plugeth/core/rawdb/freezer_table_test.go

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2019-07-22 09:17:27 +00:00
// Copyright 2019 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rawdb
import (
"bytes"
"encoding/binary"
"fmt"
"math/rand"
"os"
"path/filepath"
"reflect"
"sync/atomic"
"testing"
"testing/quick"
"github.com/davecgh/go-spew/spew"
"github.com/ethereum/go-ethereum/metrics"
"github.com/stretchr/testify/require"
)
// TestFreezerBasics test initializing a freezertable from scratch, writing to the table,
// and reading it back.
func TestFreezerBasics(t *testing.T) {
t.Parallel()
// set cutoff at 50 bytes
f, err := newTable(os.TempDir(),
fmt.Sprintf("unittest-%d", rand.Uint64()),
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
// Write 15 bytes 255 times, results in 85 files
writeChunks(t, f, 255, 15)
//print(t, f, 0)
//print(t, f, 1)
//print(t, f, 2)
//
//db[0] = 000000000000000000000000000000
//db[1] = 010101010101010101010101010101
//db[2] = 020202020202020202020202020202
for y := 0; y < 255; y++ {
exp := getChunk(15, y)
got, err := f.Retrieve(uint64(y))
if err != nil {
t.Fatalf("reading item %d: %v", y, err)
}
if !bytes.Equal(got, exp) {
t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
}
}
// Check that we cannot read too far
_, err = f.Retrieve(uint64(255))
if err != errOutOfBounds {
t.Fatal(err)
}
}
// TestFreezerBasicsClosing tests same as TestFreezerBasics, but also closes and reopens the freezer between
// every operation
func TestFreezerBasicsClosing(t *testing.T) {
t.Parallel()
// set cutoff at 50 bytes
var (
fname = fmt.Sprintf("basics-close-%d", rand.Uint64())
rm, wm, sg = metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
f *freezerTable
err error
)
f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 255 times, results in 85 files.
// In-between writes, the table is closed and re-opened.
for x := 0; x < 255; x++ {
data := getChunk(15, x)
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(uint64(x), data))
require.NoError(t, batch.commit())
f.Close()
f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
}
defer f.Close()
for y := 0; y < 255; y++ {
exp := getChunk(15, y)
got, err := f.Retrieve(uint64(y))
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(got, exp) {
t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
}
f.Close()
f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
}
}
// TestFreezerRepairDanglingHead tests that we can recover if index entries are removed
func TestFreezerRepairDanglingHead(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("dangling_headtest-%d", rand.Uint64())
// Fill table
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 255 times
writeChunks(t, f, 255, 15)
// The last item should be there
if _, err = f.Retrieve(0xfe); err != nil {
t.Fatal(err)
}
f.Close()
}
// open the index
idxFile, err := os.OpenFile(filepath.Join(os.TempDir(), fmt.Sprintf("%s.ridx", fname)), os.O_RDWR, 0644)
if err != nil {
t.Fatalf("Failed to open index file: %v", err)
}
// Remove 4 bytes
stat, err := idxFile.Stat()
if err != nil {
t.Fatalf("Failed to stat index file: %v", err)
}
idxFile.Truncate(stat.Size() - 4)
idxFile.Close()
// Now open it again
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// The last item should be missing
if _, err = f.Retrieve(0xff); err == nil {
t.Errorf("Expected error for missing index entry")
}
// The one before should still be there
if _, err = f.Retrieve(0xfd); err != nil {
t.Fatalf("Expected no error, got %v", err)
}
}
}
// TestFreezerRepairDanglingHeadLarge tests that we can recover if very many index entries are removed
func TestFreezerRepairDanglingHeadLarge(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("dangling_headtest-%d", rand.Uint64())
// Fill a table and close it
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 255 times
writeChunks(t, f, 255, 15)
// The last item should be there
if _, err = f.Retrieve(f.items - 1); err != nil {
t.Fatal(err)
}
f.Close()
}
// open the index
