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98ecdf3589
Iterator may share spans without copy, so we always have to make a copy before modification - copy-on-write. Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
1536 lines
48 KiB
Go
1536 lines
48 KiB
Go
// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package chunkenc
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import (
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/tsdb/tsdbutil"
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)
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type result struct {
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t int64
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h *histogram.Histogram
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fh *histogram.FloatHistogram
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}
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func TestFirstHistogramExplicitCounterReset(t *testing.T) {
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tests := map[string]struct {
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hint histogram.CounterResetHint
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expHeader CounterResetHeader
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}{
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"CounterReset": {
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hint: histogram.CounterReset,
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expHeader: CounterReset,
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},
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"NotCounterReset": {
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hint: histogram.NotCounterReset,
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expHeader: UnknownCounterReset,
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},
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"UnknownCounterReset": {
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hint: histogram.UnknownCounterReset,
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expHeader: UnknownCounterReset,
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},
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"Gauge": {
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hint: histogram.GaugeType,
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expHeader: GaugeType,
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},
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}
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for name, test := range tests {
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t.Run(name, func(t *testing.T) {
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h := &histogram.Histogram{
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CounterResetHint: test.hint,
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}
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chk := NewHistogramChunk()
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app, err := chk.Appender()
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require.NoError(t, err)
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newChk, recoded, newApp, err := app.AppendHistogram(nil, 0, h, false)
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require.NoError(t, err)
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require.Nil(t, newChk)
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require.False(t, recoded)
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require.Equal(t, app, newApp)
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require.Equal(t, test.expHeader, chk.GetCounterResetHeader())
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})
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}
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}
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func TestHistogramChunkSameBuckets(t *testing.T) {
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c := NewHistogramChunk()
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var exp []result
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// Create fresh appender and add the first histogram.
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app, err := c.Appender()
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require.NoError(t, err)
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require.Equal(t, 0, c.NumSamples())
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ts := int64(1234567890)
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h := &histogram.Histogram{
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Count: 15,
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ZeroCount: 2,
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Sum: 18.4,
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ZeroThreshold: 1e-100,
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Schema: 1,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 1, Length: 2},
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},
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PositiveBuckets: []int64{1, 1, -1, 0}, // counts: 1, 2, 1, 1 (total 5)
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NegativeSpans: []histogram.Span{
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{Offset: 1, Length: 1},
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{Offset: 2, Length: 3},
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},
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NegativeBuckets: []int64{2, 1, -1, -1}, // counts: 2, 3, 2, 1 (total 8)
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}
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chk, _, app, err := app.AppendHistogram(nil, ts, h, false)
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require.NoError(t, err)
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require.Nil(t, chk)
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exp = append(exp, result{t: ts, h: h, fh: h.ToFloat(nil)})
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require.Equal(t, 1, c.NumSamples())
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// Add an updated histogram.
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ts += 16
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h = h.Copy()
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h.Count = 32
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h.ZeroCount++
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h.Sum = 24.4
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h.PositiveBuckets = []int64{5, -2, 1, -2} // counts: 5, 3, 4, 2 (total 14)
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h.NegativeBuckets = []int64{4, -1, 1, -1} // counts: 4, 3, 4, 4 (total 15)
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chk, _, _, err = app.AppendHistogram(nil, ts, h, false)
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require.NoError(t, err)
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require.Nil(t, chk)
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hExp := h.Copy()
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hExp.CounterResetHint = histogram.NotCounterReset
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exp = append(exp, result{t: ts, h: hExp, fh: hExp.ToFloat(nil)})
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require.Equal(t, 2, c.NumSamples())
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// Add update with new appender.
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app, err = c.Appender()
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require.NoError(t, err)
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ts += 14
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h = h.Copy()
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h.Count = 54
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h.ZeroCount += 2
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h.Sum = 24.4
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h.PositiveBuckets = []int64{6, 1, -3, 6} // counts: 6, 7, 4, 10 (total 27)
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h.NegativeBuckets = []int64{5, 1, -2, 3} // counts: 5, 6, 4, 7 (total 22)
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chk, _, _, err = app.AppendHistogram(nil, ts, h, false)
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require.NoError(t, err)
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require.Nil(t, chk)
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hExp = h.Copy()
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hExp.CounterResetHint = histogram.NotCounterReset
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exp = append(exp, result{t: ts, h: hExp, fh: hExp.ToFloat(nil)})
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require.Equal(t, 3, c.NumSamples())
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// 1. Expand iterator in simple case.
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it := c.Iterator(nil)
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require.NoError(t, it.Err())
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var act []result
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for it.Next() == ValHistogram {
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ts, h := it.AtHistogram(nil)
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fts, fh := it.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act = append(act, result{t: ts, h: h, fh: fh})
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}
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require.NoError(t, it.Err())
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require.Equal(t, exp, act)
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// 2. Expand second iterator while reusing first one.
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it2 := c.Iterator(it)
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var act2 []result
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for it2.Next() == ValHistogram {
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ts, h := it2.AtHistogram(nil)
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fts, fh := it2.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act2 = append(act2, result{t: ts, h: h, fh: fh})
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}
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require.NoError(t, it2.Err())
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require.Equal(t, exp, act2)
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// 3. Now recycle an iterator that was never used to access anything.
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itX := c.Iterator(nil)
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for itX.Next() == ValHistogram {
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// Just iterate through without accessing anything.
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}
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it3 := c.iterator(itX)
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var act3 []result
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for it3.Next() == ValHistogram {
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ts, h := it3.AtHistogram(nil)
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fts, fh := it3.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act3 = append(act3, result{t: ts, h: h, fh: fh})
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}
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require.NoError(t, it3.Err())
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require.Equal(t, exp, act3)
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// 4. Test iterator Seek.
