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scan_internal_test.go
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scan_internal_test.go
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// Copyright 2023 The LevelDB-Go and Pebble Authors. All rights reserved. Use
// of this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
package pebble
import (
"context"
"fmt"
"math"
"strconv"
"strings"
"testing"
"time"
"github.com/cockroachdb/datadriven"
"github.com/cockroachdb/errors"
"github.com/cockroachdb/pebble/bloom"
"github.com/cockroachdb/pebble/internal/base"
"github.com/cockroachdb/pebble/internal/itertest"
"github.com/cockroachdb/pebble/internal/keyspan"
"github.com/cockroachdb/pebble/internal/rangekey"
"github.com/cockroachdb/pebble/internal/testkeys"
"github.com/cockroachdb/pebble/objstorage/objstorageprovider"
"github.com/cockroachdb/pebble/objstorage/remote"
"github.com/cockroachdb/pebble/sstable"
"github.com/cockroachdb/pebble/vfs"
"github.com/stretchr/testify/require"
)
func TestScanStatistics(t *testing.T) {
var d *DB
type scanInternalReader interface {
ScanStatistics(
ctx context.Context,
lower, upper []byte,
opts ScanStatisticsOptions,
) (LSMKeyStatistics, error)
}
batches := map[string]*Batch{}
snaps := map[string]*Snapshot{}
ctx := context.TODO()
getOpts := func() *Options {
opts := &Options{
FS: vfs.NewMem(),
Logger: testLogger{t: t},
Comparer: testkeys.Comparer,
FormatMajorVersion: FormatMinForSharedObjects,
BlockPropertyCollectors: []func() BlockPropertyCollector{
sstable.NewTestKeysBlockPropertyCollector,
},
}
opts.Experimental.RemoteStorage = remote.MakeSimpleFactory(map[remote.Locator]remote.Storage{
"": remote.NewInMem(),
})
opts.Experimental.CreateOnShared = remote.CreateOnSharedAll
opts.Experimental.CreateOnSharedLocator = ""
opts.DisableAutomaticCompactions = true
opts.EnsureDefaults()
opts.WithFSDefaults()
return opts
}
cleanup := func() (err error) {
for key, batch := range batches {
err = firstError(err, batch.Close())
delete(batches, key)
}
for key, snap := range snaps {
err = firstError(err, snap.Close())
delete(snaps, key)
}
if d != nil {
err = firstError(err, d.Close())
d = nil
}
return err
}
defer cleanup()
datadriven.RunTest(t, "testdata/scan_statistics", func(t *testing.T, td *datadriven.TestData) string {
switch td.Cmd {
case "reset":
if err := cleanup(); err != nil {
t.Fatal(err)
return err.Error()
}
var err error
d, err = Open("", getOpts())
require.NoError(t, err)
require.NoError(t, d.SetCreatorID(1))
return ""
case "snapshot":
s := d.NewSnapshot()
var name string
td.ScanArgs(t, "name", &name)
snaps[name] = s
return ""
case "batch":
var name string
td.MaybeScanArgs(t, "name", &name)
commit := td.HasArg("commit")
b := d.NewIndexedBatch()
require.NoError(t, runBatchDefineCmd(td, b))
var err error
if commit {
func() {
defer func() {
if r := recover(); r != nil {
err = errors.New(r.(string))
}
}()
err = b.Commit(nil)
}()
} else if name != "" {
batches[name] = b
}
if err != nil {
return err.Error()
}
count := b.Count()
if commit {
return fmt.Sprintf("committed %d keys\n", count)
}
return fmt.Sprintf("wrote %d keys to batch %q\n", count, name)
case "compact":
if err := runCompactCmd(td, d); err != nil {
return err.Error()
}
return runLSMCmd(td, d)
case "flush":
err := d.Flush()
if err != nil {
return err.Error()
}
return ""
case "commit":
name := pluckStringCmdArg(td, "batch")
b := batches[name]
defer b.Close()
count := b.Count()
require.NoError(t, d.Apply(b, nil))
delete(batches, name)
return fmt.Sprintf("committed %d keys\n", count)
case "scan-statistics":
var lower, upper []byte
var reader scanInternalReader = d
var b strings.Builder
var showSnapshotPinned = false
var keyKindsToDisplay []InternalKeyKind
var showLevels []string
for _, arg := range td.CmdArgs {
switch arg.Key {
case "lower":
lower = []byte(arg.Vals[0])
case "upper":
upper = []byte(arg.Vals[0])
case "show-snapshot-pinned":
showSnapshotPinned = true
case "keys":
for _, key := range arg.Vals {
keyKindsToDisplay = append(keyKindsToDisplay, base.ParseKind(key))
}
case "levels":
showLevels = append(showLevels, arg.Vals...)