idxFile, err := os.OpenFile(filepath.Join(os.TempDir(), fmt.Sprintf("%s.ridx", fname)), os.O_RDWR, 0644)
if err != nil {
t.Fatalf("Failed to open index file: %v", err)
}
// Remove everything but the first item, and leave data unaligned
// 0-indexEntry, 1-indexEntry, corrupt-indexEntry
idxFile.Truncate(2*indexEntrySize + indexEntrySize/2)
idxFile.Close()
// Now open it again
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// The first item should be there
if _, err = f.Retrieve(0); err != nil {
t.Fatal(err)
}
// The second item should be missing
if _, err = f.Retrieve(1); err == nil {
t.Errorf("Expected error for missing index entry")
}
// We should now be able to store items again, from item = 1
batch := f.newBatch()
for x := 1; x < 0xff; x++ {
require.NoError(t, batch.AppendRaw(uint64(x), getChunk(15, ^x)))
}
require.NoError(t, batch.commit())
f.Close()
}
// And if we open it, we should now be able to read all of them (new values)
{
f, _ := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
for y := 1; y < 255; y++ {
exp := getChunk(15, ^y)
got, err := f.Retrieve(uint64(y))
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(got, exp) {
t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
}
}
}
}
// TestSnappyDetection tests that we fail to open a snappy database and vice versa
func TestSnappyDetection(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("snappytest-%d", rand.Uint64())
// Open with snappy
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 255 times
writeChunks(t, f, 255, 15)
f.Close()
}
// Open without snappy
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, false, false)
if err != nil {
t.Fatal(err)
}
if _, err = f.Retrieve(0); err == nil {
f.Close()
t.Fatalf("expected empty table")
}
}
// Open with snappy
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// There should be 255 items
if _, err = f.Retrieve(0xfe); err != nil {
f.Close()
t.Fatalf("expected no error, got %v", err)
}
}
}
func assertFileSize(f string, size int64) error {
stat, err := os.Stat(f)
if err != nil {
return err
}
if stat.Size() != size {
return fmt.Errorf("error, expected size %d, got %d", size, stat.Size())
}
return nil
}
// TestFreezerRepairDanglingIndex checks that if the index has more entries than there are data,
// the index is repaired
func TestFreezerRepairDanglingIndex(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("dangling_indextest-%d", rand.Uint64())
// Fill a table and close it
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 9 times : 150 bytes
writeChunks(t, f, 9, 15)
// The last item should be there
if _, err = f.Retrieve(f.items - 1); err != nil {
f.Close()
t.Fatal(err)
}
f.Close()
// File sizes should be 45, 45, 45 : items[3, 3, 3)
}
// Crop third file
fileToCrop := filepath.Join(os.TempDir(), fmt.Sprintf("%s.0002.rdat", fname))
// Truncate third file: 45 ,45, 20
{
if err := assertFileSize(fileToCrop, 45); err != nil {
t.Fatal(err)
}
file, err := os.OpenFile(fileToCrop, os.O_RDWR, 0644)
if err != nil {
t.Fatal(err)
}
file.Truncate(20)
file.Close()
}
// Open db it again
// It should restore the file(s) to
// 45, 45, 15
// with 3+3+1 items
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
if f.items != 7 {
t.Fatalf("expected %d items, got %d", 7, f.items)
}
if err := assertFileSize(fileToCrop, 15); err != nil {
t.Fatal(err)
}
}
}
func TestFreezerTruncate(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("truncation-%d", rand.Uint64())
// Fill table
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 30 times
writeChunks(t, f, 30, 15)
// The last item should be there
if _, err = f.Retrieve(f.items - 1); err != nil {
t.Fatal(err)
}
f.Close()
}
// Reopen, truncate
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
f.truncateHead(10) // 150 bytes
if f.items != 10 {
t.Fatalf("expected %d items, got %d", 10, f.items)
}
// 45, 45, 45, 15 -- bytes should be 15
if f.headBytes != 15 {
t.Fatalf("expected %d bytes, got %d", 15, f.headBytes)
}
}
}
// TestFreezerRepairFirstFile tests a head file with the very first item only half-written.
