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compaction_test.go
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compaction_test.go
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// Copyright 2013 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 (
"bytes"
"fmt"
"math"
"regexp"
"sort"
"strconv"
"strings"
"testing"
"time"
"github.com/cockroachdb/pebble/internal/base"
"github.com/cockroachdb/pebble/internal/datadriven"
"github.com/cockroachdb/pebble/internal/manifest"
"github.com/cockroachdb/pebble/sstable"
"github.com/cockroachdb/pebble/vfs"
)
func TestPickCompaction(t *testing.T) {
fileNums := func(f []fileMetadata) string {
ss := make([]string, 0, len(f))
for _, meta := range f {
ss = append(ss, strconv.Itoa(int(meta.FileNum)))
}
sort.Strings(ss)
return strings.Join(ss, ",")
}
opts := (*Options)(nil).EnsureDefaults()
testCases := []struct {
desc string
version version
picker compactionPicker
want string
}{
{
desc: "no compaction",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("j.SET.102"),
},
},
},
},
want: "",
},
{
desc: "1 L0 file",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("j.SET.102"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100 ",
},
{
desc: "2 L0 files (0 overlaps)",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("j.SET.102"),
},
{
FileNum: 110,
Size: 1,
Smallest: base.ParseInternalKey("k.SET.111"),
Largest: base.ParseInternalKey("l.SET.112"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100 ",
},
{
desc: "2 L0 files, with ikey overlap",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("p.SET.102"),
},
{
FileNum: 110,
Size: 1,
Smallest: base.ParseInternalKey("j.SET.111"),
Largest: base.ParseInternalKey("q.SET.112"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100,110 ",
},
{
desc: "2 L0 files, with ukey overlap",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("i.SET.102"),
},
{
FileNum: 110,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.111"),
Largest: base.ParseInternalKey("i.SET.112"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100,110 ",
},
{
desc: "1 L0 file, 2 L1 files (0 overlaps)",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("i.SET.102"),
},
},
1: []fileMetadata{
{
FileNum: 200,
Size: 1,
Smallest: base.ParseInternalKey("a.SET.201"),
Largest: base.ParseInternalKey("b.SET.202"),
},
{
FileNum: 210,
Size: 1,
Smallest: base.ParseInternalKey("y.SET.211"),
Largest: base.ParseInternalKey("z.SET.212"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100 ",
},
{
desc: "1 L0 file, 2 L1 files (1 overlap), 4 L2 files (3 overlaps)",
version: version{
Files: [numLevels][]fileMetadata{
0: []fileMetadata{
{
FileNum: 100,
Size: 1,
Smallest: base.ParseInternalKey("i.SET.101"),
Largest: base.ParseInternalKey("t.SET.102"),
},
},
1: []fileMetadata{
{
FileNum: 200,
Size: 1,
Smallest: base.ParseInternalKey("a.SET.201"),
Largest: base.ParseInternalKey("e.SET.202"),
},
{
FileNum: 210,
Size: 1,
Smallest: base.ParseInternalKey("f.SET.211"),
Largest: base.ParseInternalKey("j.SET.212"),
},
},
2: []fileMetadata{
{
FileNum: 300,
Size: 1,
Smallest: base.ParseInternalKey("a.SET.301"),
Largest: base.ParseInternalKey("b.SET.302"),
},
{
FileNum: 310,
Size: 1,
Smallest: base.ParseInternalKey("c.SET.311"),
Largest: base.ParseInternalKey("g.SET.312"),
