple equal series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
},
"histogram not counter reset hint kept in multiple equal series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
},
"histogram counter reset hint dropped from differing series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, cr), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, cr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, uk), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
"histogram counter not reset hint dropped from differing series": {
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(15, uk)},
),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, nr), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{sampleFunc(0, nr), sampleFunc(5, uk)},
[]chunks.Sample{sampleFunc(10, uk), sampleFunc(12, uk), sampleFunc(15, uk)},
),
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
actSamples := chunks.ChunkMetasToSamples(actChks)
expSamples := chunks.ChunkMetasToSamples(expChks)
require.Equal(t, expSamples, actSamples)
})
}
}
}
func TestConcatenatingChunkSeriesMerger(t *testing.T) {
m := NewConcatenatingChunkSeriesMerger()
for _, tc := range []struct {
name string
input []ChunkSeries
expected ChunkSeries
}{
{
name: "single empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
{
name: "single series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}}),
},
{
name: "two empty series",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), nil, nil),
},
{
name: "two non overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{5, 5}}, []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
{
name: "two overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}}, []chunks.Sample{fSample{3, 3}, fSample{8, 8}},
[]chunks.Sample{fSample{7, 7}, fSample{9, 9}}, []chunks.Sample{fSample{10, 10}},
),
},
{
name: "two duplicated",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
),
},
{
name: "three overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{4, 4}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{2, 2}, fSample{3, 3}, fSample{6, 6}},
[]chunks.Sample{fSample{0, 0}, fSample{4, 4}},
),
},
{
name: "three in chained overlap",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{4, 4}, fSample{6, 66}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{6, 6}, fSample{10, 10}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{1, 1}, fSample{2, 2}, fSample{3, 3}, fSample{5, 5}},
[]chunks.Sample{fSample{4, 4}, fSample{6, 66}},
[]chunks.Sample{fSample{6, 6}, fSample{10, 10}},
),
},
{
name: "three in chained overlap complex",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}}),
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), []chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}}),
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
[]chunks.Sample{fSample{0, 0}, fSample{5, 5}}, []chunks.Sample{fSample{10, 10}, fSample{15, 15}},
[]chunks.Sample{fSample{2, 2}, fSample{20, 20}}, []chunks.Sample{fSample{25, 25}, fSample{30, 30}},
[]chunks.Sample{fSample{18, 18}, fSample{26, 26}}, []chunks.Sample{fSample{31, 31}, fSample{35, 35}},
),
},
{
name: "110 overlapping",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 110)), // [0 - 110)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 50)), // [60 - 110)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 110),
chunks.GenerateSamples(60, 50),
),
},
{
name: "150 overlapping samples, simply concatenated and no splits",
input: []ChunkSeries{
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(0, 90)), // [0 - 90)
NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"), chunks.GenerateSamples(60, 90)), // [90 - 150)
},
expected: NewListChunkSeriesFromSamples(labels.FromStrings("bar", "baz"),
chunks.GenerateSamples(0, 90),
chunks.GenerateSamples(60, 90),
),
},
} {
t.Run(tc.name, func(t *testing.T) {
merged := m(tc.input...)
require.Equal(t, tc.expected.Labels(), merged.Labels())
actChks, actErr := ExpandChunks(merged.Iterator(nil))
expChks, expErr := ExpandChunks(tc.expected.Iterator(nil))
require.Equal(t, expErr, actErr)
require.Equal(t, expChks, actChks)
})
}
}
func TestConcatenatingChunkIterator(t *testing.T) {
chunk1, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 1, f: 10}})
require.NoError(t, err)
chunk2, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 2, f: 20}})
require.NoError(t, err)
chunk3, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 3, f: 30}})
require.NoError(t, err)
testError := errors.New("something went wrong")
testCases := map[string]struct {
iterators []chunks.Iterator
expectedChunks []chunks.Meta
expectedError error
}{
"many successful iterators": {
iterators: []chunks.Iterator{
NewListChunkSeriesIterator(chunk1, chunk2),
NewListChunkSeriesIterator(chunk3),
},
expectedChunks: []chunks.Meta{chunk1, chunk2, chunk3},
},
"single failing iterator": {
iterators: []chunks.Iterator{
errChunksIterator{err: testError},
},
expectedError: testError,
},
"some failing and some successful iterators": {
iterators: []chunks.Iterator{
NewListChunkSeriesIterator(chunk1, chunk2),
errChunksIterator{err: testError},
NewListChunkSeriesIterator(chunk3),
},
expectedChunks: []chunks.Meta{chunk1, chunk2}, // Should stop before advancing to last iterator.