// That will rewind the index, and _should_ truncate the head file
func TestFreezerRepairFirstFile(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("truncationfirst-%d", rand.Uint64())
// Fill table
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 80 bytes, splitting out into two files
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(0, getChunk(40, 0xFF)))
require.NoError(t, batch.AppendRaw(1, getChunk(40, 0xEE)))
require.NoError(t, batch.commit())
// The last item should be there
if _, err = f.Retrieve(1); err != nil {
t.Fatal(err)
}
f.Close()
}
// Truncate the file in half
fileToCrop := filepath.Join(os.TempDir(), fmt.Sprintf("%s.0001.rdat", fname))
{
if err := assertFileSize(fileToCrop, 40); err != nil {
t.Fatal(err)
}
file, err := os.OpenFile(fileToCrop, os.O_RDWR, 0644)
if err != nil {
t.Fatal(err)
}
file.Truncate(20)
file.Close()
}
// Reopen
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
if f.items != 1 {
f.Close()
t.Fatalf("expected %d items, got %d", 0, f.items)
}
// Write 40 bytes
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(1, getChunk(40, 0xDD)))
require.NoError(t, batch.commit())
f.Close()
// Should have been truncated down to zero and then 40 written
if err := assertFileSize(fileToCrop, 40); err != nil {
t.Fatal(err)
}
}
}
// TestFreezerReadAndTruncate tests:
// - we have a table open
// - do some reads, so files are open in readonly
// - truncate so those files are 'removed'
// - check that we did not keep the rdonly file descriptors
func TestFreezerReadAndTruncate(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("read_truncate-%d", rand.Uint64())
// Fill table
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 30 times
writeChunks(t, f, 30, 15)
// The last item should be there
if _, err = f.Retrieve(f.items - 1); err != nil {
t.Fatal(err)
}
f.Close()
}
// Reopen and read all files
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
if f.items != 30 {
f.Close()
t.Fatalf("expected %d items, got %d", 0, f.items)
}
for y := byte(0); y < 30; y++ {
f.Retrieve(uint64(y))
}
// Now, truncate back to zero
f.truncateHead(0)
// Write the data again
batch := f.newBatch()
for x := 0; x < 30; x++ {
require.NoError(t, batch.AppendRaw(uint64(x), getChunk(15, ^x)))
}
require.NoError(t, batch.commit())
f.Close()
}
}
func TestFreezerOffset(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("offset-%d", rand.Uint64())
// Fill table
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
// Write 6 x 20 bytes, splitting out into three files
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(0, getChunk(20, 0xFF)))
require.NoError(t, batch.AppendRaw(1, getChunk(20, 0xEE)))
require.NoError(t, batch.AppendRaw(2, getChunk(20, 0xdd)))
require.NoError(t, batch.AppendRaw(3, getChunk(20, 0xcc)))
require.NoError(t, batch.AppendRaw(4, getChunk(20, 0xbb)))
require.NoError(t, batch.AppendRaw(5, getChunk(20, 0xaa)))
require.NoError(t, batch.commit())
t.Log(f.dumpIndexString(0, 100))
f.Close()
}
// Now crop it.
{
// delete files 0 and 1
for i := 0; i < 2; i++ {
p := filepath.Join(os.TempDir(), fmt.Sprintf("%v.%04d.rdat", fname, i))
if err := os.Remove(p); err != nil {
t.Fatal(err)
}
}
// Read the index file
p := filepath.Join(os.TempDir(), fmt.Sprintf("%v.ridx", fname))
indexFile, err := os.OpenFile(p, os.O_RDWR, 0644)
if err != nil {
t.Fatal(err)
}
indexBuf := make([]byte, 7*indexEntrySize)
indexFile.Read(indexBuf)
// Update the index file, so that we store
// [ file = 2, offset = 4 ] at index zero
zeroIndex := indexEntry{
filenum: uint32(2), // First file is 2
offset: uint32(4), // We have removed four items
}
buf := zeroIndex.append(nil)
// Overwrite index zero
copy(indexBuf, buf)
// Remove the four next indices by overwriting
copy(indexBuf[indexEntrySize:], indexBuf[indexEntrySize*5:])
indexFile.WriteAt(indexBuf, 0)
// Need to truncate the moved index items
indexFile.Truncate(indexEntrySize * (1 + 2))
indexFile.Close()
}
// Now open again
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
t.Log(f.dumpIndexString(0, 100))
// It should allow writing item 6.
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(6, getChunk(20, 0x99)))
require.NoError(t, batch.commit())
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
1: errOutOfBounds,
2: errOutOfBounds,
3: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x99),
})
}
// Edit the index again, with a much larger initial offset of 1M.
{
// Read the index file
p := filepath.Join(os.TempDir(), fmt.Sprintf("%v.ridx", fname))
indexFile, err := os.OpenFile(p, os.O_RDWR, 0644)
if err != nil {
t.Fatal(err)
}
indexBuf := make([]byte, 3*indexEntrySize)
indexFile.Read(indexBuf)
// Update the index file, so that we store
// [ file = 2, offset = 1M ] at index zero
zeroIndex := indexEntry{
offset: uint32(1000000), // We have removed 1M items
filenum: uint32(2), // First file is 2
}
buf := zeroIndex.append(nil)
// Overwrite index zero
copy(indexBuf, buf)
indexFile.WriteAt(indexBuf, 0)
indexFile.Close()
}
// Check that existing items have been moved to index 1M.