default:
}
}
stats, err := reader.ScanStatistics(ctx, lower, upper, ScanStatisticsOptions{})
if err != nil {
return err.Error()
}
for _, level := range showLevels {
lvl, err := strconv.Atoi(level)
if err != nil || lvl >= numLevels {
return fmt.Sprintf("invalid level %s", level)
}
fmt.Fprintf(&b, "Level %d:\n", lvl)
if showSnapshotPinned {
fmt.Fprintf(&b, " compaction pinned count: %d\n", stats.Levels[lvl].SnapshotPinnedKeys)
}
for _, kind := range keyKindsToDisplay {
fmt.Fprintf(&b, " %s key count: %d\n", kind.String(), stats.Levels[lvl].KindsCount[kind])
if stats.Levels[lvl].LatestKindsCount[kind] > 0 {
fmt.Fprintf(&b, " %s latest count: %d\n", kind.String(), stats.Levels[lvl].LatestKindsCount[kind])
}
}
}
fmt.Fprintf(&b, "Aggregate:\n")
if showSnapshotPinned {
fmt.Fprintf(&b, " snapshot pinned count: %d\n", stats.Accumulated.SnapshotPinnedKeys)
}
for _, kind := range keyKindsToDisplay {
fmt.Fprintf(&b, " %s key count: %d\n", kind.String(), stats.Accumulated.KindsCount[kind])
if stats.Accumulated.LatestKindsCount[kind] > 0 {
fmt.Fprintf(&b, " %s latest count: %d\n", kind.String(), stats.Accumulated.LatestKindsCount[kind])
}
}
return b.String()
default:
return fmt.Sprintf("unknown command %q", td.Cmd)
}
})
}
func TestScanInternal(t *testing.T) {
var d *DB
type scanInternalReader interface {
ScanInternal(
ctx context.Context,
categoryAndQoS sstable.CategoryAndQoS,
lower, upper []byte,
visitPointKey func(key *InternalKey, value LazyValue, iterInfo IteratorLevel) error,
visitRangeDel func(start, end []byte, seqNum uint64) error,
visitRangeKey func(start, end []byte, keys []keyspan.Key) error,
visitSharedFile func(sst *SharedSSTMeta) error,
) error
}
batches := map[string]*Batch{}
snaps := map[string]*Snapshot{}
efos := map[string]*EventuallyFileOnlySnapshot{}
parseOpts := func(td *datadriven.TestData) (*Options, error) {
opts := &Options{
FS: vfs.NewMem(),
Logger: testLogger{t: t},
Comparer: testkeys.Comparer,
FormatMajorVersion: FormatVirtualSSTables,
BlockPropertyCollectors: []func() BlockPropertyCollector{
sstable.NewTestKeysBlockPropertyCollector,
},
}
opts.Experimental.RemoteStorage = remote.MakeSimpleFactory(map[remote.Locator]remote.Storage{
"": remote.NewInMem(),
})
opts.Experimental.CreateOnShared = remote.CreateOnSharedAll
opts.Experimental.CreateOnSharedLocator = ""
opts.DisableAutomaticCompactions = true
opts.EnsureDefaults()
opts.WithFSDefaults()
for _, cmdArg := range td.CmdArgs {
switch cmdArg.Key {
case "format-major-version":
v, err := strconv.Atoi(cmdArg.Vals[0])
if err != nil {
return nil, err
}
// Override the DB version.