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mid := len(exp) / 2
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it4 := c.Iterator(nil)
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var act4 []result
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require.Equal(t, ValHistogram, it4.Seek(exp[mid].t))
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// Below ones should not matter.
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require.Equal(t, ValHistogram, it4.Seek(exp[mid].t))
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require.Equal(t, ValHistogram, it4.Seek(exp[mid].t))
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ts, h = it4.AtHistogram(nil)
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fts, fh := it4.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act4 = append(act4, result{t: ts, h: h, fh: fh})
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for it4.Next() == ValHistogram {
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ts, h := it4.AtHistogram(nil)
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fts, fh := it4.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act4 = append(act4, result{t: ts, h: h, fh: fh})
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}
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require.NoError(t, it4.Err())
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require.Equal(t, exp[mid:], act4)
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require.Equal(t, ValNone, it4.Seek(exp[len(exp)-1].t+1))
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}
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// Mimics the scenario described for expandSpansForward.
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func TestHistogramChunkBucketChanges(t *testing.T) {
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c := Chunk(NewHistogramChunk())
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// Create fresh appender and add the first histogram.
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app, err := c.Appender()
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require.NoError(t, err)
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require.Equal(t, 0, c.NumSamples())
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ts1 := int64(1234567890)
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h1 := &histogram.Histogram{
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Count: 27,
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ZeroCount: 2,
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Sum: 18.4,
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ZeroThreshold: 1e-125,
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Schema: 1,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 2, Length: 1},
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{Offset: 3, Length: 2},
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{Offset: 3, Length: 1},
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{Offset: 1, Length: 1},
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},
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PositiveBuckets: []int64{6, -3, 0, -1, 2, 1, -4}, // counts: 6, 3, 3, 2, 4, 5, 1 (total 24)
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NegativeSpans: []histogram.Span{{Offset: 1, Length: 1}},
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NegativeBuckets: []int64{1},
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}
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chk, _, app, err := app.AppendHistogram(nil, ts1, h1, false)
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require.NoError(t, err)
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require.Nil(t, chk)
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require.Equal(t, 1, c.NumSamples())
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// Add a new histogram that has expanded buckets.
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ts2 := ts1 + 16
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h2 := h1.Copy()
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h2.PositiveSpans = []histogram.Span{
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{Offset: 0, Length: 3},
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{Offset: 1, Length: 1},
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{Offset: 1, Length: 4},
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{Offset: 3, Length: 3},
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}
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h2.NegativeSpans = []histogram.Span{{Offset: 0, Length: 2}}
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h2.Count = 35
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h2.ZeroCount++
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h2.Sum = 30
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// Existing histogram should get values converted from the above to:
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// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
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// so the new histogram should have new counts >= these per-bucket counts, e.g.:
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h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // 7 5 1 3 1 0 2 5 5 0 1 (total 30)
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// Existing histogram should get values converted from the above to:
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// 0 1 (previous values with some new empty buckets in between)
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// so the new histogram should have new counts >= these per-bucket counts, e.g.:
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h2.NegativeBuckets = []int64{2, -1} // 2 1 (total 3)
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// This is how span changes will be handled.
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hApp, _ := app.(*HistogramAppender)
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posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
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require.NotEmpty(t, posInterjections)
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require.NotEmpty(t, negInterjections)
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require.Empty(t, backwardPositiveInserts)
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require.Empty(t, backwardNegativeInserts)
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require.True(t, ok) // Only new buckets came in.
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require.False(t, cr)
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c, app = hApp.recode(posInterjections, negInterjections, h2.PositiveSpans, h2.NegativeSpans)
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chk, _, _, err = app.AppendHistogram(nil, ts2, h2, false)
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require.NoError(t, err)
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require.Nil(t, chk)
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require.Equal(t, 2, c.NumSamples())
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// Because the 2nd histogram has expanded buckets, we should expect all
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// histograms (in particular the first) to come back using the new spans
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// metadata as well as the expanded buckets.
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h1.PositiveSpans = h2.PositiveSpans
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h1.PositiveBuckets = []int64{6, -3, -3, 3, -3, 0, 2, 2, 1, -5, 1}
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h1.NegativeSpans = h2.NegativeSpans
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h1.NegativeBuckets = []int64{0, 1}
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hExp := h2.Copy()
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hExp.CounterResetHint = histogram.NotCounterReset
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exp := []result{
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{t: ts1, h: h1, fh: h1.ToFloat(nil)},
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{t: ts2, h: hExp, fh: hExp.ToFloat(nil)},
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}
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it := c.Iterator(nil)
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var act []result
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for it.Next() == ValHistogram {
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ts, h := it.AtHistogram(nil)
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fts, fh := it.AtFloatHistogram(nil)
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require.Equal(t, ts, fts)
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act = append(act, result{t: ts, h: h, fh: fh})
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}
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require.NoError(t, it.Err())
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require.Equal(t, exp, act)
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}
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func TestHistogramChunkAppendable(t *testing.T) {
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eh := &histogram.Histogram{
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Count: 5,
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ZeroCount: 2,
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Sum: 18.4,
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ZeroThreshold: 1e-125,
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Schema: 1,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 2, Length: 1},
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{Offset: 3, Length: 2},
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{Offset: 3, Length: 1},
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{Offset: 1, Length: 1},
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},
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PositiveBuckets: []int64{6, -3, 0, -1, 2, 1, -4}, // counts: 6, 3, 3, 2, 4, 5, 1 (total 24)
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}
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cbh := &histogram.Histogram{
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Count: 24,
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Sum: 18.4,
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Schema: histogram.CustomBucketsSchema,
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PositiveSpans: []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 2, Length: 1},
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{Offset: 3, Length: 2},
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{Offset: 3, Length: 1},
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{Offset: 1, Length: 1},
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},
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PositiveBuckets: []int64{6, -3, 0, -1, 2, 1, -4}, // counts: 6, 3, 3, 2, 4, 5, 1 (total 24)
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CustomValues: []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20},
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}
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setup := func(h *histogram.Histogram) (Chunk, *HistogramAppender, int64, *histogram.Histogram) {
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c := Chunk(NewHistogramChunk())
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// Create fresh appender and add the first histogram.
