361 lines
11 KiB
Go
361 lines
11 KiB
Go
// Copyright 2019 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package chunk
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import (
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"bytes"
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"fmt"
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"io"
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"math/rand"
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"os"
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"path/filepath"
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"reflect"
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"strconv"
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"strings"
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"testing"
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"github.com/cznic/mathutil"
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"github.com/pingcap/check"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/config"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/types/json"
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"github.com/pingcap/tidb/util/checksum"
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"github.com/pingcap/tidb/util/encrypt"
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)
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func initChunks(numChk, numRow int) ([]*Chunk, []*types.FieldType) {
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fields := []*types.FieldType{
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types.NewFieldType(mysql.TypeVarString),
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types.NewFieldType(mysql.TypeLonglong),
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types.NewFieldType(mysql.TypeVarString),
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types.NewFieldType(mysql.TypeLonglong),
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types.NewFieldType(mysql.TypeJSON),
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}
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chks := make([]*Chunk, 0, numChk)
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for chkIdx := 0; chkIdx < numChk; chkIdx++ {
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chk := NewChunkWithCapacity(fields, numRow)
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for rowIdx := 0; rowIdx < numRow; rowIdx++ {
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data := int64(chkIdx*numRow + rowIdx)
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chk.AppendString(0, fmt.Sprint(data))
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chk.AppendNull(1)
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chk.AppendNull(2)
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chk.AppendInt64(3, data)
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if chkIdx%2 == 0 {
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chk.AppendJSON(4, json.CreateBinary(fmt.Sprint(data)))
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} else {
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chk.AppendNull(4)
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}
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}
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chks = append(chks, chk)
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}
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return chks, fields
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}
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func (s *testChunkSuite) TestListInDisk(c *check.C) {
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numChk, numRow := 2, 2
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chks, fields := initChunks(numChk, numRow)
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l := NewListInDisk(fields)
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defer func() {
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err := l.Close()
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c.Check(err, check.IsNil)
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c.Check(l.disk, check.NotNil)
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_, err = os.Stat(l.disk.Name())
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c.Check(os.IsNotExist(err), check.IsTrue)
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}()
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for _, chk := range chks {
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err := l.Add(chk)
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c.Check(err, check.IsNil)
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}
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c.Assert(strings.HasPrefix(l.disk.Name(), filepath.Join(os.TempDir(), "oom-use-tmp-storage")), check.Equals, true)
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c.Check(l.NumChunks(), check.Equals, numChk)
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c.Check(l.GetDiskTracker().BytesConsumed() > 0, check.IsTrue)
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for chkIdx := 0; chkIdx < numChk; chkIdx++ {
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for rowIdx := 0; rowIdx < numRow; rowIdx++ {
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row, err := l.GetRow(RowPtr{ChkIdx: uint32(chkIdx), RowIdx: uint32(rowIdx)})
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c.Check(err, check.IsNil)
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c.Check(row.GetDatumRow(fields), check.DeepEquals, chks[chkIdx].GetRow(rowIdx).GetDatumRow(fields))
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}
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}
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}
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func BenchmarkListInDiskAdd(b *testing.B) {
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numChk, numRow := 1, 2
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chks, fields := initChunks(numChk, numRow)
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chk := chks[0]
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l := NewListInDisk(fields)
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defer l.Close()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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err := l.Add(chk)
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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func BenchmarkListInDiskGetRow(b *testing.B) {
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numChk, numRow := 10000, 2
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chks, fields := initChunks(numChk, numRow)
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l := NewListInDisk(fields)
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defer l.Close()
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for _, chk := range chks {
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err := l.Add(chk)
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if err != nil {
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b.Fatal(err)
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}
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}
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rand.Seed(0)
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ptrs := make([]RowPtr, 0, b.N)
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for i := 0; i < mathutil.Min(b.N, 10000); i++ {
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ptrs = append(ptrs, RowPtr{
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ChkIdx: rand.Uint32() % uint32(numChk),
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RowIdx: rand.Uint32() % uint32(numRow),
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})
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}
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for i := 10000; i < cap(ptrs); i++ {
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ptrs = append(ptrs, ptrs[i%10000])
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := l.GetRow(ptrs[i])
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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type listInDiskWriteDisk struct {
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ListInDisk
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}
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func newListInDiskWriteDisk(fieldTypes []*types.FieldType) (*listInDiskWriteDisk, error) {
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l := listInDiskWriteDisk{*NewListInDisk(fieldTypes)}
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disk, err := os.CreateTemp(config.GetGlobalConfig().TempStoragePath, strconv.Itoa(l.diskTracker.Label()))
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if err != nil {