opts.FormatMajorVersion = FormatMajorVersion(v)
case "block-size":
v, err := strconv.Atoi(cmdArg.Vals[0])
if err != nil {
return nil, err
}
for i := range opts.Levels {
opts.Levels[i].BlockSize = v
}
case "index-block-size":
v, err := strconv.Atoi(cmdArg.Vals[0])
if err != nil {
return nil, err
}
for i := range opts.Levels {
opts.Levels[i].IndexBlockSize = v
}
case "target-file-size":
v, err := strconv.Atoi(cmdArg.Vals[0])
if err != nil {
return nil, err
}
for i := range opts.Levels {
opts.Levels[i].TargetFileSize = int64(v)
}
case "bloom-bits-per-key":
v, err := strconv.Atoi(cmdArg.Vals[0])
if err != nil {
return nil, err
}
fp := bloom.FilterPolicy(v)
opts.Filters = map[string]FilterPolicy{fp.Name(): fp}
for i := range opts.Levels {
opts.Levels[i].FilterPolicy = fp
}
case "merger":
switch cmdArg.Vals[0] {
case "appender":
opts.Merger = base.DefaultMerger
default:
return nil, errors.Newf("unrecognized Merger %q\n", cmdArg.Vals[0])
}
}
}
return opts, nil
}
cleanup := func() (err error) {
for key, batch := range batches {
err = firstError(err, batch.Close())
delete(batches, key)
}
for key, snap := range snaps {
err = firstError(err, snap.Close())
delete(snaps, key)
}
for key, es := range efos {
err = firstError(err, es.Close())
delete(efos, key)
}
if d != nil {
err = firstError(err, d.Close())
d = nil
}
return err
}
defer cleanup()
datadriven.RunTest(t, "testdata/scan_internal", func(t *testing.T, td *datadriven.TestData) string {
switch td.Cmd {
case "define":
if err := cleanup(); err != nil {
return err.Error()
}
opts, err := parseOpts(td)
if err != nil {
return err.Error()
}
d, err = runDBDefineCmd(td, opts)
if err != nil {
return err.Error()
}
return runLSMCmd(td, d)
case "reset":
if err := cleanup(); err != nil {
t.Fatal(err)
return err.Error()
}
opts, err := parseOpts(td)
if err != nil {
t.Fatal(err)
return err.Error()
}
d, err = Open("", opts)
require.NoError(t, err)
require.NoError(t, d.SetCreatorID(1))
return ""
case "snapshot":
s := d.NewSnapshot()
var name string
td.ScanArgs(t, "name", &name)
snaps[name] = s
return ""
case "wait-for-file-only-snapshot":
if len(td.CmdArgs) != 1 {
panic("insufficient args for file-only-snapshot command")
}
name := td.CmdArgs[0].Key
es := efos[name]
if err := es.WaitForFileOnlySnapshot(context.TODO(), 1*time.Millisecond); err != nil {
return err.Error()
}
return "ok"
case "file-only-snapshot":
if len(td.CmdArgs) != 1 {
panic("insufficient args for file-only-snapshot command")
}
name := td.CmdArgs[0].Key
var keyRanges []KeyRange
for _, line := range strings.Split(td.Input, "\n") {
fields := strings.Fields(line)
if len(fields) != 2 {
return "expected two fields for file-only snapshot KeyRanges"
}
kr := KeyRange{Start: []byte(fields[0]), End: []byte(fields[1])}
keyRanges = append(keyRanges, kr)
}
s := d.NewEventuallyFileOnlySnapshot(keyRanges)
efos[name] = s
return "ok"
case "batch":
var name string
td.MaybeScanArgs(t, "name", &name)
commit := td.HasArg("commit")
ingest := td.HasArg("ingest")
b := d.NewIndexedBatch()
require.NoError(t, runBatchDefineCmd(td, b))
var err error
if commit {
func() {
defer func() {
if r := recover(); r != nil {
err = errors.New(r.(string))
}
}()
err = b.Commit(nil)
}()
} else if ingest {
points, rangeDels, rangeKeys := batchSort(b)
file, err := d.opts.FS.Create("temp0.sst")
require.NoError(t, err)
w := sstable.NewWriter(objstorageprovider.NewFileWritable(file), d.opts.MakeWriterOptions(0, sstable.TableFormatPebblev4))
{
span, err := rangeDels.First()
for ; span != nil; span, err = rangeDels.Next() {
require.NoError(t, w.DeleteRange(span.Start, span.End))
}
require.NoError(t, err)
require.NoError(t, rangeDels.Close())
}
{
span, err := rangeKeys.First()
for ; span != nil; span, err = rangeKeys.Next() {
keys := []keyspan.Key{}
for i := range span.Keys {
keys = append(keys, span.Keys[i])
keys[i].Trailer = base.MakeTrailer(0, keys[i].Kind())