},
{
FileNum: 320,
Size: 1,
Smallest: base.ParseInternalKey("h.SET.321"),
Largest: base.ParseInternalKey("m.SET.322"),
},
{
FileNum: 330,
Size: 1,
Smallest: base.ParseInternalKey("n.SET.331"),
Largest: base.ParseInternalKey("z.SET.332"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 0,
baseLevel: 1,
},
want: "100 210 310,320,330",
},
{
desc: "4 L1 files, 2 L2 files, can grow",
version: version{
Files: [numLevels][]fileMetadata{
1: []fileMetadata{
{
FileNum: 200,
Size: 1,
Smallest: base.ParseInternalKey("i1.SET.201"),
Largest: base.ParseInternalKey("i2.SET.202"),
},
{
FileNum: 210,
Size: 1,
Smallest: base.ParseInternalKey("j1.SET.211"),
Largest: base.ParseInternalKey("j2.SET.212"),
},
{
FileNum: 220,
Size: 1,
Smallest: base.ParseInternalKey("k1.SET.221"),
Largest: base.ParseInternalKey("k2.SET.222"),
},
{
FileNum: 230,
Size: 1,
Smallest: base.ParseInternalKey("l1.SET.231"),
Largest: base.ParseInternalKey("l2.SET.232"),
},
},
2: []fileMetadata{
{
FileNum: 300,
Size: 1,
Smallest: base.ParseInternalKey("a0.SET.301"),
Largest: base.ParseInternalKey("l0.SET.302"),
},
{
FileNum: 310,
Size: 1,
Smallest: base.ParseInternalKey("l2.SET.311"),
Largest: base.ParseInternalKey("z2.SET.312"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 1,
baseLevel: 1,
},
want: "200,210,220 300 ",
},
{
desc: "4 L1 files, 2 L2 files, can't grow (range)",
version: version{
Files: [numLevels][]fileMetadata{
1: []fileMetadata{
{
FileNum: 200,
Size: 1,
Smallest: base.ParseInternalKey("i1.SET.201"),
Largest: base.ParseInternalKey("i2.SET.202"),
},
{
FileNum: 210,
Size: 1,
Smallest: base.ParseInternalKey("j1.SET.211"),
Largest: base.ParseInternalKey("j2.SET.212"),
},
{
FileNum: 220,
Size: 1,
Smallest: base.ParseInternalKey("k1.SET.221"),
Largest: base.ParseInternalKey("k2.SET.222"),
},
{
FileNum: 230,
Size: 1,
Smallest: base.ParseInternalKey("l1.SET.231"),
Largest: base.ParseInternalKey("l2.SET.232"),
},
},
2: []fileMetadata{
{
FileNum: 300,
Size: 1,
Smallest: base.ParseInternalKey("a0.SET.301"),
Largest: base.ParseInternalKey("j0.SET.302"),
},
{
FileNum: 310,
Size: 1,
Smallest: base.ParseInternalKey("j2.SET.311"),
Largest: base.ParseInternalKey("z2.SET.312"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 1,
baseLevel: 1,
},
want: "200 300 ",
},
{
desc: "4 L1 files, 2 L2 files, can't grow (size)",
version: version{
Files: [numLevels][]fileMetadata{
1: []fileMetadata{
{
FileNum: 200,
Size: expandedCompactionByteSizeLimit(opts, 1) - 1,
Smallest: base.ParseInternalKey("i1.SET.201"),
Largest: base.ParseInternalKey("i2.SET.202"),
},
{
FileNum: 210,
Size: expandedCompactionByteSizeLimit(opts, 1) - 1,
Smallest: base.ParseInternalKey("j1.SET.211"),
Largest: base.ParseInternalKey("j2.SET.212"),
},
{
FileNum: 220,
Size: expandedCompactionByteSizeLimit(opts, 1) - 1,
Smallest: base.ParseInternalKey("k1.SET.221"),
Largest: base.ParseInternalKey("k2.SET.222"),
},
{
FileNum: 230,
Size: expandedCompactionByteSizeLimit(opts, 1) - 1,
Smallest: base.ParseInternalKey("l1.SET.231"),
Largest: base.ParseInternalKey("l2.SET.232"),
},
},
2: []fileMetadata{
{
FileNum: 300,
Size: expandedCompactionByteSizeLimit(opts, 2) - 1,
Smallest: base.ParseInternalKey("a0.SET.301"),
Largest: base.ParseInternalKey("l0.SET.302"),
},
{
FileNum: 310,
Size: expandedCompactionByteSizeLimit(opts, 2) - 1,