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app, err := c.Appender()
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require.NoError(t, err)
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require.Equal(t, 0, c.NumSamples())
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ts := int64(1234567890)
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chk, _, app, err := app.AppendHistogram(nil, ts, h.Copy(), false)
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require.NoError(t, err)
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require.Nil(t, chk)
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require.Equal(t, 1, c.NumSamples())
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require.Equal(t, UnknownCounterReset, c.(*HistogramChunk).GetCounterResetHeader())
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return c, app.(*HistogramAppender), ts, h
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}
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{ // Schema change.
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c, hApp, ts, h1 := setup(eh)
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h2 := h1.Copy()
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h2.Schema++
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_, _, _, _, ok, _ := hApp.appendable(h2)
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require.False(t, ok)
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assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
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}
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{ // Zero threshold change.
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c, hApp, ts, h1 := setup(eh)
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h2 := h1.Copy()
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h2.ZeroThreshold += 0.1
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_, _, _, _, ok, _ := hApp.appendable(h2)
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require.False(t, ok)
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assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
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}
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{ // New histogram that has more buckets.
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c, hApp, ts, h1 := setup(eh)
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h2 := h1.Copy()
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h2.PositiveSpans = []histogram.Span{
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{Offset: 0, Length: 3},
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{Offset: 1, Length: 1},
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{Offset: 1, Length: 4},
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{Offset: 3, Length: 3},
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}
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h2.Count += 9
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h2.ZeroCount++
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h2.Sum = 30
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// Existing histogram should get values converted from the above to:
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// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
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// so the new histogram should have new counts >= these per-bucket counts, e.g.:
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h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // 7 5 1 3 1 0 2 5 5 0 1 (total 30)
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posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
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require.NotEmpty(t, posInterjections)
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require.Empty(t, negInterjections)
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require.Empty(t, backwardPositiveInserts)
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require.Empty(t, backwardNegativeInserts)
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require.True(t, ok) // Only new buckets came in.
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require.False(t, cr)
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assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
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}
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{ // New histogram that has a bucket missing.
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c, hApp, ts, h1 := setup(eh)
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h2 := h1.Copy()
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h2.PositiveSpans = []histogram.Span{
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{Offset: 0, Length: 2},
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{Offset: 5, Length: 2},
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{Offset: 3, Length: 1},
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{Offset: 1, Length: 1},
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}
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h2.Sum = 21
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h2.PositiveBuckets = []int64{6, -3, -1, 2, 1, -4} // counts: 6, 3, 2, 4, 5, 1 (total 21)
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posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
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require.Empty(t, posInterjections)
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require.Empty(t, negInterjections)
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require.Empty(t, backwardPositiveInserts)
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require.Empty(t, backwardNegativeInserts)
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require.False(t, ok) // Need to cut a new chunk.
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require.True(t, cr)
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assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
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}
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{ // New histogram that has buckets missing but the buckets missing were empty.
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emptyBucketH := eh.Copy()
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emptyBucketH.PositiveBuckets = []int64{6, -6, 1, 1, -2, 1, 1} // counts: 6, 0, 1, 2, 0, 1, 2 (total 12)
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c, hApp, ts, h1 := setup(emptyBucketH)
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h2 := h1.Copy()
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h2.PositiveSpans = []histogram.Span{ // Missing buckets at offset 1 and 9.
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{Offset: 0, Length: 1},
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{Offset: 3, Length: 1},
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{Offset: 3, Length: 1},
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{Offset: 4, Length: 1},
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{Offset: 1, Length: 1},
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}
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savedH2Spans := h2.PositiveSpans
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h2.PositiveBuckets = []int64{7, -5, 1, 0, 1} // counts: 7, 2, 3, 3, 4 (total 18)
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posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
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require.Empty(t, posInterjections)
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require.Empty(t, negInterjections)
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require.NotEmpty(t, backwardPositiveInserts)
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require.Empty(t, backwardNegativeInserts)
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require.True(t, ok)
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require.False(t, cr)
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|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
|
|
// Check that h2 was recoded.
|
|
require.Equal(t, []int64{7, -7, 2, 1, -3, 3, 1}, h2.PositiveBuckets) // counts: 7, 0, 2, 3 , 0, 3, 4 (total 18)
|
|
require.Equal(t, emptyBucketH.PositiveSpans, h2.PositiveSpans)
|
|
require.NotEqual(t, savedH2Spans, h2.PositiveSpans, "recoding must make a copy")
|
|
}
|
|
|
|
{ // New histogram that has new buckets AND buckets missing but the buckets missing were empty.
|
|
emptyBucketH := eh.Copy()
|
|
emptyBucketH.PositiveBuckets = []int64{6, -6, 1, 1, -2, 1, 1} // counts: 6, 0, 1, 2, 0, 1, 2 (total 12)
|
|
c, hApp, ts, h1 := setup(emptyBucketH)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{ // Missing buckets at offset 1 and 9.