expectedError: testError,
},
}
for name, testCase := range testCases {
t.Run(name, func(t *testing.T) {
it := concatenatingChunkIterator{iterators: testCase.iterators}
var chks []chunks.Meta
for it.Next() {
chks = append(chks, it.At())
}
require.Equal(t, testCase.expectedChunks, chks)
if testCase.expectedError == nil {
require.NoError(t, it.Err())
} else {
require.EqualError(t, it.Err(), testCase.expectedError.Error())
}
})
}
}
type mockQuerier struct {
LabelQuerier
toReturn []Series
}
type seriesByLabel []Series
func (a seriesByLabel) Len() int { return len(a) }
func (a seriesByLabel) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a seriesByLabel) Less(i, j int) bool { return labels.Compare(a[i].Labels(), a[j].Labels()) < 0 }
func (m *mockQuerier) Select(_ context.Context, sortSeries bool, _ *SelectHints, _ ...*labels.Matcher) SeriesSet {
cpy := make([]Series, len(m.toReturn))
copy(cpy, m.toReturn)
if sortSeries {
sort.Sort(seriesByLabel(cpy))
}
return NewMockSeriesSet(cpy...)
}
type mockChunkQurier struct {
LabelQuerier
toReturn []ChunkSeries
}
type chunkSeriesByLabel []ChunkSeries
func (a chunkSeriesByLabel) Len() int { return len(a) }
func (a chunkSeriesByLabel) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a chunkSeriesByLabel) Less(i, j int) bool {
return labels.Compare(a[i].Labels(), a[j].Labels()) < 0
}
func (m *mockChunkQurier) Select(_ context.Context, sortSeries bool, _ *SelectHints, _ ...*labels.Matcher) ChunkSeriesSet {
cpy := make([]ChunkSeries, len(m.toReturn))
copy(cpy, m.toReturn)
if sortSeries {
sort.Sort(chunkSeriesByLabel(cpy))
}
return NewMockChunkSeriesSet(cpy...)
}
type mockSeriesSet struct {
idx int
series []Series
}
func NewMockSeriesSet(series ...Series) SeriesSet {
return &mockSeriesSet{
idx: -1,
series: series,
}
}
func (m *mockSeriesSet) Next() bool {
m.idx++
return m.idx < len(m.series)
}
func (m *mockSeriesSet) At() Series { return m.series[m.idx] }
func (m *mockSeriesSet) Err() error { return nil }
func (m *mockSeriesSet) Warnings() annotations.Annotations { return nil }
type mockChunkSeriesSet struct {
idx int
series []ChunkSeries
}
func NewMockChunkSeriesSet(series ...ChunkSeries) ChunkSeriesSet {
return &mockChunkSeriesSet{
idx: -1,
series: series,
}
}
func (m *mockChunkSeriesSet) Next() bool {
m.idx++
return m.idx < len(m.series)
}
func (m *mockChunkSeriesSet) At() ChunkSeries { return m.series[m.idx] }
func (m *mockChunkSeriesSet) Err() error { return nil }
func (m *mockChunkSeriesSet) Warnings() annotations.Annotations { return nil }
func TestChainSampleIterator(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64) chunks.Sample{
"float": func(ts int64) chunks.Sample { return fSample{ts, float64(ts)} },
"histogram": func(ts int64) chunks.Sample { return histogramSample(ts, uk) },
"float histogram": func(ts int64) chunks.Sample { return floatHistogramSample(ts, uk) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(1), sampleFunc(4)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(5)}),
},
expected: []chunks.Sample{
sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3), sampleFunc(4), sampleFunc(5),
},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(2)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
NewListSeriesIterator(samples{}),
NewListSeriesIterator(samples{}),
NewListSeriesIterator(samples{}),
},
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual, err := ExpandSamples(merged, nil)
require.NoError(t, err)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorHistogramCounterResetHint(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, uk)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, cr), sampleFunc(2, uk)},
},