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
t.Log(f.dumpIndexString(0, 100))
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
1: errOutOfBounds,
2: errOutOfBounds,
3: errOutOfBounds,
999999: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
1000000: getChunk(20, 0xbb),
1000001: getChunk(20, 0xaa),
})
}
}
func TestTruncateTail(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("truncate-tail-%d", rand.Uint64())
// Fill table
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
// Write 7 x 20 bytes, splitting out into four files
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(0, getChunk(20, 0xFF)))
require.NoError(t, batch.AppendRaw(1, getChunk(20, 0xEE)))
require.NoError(t, batch.AppendRaw(2, getChunk(20, 0xdd)))
require.NoError(t, batch.AppendRaw(3, getChunk(20, 0xcc)))
require.NoError(t, batch.AppendRaw(4, getChunk(20, 0xbb)))
require.NoError(t, batch.AppendRaw(5, getChunk(20, 0xaa)))
require.NoError(t, batch.AppendRaw(6, getChunk(20, 0x11)))
require.NoError(t, batch.commit())
// nothing to do, all the items should still be there.
f.truncateTail(0)
fmt.Println(f.dumpIndexString(0, 1000))
checkRetrieve(t, f, map[uint64][]byte{
0: getChunk(20, 0xFF),
1: getChunk(20, 0xEE),
2: getChunk(20, 0xdd),
3: getChunk(20, 0xcc),
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
// truncate single element( item 0 ), deletion is only supported at file level
f.truncateTail(1)
fmt.Println(f.dumpIndexString(0, 1000))
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
1: getChunk(20, 0xEE),
2: getChunk(20, 0xdd),
3: getChunk(20, 0xcc),
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
// Reopen the table, the deletion information should be persisted as well
f.Close()
f, err = newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
1: getChunk(20, 0xEE),
2: getChunk(20, 0xdd),
3: getChunk(20, 0xcc),
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
// truncate two elements( item 0, item 1 ), the file 0 should be deleted
f.truncateTail(2)
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
1: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
2: getChunk(20, 0xdd),
3: getChunk(20, 0xcc),
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
// Reopen the table, the above testing should still pass
f.Close()
f, err = newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
defer f.Close()
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
1: errOutOfBounds,
})
checkRetrieve(t, f, map[uint64][]byte{
2: getChunk(20, 0xdd),
3: getChunk(20, 0xcc),
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
// truncate all, the entire freezer should be deleted
f.truncateTail(7)
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds,
1: errOutOfBounds,
2: errOutOfBounds,
3: errOutOfBounds,
4: errOutOfBounds,
5: errOutOfBounds,
6: errOutOfBounds,
})
}
func TestTruncateHead(t *testing.T) {
t.Parallel()
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("truncate-head-blow-tail-%d", rand.Uint64())
// Fill table
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
// Write 7 x 20 bytes, splitting out into four files
batch := f.newBatch()
require.NoError(t, batch.AppendRaw(0, getChunk(20, 0xFF)))
require.NoError(t, batch.AppendRaw(1, getChunk(20, 0xEE)))
require.NoError(t, batch.AppendRaw(2, getChunk(20, 0xdd)))
require.NoError(t, batch.AppendRaw(3, getChunk(20, 0xcc)))
require.NoError(t, batch.AppendRaw(4, getChunk(20, 0xbb)))
require.NoError(t, batch.AppendRaw(5, getChunk(20, 0xaa)))
require.NoError(t, batch.AppendRaw(6, getChunk(20, 0x11)))
require.NoError(t, batch.commit())
f.truncateTail(4) // Tail = 4
// NewHead is required to be 3, the entire table should be truncated
f.truncateHead(4)
checkRetrieveError(t, f, map[uint64]error{
0: errOutOfBounds, // Deleted by tail