|
|
{Offset: 0, Length: 1},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 4, Length: 1},
|
|
{Offset: 1, Length: 2},
|
|
}
|
|
savedH2Spans := h2.PositiveSpans
|
|
h2.PositiveBuckets = []int64{7, -5, 1, 0, 1, 1} // counts: 7, 2, 3, 3, 4, 5 (total 23)
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.NotEmpty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.NotEmpty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.True(t, ok)
|
|
require.False(t, cr)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
|
|
// Check that h2 was recoded.
|
|
require.Equal(t, []int64{7, -7, 2, 1, -3, 3, 1, 1}, h2.PositiveBuckets) // counts: 7, 0, 2, 3 , 0, 3, 5 (total 23)
|
|
require.Equal(t, []histogram.Span{
|
|
{Offset: 0, Length: 2}, // Added empty bucket.
|
|
{Offset: 2, Length: 1}, // Existing - offset adjusted.
|
|
{Offset: 3, Length: 2}, // Added empty bucket.
|
|
{Offset: 3, Length: 1}, // Existing - offset adjusted.
|
|
{Offset: 1, Length: 2}, // Existing.
|
|
}, h2.PositiveSpans)
|
|
require.NotEqual(t, savedH2Spans, h2.PositiveSpans, "recoding must make a copy")
|
|
}
|
|
|
|
{ // New histogram that has a counter reset while buckets are same.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.Sum = 23
|
|
h2.PositiveBuckets = []int64{6, -4, 1, -1, 2, 1, -4} // counts: 6, 2, 3, 2, 4, 5, 1 (total 23)
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.Empty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.Empty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.False(t, ok) // Need to cut a new chunk.
|
|
require.True(t, cr)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{ // New histogram that has a counter reset while new buckets were added.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Sum = 29
|
|
// Existing histogram should get values converted from the above to:
|
|
// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
|
|
// so the new histogram should have new counts >= these per-bucket counts, e.g.:
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 0} // 7 5 1 3 1 0 2 5 5 0 0 (total 29)
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.Empty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.Empty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.False(t, ok) // Need to cut a new chunk.
|
|
require.True(t, cr)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{
|
|
// New histogram that has a counter reset while new buckets were
|
|
// added before the first bucket and reset on first bucket. (to
|
|
// catch the edge case where the new bucket should be forwarded
|
|
// ahead until first old bucket at start)
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: -3, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
{Offset: 2, Length: 1},
|
|
{Offset: 3, Length: 2},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
}
|
|
h2.Sum = 26
|
|
// Existing histogram should get values converted from the above to:
|
|
// 0, 0, 6, 3, 3, 2, 4, 5, 1
|
|
// so the new histogram should have new counts >= these per-bucket counts, e.g.:
|
|
h2.PositiveBuckets = []int64{1, 1, 3, -2, 0, -1, 2, 1, -4} // counts: 1, 2, 5, 3, 3, 2, 4, 5, 1 (total 26)
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.Empty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.Empty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.False(t, ok) // Need to cut a new chunk.
|
|
require.True(t, cr)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{ // New histogram that has an explicit counter reset.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.CounterResetHint = histogram.CounterReset
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{ // Start new chunk explicitly, and append a new histogram that is considered appendable to the previous chunk.
|
|
_, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy() // Identity is appendable.
|
|
|
|
nextChunk := NewHistogramChunk()
|
|
app, err := nextChunk.Appender()
|
|
require.NoError(t, err)
|
|
newChunk, recoded, newApp, err := app.AppendHistogram(hApp, ts+1, h2, false)
|
|
require.NoError(t, err)
|
|
require.Nil(t, newChunk)
|
|
require.False(t, recoded)
|
|
require.Equal(t, app, newApp)
|
|
assertSampleCount(t, nextChunk, 1, ValHistogram)
|
|
require.Equal(t, NotCounterReset, nextChunk.GetCounterResetHeader())
|
|
}
|
|
|
|
{ // Start new chunk explicitly, and append a new histogram that is not considered appendable to the previous chunk.
|
|
_, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.Count-- // Make this not appendable due to counter reset.
|
|
|
|
nextChunk := NewHistogramChunk()
|
|
app, err := nextChunk.Appender()
|
|
require.NoError(t, err)
|
|
newChunk, recoded, newApp, err := app.AppendHistogram(hApp, ts+1, h2, false)
|
|
require.NoError(t, err)
|
|
require.Nil(t, newChunk)
|
|
require.False(t, recoded)
|
|
require.Equal(t, app, newApp)
|
|
assertSampleCount(t, nextChunk, 1, ValHistogram)
|
|
require.Equal(t, CounterReset, nextChunk.GetCounterResetHeader())
|
|
}
|
|
|
|
{ // Start new chunk explicitly, and append a new histogram that would need recoding if we added it to the chunk.
|
|
_, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Count += 9
|
|
h2.ZeroCount++
|
|
h2.Sum = 30
|
|
// Existing histogram should get values converted from the above to:
|
|
// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
|
|
// so the new histogram should have new counts >= these per-bucket counts, e.g.:
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // 7 5 1 3 1 0 2 5 5 0 1 (total 30)
|
|
|
|
nextChunk := NewHistogramChunk()
|
|
app, err := nextChunk.Appender()
|
|
require.NoError(t, err)
|
|
newChunk, recoded, newApp, err := app.AppendHistogram(hApp, ts+1, h2, false)
|
|
require.NoError(t, err)
|
|
require.Nil(t, newChunk)
|
|
require.False(t, recoded)
|
|
require.Equal(t, app, newApp)
|
|
assertSampleCount(t, nextChunk, 1, ValHistogram)
|
|
require.Equal(t, NotCounterReset, nextChunk.GetCounterResetHeader())
|
|
}
|
|
|
|
{
|
|
// Start a new chunk with a histogram that has an empty bucket.