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return nil, err
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}
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l.disk = disk
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l.w = disk
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return &l, nil
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}
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func (l *listInDiskWriteDisk) GetRow(ptr RowPtr) (row Row, err error) {
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err = l.flush()
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if err != nil {
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return
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}
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off := l.offsets[ptr.ChkIdx][ptr.RowIdx]
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r := io.NewSectionReader(l.disk, off, l.offWrite-off)
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format := rowInDisk{numCol: len(l.fieldTypes)}
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_, err = format.ReadFrom(r)
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if err != nil {
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return row, err
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}
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row = format.toMutRow(l.fieldTypes).ToRow()
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return row, err
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}
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func checkRow(c *check.C, row1, row2 Row) {
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c.Assert(row1.GetString(0), check.Equals, row2.GetString(0))
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c.Assert(row1.GetInt64(1), check.Equals, row2.GetInt64(1))
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c.Assert(row1.GetString(2), check.Equals, row2.GetString(2))
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c.Assert(row1.GetInt64(3), check.Equals, row2.GetInt64(3))
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if !row1.IsNull(4) {
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c.Assert(row1.GetJSON(4).String(), check.Equals, row2.GetJSON(4).String())
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}
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}
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func testListInDisk(c *check.C) {
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numChk, numRow := 10, 1000
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chks, fields := initChunks(numChk, numRow)
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lChecksum := NewListInDisk(fields)
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defer lChecksum.Close()
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lDisk, err := newListInDiskWriteDisk(fields)
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c.Assert(err, check.IsNil)
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defer lDisk.Close()
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for _, chk := range chks {
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err := lChecksum.Add(chk)
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c.Assert(err, check.IsNil)
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err = lDisk.Add(chk)
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c.Assert(err, check.IsNil)
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}
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var ptrs []RowPtr
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for i := 0; i < numChk; i++ {
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for j := 0; j < numRow; j++ {
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ptrs = append(ptrs, RowPtr{
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ChkIdx: uint32(i),
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RowIdx: uint32(j),
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})
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}
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}
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for _, rowPtr := range ptrs {
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row1, err := lChecksum.GetRow(rowPtr)
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c.Assert(err, check.IsNil)
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row2, err := lDisk.GetRow(rowPtr)
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c.Assert(err, check.IsNil)
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checkRow(c, row1, row2)
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}
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}
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func (s *testChunkSuite) TestListInDiskWithChecksum(c *check.C) {
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defer config.RestoreFunc()()
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config.UpdateGlobal(func(conf *config.Config) {
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conf.Security.SpilledFileEncryptionMethod = config.SpilledFileEncryptionMethodPlaintext
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})
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testListInDisk(c)
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testReaderWithCache(c)
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testReaderWithCacheNoFlush(c)
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}
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func (s *testChunkSuite) TestListInDiskWithChecksumAndEncrypt(c *check.C) {
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defer config.RestoreFunc()()
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config.UpdateGlobal(func(conf *config.Config) {
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conf.Security.SpilledFileEncryptionMethod = config.SpilledFileEncryptionMethodAES128CTR
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})
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testListInDisk(c)
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testReaderWithCache(c)
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testReaderWithCacheNoFlush(c)
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}
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// Following diagram describes the testdata we use to test:
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// 4 B: checksum of this segment.
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// 8 B: all columns' length, in the following example, we will only have one column.
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// 1012 B: data in file. because max length of each segment is 1024, so we only have 1020B for user payload.
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//
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// Data in File Data in mem cache
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// +------+------------------------------------------+ +-----------------------------+
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// | | 1020B payload | | |
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// |4Bytes| +---------+----------------------------+ | | |
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// |checksum|8B collen| 1012B user data | | | 12B remained user data |
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// | | +---------+----------------------------+ | | |
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// | | | | |
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// +------+------------------------------------------+ +-----------------------------+
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func testReaderWithCache(c *check.C) {
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testData := "0123456789"
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buf := bytes.NewBuffer(nil)
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for i := 0; i < 102; i++ {
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buf.WriteString(testData)
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}
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buf.WriteString("0123")
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field := []*types.FieldType{types.NewFieldType(mysql.TypeString)}
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chk := NewChunkWithCapacity(field, 1)
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chk.AppendString(0, buf.String())
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l := NewListInDisk(field)
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err := l.Add(chk)
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c.Assert(err, check.IsNil)
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// Basic test for GetRow().
