forked from cerc-io/plugeth
794c6133ef
This change is a rewrite of the freezer code. When writing ancient chain data to the freezer, the previous version first encoded each individual item to a temporary buffer, then wrote the buffer. For small item sizes (for example, in the block hash freezer table), this strategy causes a lot of system calls for writing tiny chunks of data. It also allocated a lot of temporary []byte buffers. In the new version, we instead encode multiple items into a re-useable batch buffer, which is then written to the file all at once. This avoids performing a system call for every inserted item. To make the internal batching work, the ancient database API had to be changed. While integrating this new API in BlockChain.InsertReceiptChain, additional optimizations were also added there. Co-authored-by: Felix Lange <fjl@twurst.com>
832 lines
21 KiB
Go
832 lines
21 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rawdb
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import (
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"bytes"
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"fmt"
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"math/rand"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/metrics"
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"github.com/stretchr/testify/require"
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)
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func init() {
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rand.Seed(time.Now().Unix())
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}
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// TestFreezerBasics test initializing a freezertable from scratch, writing to the table,
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// and reading it back.
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func TestFreezerBasics(t *testing.T) {
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t.Parallel()
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// set cutoff at 50 bytes
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f, err := newTable(os.TempDir(),
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fmt.Sprintf("unittest-%d", rand.Uint64()),
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metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge(), 50, true)
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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// Write 15 bytes 255 times, results in 85 files
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writeChunks(t, f, 255, 15)
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//print(t, f, 0)
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//print(t, f, 1)
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//print(t, f, 2)
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//
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//db[0] = 000000000000000000000000000000
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//db[1] = 010101010101010101010101010101
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//db[2] = 020202020202020202020202020202
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for y := 0; y < 255; y++ {
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exp := getChunk(15, y)
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got, err := f.Retrieve(uint64(y))
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if err != nil {
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t.Fatalf("reading item %d: %v", y, err)
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}
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if !bytes.Equal(got, exp) {
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t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
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}
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}
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// Check that we cannot read too far
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_, err = f.Retrieve(uint64(255))
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if err != errOutOfBounds {
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t.Fatal(err)
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}
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}
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// TestFreezerBasicsClosing tests same as TestFreezerBasics, but also closes and reopens the freezer between
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// every operation
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func TestFreezerBasicsClosing(t *testing.T) {
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t.Parallel()
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// set cutoff at 50 bytes
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var (
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fname = fmt.Sprintf("basics-close-%d", rand.Uint64())
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rm, wm, sg = metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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f *freezerTable
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err error
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)
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f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 255 times, results in 85 files.
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// In-between writes, the table is closed and re-opened.
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for x := 0; x < 255; x++ {
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data := getChunk(15, x)
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batch := f.newBatch()
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require.NoError(t, batch.AppendRaw(uint64(x), data))
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require.NoError(t, batch.commit())
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f.Close()
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f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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}
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defer f.Close()
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for y := 0; y < 255; y++ {
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exp := getChunk(15, y)
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got, err := f.Retrieve(uint64(y))
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(got, exp) {
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t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
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}
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f.Close()
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f, err = newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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// TestFreezerRepairDanglingHead tests that we can recover if index entries are removed
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func TestFreezerRepairDanglingHead(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("dangling_headtest-%d", rand.Uint64())
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// Fill table
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 255 times
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writeChunks(t, f, 255, 15)
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// The last item should be there
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if _, err = f.Retrieve(0xfe); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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// open the index
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idxFile, err := os.OpenFile(filepath.Join(os.TempDir(), fmt.Sprintf("%s.ridx", fname)), os.O_RDWR, 0644)
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if err != nil {
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t.Fatalf("Failed to open index file: %v", err)
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}
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// Remove 4 bytes
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stat, err := idxFile.Stat()
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if err != nil {
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t.Fatalf("Failed to stat index file: %v", err)
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}
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idxFile.Truncate(stat.Size() - 4)
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idxFile.Close()
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// Now open it again
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// The last item should be missing
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if _, err = f.Retrieve(0xff); err == nil {
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t.Errorf("Expected error for missing index entry")
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}
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// The one before should still be there
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if _, err = f.Retrieve(0xfd); err != nil {
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t.Fatalf("Expected no error, got %v", err)
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}
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}
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}
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// TestFreezerRepairDanglingHeadLarge tests that we can recover if very many index entries are removed
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func TestFreezerRepairDanglingHeadLarge(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("dangling_headtest-%d", rand.Uint64())
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// Fill a table and close it
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 255 times
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writeChunks(t, f, 255, 15)
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// The last item should be there
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if _, err = f.Retrieve(f.items - 1); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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// open the index
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idxFile, err := os.OpenFile(filepath.Join(os.TempDir(), fmt.Sprintf("%s.ridx", fname)), os.O_RDWR, 0644)
