624 lines
15 KiB
Go
624 lines
15 KiB
Go
|
/**
|
||
|
|
* Unit tests for ReedSolomon Streaming API
|
||
|
|
*
|
||
|
|
* Copyright 2015, Klaus Post
|
||
|
|
*/
|
||
|
|
|
||
|
|
package reedsolomon
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"io"
|
||
|
|
"io/ioutil"
|
||
|
|
"math/rand"
|
||
|
|
"testing"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestStreamEncoding(t *testing.T) {
|
||
|
|
perShard := 10 << 20
|
||
|
|
if testing.Short() {
|
||
|
|
perShard = 50000
|
||
|
|
}
|
||
|
|
r, err := NewStream(10, 3)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
rand.Seed(0)
|
||
|
|
input := randomBytes(10, perShard)
|
||
|
|
data := toBuffers(input)
|
||
|
|
par := emptyBuffers(3)
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(data), toWriters(par))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
// Reset Data
|
||
|
|
data = toBuffers(input)
|
||
|
|
|
||
|
|
all := append(toReaders(data), toReaders(par)...)
|
||
|
|
ok, err := r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("Verification failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(1)), toWriters(emptyBuffers(1)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(10)), toWriters(emptyBuffers(1)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(10)), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrShardNoData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardNoData, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
badShards := emptyBuffers(10)
|
||
|
|
badShards[0] = randomBuffer(123)
|
||
|
|
err = r.Encode(toReaders(badShards), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrShardSize {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardSize, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestStreamEncodingConcurrent(t *testing.T) {
|
||
|
|
perShard := 10 << 20
|
||
|
|
if testing.Short() {
|
||
|
|
perShard = 50000
|
||
|
|
}
|
||
|
|
r, err := NewStreamC(10, 3, true, true)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
rand.Seed(0)
|
||
|
|
input := randomBytes(10, perShard)
|
||
|
|
data := toBuffers(input)
|
||
|
|
par := emptyBuffers(3)
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(data), toWriters(par))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
// Reset Data
|
||
|
|
data = toBuffers(input)
|
||
|
|
|
||
|
|
all := append(toReaders(data), toReaders(par)...)
|
||
|
|
ok, err := r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("Verification failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(1)), toWriters(emptyBuffers(1)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(10)), toWriters(emptyBuffers(1)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Encode(toReaders(emptyBuffers(10)), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrShardNoData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardNoData, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
badShards := emptyBuffers(10)
|
||
|
|
badShards[0] = randomBuffer(123)
|
||
|
|
badShards[1] = randomBuffer(123)
|
||
|
|
err = r.Encode(toReaders(badShards), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrShardSize {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardSize, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func randomBuffer(length int) *bytes.Buffer {
|
||
|
|
b := make([]byte, length)
|
||
|
|
fillRandom(b)
|
||
|
|
return bytes.NewBuffer(b)
|
||
|
|
}
|
||
|
|
|
||
|
|
func randomBytes(n, length int) [][]byte {
|
||
|
|
bufs := make([][]byte, n)
|
||
|
|
for j := range bufs {
|
||
|
|
bufs[j] = make([]byte, length)
|
||
|
|
fillRandom(bufs[j])
|
||
|
|
}
|
||
|
|
return bufs
|
||
|
|
}
|
||
|
|
|
||
|
|
func toBuffers(in [][]byte) []*bytes.Buffer {
|
||
|
|
out := make([]*bytes.Buffer, len(in))
|
||
|
|
for i := range in {
|
||
|
|
out[i] = bytes.NewBuffer(in[i])
|
||
|
|
}
|
||
|
|
return out
|
||
|
|
}
|
||
|
|
|
||
|
|
func toReaders(in []*bytes.Buffer) []io.Reader {
|
||
|
|
out := make([]io.Reader, len(in))
|
||
|
|
for i := range in {
|
||
|
|
out[i] = in[i]
|
||
|
|
}
|
||
|
|
return out
|
||
|
|
}
|
||
|
|
|
||
|
|
func toWriters(in []*bytes.Buffer) []io.Writer {
|
||
|
|
out := make([]io.Writer, len(in))
|
||
|
|
for i := range in {
|
||
|
|
out[i] = in[i]
|
||
|
|
}
|
||
|