|
|
// Add a histogram that has the same bucket missing.
|
|
// This should be appendable and can happen if we are merging from chunks
|
|
// where the first sample came from a recoded chunk that added the
|
|
// empty bucket.
|
|
h1 := eh.Copy()
|
|
// Add a bucket that is empty -10 offsets from the first bucket.
|
|
h1.PositiveSpans = make([]histogram.Span, len(eh.PositiveSpans)+1)
|
|
h1.PositiveSpans[0] = histogram.Span{Offset: eh.PositiveSpans[0].Offset - 10, Length: 1}
|
|
h1.PositiveSpans[1] = histogram.Span{Offset: eh.PositiveSpans[0].Offset + 9, Length: eh.PositiveSpans[0].Length}
|
|
for i, v := range eh.PositiveSpans[1:] {
|
|
h1.PositiveSpans[i+2] = v
|
|
}
|
|
h1.PositiveBuckets = make([]int64, len(eh.PositiveBuckets)+1)
|
|
h1.PositiveBuckets[0] = 0
|
|
for i, v := range eh.PositiveBuckets {
|
|
h1.PositiveBuckets[i+1] = v
|
|
}
|
|
|
|
c, hApp, ts, _ := setup(h1)
|
|
h2 := eh.Copy()
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.Empty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.NotEmpty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.True(t, ok)
|
|
require.False(t, cr)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
}
|
|
|
|
{ // Custom buckets, no change.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
_, _, _, _, ok, _ := hApp.appendable(h2)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
}
|
|
|
|
{ // Custom buckets, increase in bucket counts but no change in layout.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.Count++
|
|
h2.PositiveBuckets = []int64{6, -3, 0, -1, 2, 1, -3}
|
|
_, _, _, _, ok, _ := hApp.appendable(h2)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
}
|
|
|
|
{ // Custom buckets, decrease in bucket counts but no change in layout.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.Count--
|
|
h2.PositiveBuckets = []int64{6, -3, 0, -1, 2, 1, -5}
|
|
_, _, _, _, ok, _ := hApp.appendable(h2)
|
|
require.False(t, ok)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{ // Custom buckets, change only in custom bounds.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.CustomValues = []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21}
|
|
_, _, _, _, ok, _ := hApp.appendable(h2)
|
|
require.False(t, ok)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, CounterReset)
|
|
}
|
|
|
|
{ // Custom buckets, with more buckets.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Count += 6
|
|
h2.Sum = 30
|
|
// Existing histogram should get values converted from the above to:
|
|
// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
|
|
// so the new histogram should have new counts >= these per-bucket counts, e.g.:
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // 7 5 1 3 1 0 2 5 5 0 1 (total 30)
|
|
|
|
posInterjections, negInterjections, backwardPositiveInserts, backwardNegativeInserts, ok, cr := hApp.appendable(h2)
|
|
require.NotEmpty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.Empty(t, backwardPositiveInserts)
|
|
require.Empty(t, backwardNegativeInserts)
|
|
require.True(t, ok) // Only new buckets came in.
|
|
require.False(t, cr)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, UnknownCounterReset)
|
|
}
|
|
}
|
|
|
|
func assertNewHistogramChunkOnAppend(t *testing.T, oldChunk Chunk, hApp *HistogramAppender, ts int64, h *histogram.Histogram, expectHeader CounterResetHeader) {
|
|
oldChunkBytes := oldChunk.Bytes()
|
|
newChunk, recoded, newAppender, err := hApp.AppendHistogram(nil, ts, h, false)
|
|
require.Equal(t, oldChunkBytes, oldChunk.Bytes()) // Sanity check that previous chunk is untouched.
|
|
require.NoError(t, err)
|
|
require.NotNil(t, newChunk)
|
|
require.False(t, recoded)
|
|
require.NotEqual(t, oldChunk, newChunk)
|
|
require.Equal(t, expectHeader, newChunk.(*HistogramChunk).GetCounterResetHeader())
|
|
require.NotNil(t, newAppender)
|
|
require.NotEqual(t, hApp, newAppender)
|
|
assertSampleCount(t, newChunk, 1, ValHistogram)
|
|
}
|
|
|
|
func assertNoNewHistogramChunkOnAppend(t *testing.T, currChunk Chunk, hApp *HistogramAppender, ts int64, h *histogram.Histogram, expectHeader CounterResetHeader) {
|
|
prevChunkBytes := currChunk.Bytes()
|
|
newChunk, recoded, newAppender, err := hApp.AppendHistogram(nil, ts, h, false)
|
|
require.Greater(t, len(currChunk.Bytes()), len(prevChunkBytes)) // Check that current chunk is bigger than previously.