Smallest: base.ParseInternalKey("l2.SET.311"),
Largest: base.ParseInternalKey("z2.SET.312"),
},
},
},
},
picker: compactionPicker{
score: 99,
level: 1,
baseLevel: 1,
},
want: "200 300 ",
},
}
for _, tc := range testCases {
vs := &versionSet{
opts: opts,
cmp: DefaultComparer.Compare,
cmpName: DefaultComparer.Name,
}
vs.versions.Init(nil)
vs.append(&tc.version)
vs.picker = &tc.picker
vs.picker.vers = &tc.version
c, got := vs.picker.pickAuto(opts, new(uint64)), ""
if c != nil {
got0 := fileNums(c.inputs[0])
got1 := fileNums(c.inputs[1])
got2 := fileNums(c.grandparents)
got = got0 + " " + got1 + " " + got2
}
if got != tc.want {
t.Fatalf("%s:\ngot %q\nwant %q", tc.desc, got, tc.want)
}
}
}
func TestElideTombstone(t *testing.T) {
testCases := []struct {
desc string
level int
version version
wants map[string]bool
}{
{
desc: "empty",
level: 1,
version: version{},
wants: map[string]bool{
"x": true,
},
},
{
desc: "non-empty",
level: 1,
version: version{
Files: [numLevels][]fileMetadata{
1: []fileMetadata{
{
Smallest: base.ParseInternalKey("c.SET.801"),
Largest: base.ParseInternalKey("g.SET.800"),
},
{
Smallest: base.ParseInternalKey("x.SET.701"),
Largest: base.ParseInternalKey("y.SET.700"),
},
},
2: []fileMetadata{
{
Smallest: base.ParseInternalKey("d.SET.601"),
Largest: base.ParseInternalKey("h.SET.600"),
},
{
Smallest: base.ParseInternalKey("r.SET.501"),
Largest: base.ParseInternalKey("t.SET.500"),
},
},
3: []fileMetadata{
{
Smallest: base.ParseInternalKey("f.SET.401"),
Largest: base.ParseInternalKey("g.SET.400"),
},
{
Smallest: base.ParseInternalKey("w.SET.301"),
Largest: base.ParseInternalKey("x.SET.300"),
},
},
4: []fileMetadata{
{
Smallest: base.ParseInternalKey("f.SET.201"),
Largest: base.ParseInternalKey("m.SET.200"),
},
{
Smallest: base.ParseInternalKey("t.SET.101"),
Largest: base.ParseInternalKey("t.SET.100"),
},
},
},
},
wants: map[string]bool{
"b": true,
"c": true,
"d": true,
"e": true,
"f": false,
"g": false,
"h": false,
"l": false,
"m": false,
"n": true,
"q": true,
"r": true,
"s": true,
"t": false,
"u": true,
"v": true,
"w": false,
"x": false,
"y": true,
"z": true,
},
},
{
desc: "repeated ukey",
level: 1,
version: version{
Files: [numLevels][]fileMetadata{
6: []fileMetadata{
{
Smallest: base.ParseInternalKey("i.SET.401"),
Largest: base.ParseInternalKey("i.SET.400"),
},
{
Smallest: base.ParseInternalKey("i.SET.301"),
Largest: base.ParseInternalKey("k.SET.300"),
},
{
Smallest: base.ParseInternalKey("k.SET.201"),
Largest: base.ParseInternalKey("m.SET.200"),
},
{
Smallest: base.ParseInternalKey("m.SET.101"),
Largest: base.ParseInternalKey("m.SET.100"),
},
},
},
},
wants: map[string]bool{
"h": true,
"i": false,
"j": false,
"k": false,
"l": false,
"m": false,
"n": true,
},
},
}
for _, tc := range testCases {
c := compaction{
cmp: DefaultComparer.Compare,
version: &tc.version,
startLevel: tc.level,
outputLevel: tc.level + 1,
}
for ukey, want := range tc.wants {
if got := c.elideTombstone([]byte(ukey)); got != want {
t.Errorf("%s: ukey=%q: got %v, want %v", tc.desc, ukey, got, want)
}
}
}
}
func TestCompaction(t *testing.T) {
const memTableSize = 10000
// Tuned so that 2 values can reside in the memtable before a flush, but a
// 3rd value will cause a flush. Needs to account for the max skiplist node
// size.