1: errOutOfBounds, // Deleted by tail
2: errOutOfBounds, // Deleted by tail
3: errOutOfBounds, // Deleted by tail
4: errOutOfBounds, // Deleted by Head
5: errOutOfBounds, // Deleted by Head
6: errOutOfBounds, // Deleted by Head
})
// Append new items
batch = f.newBatch()
require.NoError(t, batch.AppendRaw(4, getChunk(20, 0xbb)))
require.NoError(t, batch.AppendRaw(5, getChunk(20, 0xaa)))
require.NoError(t, batch.AppendRaw(6, getChunk(20, 0x11)))
require.NoError(t, batch.commit())
checkRetrieve(t, f, map[uint64][]byte{
4: getChunk(20, 0xbb),
5: getChunk(20, 0xaa),
6: getChunk(20, 0x11),
})
}
func checkRetrieve(t *testing.T, f *freezerTable, items map[uint64][]byte) {
t.Helper()
for item, wantBytes := range items {
value, err := f.Retrieve(item)
if err != nil {
t.Fatalf("can't get expected item %d: %v", item, err)
}
if !bytes.Equal(value, wantBytes) {
t.Fatalf("item %d has wrong value %x (want %x)", item, value, wantBytes)
}
}
}
func checkRetrieveError(t *testing.T, f *freezerTable, items map[uint64]error) {
t.Helper()
for item, wantError := range items {
value, err := f.Retrieve(item)
if err == nil {
t.Fatalf("unexpected value %x for item %d, want error %v", item, value, wantError)
}
if err != wantError {
t.Fatalf("wrong error for item %d: %v", item, err)
}
}
}
// Gets a chunk of data, filled with 'b'
func getChunk(size int, b int) []byte {
data := make([]byte, size)
for i := range data {
data[i] = byte(b)
}
return data
}
// TODO (?)
// - test that if we remove several head-files, aswell as data last data-file,
// the index is truncated accordingly
// Right now, the freezer would fail on these conditions:
// 1. have data files d0, d1, d2, d3
// 2. remove d2,d3
//
// However, all 'normal' failure modes arising due to failing to sync() or save a file
// should be handled already, and the case described above can only (?) happen if an
// external process/user deletes files from the filesystem.
func writeChunks(t *testing.T, ft *freezerTable, n int, length int) {
t.Helper()
batch := ft.newBatch()
for i := 0; i < n; i++ {
if err := batch.AppendRaw(uint64(i), getChunk(length, i)); err != nil {
t.Fatalf("AppendRaw(%d, ...) returned error: %v", i, err)
}
}
if err := batch.commit(); err != nil {
t.Fatalf("Commit returned error: %v", err)
}
}
// TestSequentialRead does some basic tests on the RetrieveItems.
func TestSequentialRead(t *testing.T) {
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("batchread-%d", rand.Uint64())
{ // Fill table
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
// Write 15 bytes 30 times
writeChunks(t, f, 30, 15)
f.dumpIndexStdout(0, 30)
f.Close()
}
{ // Open it, iterate, verify iteration
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true, false)
if err != nil {
t.Fatal(err)
}
items, err := f.RetrieveItems(0, 10000, 100000)
if err != nil {
t.Fatal(err)
}
if have, want := len(items), 30; have != want {
t.Fatalf("want %d items, have %d ", want, have)
}
for i, have := range items {
want := getChunk(15, i)
if !bytes.Equal(want, have) {
t.Fatalf("data corruption: have\n%x\n, want \n%x\n", have, want)
}
}
f.Close()
}
{ // Open it, iterate, verify byte limit. The byte limit is less than item
// size, so each lookup should only return one item
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 40, true, false)
if err != nil {
t.Fatal(err)
}
items, err := f.RetrieveItems(0, 10000, 10)
if err != nil {
t.Fatal(err)
}
if have, want := len(items), 1; have != want {
t.Fatalf("want %d items, have %d ", want, have)
}
for i, have := range items {
want := getChunk(15, i)
if !bytes.Equal(want, have) {
t.Fatalf("data corruption: have\n%x\n, want \n%x\n", have, want)
}
}
f.Close()
}
}
// TestSequentialReadByteLimit does some more advanced tests on batch reads.