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if err != nil {
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t.Fatalf("Failed to open index file: %v", err)
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}
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// Remove everything but the first item, and leave data unaligned
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// 0-indexEntry, 1-indexEntry, corrupt-indexEntry
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idxFile.Truncate(indexEntrySize + indexEntrySize + indexEntrySize/2)
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idxFile.Close()
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// Now open it again
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// The first item should be there
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if _, err = f.Retrieve(0); err != nil {
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t.Fatal(err)
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}
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// The second item should be missing
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if _, err = f.Retrieve(1); err == nil {
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t.Errorf("Expected error for missing index entry")
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}
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// We should now be able to store items again, from item = 1
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batch := f.newBatch()
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for x := 1; x < 0xff; x++ {
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require.NoError(t, batch.AppendRaw(uint64(x), getChunk(15, ^x)))
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}
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require.NoError(t, batch.commit())
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f.Close()
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}
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// And if we open it, we should now be able to read all of them (new values)
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{
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f, _ := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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for y := 1; y < 255; y++ {
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exp := getChunk(15, ^y)
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got, err := f.Retrieve(uint64(y))
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(got, exp) {
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t.Fatalf("test %d, got \n%x != \n%x", y, got, exp)
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}
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}
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}
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}
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// TestSnappyDetection tests that we fail to open a snappy database and vice versa
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func TestSnappyDetection(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("snappytest-%d", rand.Uint64())
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// Open with snappy
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 255 times
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writeChunks(t, f, 255, 15)
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f.Close()
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}
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// Open without snappy
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, false)
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if err != nil {
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t.Fatal(err)
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}
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if _, err = f.Retrieve(0); err == nil {
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f.Close()
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t.Fatalf("expected empty table")
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}
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}
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// Open with snappy
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// There should be 255 items
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if _, err = f.Retrieve(0xfe); err != nil {
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f.Close()
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t.Fatalf("expected no error, got %v", err)
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}
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}
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}
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func assertFileSize(f string, size int64) error {
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stat, err := os.Stat(f)
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if err != nil {
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return err
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}
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if stat.Size() != size {
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return fmt.Errorf("error, expected size %d, got %d", size, stat.Size())
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}
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return nil
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}
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// TestFreezerRepairDanglingIndex checks that if the index has more entries than there are data,
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// the index is repaired
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func TestFreezerRepairDanglingIndex(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("dangling_indextest-%d", rand.Uint64())
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// Fill a table and close it
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 9 times : 150 bytes
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writeChunks(t, f, 9, 15)
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// The last item should be there
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if _, err = f.Retrieve(f.items - 1); err != nil {
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f.Close()
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t.Fatal(err)
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}
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f.Close()
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// File sizes should be 45, 45, 45 : items[3, 3, 3)
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}
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// Crop third file
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fileToCrop := filepath.Join(os.TempDir(), fmt.Sprintf("%s.0002.rdat", fname))
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// Truncate third file: 45 ,45, 20
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{
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if err := assertFileSize(fileToCrop, 45); err != nil {
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t.Fatal(err)
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}
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file, err := os.OpenFile(fileToCrop, os.O_RDWR, 0644)
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if err != nil {
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t.Fatal(err)
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}
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file.Truncate(20)
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file.Close()
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}
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// Open db it again
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// It should restore the file(s) to
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// 45, 45, 15
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// with 3+3+1 items
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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if f.items != 7 {
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t.Fatalf("expected %d items, got %d", 7, f.items)
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}
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if err := assertFileSize(fileToCrop, 15); err != nil {
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t.Fatal(err)
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}
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}
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}
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func TestFreezerTruncate(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("truncation-%d", rand.Uint64())
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// Fill table
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 30 times
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writeChunks(t, f, 30, 15)
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// The last item should be there
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if _, err = f.Retrieve(f.items - 1); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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// Reopen, truncate
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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f.truncate(10) // 150 bytes
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if f.items != 10 {
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t.Fatalf("expected %d items, got %d", 10, f.items)
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}
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// 45, 45, 45, 15 -- bytes should be 15
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if f.headBytes != 15 {
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t.Fatalf("expected %d bytes, got %d", 15, f.headBytes)
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}
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}
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}
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// TestFreezerRepairFirstFile tests a head file with the very first item only half-written.