const valueSize = 3500
mem := vfs.NewMem()
d, err := Open("", &Options{
FS: mem,
MemTableSize: memTableSize,
})
if err != nil {
t.Fatalf("Open: %v", err)
}
mockLimiter := mockCountLimiter{burst: int(math.MaxInt32)}
d.compactionLimiter = &mockLimiter
get1 := func(iter internalIterator) (ret string) {
b := &bytes.Buffer{}
for key, _ := iter.First(); key != nil; key, _ = iter.Next() {
b.Write(key.UserKey)
}
if err := iter.Close(); err != nil {
t.Fatalf("iterator Close: %v", err)
}
return b.String()
}
getAll := func() (gotMem, gotDisk string, err error) {
d.mu.Lock()
defer d.mu.Unlock()
if d.mu.mem.mutable != nil {
gotMem = get1(d.mu.mem.mutable.newIter(nil))
}
ss := []string(nil)
v := d.mu.versions.currentVersion()
for _, files := range v.Files {
for _, meta := range files {
f, err := mem.Open(base.MakeFilename("", fileTypeTable, meta.FileNum))
if err != nil {
return "", "", fmt.Errorf("Open: %v", err)
}
defer f.Close()
r, err := sstable.NewReader(f, 0, meta.FileNum, nil)
if err != nil {
return "", "", fmt.Errorf("NewReader: %v", err)
}
defer r.Close()
ss = append(ss, get1(r.NewIter(nil /* lower */, nil /* upper */))+".")
}
}
sort.Strings(ss)
return gotMem, strings.Join(ss, ""), nil
}
value := bytes.Repeat([]byte("x"), valueSize)
testCases := []struct {
key, wantMem, wantDisk string
}{
{"+A", "A", ""},
{"+a", "Aa", ""},
{"+B", "B", "Aa."},
{"+b", "Bb", "Aa."},
// The next level-0 table overwrites the B key.
{"+C", "C", "Aa.Bb."},
{"+B", "BC", "Aa.Bb."},
// The next level-0 table deletes the a key.
{"+D", "D", "Aa.BC.Bb."},
{"-a", "Da", "Aa.BC.Bb."},
{"+d", "Dad", "Aa.BC.Bb."},
// The next addition creates the fourth level-0 table, and l0CompactionTrigger == 4,
// so this triggers a non-trivial compaction into one level-1 table. Note that the
// keys in this one larger table are interleaved from the four smaller ones.
{"+E", "E", "ABCDbd."},
{"+e", "Ee", "ABCDbd."},
{"+F", "F", "ABCDbd.Ee."},
}
for _, tc := range testCases {
if key := tc.key[1:]; tc.key[0] == '+' {
if err := d.Set([]byte(key), value, nil); err != nil {
t.Errorf("%q: Set: %v", key, err)
break
}
} else {
if err := d.Delete([]byte(key), nil); err != nil {
t.Errorf("%q: Delete: %v", key, err)
break
}
}
// try backs off to allow any writes to the memfs to complete.