// These tests check that when the byte limit hits, we correctly abort in time,
// but also properly do all the deferred reads for the previous data, regardless
// of whether the data crosses a file boundary or not.
func TestSequentialReadByteLimit(t *testing.T) {
rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
fname := fmt.Sprintf("batchread-2-%d", rand.Uint64())
{ // Fill table
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 100, true, false)
if err != nil {
t.Fatal(err)
}
// Write 10 bytes 30 times,
// Splitting it at every 100 bytes (10 items)
writeChunks(t, f, 30, 10)
f.Close()
}
for i, tc := range []struct {
items uint64
limit uint64
want int
}{
{9, 89, 8},
{10, 99, 9},
{11, 109, 10},
{100, 89, 8},
{100, 99, 9},
{100, 109, 10},
} {
{
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 100, true, false)
if err != nil {
t.Fatal(err)
}
items, err := f.RetrieveItems(0, tc.items, tc.limit)
if err != nil {
t.Fatal(err)
}
if have, want := len(items), tc.want; have != want {
t.Fatalf("test %d: want %d items, have %d ", i, want, have)
}
for ii, have := range items {
want := getChunk(10, ii)
if !bytes.Equal(want, have) {
t.Fatalf("test %d: data corruption item %d: have\n%x\n, want \n%x\n", i, ii, have, want)
}
}
f.Close()
}
}
}
func TestFreezerReadonly(t *testing.T) {
tmpdir := os.TempDir()
// Case 1: Check it fails on non-existent file.
_, err := newTable(tmpdir,
fmt.Sprintf("readonlytest-%d", rand.Uint64()),
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, true)
if err == nil {
t.Fatal("readonly table instantiation should fail for non-existent table")
}
// Case 2: Check that it fails on invalid index length.
fname := fmt.Sprintf("readonlytest-%d", rand.Uint64())
idxFile, err := openFreezerFileForAppend(filepath.Join(tmpdir, fmt.Sprintf("%s.ridx", fname)))
if err != nil {
t.Errorf("Failed to open index file: %v\n", err)
}
// size should not be a multiple of indexEntrySize.
idxFile.Write(make([]byte, 17))
idxFile.Close()
_, err = newTable(tmpdir, fname,
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, true)
if err == nil {
t.Errorf("readonly table instantiation should fail for invalid index size")
}
// Case 3: Open table non-readonly table to write some data.
// Then corrupt the head file and make sure opening the table
// again in readonly triggers an error.
fname = fmt.Sprintf("readonlytest-%d", rand.Uint64())
f, err := newTable(tmpdir, fname,
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, false)
if err != nil {
t.Fatalf("failed to instantiate table: %v", err)
}
writeChunks(t, f, 8, 32)
// Corrupt table file
if _, err := f.head.Write([]byte{1, 1}); err != nil {
t.Fatal(err)
}
if err := f.Close(); err != nil {
t.Fatal(err)
}
_, err = newTable(tmpdir, fname,
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, true)
if err == nil {
t.Errorf("readonly table instantiation should fail for corrupt table file")
}
// Case 4: Write some data to a table and later re-open it as readonly.
// Should be successful.
fname = fmt.Sprintf("readonlytest-%d", rand.Uint64())
f, err = newTable(tmpdir, fname,
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, false)
if err != nil {
t.Fatalf("failed to instantiate table: %v\n", err)
}
writeChunks(t, f, 32, 128)
if err := f.Close(); err != nil {
t.Fatal(err)
}
f, err = newTable(tmpdir, fname,
metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, true)
if err != nil {
t.Fatal(err)
}
v, err := f.Retrieve(10)
if err != nil {
t.Fatal(err)
}
exp := getChunk(128, 10)
if !bytes.Equal(v, exp) {
t.Errorf("retrieved value is incorrect")
}
// Case 5: Now write some data via a batch.
// This should fail either during AppendRaw or Commit
batch := f.newBatch()
writeErr := batch.AppendRaw(32, make([]byte, 1))
if writeErr == nil {
writeErr = batch.commit()
}
if writeErr == nil {
t.Fatalf("Writing to readonly table should fail")
}
}
// randTest performs random freezer table operations.
// Instances of this test are created by Generate.
type randTest []randTestStep
type randTestStep struct {
op int
items []uint64 // for append and retrieve
blobs [][]byte // for append
target uint64 // for truncate(head/tail)
err error // for debugging
}
const (
opReload = iota
opAppend
opRetrieve
opTruncateHead
opTruncateHeadAll
opTruncateTail
opTruncateTailAll
opCheckAll
opMax // boundary value, not an actual op
)
func getVals(first uint64, n int) [][]byte {
var ret [][]byte
for i := 0; i < n; i++ {
val := make([]byte, 8)
binary.BigEndian.PutUint64(val, first+uint64(i))
ret = append(ret, val)
}
return ret
}
func (randTest) Generate(r *rand.Rand, size int) reflect.Value {
var (
deleted uint64 // The number of deleted items from tail
items []uint64 // The index of entries in table
// getItems retrieves the indexes for items in table.
