073aac3d92
By monitoring PUT/DELETE and heal operations it is possible to track changed paths and keep a bloom filter for this data. This can help prioritize paths to scan. The bloom filter can identify paths that have not changed, and the few collisions will only result in a marginal extra workload. This can be implemented on either a bucket+(1 prefix level) with reasonable performance. The bloom filter is set to have a false positive rate at 1% at 1M entries. A bloom table of this size is about ~2500 bytes when serialized. To not force a full scan of all paths that have changed cycle bloom filters would need to be kept, so we guarantee that dirty paths have been scanned within cycle runs. Until cycle bloom filters have been collected all paths are considered dirty.
249 lines
12 KiB
Go
249 lines
12 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2016 MinIO, 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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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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*/
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package cmd
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import (
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"bytes"
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"context"
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"crypto/rand"
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"io"
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"testing"
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humanize "github.com/dustin/go-humanize"
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)
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type badDisk struct{ StorageAPI }
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func (a badDisk) String() string {
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return "bad-disk"
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}
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func (a badDisk) AppendFile(volume string, path string, buf []byte) error {
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return errFaultyDisk
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}
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func (a badDisk) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
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return nil, errFaultyDisk
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}
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func (a badDisk) UpdateBloomFilter(ctx context.Context, oldest, current uint64) (*bloomFilterResponse, error) {
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return nil, errFaultyDisk
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}
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func (a badDisk) CreateFile(volume, path string, size int64, reader io.Reader) error {
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return errFaultyDisk
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}
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func (badDisk) Hostname() string {
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return ""
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}
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const oneMiByte = 1 * humanize.MiByte
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var erasureEncodeTests = []struct {
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dataBlocks int
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onDisks, offDisks int
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blocksize, data int64
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offset int
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algorithm BitrotAlgorithm
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shouldFail, shouldFailQuorum bool
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}{
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{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 0
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{dataBlocks: 3, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 1, algorithm: SHA256, shouldFail: false, shouldFailQuorum: false}, // 1
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{dataBlocks: 4, onDisks: 8, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 2
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{dataBlocks: 5, onDisks: 10, offDisks: 3, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 3
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{dataBlocks: 6, onDisks: 12, offDisks: 4, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 4
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{dataBlocks: 7, onDisks: 14, offDisks: 5, blocksize: int64(blockSizeV1), data: 0, offset: 0, shouldFail: false, algorithm: SHA256, shouldFailQuorum: false}, // 5
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{dataBlocks: 8, onDisks: 16, offDisks: 7, blocksize: int64(blockSizeV1), data: 0, offset: 0, shouldFail: false, algorithm: DefaultBitrotAlgorithm, shouldFailQuorum: false}, // 6
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{dataBlocks: 2, onDisks: 4, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: true}, // 7
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{dataBlocks: 4, onDisks: 8, offDisks: 4, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: SHA256, shouldFail: false, shouldFailQuorum: true}, // 8
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{dataBlocks: 7, onDisks: 14, offDisks: 7, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 9
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{dataBlocks: 8, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 10
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{dataBlocks: 5, onDisks: 10, offDisks: 3, blocksize: int64(oneMiByte), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 11
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{dataBlocks: 3, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 12
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{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(oneMiByte / 2), data: oneMiByte, offset: oneMiByte/2 + 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 13
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{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(oneMiByte - 1), data: oneMiByte, offset: oneMiByte - 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false}, // 14
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{dataBlocks: 8, onDisks: 12, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 15
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{dataBlocks: 8, onDisks: 10, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 16
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{dataBlocks: 10, onDisks: 14, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 17, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 17
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{dataBlocks: 2, onDisks: 6, offDisks: 2, blocksize: int64(oneMiByte), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 18
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{dataBlocks: 10, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true}, // 19
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}
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func TestErasureEncode(t *testing.T) {
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for i, test := range erasureEncodeTests {
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setup, err := newErasureTestSetup(test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
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if err != nil {
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t.Fatalf("Test %d: failed to create test setup: %v", i, err)
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}
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disks := setup.disks
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erasure, err := NewErasure(context.Background(), test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
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if err != nil {
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setup.Remove()
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t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
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}
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buffer := make([]byte, test.blocksize, 2*test.blocksize)
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data := make([]byte, test.data)
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if _, err = io.ReadFull(rand.Reader, data); err != nil {
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setup.Remove()
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t.Fatalf("Test %d: failed to generate random test data: %v", i, err)
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}
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writers := make([]io.Writer, len(disks))
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for i, disk := range disks {
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if disk == OfflineDisk {
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continue
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}
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writers[i] = newBitrotWriter(disk, "testbucket", "object", erasure.ShardFileSize(int64(len(data[test.offset:]))), test.algorithm, erasure.ShardSize())
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}
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n, err := erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
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closeBitrotWriters(writers)
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if err != nil && !test.shouldFail {
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t.Errorf("Test %d: should pass but failed with: %v", i, err)
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}
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if err == nil && test.shouldFail {
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t.Errorf("Test %d: should fail but it passed", i)
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}
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for i, w := range writers {