err := try(100*time.Microsecond, 20*time.Second, func() error {
gotMem, gotDisk, err := getAll()
if err != nil {
return err
}
if testing.Verbose() {
fmt.Printf("mem=%s (%s) disk=%s (%s)\n", gotMem, tc.wantMem, gotDisk, tc.wantDisk)
}
if gotMem != tc.wantMem {
return fmt.Errorf("mem: got %q, want %q", gotMem, tc.wantMem)
}
if gotDisk != tc.wantDisk {
return fmt.Errorf("ldb: got %q, want %q", gotDisk, tc.wantDisk)
}
return nil
})
if err != nil {
t.Errorf("%q: %v", tc.key, err)
}
}
if err := d.Close(); err != nil {
t.Fatalf("db Close: %v", err)
}
if !(mockLimiter.allowCount > 0) {
t.Errorf("limiter allow: got %d, want >%d", mockLimiter.allowCount, 0)
}
if mockLimiter.waitCount != 0 {
t.Errorf("limiter wait: got %d, want %d", mockLimiter.waitCount, 0)
}
}
func TestManualCompaction(t *testing.T) {
mem := vfs.NewMem()
err := mem.MkdirAll("ext", 0755)
if err != nil {
t.Fatal(err)
}
d, err := Open("", &Options{
FS: mem,
})
if err != nil {
t.Fatal(err)
}
datadriven.RunTest(t, "testdata/manual_compaction", func(td *datadriven.TestData) string {
switch td.Cmd {
case "batch":
b := d.NewIndexedBatch()
if err := runBatchDefineCmd(td, b); err != nil {
return err.Error()
}
b.Commit(nil)
return ""
case "define":
var err error
if d, err = runDBDefineCmd(td, nil /* options */); err != nil {
return err.Error()
}
d.mu.Lock()
s := d.mu.versions.currentVersion().String()
d.mu.Unlock()
return s
case "iter":
iter := d.NewIter(nil)
defer iter.Close()
var b bytes.Buffer
for _, line := range strings.Split(td.Input, "\n") {
parts := strings.Fields(line)
if len(parts) == 0 {
continue
}
switch parts[0] {
case "seek-ge":
if len(parts) != 2 {
return fmt.Sprintf("seek-ge <key>\n")
}
iter.SeekGE([]byte(strings.TrimSpace(parts[1])))
case "seek-lt":
if len(parts) != 2 {
return fmt.Sprintf("seek-lt <key>\n")
}
iter.SeekLT([]byte(strings.TrimSpace(parts[1])))
case "next":
iter.Next()
case "prev":
iter.Prev()
default:
return fmt.Sprintf("unknown op: %s", parts[0])
}
if iter.Valid() {
fmt.Fprintf(&b, "%s:%s\n", iter.Key(), iter.Value())
} else if err := iter.Error(); err != nil {
fmt.Fprintf(&b, "err=%v\n", err)
} else {
fmt.Fprintf(&b, ".\n")
}
}
return b.String()
case "compact":
if err := runCompactCommand(td, d); err != nil {
return err.Error()
}
d.mu.Lock()
s := d.mu.versions.currentVersion().String()
d.mu.Unlock()
return s
default:
return fmt.Sprintf("unknown command: %s", td.Cmd)
}
})
}
func TestCompactionShouldStopBefore(t *testing.T) {
cmp := DefaultComparer.Compare
var grandparents []fileMetadata
parseMeta := func(s string) fileMetadata {
parts := strings.Split(s, "-")
if len(parts) != 2 {
t.Fatalf("malformed table spec: %s", s)
}
return fileMetadata{
Smallest: InternalKey{UserKey: []byte(parts[0])},
Largest: InternalKey{UserKey: []byte(parts[1])},
}
}
datadriven.RunTest(t, "testdata/compaction_should_stop_before",
func(d *datadriven.TestData) string {
switch d.Cmd {
case "define":
grandparents = nil
if len(d.Input) == 0 {
return ""
}
for _, data := range strings.Split(d.Input, "\n") {
parts := strings.Fields(data)
if len(parts) != 2 {
return fmt.Sprintf("malformed test:\n%s", d.Input)
}
meta := parseMeta(parts[0])
var err error
meta.Size, err = strconv.ParseUint(parts[1], 10, 64)
if err != nil {
return err.Error()
}
grandparents = append(grandparents, meta)
}
manifest.SortBySmallest(grandparents, cmp)
return ""
case "compact":
c := &compaction{
cmp: cmp,