|
|
require.NoError(t, err)
|
|
require.Nil(t, newChunk)
|
|
require.False(t, recoded)
|
|
require.Equal(t, expectHeader, currChunk.(*HistogramChunk).GetCounterResetHeader())
|
|
require.NotNil(t, newAppender)
|
|
require.Equal(t, hApp, newAppender)
|
|
assertSampleCount(t, currChunk, 2, ValHistogram)
|
|
}
|
|
|
|
func assertRecodedHistogramChunkOnAppend(t *testing.T, prevChunk Chunk, hApp *HistogramAppender, ts int64, h *histogram.Histogram, expectHeader CounterResetHeader) {
|
|
prevChunkBytes := prevChunk.Bytes()
|
|
newChunk, recoded, newAppender, err := hApp.AppendHistogram(nil, ts, h, false)
|
|
require.Equal(t, prevChunkBytes, prevChunk.Bytes()) // Sanity check that previous chunk is untouched. This may change in the future if we implement in-place recoding.
|
|
require.NoError(t, err)
|
|
require.NotNil(t, newChunk)
|
|
require.True(t, recoded)
|
|
require.NotEqual(t, prevChunk, newChunk)
|
|
require.Equal(t, expectHeader, newChunk.(*HistogramChunk).GetCounterResetHeader())
|
|
require.NotNil(t, newAppender)
|
|
require.NotEqual(t, hApp, newAppender)
|
|
assertSampleCount(t, newChunk, 2, ValHistogram)
|
|
}
|
|
|
|
func assertSampleCount(t *testing.T, c Chunk, exp int64, vtype ValueType) {
|
|
count := int64(0)
|
|
it := c.Iterator(nil)
|
|
require.NoError(t, it.Err())
|
|
for it.Next() == vtype {
|
|
count++
|
|
}
|
|
require.NoError(t, it.Err())
|
|
require.Equal(t, exp, count)
|
|
}
|
|
|
|
func TestHistogramChunkAppendableWithEmptySpan(t *testing.T) {
|
|
tests := map[string]struct {
|
|
h1 *histogram.Histogram
|
|
h2 *histogram.Histogram
|
|
}{
|
|
"empty span in old and new histogram": {
|
|
h1: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 1, -1, 1, 0, 0, 0},
|
|
},
|
|
h2: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 37,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -2, 0, -3},
|
|
},
|
|
},
|
|
"empty span in old histogram": {
|
|
h1: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 1, Length: 0}, // This span will disappear.
|
|
{Offset: 2, Length: 4},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 1, -1, 1, 0, 0, 0},
|
|
},
|
|
h2: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 37,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 3, Length: 4},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -2, 0, -3},
|
|
},
|
|
},
|
|
"empty span in new histogram": {
|
|
h1: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 1, -1, 1, 0, 0, 0},
|
|
},
|
|
h2: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 37,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 1, Length: 0}, // This span is new.
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -2, 0, -3},
|
|
},
|
|
},
|
|
"two empty spans mixing offsets": {
|
|
h1: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 1, Length: 0},
|
|
{Offset: 3, Length: 0},
|
|
{Offset: 4, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 1, -1, 1, 0, 0, 0},
|
|
},
|
|
h2: &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 37,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 3, Length: 0},
|
|
{Offset: 1, Length: 0},
|
|
{Offset: 4, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -2, 0, -3},
|
|
},
|
|
},
|
|
"empty span in old and new custom buckets histogram": {
|
|
h1: &histogram.Histogram{
|
|
Schema: histogram.CustomBucketsSchema,
|
|
Count: 7,
|
|
Sum: 1234.5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
CustomValues: []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
|
|
},
|
|
h2: &histogram.Histogram{
|
|
Schema: histogram.CustomBucketsSchema,
|
|
Count: 10,
|
|
Sum: 2345.6,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
CustomValues: []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
|
|
},
|
|
},
|
|
}
|
|
|
|
for name, tc := range tests {
|
|
t.Run(name, func(t *testing.T) {
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
require.NoError(t, err)
|
|
require.Equal(t, 0, c.NumSamples())
|
|
|
|
_, _, _, err = app.AppendHistogram(nil, 1, tc.h1, true)
|
|
require.NoError(t, err)
|
|
require.Equal(t, 1, c.NumSamples())
|
|
hApp, _ := app.(*HistogramAppender)
|
|
|
|
pI, nI, bpI, bnI, okToAppend, counterReset := hApp.appendable(tc.h2)
|
|
require.Empty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, bpI)
|
|
require.Empty(t, bnI)
|
|
require.True(t, okToAppend)
|
|
require.False(t, counterReset)
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestAtFloatHistogram(t *testing.T) {
|
|
input := []histogram.Histogram{
|
|
{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 1, -1, 0, 0, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 1, -1, 1, 0, 0, 0},
|
|
},
|
|
{
|
|
Schema: 0,
|
|
Count: 36,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 1, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -2, 0, -3},
|
|
},
|
|
{
|
|
Schema: 0,
|
|
Count: 36,
|
|
Sum: 1111.1,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -2, 2, -1, 0, 0},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []int64{1, 3, -2, 5, -1, 0, -3},
|
|
},
|
|
}
|
|
|
|
expOutput := []*histogram.FloatHistogram{
|
|
{
|
|
Schema: 0,
|
|
Count: 21,
|
|
Sum: 1234.5,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 4,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []float64{1, 2, 1, 1, 1, 1, 1},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []float64{1, 2, 1, 2, 2, 2, 2},
|
|
},
|
|
{
|
|
CounterResetHint: histogram.NotCounterReset,
|
|
Schema: 0,
|
|
Count: 36,
|
|
Sum: 2345.6,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []float64{1, 3, 1, 2, 1, 1, 1},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []float64{1, 4, 2, 7, 5, 5, 2},
|
|
},
|
|
{
|
|
CounterResetHint: histogram.NotCounterReset,
|
|
Schema: 0,
|
|
Count: 36,
|
|
Sum: 1111.1,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 4},
|
|
{Offset: 0, Length: 0},
|
|
{Offset: 0, Length: 3},
|
|
},
|
|
PositiveBuckets: []float64{1, 3, 1, 3, 2, 2, 2},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 2, Length: 0},
|
|
{Offset: 2, Length: 3},
|
|
},
|
|
NegativeBuckets: []float64{1, 4, 2, 7, 6, 6, 3},
|
|
},
|
|
}
|
|
|
|
