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/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"bytes"
"context"
"crypto/rand"
"io"
"testing"
humanize "github.com/dustin/go-humanize"
)
type badDisk struct{ StorageAPI }
func (a badDisk) String() string {
return "bad-disk"
}
func (a badDisk) AppendFile(volume string, path string, buf []byte) error {
return errFaultyDisk
}
func (a badDisk) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
return nil, errFaultyDisk
}
func (a badDisk) CreateFile(volume, path string, size int64, reader io.Reader) error {
return errFaultyDisk
}
const * humanize.MiByte
var erasureEncodeTests = []struct {
dataBlocks int
onDisks, offDisks int
blocksize, data int64
offset int
algorithm BitrotAlgorithm
shouldFail, shouldFailQuorum bool
}{
{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 0
{dataBlocks: 3, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 1, algorithm: SHA256, shouldFail: false, shouldFailQuorum: false}, // 1
{dataBlocks: 4, onDisks: 8, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 2
{dataBlocks: 5, onDisks: 10, offDisks: 3, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 3
{dataBlocks: 6, onDisks: 12, offDisks: 4, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 4
{dataBlocks: 7, onDisks: 14, offDisks: 5, blocksize: int64(blockSizeV1), data: 0, offset: 0, shouldFail: false, algorithm: SHA256, shouldFailQuorum: false}, // 5
{dataBlocks: 8, onDisks: 16, offDisks: 7, blocksize: int64(blockSizeV1), data: 0, offset: 0, shouldFail: false, algorithm: DefaultBitrotAlgorithm, shouldFailQuorum: false}, // 6
{dataBlocks: 2, onDisks: 4, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: true}, // 7
{dataBlocks: 4, onDisks: 8, offDisks: 4, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: SHA256, shouldFail: false, shouldFailQuorum: true}, // 8
{dataBlocks: 7, onDisks: 14, offDisks: 7, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 9
{dataBlocks: 8, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 10
{dataBlocks: 5, onDisks: 10, offDisks: 3, blocksize: int64(oneMiByte), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 11
{dataBlocks: 3, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 12
{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(oneMiByte / 2), data: oneMiByte, offset: oneMiByte/2 + 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 13
{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(oneMiByte - 1), data: oneMiByte, offset: oneMiByte - 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 14
{dataBlocks: 8, onDisks: 12, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 15
{dataBlocks: 8, onDisks: 10, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 16
{dataBlocks: 10, onDisks: 14, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 17, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 17
{dataBlocks: 2, onDisks: 6, offDisks: 2, blocksize: int64(oneMiByte), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 18
{dataBlocks: 10, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 19
}
func TestErasureEncode(t *testing.T) {
for i, test := range erasureEncodeTests {
setup, err := newErasureTestSetup(test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
if err != nil {
t.Fatalf("Test %d: failed to create test setup: %v", i, err)
}
disks := setup.disks
erasure, err := NewErasure(context.Background(), test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
if err != nil {
setup.Remove()
t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
}
buffer := make([]byte, test.blocksize, 2*test.blocksize)
data := make([]byte, test.data)
if _, err = io.ReadFull(rand.Reader, data); err != nil {
setup.Remove()
t.Fatalf("Test %d: failed to generate random test data: %v", i, err)
}
writers := make([]io.Writer, len(disks))
for i, disk := range disks {
if disk == OfflineDisk {
continue
}
writers[i] = newBitrotWriter(disk, "testbucket", "object", erasure.ShardFileSize(int64(len(data[test.offset:]))), test.algorithm, erasure.ShardSize())
}
n, err := erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
closeBitrotWriters(writers)
if err != nil && !test.shouldFail {
t.Errorf("Test %d: should pass but failed with: %v", i, err)
}
if err == nil && test.shouldFail {
t.Errorf("Test %d: should fail but it passed", i)
}
for i, w := range writers {
if w == nil {
disks[i] = OfflineDisk
}
}
if err == nil {
if length := int64(len(data[test.offset:])); n != length {
t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
}
writers := make([]io.Writer, len(disks))
for i, disk := range disks {
if disk == nil {
continue
}
writers[i] = newBitrotWriter(disk, "testbucket", "object2", erasure.ShardFileSize(int64(len(data[test.offset:]))), test.algorithm, erasure.ShardSize())
}
for j := range disks[:test.offDisks] {
switch w := writers[j].(type) {
case *wholeBitrotWriter:
w.disk = badDisk{nil}
case *streamingBitrotWriter:
w.iow.CloseWithError(errFaultyDisk)
}
}
if test.offDisks > 0 {
writers[0] = nil
}
n, err = erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
closeBitrotWriters(writers)
if err != nil && !test.shouldFailQuorum {
t.Errorf("Test %d: should pass but failed with: %v", i, err)
}
if err == nil && test.shouldFailQuorum {
t.Errorf("Test %d: should fail but it passed", i)
}
if err == nil {
if length := int64(len(data[test.offset:])); n != length {
t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
}
}
}
setup.Remove()
}
}
// Benchmarks
func benchmarkErasureEncode(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
setup, err := newErasureTestSetup(data, parity, blockSizeV1)
if err != nil {
b.Fatalf("failed to create test setup: %v", err)
}
defer setup.Remove()
erasure, err := NewErasure(context.Background(), data, parity, blockSizeV1)
if err != nil {
b.Fatalf("failed to create ErasureStorage: %v", err)
}
disks := setup.disks
buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
content := make([]byte, size)
for i := 0; i < dataDown; i++ {
disks[i] = OfflineDisk
}
for i := data; i < data+parityDown; i++ {
disks[i] = OfflineDisk
}
b.ResetTimer()
b.SetBytes(size)
b.ReportAllocs()
for i := 0; i < b.N; i++ {
writers := make([]io.Writer, len(disks))
for i, disk := range disks {
if disk == OfflineDisk {
continue
}
disk.DeleteFile("testbucket", "object")
writers[i] = newBitrotWriter(disk, "testbucket", "object", erasure.ShardFileSize(size), DefaultBitrotAlgorithm, erasure.ShardSize())
}
_, err := erasure.Encode(context.Background(), bytes.NewReader(content), writers, buffer, erasure.dataBlocks+1)
closeBitrotWriters(writers)
if err != nil {
panic(err)
}
}
}
func BenchmarkErasureEncodeQuick(b *testing.B) {
const size = 12 * 1024 * 1024
b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
}
func BenchmarkErasureEncode_4_64KB(b *testing.B) {
const size = 64 * 1024
b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
}
func BenchmarkErasureEncode_8_20MB(b *testing.B) {
const size = 20 * 1024 * 1024
b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 0, size, b) })
b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 1, size, b) })
b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 1, 0, size, b) })
b.Run(" 0000|XXX0 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 3, size, b) })
b.Run(" XXX0|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 3, 0, size, b) })
}
func BenchmarkErasureEncode_12_30MB(b *testing.B) {
const size = 30 * 1024 * 1024
b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 0, size, b) })
b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 1, size, b) })
b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 1, 0, size, b) })
b.Run(" 000000|XXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 5, size, b) })
b.Run(" XXXXX0|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 5, 0, size, b) })
}
func BenchmarkErasureEncode_16_40MB(b *testing.B) {
const size = 40 * 1024 * 1024
b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 0, size, b) })
b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 1, size, b) })
b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 1, 0, size, b) })
b.Run(" 00000000|XXXXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 7, size, b) })
b.Run(" XXXXXXX0|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 7, 0, size, b) })
}