|
return out
|
||
|
|
}
|
||
|
|
|
||
|
|
func nilWriters(n int) []io.Writer {
|
||
|
|
out := make([]io.Writer, n)
|
||
|
|
for i := range out {
|
||
|
|
out[i] = nil
|
||
|
|
}
|
||
|
|
return out
|
||
|
|
}
|
||
|
|
|
||
|
|
func emptyBuffers(n int) []*bytes.Buffer {
|
||
|
|
b := make([]*bytes.Buffer, n)
|
||
|
|
for i := range b {
|
||
|
|
b[i] = &bytes.Buffer{}
|
||
|
|
}
|
||
|
|
return b
|
||
|
|
}
|
||
|
|
|
||
|
|
func toBytes(in []*bytes.Buffer) [][]byte {
|
||
|
|
b := make([][]byte, len(in))
|
||
|
|
for i := range in {
|
||
|
|
b[i] = in[i].Bytes()
|
||
|
|
}
|
||
|
|
return b
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestStreamReconstruct(t *testing.T) {
|
||
|
|
perShard := 10 << 20
|
||
|
|
if testing.Short() {
|
||
|
|
perShard = 50000
|
||
|
|
}
|
||
|
|
r, err := NewStream(10, 3)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
rand.Seed(0)
|
||
|
|
shards := randomBytes(10, perShard)
|
||
|
|
parb := emptyBuffers(3)
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(toBuffers(shards)), toWriters(parb))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
parity := toBytes(parb)
|
||
|
|
|
||
|
|
all := append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
fill := make([]io.Writer, 13)
|
||
|
|
|
||
|
|
// Reconstruct with all shards present, all fill nil
|
||
|
|
err = r.Reconstruct(all, fill)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
|
||
|
|
// Reconstruct with 10 shards present, asking for all shards to be reconstructed
|
||
|
|
all[0] = nil
|
||
|
|
fill[0] = emptyBuffers(1)[0]
|
||
|
|
all[7] = nil
|
||
|
|
fill[7] = emptyBuffers(1)[0]
|
||
|
|
all[11] = nil
|
||
|
|
fill[11] = emptyBuffers(1)[0]
|
||
|
|
|
||
|
|
err = r.Reconstruct(all, fill)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
shards[0] = fill[0].(*bytes.Buffer).Bytes()
|
||
|
|
shards[7] = fill[7].(*bytes.Buffer).Bytes()
|
||
|
|
parity[1] = fill[11].(*bytes.Buffer).Bytes()
|
||
|
|
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
|
||
|
|
ok, err := r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("Verification failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
|
||
|
|
// Reconstruct with 10 shards present, asking for just data shards to be reconstructed
|
||
|
|
all[0] = nil
|
||
|
|
fill[0] = emptyBuffers(1)[0]
|
||
|
|
all[7] = nil
|
||
|
|
fill[7] = emptyBuffers(1)[0]
|
||
|
|
all[11] = nil
|
||
|
|
fill[11] = nil
|
||
|
|
|
||
|
|
err = r.Reconstruct(all, fill)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
if fill[11] != nil {
|
||
|
|
t.Fatal("Unexpected parity block reconstructed")
|
||
|
|
}
|
||
|
|
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
|
||
|
|
// Reconstruct with 9 shards present (should fail)
|
||
|
|
all[0] = nil
|
||
|
|
fill[0] = emptyBuffers(1)[0]
|
||
|
|
all[4] = nil
|
||
|
|
fill[4] = emptyBuffers(1)[0]
|
||
|
|
all[7] = nil
|
||
|
|
fill[7] = emptyBuffers(1)[0]
|
||
|
|
all[11] = nil
|
||
|
|
fill[11] = emptyBuffers(1)[0]
|
||
|
|
|
||
|
|
err = r.Reconstruct(all, fill)
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
err = r.Reconstruct(toReaders(emptyBuffers(3)), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Reconstruct(toReaders(emptyBuffers(13)), toWriters(emptyBuffers(3)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
err = r.Reconstruct(toReaders(emptyBuffers(13)), toWriters(emptyBuffers(13)))
|
||
|
|
if err != ErrReconstructMismatch {
|
||
|
|
t.Errorf("expected %v, got %v", ErrReconstructMismatch, err)
|
||
|
|
}
|
||
|
|
err = r.Reconstruct(toReaders(emptyBuffers(13)), nilWriters(13))
|
||
|
|
if err != ErrShardNoData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardNoData, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestStreamVerify(t *testing.T) {
|
||
|
|
perShard := 10 << 20
|
||
|
|
if testing.Short() {
|
||
|
|
perShard = 50000
|
||
|
|
}
|
||
|
|
r, err := NewStream(10, 4)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
shards := randomBytes(10, perShard)
|
||
|
|
parb := emptyBuffers(4)
|
||
|
|
|
||
|
|
err = r.Encode(toReaders(toBuffers(shards)), toWriters(parb))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
parity := toBytes(parb)
|
||
|
|
all := append(toReaders(toBuffers(shards)), toReaders(parb)...)