chk := NewHistogramChunk()
|
|
app, err := chk.Appender()
|
|
require.NoError(t, err)
|
|
for i := range input {
|
|
newc, _, _, err := app.AppendHistogram(nil, int64(i), &input[i], false)
|
|
require.NoError(t, err)
|
|
require.Nil(t, newc)
|
|
}
|
|
it := chk.Iterator(nil)
|
|
i := int64(0)
|
|
for it.Next() != ValNone {
|
|
ts, h := it.AtFloatHistogram(nil)
|
|
require.Equal(t, i, ts)
|
|
require.Equal(t, expOutput[i], h, "histogram %d unequal", i)
|
|
i++
|
|
}
|
|
}
|
|
|
|
func TestHistogramChunkAppendableGauge(t *testing.T) {
|
|
eh := &histogram.Histogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 5,
|
|
ZeroCount: 2,
|
|
Sum: 18.4,
|
|
ZeroThreshold: 1e-125,
|
|
Schema: 1,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 2, Length: 1},
|
|
{Offset: 3, Length: 2},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
},
|
|
PositiveBuckets: []int64{6, -3, 0, -1, 2, 1, -4}, // {6, 3, 3, 2, 4, 5, 1}
|
|
}
|
|
|
|
cbh := &histogram.Histogram{
|
|
CounterResetHint: histogram.GaugeType,
|
|
Count: 24,
|
|
Sum: 18.4,
|
|
Schema: histogram.CustomBucketsSchema,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 2, Length: 1},
|
|
{Offset: 3, Length: 2},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
},
|
|
PositiveBuckets: []int64{6, -3, 0, -1, 2, 1, -4}, // {6, 3, 3, 2, 4, 5, 1}
|
|
CustomValues: []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20},
|
|
}
|
|
|
|
setup := func(h *histogram.Histogram) (Chunk, *HistogramAppender, int64, *histogram.Histogram) {
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
require.NoError(t, err)
|
|
require.Equal(t, 0, c.NumSamples())
|
|
|
|
ts := int64(1234567890)
|
|
|
|
chk, _, app, err := app.AppendHistogram(nil, ts, h.Copy(), false)
|
|
require.NoError(t, err)
|
|
require.Nil(t, chk)
|
|
require.Equal(t, 1, c.NumSamples())
|
|
require.Equal(t, GaugeType, c.(*HistogramChunk).GetCounterResetHeader())
|
|
|
|
return c, app.(*HistogramAppender), ts, h
|
|
}
|
|
|
|
{ // Schema change.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.Schema++
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.False(t, ok)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Zero threshold change.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.ZeroThreshold += 0.1
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.False(t, ok)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // New histogram that has more buckets.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Count += 9
|
|
h2.ZeroCount++
|
|
h2.Sum = 30
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // {7, 5, 1, 3, 1, 0, 2, 5, 5, 0, 1}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.NotEmpty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // New histogram that has buckets missing.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 2, Length: 1},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 4, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
}
|
|
h2.Count -= 4
|
|
h2.Sum--
|
|
h2.PositiveBuckets = []int64{6, -3, 0, -1, 3, -4} // {6, 3, 3, 2, 5, 1}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.Empty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.NotEmpty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // New histogram that has a bucket missing and new buckets.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 2},
|
|
{Offset: 5, Length: 2},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
}
|
|
h2.Sum = 21
|
|
h2.PositiveBuckets = []int64{6, -3, -1, 2, 1, -4} // {6, 3, 2, 4, 5, 1}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.NotEmpty(t, pI)
|
|
require.NotEmpty(t, pBackwardI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // New histogram that has a counter reset while buckets are same.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.Sum = 23
|
|
h2.PositiveBuckets = []int64{6, -4, 1, -1, 2, 1, -4} // {6, 2, 3, 2, 4, 5, 1}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.Empty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // New histogram that has a counter reset while new buckets were added.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Sum = 29
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 0} // {7, 5, 1, 3, 1, 0, 2, 5, 5, 0, 0}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.NotEmpty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{
|
|
// New histogram that has a counter reset while new buckets were
|
|
// added before the first bucket and reset on first bucket.
|
|
c, hApp, ts, h1 := setup(eh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: -3, Length: 2},
|
|
{Offset: 1, Length: 2},
|
|
{Offset: 2, Length: 1},
|
|
{Offset: 3, Length: 2},
|
|
{Offset: 3, Length: 1},
|
|
{Offset: 1, Length: 1},
|
|
}
|
|
h2.Sum = 26
|
|
h2.PositiveBuckets = []int64{1, 1, 3, -2, 0, -1, 2, 1, -4} // {1, 2, 5, 3, 3, 2, 4, 5, 1}
|
|
|
|
pI, nI, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.NotEmpty(t, pI)
|
|
require.Empty(t, nI)
|
|
require.Empty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok)
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Custom buckets, no change.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Custom buckets, increase in bucket counts but no change in layout.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.Count++
|
|
h2.PositiveBuckets = []int64{6, -3, 0, -1, 2, 1, -3}
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Custom buckets, decrease in bucket counts but no change in layout.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.Count--
|
|
h2.PositiveBuckets = []int64{6, -3, 0, -1, 2, 1, -5}
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.True(t, ok)
|
|
|
|
assertNoNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Custom buckets, change only in custom bounds.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.CustomValues = []float64{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21}
|
|
_, _, _, _, _, _, ok := hApp.appendableGauge(h2)
|
|
require.False(t, ok)
|
|
|
|
assertNewHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
|
|
{ // Custom buckets, with more buckets.