"single iterator gauge": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga)}),
},
expected: []chunks.Sample{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga)},
},
"overlapping iterators gauge": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga), sampleFunc(4, ga)}),
NewListSeriesIterator(samples{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(3, ga), sampleFunc(5, ga)}),
},
expected: []chunks.Sample{sampleFunc(0, ga), sampleFunc(1, ga), sampleFunc(2, ga), sampleFunc(3, ga), sampleFunc(4, ga), sampleFunc(5, ga)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, uk), sampleFunc(3, cr)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(3, uk), sampleFunc(5, cr)}),
NewListSeriesIterator(samples{sampleFunc(1, uk), sampleFunc(2, cr), sampleFunc(4, cr)}),
},
expected: []chunks.Sample{
sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, cr), sampleFunc(3, uk), sampleFunc(4, uk), sampleFunc(5, uk),
},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, cr)}),
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, cr)}),
},
expected: []chunks.Sample{sampleFunc(0, uk), sampleFunc(1, uk), sampleFunc(2, uk)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual, err := ExpandSamples(merged, nil)
require.NoError(t, err)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorSeek(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64) chunks.Sample{
"float": func(ts int64) chunks.Sample { return fSample{ts, float64(ts)} },
"histogram": func(ts int64) chunks.Sample { return histogramSample(ts, uk) },
"float histogram": func(ts int64) chunks.Sample { return floatHistogramSample(ts, uk) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
seek int64
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1), sampleFunc(2)}),
},
seek: 1,
expected: []chunks.Sample{sampleFunc(1), sampleFunc(2)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(3)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2), sampleFunc(3)},
},
"overlapping but distinct iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(1), sampleFunc(4)}),
NewListSeriesIterator(samples{sampleFunc(2), sampleFunc(5)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2), sampleFunc(3), sampleFunc(4), sampleFunc(5)},
},
"overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(2), sampleFunc(3)}),
NewListSeriesIterator(samples{sampleFunc(0), sampleFunc(1), sampleFunc(2)}),
},
seek: 0,
expected: []chunks.Sample{sampleFunc(0), sampleFunc(1), sampleFunc(2), sampleFunc(3)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual := []chunks.Sample{}
switch merged.Seek(tc.seek) {
case chunkenc.ValFloat:
t, f := merged.At()
actual = append(actual, fSample{t, f})
case chunkenc.ValHistogram:
t, h := merged.AtHistogram(nil)
actual = append(actual, hSample{t, h})
case chunkenc.ValFloatHistogram:
t, fh := merged.AtFloatHistogram(nil)
actual = append(actual, fhSample{t, fh})
}
s, err := ExpandSamples(merged, nil)
require.NoError(t, err)
actual = append(actual, s...)
require.Equal(t, tc.expected, actual)
})
}
}
}
func TestChainSampleIteratorSeekFailingIterator(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
errIterator{errors.New("something went wrong")},
})
require.Equal(t, chunkenc.ValNone, merged.Seek(0))
require.EqualError(t, merged.Err(), "something went wrong")
}
func TestChainSampleIteratorNextImmediatelyFailingIterator(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
errIterator{errors.New("something went wrong")},
})
require.Equal(t, chunkenc.ValNone, merged.Next())
require.EqualError(t, merged.Err(), "something went wrong")
// Next() does some special handling for the first iterator, so make sure it handles the first iterator returning an error too.