|
||
|
|
ok, err := r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("Verification failed")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flip bits in a random byte
|
||
|
|
parity[0][len(parity[0])-20000] = parity[0][len(parity[0])-20000] ^ 0xff
|
||
|
|
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
ok, err = r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if ok {
|
||
|
|
t.Fatal("Verification did not fail")
|
||
|
|
}
|
||
|
|
// Re-encode
|
||
|
|
err = r.Encode(toReaders(toBuffers(shards)), toWriters(parb))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
// Fill a data segment with random data
|
||
|
|
shards[0][len(shards[0])-30000] = shards[0][len(shards[0])-30000] ^ 0xff
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(parb)...)
|
||
|
|
ok, err = r.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if ok {
|
||
|
|
t.Fatal("Verification did not fail")
|
||
|
|
}
|
||
|
|
|
||
|
|
_, err = r.Verify(toReaders(emptyBuffers(10)))
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
_, err = r.Verify(toReaders(emptyBuffers(14)))
|
||
|
|
if err != ErrShardNoData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardNoData, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestStreamOneEncode(t *testing.T) {
|
||
|
|
codec, err := NewStream(5, 5)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
shards := [][]byte{
|
||
|
|
{0, 1},
|
||
|
|
{4, 5},
|
||
|
|
{2, 3},
|
||
|
|
{6, 7},
|
||
|
|
{8, 9},
|
||
|
|
}
|
||
|
|
parb := emptyBuffers(5)
|
||
|
|
codec.Encode(toReaders(toBuffers(shards)), toWriters(parb))
|
||
|
|
parity := toBytes(parb)
|
||
|
|
if parity[0][0] != 12 || parity[0][1] != 13 {
|
||
|
|
t.Fatal("shard 5 mismatch")
|
||
|
|
}
|
||
|
|
if parity[1][0] != 10 || parity[1][1] != 11 {
|
||
|
|
t.Fatal("shard 6 mismatch")
|
||
|
|
}
|
||
|
|
if parity[2][0] != 14 || parity[2][1] != 15 {
|
||
|
|
t.Fatal("shard 7 mismatch")
|
||
|
|
}
|
||
|
|
if parity[3][0] != 90 || parity[3][1] != 91 {
|
||
|
|
t.Fatal("shard 8 mismatch")
|
||
|
|
}
|
||
|
|
if parity[4][0] != 94 || parity[4][1] != 95 {
|
||
|
|
t.Fatal("shard 9 mismatch")
|
||
|
|
}
|
||
|
|
|
||
|
|
all := append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
ok, err := codec.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if !ok {
|
||
|
|
t.Fatal("did not verify")
|
||
|
|
}
|
||
|
|
shards[3][0]++
|
||
|
|
all = append(toReaders(toBuffers(shards)), toReaders(toBuffers(parity))...)
|
||
|
|
ok, err = codec.Verify(all)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
if ok {
|
||
|
|
t.Fatal("verify did not fail as expected")
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
func benchmarkStreamEncode(b *testing.B, dataShards, parityShards, shardSize int) {
|
||
|
|
r, err := NewStream(dataShards, parityShards)
|
||
|
|
if err != nil {
|
||
|
|
b.Fatal(err)
|
||
|
|
}
|
||
|
|
shards := make([][]byte, dataShards)
|
||
|
|
for s := range shards {
|
||
|
|
shards[s] = make([]byte, shardSize)
|
||
|
|
}
|
||
|
|
|
||
|
|
rand.Seed(0)
|
||
|
|
for s := 0; s < dataShards; s++ {
|
||
|
|
fillRandom(shards[s])
|
||
|
|
}
|
||
|
|
|
||
|
|
b.SetBytes(int64(shardSize * dataShards))
|
||
|
|
b.ResetTimer()
|
||
|
|
out := make([]io.Writer, parityShards)
|
||
|
|
for i := range out {
|
||
|
|
out[i] = ioutil.Discard
|
||
|
|
}
|
||
|
|
for i := 0; i < b.N; i++ {
|
||
|
|
err = r.Encode(toReaders(toBuffers(shards)), out)
|
||
|
|
if err != nil {
|
||
|
|
b.Fatal(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkStreamEncode10x2x10000(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 10, 2, 10000)
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkStreamEncode100x20x10000(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 100, 20, 10000)
|
||
|
|
}
|
||
|
|
|
||
|
|
func BenchmarkStreamEncode17x3x1M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 17, 3, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data shards and 4 parity shards with 16MB each.