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row, err := l.GetRow(RowPtr{0, 0})
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c.Assert(err, check.IsNil)
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c.Assert(row.GetDatumRow(field), check.DeepEquals, chk.GetRow(0).GetDatumRow(field))
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var underlying io.ReaderAt = l.disk
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if l.ctrCipher != nil {
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underlying = NewReaderWithCache(encrypt.NewReader(l.disk, l.ctrCipher), l.cipherWriter.GetCache(), l.cipherWriter.GetCacheDataOffset())
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}
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checksumReader := NewReaderWithCache(checksum.NewReader(underlying), l.checksumWriter.GetCache(), l.checksumWriter.GetCacheDataOffset())
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// Read all data.
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data := make([]byte, 1024)
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// Offset is 8, because we want to ignore col length.
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readCnt, err := checksumReader.ReadAt(data, 8)
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c.Assert(err, check.IsNil)
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c.Assert(readCnt, check.Equals, 1024)
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c.Assert(reflect.DeepEqual(data, buf.Bytes()), check.IsTrue)
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// Only read data of mem cache.
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data = make([]byte, 1024)
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readCnt, err = checksumReader.ReadAt(data, 1020)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, 12)
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c.Assert(reflect.DeepEqual(data[:12], buf.Bytes()[1012:]), check.IsTrue)
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// Read partial data of mem cache.
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data = make([]byte, 1024)
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readCnt, err = checksumReader.ReadAt(data, 1025)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, 7)
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c.Assert(reflect.DeepEqual(data[:7], buf.Bytes()[1017:]), check.IsTrue)
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// Read partial data from both file and mem cache.
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data = make([]byte, 1024)
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readCnt, err = checksumReader.ReadAt(data, 1010)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, 22)
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c.Assert(reflect.DeepEqual(data[:22], buf.Bytes()[1002:]), check.IsTrue)
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// Offset is too large, so no data is read.
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data = make([]byte, 1024)
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readCnt, err = checksumReader.ReadAt(data, 1032)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, 0)
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c.Assert(reflect.DeepEqual(data, make([]byte, 1024)), check.IsTrue)
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// Only read 1 byte from mem cache.
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data = make([]byte, 1024)
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readCnt, err = checksumReader.ReadAt(data, 1031)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, 1)
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c.Assert(reflect.DeepEqual(data[:1], buf.Bytes()[1023:]), check.IsTrue)
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// Test user requested data is small.
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// Only request 10 bytes.
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data = make([]byte, 10)
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readCnt, err = checksumReader.ReadAt(data, 1010)
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c.Assert(err, check.IsNil)
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c.Assert(readCnt, check.Equals, 10)
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c.Assert(reflect.DeepEqual(data, buf.Bytes()[1002:1012]), check.IsTrue)
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}
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// Here we test situations where size of data is small, so no data is flushed to disk.
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func testReaderWithCacheNoFlush(c *check.C) {
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testData := "0123456789"
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field := []*types.FieldType{types.NewFieldType(mysql.TypeString)}
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chk := NewChunkWithCapacity(field, 1)
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chk.AppendString(0, testData)
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l := NewListInDisk(field)
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err := l.Add(chk)
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c.Assert(err, check.IsNil)
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// Basic test for GetRow().
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row, err := l.GetRow(RowPtr{0, 0})
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c.Assert(err, check.IsNil)
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c.Assert(row.GetDatumRow(field), check.DeepEquals, chk.GetRow(0).GetDatumRow(field))
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var underlying io.ReaderAt = l.disk
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if l.ctrCipher != nil {
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underlying = NewReaderWithCache(encrypt.NewReader(l.disk, l.ctrCipher), l.cipherWriter.GetCache(), l.cipherWriter.GetCacheDataOffset())
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}
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checksumReader := NewReaderWithCache(checksum.NewReader(underlying), l.checksumWriter.GetCache(), l.checksumWriter.GetCacheDataOffset())
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// Read all data.
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data := make([]byte, 1024)
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// Offset is 8, because we want to ignore col length.
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readCnt, err := checksumReader.ReadAt(data, 8)
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c.Assert(err, check.Equals, io.EOF)
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c.Assert(readCnt, check.Equals, len(testData))
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c.Assert(reflect.DeepEqual(data[:10], []byte(testData)), check.IsTrue)
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}
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