merged = ChainSampleIteratorFromIterators(nil, []chunkenc.Iterator{
errIterator{errors.New("something went wrong")},
NewListSeriesIterator(samples{fSample{0, 0.1}, fSample{1, 1.1}, fSample{2, 2.1}}),
})
require.Equal(t, chunkenc.ValNone, merged.Next())
require.EqualError(t, merged.Err(), "something went wrong")
}
func TestChainSampleIteratorSeekHistogramCounterResetHint(t *testing.T) {
for sampleType, sampleFunc := range map[string]func(int64, histogram.CounterResetHint) chunks.Sample{
"histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return histogramSample(ts, hint) },
"float histogram": func(ts int64, hint histogram.CounterResetHint) chunks.Sample { return floatHistogramSample(ts, hint) },
} {
for name, tc := range map[string]struct {
input []chunkenc.Iterator
seek int64
expected []chunks.Sample
}{
"single iterator": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, cr), sampleFunc(2, uk)}),
},
seek: 1,
expected: []chunks.Sample{sampleFunc(1, uk), sampleFunc(2, uk)},
},
"non overlapping iterators": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
seek: 2,
expected: []chunks.Sample{sampleFunc(2, uk), sampleFunc(3, cr)},
},
"non overlapping iterators seek to internal reset": {
input: []chunkenc.Iterator{
NewListSeriesIterator(samples{sampleFunc(0, cr), sampleFunc(1, uk)}),
NewListSeriesIterator(samples{sampleFunc(2, cr), sampleFunc(3, cr)}),
},
seek: 3,
expected: []chunks.Sample{sampleFunc(3, uk)},
},
} {
t.Run(sampleType+"/"+name, func(t *testing.T) {
merged := ChainSampleIteratorFromIterators(nil, tc.input)
actual := []chunks.Sample{}
switch merged.Seek(tc.seek) {
case chunkenc.ValFloat:
t, f := merged.At()
actual = append(actual, fSample{t, f})
case chunkenc.ValHistogram:
t, h := merged.AtHistogram(nil)
actual = append(actual, hSample{t, h})
case chunkenc.ValFloatHistogram:
t, fh := merged.AtFloatHistogram(nil)
actual = append(actual, fhSample{t, fh})
}
s, err := ExpandSamples(merged, nil)
require.NoError(t, err)
actual = append(actual, s...)
require.Equal(t, tc.expected, actual)
})
}
}
}
func makeSeries(numSeries, numSamples int) []Series {
series := []Series{}
for j := 0; j < numSeries; j++ {
labels := labels.FromStrings("foo", fmt.Sprintf("bar%d", j))
samples := []chunks.Sample{}
for k := 0; k < numSamples; k++ {
samples = append(samples, fSample{t: int64(k), f: float64(k)})
}
series = append(series, NewListSeries(labels, samples))
}
return series
}
func makeMergeSeriesSet(serieses [][]Series) SeriesSet {
seriesSets := make([]genericSeriesSet, len(serieses))
for i, s := range serieses {
seriesSets[i] = &genericSeriesSetAdapter{NewMockSeriesSet(s...)}
}
return &seriesSetAdapter{newGenericMergeSeriesSet(seriesSets, (&seriesMergerAdapter{VerticalSeriesMergeFunc: ChainedSeriesMerge}).Merge)}
}
func benchmarkDrain(b *testing.B, makeSeriesSet func() SeriesSet) {
var err error
var t int64
var v float64
var iter chunkenc.Iterator
for n := 0; n < b.N; n++ {
seriesSet := makeSeriesSet()
for seriesSet.Next() {
iter = seriesSet.At().Iterator(iter)
for iter.Next() == chunkenc.ValFloat {
t, v = iter.At()
}
err = iter.Err()
}
require.NoError(b, err)
require.NotEqual(b, t, v) // To ensure the inner loop doesn't get optimised away.