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// That will rewind the index, and _should_ truncate the head file
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func TestFreezerRepairFirstFile(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("truncationfirst-%d", rand.Uint64())
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// Fill table
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 80 bytes, splitting out into two files
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batch := f.newBatch()
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require.NoError(t, batch.AppendRaw(0, getChunk(40, 0xFF)))
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require.NoError(t, batch.AppendRaw(1, getChunk(40, 0xEE)))
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require.NoError(t, batch.commit())
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// The last item should be there
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if _, err = f.Retrieve(1); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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// Truncate the file in half
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fileToCrop := filepath.Join(os.TempDir(), fmt.Sprintf("%s.0001.rdat", fname))
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{
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if err := assertFileSize(fileToCrop, 40); err != nil {
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t.Fatal(err)
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}
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file, err := os.OpenFile(fileToCrop, os.O_RDWR, 0644)
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if err != nil {
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t.Fatal(err)
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}
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file.Truncate(20)
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file.Close()
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}
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// Reopen
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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if f.items != 1 {
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f.Close()
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t.Fatalf("expected %d items, got %d", 0, f.items)
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}
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// Write 40 bytes
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batch := f.newBatch()
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require.NoError(t, batch.AppendRaw(1, getChunk(40, 0xDD)))
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require.NoError(t, batch.commit())
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f.Close()
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// Should have been truncated down to zero and then 40 written
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if err := assertFileSize(fileToCrop, 40); err != nil {
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t.Fatal(err)
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}
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}
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}
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// TestFreezerReadAndTruncate tests:
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// - we have a table open
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// - do some reads, so files are open in readonly
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// - truncate so those files are 'removed'
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// - check that we did not keep the rdonly file descriptors
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func TestFreezerReadAndTruncate(t *testing.T) {
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t.Parallel()
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rm, wm, sg := metrics.NewMeter(), metrics.NewMeter(), metrics.NewGauge()
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fname := fmt.Sprintf("read_truncate-%d", rand.Uint64())
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// Fill table
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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// Write 15 bytes 30 times
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writeChunks(t, f, 30, 15)
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// The last item should be there
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if _, err = f.Retrieve(f.items - 1); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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// Reopen and read all files
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{
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f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
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if err != nil {
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t.Fatal(err)
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}
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if f.items != 30 {
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f.Close()
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t.Fatalf("expected %d items, got %d", 0, f.items)
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}
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for y := byte(0); y < 30; y++ {
|
|
f.Retrieve(uint64(y))
|
|
}
|
|
|
|
// Now, truncate back to zero
|
|
f.truncate(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)
|
|
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
|
|
|
|
tailId := uint32(2) // First file is 2
|
|
itemOffset := uint32(4) // We have removed four items
|
|
zeroIndex := indexEntry{
|
|
filenum: tailId,
|
|
offset: itemOffset,
|
|
}
|
|
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)
|
|
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
|
|
|
|
tailId := uint32(2) // First file is 2
|
|
itemOffset := uint32(1000000) // We have removed 1M items
|
|
zeroIndex := indexEntry{
|
|
offset: itemOffset,
|
|
filenum: tailId,
|
|
}
|
|
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)
|
|
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 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)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
// Write 15 bytes 30 times
|
|
writeChunks(t, f, 30, 15)
|
|
f.DumpIndex(0, 30)
|
|
f.Close()
|
|
}
|
|
{ // Open it, iterate, verify iteration
|
|
f, err := newTable(os.TempDir(), fname, rm, wm, sg, 50, true)
|
|
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)
|
|
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)
|
|
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)
|
|
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()
|
|
}
|
|
}
|
|
}
|