getItems = func(n int) []uint64 {
length := len(items)
if length == 0 {
return nil
}
var ret []uint64
index := rand.Intn(length)
for i := index; len(ret) < n && i < length; i++ {
ret = append(ret, items[i])
}
return ret
}
// addItems appends the given length items into the table.
addItems = func(n int) []uint64 {
var first = deleted
if len(items) != 0 {
first = items[len(items)-1] + 1
}
var ret []uint64
for i := 0; i < n; i++ {
ret = append(ret, first+uint64(i))
}
items = append(items, ret...)
return ret
}
)
var steps randTest
for i := 0; i < size; i++ {
step := randTestStep{op: r.Intn(opMax)}
switch step.op {
case opReload, opCheckAll:
case opAppend:
num := r.Intn(3)
step.items = addItems(num)
if len(step.items) == 0 {
step.blobs = nil
} else {
step.blobs = getVals(step.items[0], num)
}
case opRetrieve:
step.items = getItems(r.Intn(3))
case opTruncateHead:
if len(items) == 0 {
step.target = deleted
} else {
index := r.Intn(len(items))
items = items[:index]
step.target = deleted + uint64(index)
}
case opTruncateHeadAll:
step.target = deleted
items = items[:0]
case opTruncateTail:
if len(items) == 0 {
step.target = deleted
} else {
index := r.Intn(len(items))
items = items[index:]
deleted += uint64(index)
step.target = deleted
}
case opTruncateTailAll:
step.target = deleted + uint64(len(items))
items = items[:0]
deleted = step.target
}
steps = append(steps, step)
}
return reflect.ValueOf(steps)
}
func runRandTest(rt randTest) bool {
fname := fmt.Sprintf("randtest-%d", rand.Uint64())
f, err := newTable(os.TempDir(), fname, metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, false)
if err != nil {
panic("failed to initialize table")
}
var values [][]byte
for i, step := range rt {
switch step.op {
case opReload:
f.Close()
f, err = newTable(os.TempDir(), fname, metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true, false)
if err != nil {
rt[i].err = fmt.Errorf("failed to reload table %v", err)
}
case opCheckAll:
tail := atomic.LoadUint64(&f.itemHidden)
head := atomic.LoadUint64(&f.items)
if tail == head {
continue
}
got, err := f.RetrieveItems(atomic.LoadUint64(&f.itemHidden), head-tail, 100000)
if err != nil {
rt[i].err = err
} else {
if !reflect.DeepEqual(got, values) {
rt[i].err = fmt.Errorf("mismatch on retrieved values %v %v", got, values)
}
}
case opAppend:
batch := f.newBatch()
for i := 0; i < len(step.items); i++ {
batch.AppendRaw(step.items[i], step.blobs[i])
}
batch.commit()
values = append(values, step.blobs...)
case opRetrieve:
var blobs [][]byte
if len(step.items) == 0 {
continue
}
tail := atomic.LoadUint64(&f.itemHidden)
for i := 0; i < len(step.items); i++ {
blobs = append(blobs, values[step.items[i]-tail])
}
got, err := f.RetrieveItems(step.items[0], uint64(len(step.items)), 100000)
if err != nil {
rt[i].err = err
} else {
if !reflect.DeepEqual(got, blobs) {
rt[i].err = fmt.Errorf("mismatch on retrieved values %v %v %v", got, blobs, step.items)
}
}
case opTruncateHead:
f.truncateHead(step.target)
length := atomic.LoadUint64(&f.items) - atomic.LoadUint64(&f.itemHidden)
values = values[:length]
case opTruncateHeadAll:
f.truncateHead(step.target)
values = nil
case opTruncateTail:
prev := atomic.LoadUint64(&f.itemHidden)
f.truncateTail(step.target)
truncated := atomic.LoadUint64(&f.itemHidden) - prev
values = values[truncated:]
case opTruncateTailAll:
f.truncateTail(step.target)
values = nil
}
// Abort the test on error.
if rt[i].err != nil {
return false
}
}
f.Close()
return true
}
func TestRandom(t *testing.T) {
if err := quick.Check(runRandTest, nil); err != nil {
if cerr, ok := err.(*quick.CheckError); ok {
t.Fatalf("random test iteration %d failed: %s", cerr.Count, spew.Sdump(cerr.In))
}
t.Fatal(err)
}
}