}
}
func BenchmarkNoMergeSeriesSet_100_100(b *testing.B) {
series := makeSeries(100, 100)
benchmarkDrain(b, func() SeriesSet { return NewMockSeriesSet(series...) })
}
func BenchmarkMergeSeriesSet(b *testing.B) {
for _, bm := range []struct {
numSeriesSets, numSeries, numSamples int
}{
{1, 100, 100},
{10, 100, 100},
{100, 100, 100},
} {
serieses := [][]Series{}
for i := 0; i < bm.numSeriesSets; i++ {
serieses = append(serieses, makeSeries(bm.numSeries, bm.numSamples))
}
b.Run(fmt.Sprintf("%d_%d_%d", bm.numSeriesSets, bm.numSeries, bm.numSamples), func(b *testing.B) {
benchmarkDrain(b, func() SeriesSet { return makeMergeSeriesSet(serieses) })
})
}
}
type mockGenericQuerier struct {
mtx sync.Mutex
closed bool
labelNamesCalls int
labelNamesRequested []labelNameRequest
sortedSeriesRequested []bool
resp []string
warnings annotations.Annotations
err error
}
type labelNameRequest struct {
name string
matchers []*labels.Matcher
}
func (m *mockGenericQuerier) Select(_ context.Context, b bool, _ *SelectHints, _ ...*labels.Matcher) genericSeriesSet {
m.mtx.Lock()
m.sortedSeriesRequested = append(m.sortedSeriesRequested, b)
m.mtx.Unlock()
return &mockGenericSeriesSet{resp: m.resp, warnings: m.warnings, err: m.err}
}
func (m *mockGenericQuerier) LabelValues(_ context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesRequested = append(m.labelNamesRequested, labelNameRequest{
name: name,
matchers: matchers,
})
m.mtx.Unlock()
return m.resp, m.warnings, m.err
}
func (m *mockGenericQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesCalls++
m.mtx.Unlock()
return m.resp, m.warnings, m.err
}
func (m *mockGenericQuerier) Close() error {
m.closed = true
return nil
}
type mockGenericSeriesSet struct {
resp []string
warnings annotations.Annotations
err error
curr int
}
func (m *mockGenericSeriesSet) Next() bool {
if m.err != nil {
return false
}
if m.curr >= len(m.resp) {
return false
}
m.curr++
return true
}
func (m *mockGenericSeriesSet) Err() error { return m.err }
func (m *mockGenericSeriesSet) Warnings() annotations.Annotations { return m.warnings }
func (m *mockGenericSeriesSet) At() Labels {
return mockLabels(m.resp[m.curr-1])
}
type mockLabels string
func (l mockLabels) Labels() labels.Labels {
return labels.FromStrings("test", string(l))
}
func unwrapMockGenericQuerier(t *testing.T, qr genericQuerier) *mockGenericQuerier {
m, ok := qr.(*mockGenericQuerier)
if !ok {
s, ok := qr.(*secondaryQuerier)
require.True(t, ok, "expected secondaryQuerier got something else")
m, ok = s.genericQuerier.(*mockGenericQuerier)
require.True(t, ok, "expected mockGenericQuerier got something else")
}
return m
}
func TestMergeGenericQuerierWithSecondaries_ErrorHandling(t *testing.T) {
var (
errStorage = errors.New("storage error")
warnStorage = errors.New("storage warning")
ctx = context.Background()
)
for _, tcase := range []struct {
name string
queriers []genericQuerier
expectedSelectsSeries []labels.Labels
expectedLabels []string
expectedWarnings annotations.Annotations
expectedErrs [4]error
}{
{
name: "one successful primary querier",
queriers: []genericQuerier{&mockGenericQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil}},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
},
expectedLabels: []string{"a", "b"},
},
{
name: "multiple successful primary queriers",
queriers: []genericQuerier{
&mockGenericQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil},
&mockGenericQuerier{resp: []string{"b", "c"}, warnings: nil, err: nil},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"a", "b", "c"},
},
{
name: "one failed primary querier",
queriers: []genericQuerier{&mockGenericQuerier{warnings: nil, err: errStorage}},
expectedErrs: [4]error{errStorage, errStorage, errStorage, errStorage},
},
{
name: "one successful primary querier with successful secondaries",
queriers: []genericQuerier{
&mockGenericQuerier{resp: []string{"a", "b"}, warnings: nil, err: nil},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"b"}, warnings: nil, err: nil}},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"c"}, warnings: nil, err: nil}},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"a", "b", "c"},
},
{
name: "one successful primary querier with empty response and successful secondaries",
queriers: []genericQuerier{