}
keyspan.SortKeysByTrailer(&keys)
newSpan := &keyspan.Span{Start: span.Start, End: span.End, Keys: keys}
require.NoError(t, rangekey.Encode(newSpan, w.AddRangeKey))
}
require.NoError(t, err)
}
require.NoError(t, rangeKeys.Close())
for key, val := points.First(); key != nil; key, val = points.Next() {
var value []byte
value, _, err = val.Value(value)
require.NoError(t, err)
require.NoError(t, w.Add(*key, value))
}
points.Close()
require.NoError(t, w.Close())
require.NoError(t, d.Ingest([]string{"temp0.sst"}))
} else if name != "" {
batches[name] = b
}
if err != nil {
return err.Error()
}
count := b.Count()
if commit {
return fmt.Sprintf("committed %d keys\n", count)
}
return fmt.Sprintf("wrote %d keys to batch %q\n", count, name)
case "compact":
if err := runCompactCmd(td, d); err != nil {
return err.Error()
}
return runLSMCmd(td, d)
case "flush":
err := d.Flush()
if err != nil {
return err.Error()
}
return ""
case "lsm":
return runLSMCmd(td, d)
case "commit":
name := pluckStringCmdArg(td, "batch")
b := batches[name]
defer b.Close()
count := b.Count()
require.NoError(t, d.Apply(b, nil))
delete(batches, name)
return fmt.Sprintf("committed %d keys\n", count)
case "scan-internal":
var lower, upper []byte
var reader scanInternalReader = d
var b strings.Builder
var fileVisitor func(sst *SharedSSTMeta) error
for _, arg := range td.CmdArgs {
switch arg.Key {
case "lower":
lower = []byte(arg.Vals[0])
case "upper":
upper = []byte(arg.Vals[0])
case "snapshot":
name := arg.Vals[0]
snap, ok := snaps[name]
if !ok {
return fmt.Sprintf("no snapshot found for name %s", name)
}
reader = snap
case "file-only-snapshot":
name := arg.Vals[0]
efos, ok := efos[name]
if !ok {
return fmt.Sprintf("no snapshot found for name %s", name)
}
reader = efos
case "skip-shared":
fileVisitor = func(sst *SharedSSTMeta) error {
fmt.Fprintf(&b, "shared file: %s [%s-%s] [point=%s-%s] [range=%s-%s]\n", sst.fileNum, sst.Smallest.String(), sst.Largest.String(), sst.SmallestPointKey.String(), sst.LargestPointKey.String(), sst.SmallestRangeKey.String(), sst.LargestRangeKey.String())
return nil
}
}
}
err := reader.ScanInternal(context.TODO(), sstable.CategoryAndQoS{}, lower, upper,
func(key *InternalKey, value LazyValue, _ IteratorLevel) error {
v := value.InPlaceValue()
fmt.Fprintf(&b, "%s (%s)\n", key, v)
return nil
},
func(start, end []byte, seqNum uint64) error {
fmt.Fprintf(&b, "%s-%s#%d,RANGEDEL\n", start, end, seqNum)
return nil
},
func(start, end []byte, keys []keyspan.Key) error {
s := keyspan.Span{Start: start, End: end, Keys: keys}
fmt.Fprintf(&b, "%s\n", s.String())
return nil
},
fileVisitor,
)
if err != nil {
return err.Error()
}
return b.String()
default:
return fmt.Sprintf("unknown command %q", td.Cmd)
}
})
}
func TestPointCollapsingIter(t *testing.T) {
var def string
datadriven.RunTest(t, "testdata/point_collapsing_iter", func(t *testing.T, d *datadriven.TestData) string {
switch d.Cmd {
case "define":
def = d.Input
return ""
case "iter":
f := &fakeIter{}
var spans []keyspan.Span
for _, line := range strings.Split(def, "\n") {
for _, key := range strings.Fields(line) {
j := strings.Index(key, ":")
k := base.ParseInternalKey(key[:j])
v := []byte(key[j+1:])
if k.Kind() == InternalKeyKindRangeDelete {
spans = append(spans, keyspan.Span{
Start: k.UserKey,
End: v,
Keys: []keyspan.Key{{Trailer: k.Trailer}},
KeysOrder: 0,
})
continue
}
f.keys = append(f.keys, k)
f.vals = append(f.vals, v)
}
}
ksIter := keyspan.NewIter(base.DefaultComparer.Compare, spans)
pcIter := &pointCollapsingIterator{
comparer: base.DefaultComparer,
merge: base.DefaultMerger.Merge,
seqNum: math.MaxUint64,
}
pcIter.iter.Init(base.DefaultComparer, f, ksIter, keyspan.InterleavingIterOpts{})
defer pcIter.Close()
return itertest.RunInternalIterCmd(t, d, pcIter, itertest.Verbose)
default:
return fmt.Sprintf("unknown command: %s", d.Cmd)
}
})
}