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if w == nil {
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disks[i] = OfflineDisk
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}
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}
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if err == nil {
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if length := int64(len(data[test.offset:])); n != length {
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t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
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}
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writers := make([]io.Writer, len(disks))
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for i, disk := range disks {
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if disk == nil {
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continue
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}
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writers[i] = newBitrotWriter(disk, "testbucket", "object2", erasure.ShardFileSize(int64(len(data[test.offset:]))), test.algorithm, erasure.ShardSize())
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}
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for j := range disks[:test.offDisks] {
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switch w := writers[j].(type) {
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case *wholeBitrotWriter:
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w.disk = badDisk{nil}
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case *streamingBitrotWriter:
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w.iow.CloseWithError(errFaultyDisk)
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}
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}
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if test.offDisks > 0 {
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writers[0] = nil
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}
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n, err = erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
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closeBitrotWriters(writers)
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if err != nil && !test.shouldFailQuorum {
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t.Errorf("Test %d: should pass but failed with: %v", i, err)
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}
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if err == nil && test.shouldFailQuorum {
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t.Errorf("Test %d: should fail but it passed", i)
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}
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if err == nil {
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if length := int64(len(data[test.offset:])); n != length {
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t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
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}
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}
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}
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setup.Remove()
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}
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}
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// Benchmarks
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func benchmarkErasureEncode(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
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setup, err := newErasureTestSetup(data, parity, blockSizeV1)
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if err != nil {
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b.Fatalf("failed to create test setup: %v", err)
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}
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defer setup.Remove()
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erasure, err := NewErasure(context.Background(), data, parity, blockSizeV1)
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if err != nil {
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b.Fatalf("failed to create ErasureStorage: %v", err)
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}
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disks := setup.disks
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buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
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content := make([]byte, size)
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for i := 0; i < dataDown; i++ {
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disks[i] = OfflineDisk
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}
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for i := data; i < data+parityDown; i++ {
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disks[i] = OfflineDisk
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}
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b.ResetTimer()
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b.SetBytes(size)
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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writers := make([]io.Writer, len(disks))
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for i, disk := range disks {
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if disk == OfflineDisk {
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continue
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}
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disk.DeleteFile("testbucket", "object")
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writers[i] = newBitrotWriter(disk, "testbucket", "object", erasure.ShardFileSize(size), DefaultBitrotAlgorithm, erasure.ShardSize())
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}
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_, err := erasure.Encode(context.Background(), bytes.NewReader(content), writers, buffer, erasure.dataBlocks+1)
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closeBitrotWriters(writers)
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if err != nil {
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panic(err)
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}
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}
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}
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func BenchmarkErasureEncodeQuick(b *testing.B) {
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const size = 12 * 1024 * 1024
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b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
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b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
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b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
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}
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func BenchmarkErasureEncode_4_64KB(b *testing.B) {
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const size = 64 * 1024
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b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
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b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
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b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
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}
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func BenchmarkErasureEncode_8_20MB(b *testing.B) {
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const size = 20 * 1024 * 1024
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b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 0, size, b) })
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b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 1, size, b) })
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b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 1, 0, size, b) })
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b.Run(" 0000|XXX0 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 3, size, b) })
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b.Run(" XXX0|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 3, 0, size, b) })
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}
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func BenchmarkErasureEncode_12_30MB(b *testing.B) {
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const size = 30 * 1024 * 1024
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b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 0, size, b) })
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b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 1, size, b) })
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b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 1, 0, size, b) })
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b.Run(" 000000|XXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 5, size, b) })
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b.Run(" XXXXX0|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 5, 0, size, b) })
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}
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func BenchmarkErasureEncode_16_40MB(b *testing.B) {
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const size = 40 * 1024 * 1024
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b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 0, size, b) })
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b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 1, size, b) })
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b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 1, 0, size, b) })
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b.Run(" 00000000|XXXXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 7, size, b) })
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b.Run(" XXXXXXX0|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 7, 0, size, b) })
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}
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