mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
// Command main generates test fixtures for a DB containing a mixture of point
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// and range keys.
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//
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// Upon running this command, the DB directory will contain:
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//
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// 1. A single SSTable (000005.sst), containing:
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// a. 26 point keys, a@1 through z@1.
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// b. a RANGEKEYSET [a, z)@1
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// c. a RANGEKEYUNSET [a, z)@2
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// d. a RANGEKEYDEL [a, b)
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// 2. A WAL for an unflushed memtable containing:
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// a. A single point key a@2.
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// b. a RANGEKEYSET [a, z)@3
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// c. a RANGEKEYUNSET [a, z)@4
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// d. a RANGEKEYDEL [a, b)
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package main
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import (
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"io/fs"
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"os"
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"path/filepath"
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"github.com/cockroachdb/pebble"
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"github.com/cockroachdb/pebble/internal/testkeys"
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"github.com/cockroachdb/pebble/vfs"
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)
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const outDir = "./tool/testdata/mixed"
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func main() {
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err := filepath.WalkDir(outDir, func(path string, d fs.DirEntry, err error) error {
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if err != nil {
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return err
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}
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if filepath.Base(path) == "main.go" || d.IsDir() {
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return nil
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}
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return os.Remove(path)
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})
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if err != nil {
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panic(err)
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}
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lel := pebble.MakeLoggingEventListener(pebble.DefaultLogger)
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opts := &pebble.Options{
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FS: vfs.Default,
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Comparer: testkeys.Comparer,
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FormatMajorVersion: pebble.FormatNewest,
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EventListener: &lel,
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DisableAutomaticCompactions: true,
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}
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db, err := pebble.Open(outDir, opts)
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if err != nil {
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panic(err)
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}
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writePoint := func(b *pebble.Batch, k []byte) {
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if err := b.Set(k, nil, nil); err != nil {
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panic(err)
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}
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}
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writeRangeKeySet := func(b *pebble.Batch, start, end, suffix []byte) {
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if err := b.RangeKeySet(start, end, suffix, nil, nil); err != nil {
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panic(err)
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}
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}
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writeRangeKeyUnset := func(b *pebble.Batch, start, end, suffix []byte) {
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if err := b.RangeKeyUnset(start, end, suffix, nil); err != nil {
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panic(err)
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}
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}
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writeRangeKeyDel := func(b *pebble.Batch, start, end []byte) {
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if err := b.RangeKeyDelete(start, end, nil); err != nil {
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panic(err)
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}
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}
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// Write some point and range keys.
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ks := testkeys.Alpha(1)
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b := db.NewBatch()
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for i := int64(0); i < ks.Count(); i++ {
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writePoint(b, testkeys.KeyAt(ks, i, 1))
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}
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start, end := testkeys.Key(ks, 0), testkeys.Key(ks, ks.Count()-1)
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writeRangeKeySet(b, start, end, testkeys.Suffix(1)) // SET [a, z)@1
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writeRangeKeyUnset(b, start, end, testkeys.Suffix(2)) // UNSET [a, z)@2
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writeRangeKeyDel(b, start, testkeys.Key(ks, 1)) // DEL [a, b)
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if err := b.Commit(nil); err != nil {
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panic(err)
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}
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// Flush memtables.
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if err := db.Flush(); err != nil {
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panic(err)
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}
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// Write one more point and range key into a memtable before closing, so the
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// WAL is not empty.
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b = db.NewBatch()
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writePoint(b, testkeys.KeyAt(ks, 0, 2))
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writeRangeKeySet(b, start, end, testkeys.Suffix(3)) // SET [a, z)@3
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writeRangeKeyUnset(b, start, end, testkeys.Suffix(4)) // UNSET [a, z)@4
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writeRangeKeyDel(b, start, testkeys.Key(ks, 1)) // DEL [a, b)
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if err := b.Commit(nil); err != nil {
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panic(err)
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}
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}
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