grandparents: grandparents,
}
if len(d.CmdArgs) != 1 {
return fmt.Sprintf("%s expects 1 argument", d.Cmd)
}
if len(d.CmdArgs[0].Vals) != 1 {
return fmt.Sprintf("%s expects 1 value", d.CmdArgs[0].Key)
}
var err error
c.maxOverlapBytes, err = strconv.ParseUint(d.CmdArgs[0].Vals[0], 10, 64)
if err != nil {
return err.Error()
}
var buf bytes.Buffer
var smallest, largest string
for i, key := range strings.Fields(d.Input) {
if i == 0 {
smallest = key
}
if c.shouldStopBefore(base.MakeInternalKey([]byte(key), 0, 0)) {
fmt.Fprintf(&buf, "%s-%s\n", smallest, largest)
smallest = key
}
largest = key
}
fmt.Fprintf(&buf, "%s-%s\n", smallest, largest)
return buf.String()
default:
return fmt.Sprintf("unknown command: %s", d.Cmd)
}
})
}
func TestCompactionOutputLevel(t *testing.T) {
opts := (*Options)(nil).EnsureDefaults()
version := &version{}
datadriven.RunTest(t, "testdata/compaction_output_level",
func(d *datadriven.TestData) (res string) {
defer func() {
if r := recover(); r != nil {
res = fmt.Sprintln(r)
}
}()
switch d.Cmd {
case "compact":
var start, base int
d.ScanArgs(t, "start", &start)
d.ScanArgs(t, "base", &base)
c := newCompaction(opts, version, start, base, new(uint64))
return fmt.Sprintf("output=%d\nmax-output-file-size=%d\n",
c.outputLevel, c.maxOutputFileSize)
default:
return fmt.Sprintf("unknown command: %s", d.Cmd)
}
})
}
func TestCompactionExpandInputs(t *testing.T) {
cmp := DefaultComparer.Compare
var files []fileMetadata
parseMeta := func(s string) fileMetadata {
parts := strings.Split(s, "-")
if len(parts) != 2 {
t.Fatalf("malformed table spec: %s", s)
}
return fileMetadata{
Smallest: base.ParseInternalKey(parts[0]),
Largest: base.ParseInternalKey(parts[1]),
}
}
datadriven.RunTest(t, "testdata/compaction_expand_inputs",
func(d *datadriven.TestData) string {
switch d.Cmd {
case "define":
files = nil
if len(d.Input) == 0 {
return ""
}
for _, data := range strings.Split(d.Input, "\n") {
meta := parseMeta(data)
meta.FileNum = uint64(len(files))
files = append(files, meta)
}
manifest.SortBySmallest(files, cmp)
return ""
case "expand-inputs":
c := &compaction{
cmp: cmp,
version: &version{},
startLevel: 1,
}
c.version.Files[c.startLevel] = files
if len(d.CmdArgs) != 1 {
return fmt.Sprintf("%s expects 1 argument", d.Cmd)
}
index, err := strconv.ParseInt(d.CmdArgs[0].String(), 10, 64)
if err != nil {
return err.Error()
}
inputs := c.expandInputs(files[index : index+1])
var buf bytes.Buffer
for i := range inputs {
f := &inputs[i]
fmt.Fprintf(&buf, "%d: %s-%s\n", f.FileNum, f.Smallest, f.Largest)
}
return buf.String()
default:
return fmt.Sprintf("unknown command: %s", d.Cmd)
}
})
}
func TestCompactionAtomicUnitBounds(t *testing.T) {
cmp := DefaultComparer.Compare
var files []fileMetadata
parseMeta := func(s string) fileMetadata {
parts := strings.Split(s, "-")
if len(parts) != 2 {
t.Fatalf("malformed table spec: %s", s)
}
return fileMetadata{
Smallest: base.ParseInternalKey(parts[0]),
Largest: base.ParseInternalKey(parts[1]),
}
}
datadriven.RunTest(t, "testdata/compaction_atomic_unit_bounds",
func(d *datadriven.TestData) string {
switch d.Cmd {
case "define":
files = nil
if len(d.Input) == 0 {
return ""
}
for _, data := range strings.Split(d.Input, "\n") {
meta := parseMeta(data)
meta.FileNum = uint64(len(files))
files = append(files, meta)
}
manifest.SortBySmallest(files, cmp)
return ""
case "atomic-unit-bounds":
c := &compaction{
cmp: cmp,