&mockGenericQuerier{resp: []string{}, warnings: nil, err: nil},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"b"}, warnings: nil, err: nil}},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"c"}, warnings: nil, err: nil}},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "b"),
labels.FromStrings("test", "c"),
},
expectedLabels: []string{"b", "c"},
},
{
name: "one failed primary querier with successful secondaries",
queriers: []genericQuerier{
&mockGenericQuerier{warnings: nil, err: errStorage},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"b"}, warnings: nil, err: nil}},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"c"}, warnings: nil, err: nil}},
},
expectedErrs: [4]error{errStorage, errStorage, errStorage, errStorage},
},
{
name: "one successful primary querier with failed secondaries",
queriers: []genericQuerier{
&mockGenericQuerier{resp: []string{"a"}, warnings: nil, err: nil},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"b"}, warnings: nil, err: errStorage}},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"c"}, warnings: nil, err: errStorage}},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
},
expectedLabels: []string{"a"},
expectedWarnings: annotations.New().Add(errStorage),
},
{
name: "successful queriers with warnings",
queriers: []genericQuerier{
&mockGenericQuerier{resp: []string{"a"}, warnings: annotations.New().Add(warnStorage), err: nil},
&secondaryQuerier{genericQuerier: &mockGenericQuerier{resp: []string{"b"}, warnings: annotations.New().Add(warnStorage), err: nil}},
},
expectedSelectsSeries: []labels.Labels{
labels.FromStrings("test", "a"),
labels.FromStrings("test", "b"),
},
expectedLabels: []string{"a", "b"},
expectedWarnings: annotations.New().Add(warnStorage),
},
} {
t.Run(tcase.name, func(t *testing.T) {
q := &mergeGenericQuerier{
queriers: tcase.queriers,
mergeFn: func(l ...Labels) Labels { return l[0] },
}
t.Run("Select", func(t *testing.T) {
res := q.Select(context.Background(), false, nil)
var lbls []labels.Labels
for res.Next() {
lbls = append(lbls, res.At().Labels())
}
require.Subset(t, tcase.expectedWarnings, res.Warnings())
require.Equal(t, tcase.expectedErrs[0], res.Err())
require.ErrorIs(t, res.Err(), tcase.expectedErrs[0], "expected error doesn't match")
require.Equal(t, tcase.expectedSelectsSeries, lbls)
for _, qr := range q.queriers {
m := unwrapMockGenericQuerier(t, qr)
exp := []bool{true}
if len(q.queriers) == 1 {
exp[0] = false
}
require.Equal(t, exp, m.sortedSeriesRequested)
}
})
t.Run("LabelNames", func(t *testing.T) {
res, w, err := q.LabelNames(ctx)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[1], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)
if err != nil {
return
}
for _, qr := range q.queriers {
m := unwrapMockGenericQuerier(t, qr)
require.Equal(t, 1, m.labelNamesCalls)
}
})
t.Run("LabelValues", func(t *testing.T) {
res, w, err := q.LabelValues(ctx, "test")
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[2], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)
if err != nil {
return
}
for _, qr := range q.queriers {
m := unwrapMockGenericQuerier(t, qr)
require.Equal(t, []labelNameRequest{{name: "test"}}, m.labelNamesRequested)
}
})
t.Run("LabelValuesWithMatchers", func(t *testing.T) {
matcher := labels.MustNewMatcher(labels.MatchEqual, "otherLabel", "someValue")
res, w, err := q.LabelValues(ctx, "test2", matcher)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[3], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)
if err != nil {
return
}
for _, qr := range q.queriers {
m := unwrapMockGenericQuerier(t, qr)
require.Equal(t, []labelNameRequest{
{name: "test"},
{name: "test2", matchers: []*labels.Matcher{matcher}},
}, m.labelNamesRequested)
}
})
})
}
}
type errIterator struct {
err error
}
func (e errIterator) Next() chunkenc.ValueType {
return chunkenc.ValNone
}
func (e errIterator) Seek(t int64) chunkenc.ValueType {
return chunkenc.ValNone
}
func (e errIterator) At() (int64, float64) {
return 0, 0
}
func (e errIterator) AtHistogram(*histogram.Histogram) (int64, *histogram.Histogram) {
return 0, nil
}
func (e errIterator) AtFloatHistogram(*histogram.FloatHistogram) (int64, *histogram.FloatHistogram) {
return 0, nil
}
func (e errIterator) AtT() int64 {
return 0
}
func (e errIterator) Err() error {
return e.err
}
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