|
|
c, hApp, ts, h1 := setup(cbh)
|
|
h2 := h1.Copy()
|
|
h2.PositiveSpans = []histogram.Span{
|
|
{Offset: 0, Length: 3},
|
|
{Offset: 1, Length: 1},
|
|
{Offset: 1, Length: 4},
|
|
{Offset: 3, Length: 3},
|
|
}
|
|
h2.Count += 6
|
|
h2.Sum = 30
|
|
// Existing histogram should get values converted from the above to:
|
|
// 6 3 0 3 0 0 2 4 5 0 1 (previous values with some new empty buckets in between)
|
|
// so the new histogram should have new counts >= these per-bucket counts, e.g.:
|
|
h2.PositiveBuckets = []int64{7, -2, -4, 2, -2, -1, 2, 3, 0, -5, 1} // 7 5 1 3 1 0 2 5 5 0 1 (total 30)
|
|
|
|
posInterjections, negInterjections, pBackwardI, nBackwardI, _, _, ok := hApp.appendableGauge(h2)
|
|
require.NotEmpty(t, posInterjections)
|
|
require.Empty(t, negInterjections)
|
|
require.Empty(t, pBackwardI)
|
|
require.Empty(t, nBackwardI)
|
|
require.True(t, ok) // Only new buckets came in.
|
|
|
|
assertRecodedHistogramChunkOnAppend(t, c, hApp, ts+1, h2, GaugeType)
|
|
}
|
|
}
|
|
|
|
func TestHistogramAppendOnlyErrors(t *testing.T) {
|
|
t.Run("schema change error", func(t *testing.T) {
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
require.NoError(t, err)
|
|
|
|
h := tsdbutil.GenerateTestHistogram(0)
|
|
var isRecoded bool
|
|
c, isRecoded, app, err = app.AppendHistogram(nil, 1, h, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.NoError(t, err)
|
|
|
|
// Add erroring histogram.
|
|
h2 := h.Copy()
|
|
h2.Schema++
|
|
c, isRecoded, _, err = app.AppendHistogram(nil, 2, h2, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.EqualError(t, err, "histogram schema change")
|
|
})
|
|
t.Run("counter reset error", func(t *testing.T) {
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
require.NoError(t, err)
|
|
|
|
h := tsdbutil.GenerateTestHistogram(0)
|
|
var isRecoded bool
|
|
c, isRecoded, app, err = app.AppendHistogram(nil, 1, h, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.NoError(t, err)
|
|
|
|
// Add erroring histogram.
|
|
h2 := h.Copy()
|
|
h2.CounterResetHint = histogram.CounterReset
|
|
c, isRecoded, _, err = app.AppendHistogram(nil, 2, h2, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.EqualError(t, err, "histogram counter reset")
|
|
})
|
|
t.Run("counter reset error with custom buckets", func(t *testing.T) {
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
require.NoError(t, err)
|
|
|
|
h := tsdbutil.GenerateTestCustomBucketsHistogram(0)
|
|
var isRecoded bool
|
|
c, isRecoded, app, err = app.AppendHistogram(nil, 1, h, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.NoError(t, err)
|
|
|
|
// Add erroring histogram.
|
|
h2 := h.Copy()
|
|
h2.CustomValues = []float64{0, 1, 2, 3, 4, 5, 6, 7}
|
|
c, isRecoded, _, err = app.AppendHistogram(nil, 2, h2, true)
|
|
require.Nil(t, c)
|
|
require.False(t, isRecoded)
|
|
require.EqualError(t, err, "histogram counter reset")
|
|
})
|
|
}
|
|
|
|
func BenchmarkAppendable(b *testing.B) {
|
|
// Create a histogram with a bunch of spans and buckets.
|
|
const (
|
|
numSpans = 1000
|
|
spanLength = 10
|
|
)
|
|
h := &histogram.Histogram{
|
|
Schema: 0,
|
|
Count: 100,
|
|
Sum: 1000,
|
|
ZeroThreshold: 0.001,
|
|
ZeroCount: 5,
|
|
}
|
|
for i := 0; i < numSpans; i++ {
|
|
h.PositiveSpans = append(h.PositiveSpans, histogram.Span{Offset: 5, Length: spanLength})
|
|
h.NegativeSpans = append(h.NegativeSpans, histogram.Span{Offset: 5, Length: spanLength})
|
|
for j := 0; j < spanLength; j++ {
|
|
h.PositiveBuckets = append(h.PositiveBuckets, int64(j))
|
|
h.NegativeBuckets = append(h.NegativeBuckets, int64(j))
|
|
}
|
|
}
|
|
|
|
c := Chunk(NewHistogramChunk())
|
|
|
|
// Create fresh appender and add the first histogram.
|
|
app, err := c.Appender()
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
_, _, _, err = app.AppendHistogram(nil, 1, h, true)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
hApp := app.(*HistogramAppender)
|
|
|
|
isAppendable := true
|
|
for i := 0; i < b.N; i++ {
|
|
_, _, _, _, ok, _ := hApp.appendable(h)
|
|
isAppendable = isAppendable && ok
|
|
}
|
|
if !isAppendable {
|
|
b.Fail()
|
|
}
|
|
}
|