|
||
|
|
func BenchmarkStreamEncode10x4x16M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 10, 4, 16*1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 5 data shards and 2 parity shards with 1MB each.
|
||
|
|
func BenchmarkStreamEncode5x2x1M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 5, 2, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 1 data shards and 2 parity shards with 1MB each.
|
||
|
|
func BenchmarkStreamEncode10x2x1M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 10, 2, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data shards and 4 parity shards with 1MB each.
|
||
|
|
func BenchmarkStreamEncode10x4x1M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 10, 4, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 50 data shards and 20 parity shards with 1MB each.
|
||
|
|
func BenchmarkStreamEncode50x20x1M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 50, 20, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 17 data shards and 3 parity shards with 16MB each.
|
||
|
|
func BenchmarkStreamEncode17x3x16M(b *testing.B) {
|
||
|
|
benchmarkStreamEncode(b, 17, 3, 16*1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
func benchmarkStreamVerify(b *testing.B, dataShards, parityShards, shardSize int) {
|
||
|
|
r, err := NewStream(dataShards, parityShards)
|
||
|
|
if err != nil {
|
||
|
|
b.Fatal(err)
|
||
|
|
}
|
||
|
|
shards := make([][]byte, parityShards+dataShards)
|
||
|
|
for s := range shards {
|
||
|
|
shards[s] = make([]byte, shardSize)
|
||
|
|
}
|
||
|
|
|
||
|
|
rand.Seed(0)
|
||
|
|
for s := 0; s < dataShards; s++ {
|
||
|
|
fillRandom(shards[s])
|
||
|
|
}
|
||
|
|
err = r.Encode(toReaders(toBuffers(shards[:dataShards])), toWriters(toBuffers(shards[dataShards:])))
|
||
|
|
if err != nil {
|
||
|
|
b.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
b.SetBytes(int64(shardSize * dataShards))
|
||
|
|
b.ResetTimer()
|
||
|
|
for i := 0; i < b.N; i++ {
|
||
|
|
_, err = r.Verify(toReaders(toBuffers(shards)))
|
||
|
|
if err != nil {
|
||
|
|
b.Fatal(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data slices with 2 parity slices holding 10000 bytes each
|
||
|
|
func BenchmarkStreamVerify10x2x10000(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 10, 2, 10000)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 50 data slices with 5 parity slices holding 100000 bytes each
|
||
|
|
func BenchmarkStreamVerify50x5x50000(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 50, 5, 100000)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data slices with 2 parity slices holding 1MB bytes each
|
||
|
|
func BenchmarkStreamVerify10x2x1M(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 10, 2, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 5 data slices with 2 parity slices holding 1MB bytes each
|
||
|
|
func BenchmarkStreamVerify5x2x1M(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 5, 2, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data slices with 4 parity slices holding 1MB bytes each
|
||
|
|
func BenchmarkStreamVerify10x4x1M(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 10, 4, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 5 data slices with 2 parity slices holding 1MB bytes each
|
||
|
|
func BenchmarkStreamVerify50x20x1M(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 50, 20, 1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Benchmark 10 data slices with 4 parity slices holding 16MB bytes each
|
||
|
|
func BenchmarkStreamVerify10x4x16M(b *testing.B) {
|
||
|
|
benchmarkStreamVerify(b, 10, 4, 16*1024*1024)
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestStreamSplitJoin(t *testing.T) {
|
||
|
|
var data = make([]byte, 250000)
|
||
|
|
rand.Seed(0)
|
||
|
|
fillRandom(data)
|
||
|
|
|
||
|
|
enc, _ := NewStream(5, 3)
|
||
|
|
split := emptyBuffers(5)
|
||
|
|
err := enc.Split(bytes.NewBuffer(data), toWriters(split), int64(len(data)))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
splits := toBytes(split)
|
||
|
|
expect := len(data) / 5
|
||
|
|
// Beware, if changing data size
|
||
|
|
if split[0].Len() != expect {
|
||
|
|
t.Errorf("unexpected size. expected %d, got %d", expect, split[0].Len())
|
||
|
|
}
|
||
|
|
|
||
|
|
err = enc.Split(bytes.NewBuffer([]byte{}), toWriters(emptyBuffers(3)), 0)
|
||
|
|
if err != ErrShortData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShortData, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
buf := new(bytes.Buffer)
|
||
|
|
err = enc.Join(buf, toReaders(toBuffers(splits)), int64(len(data)))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatal(err)
|
||
|
|
}
|
||
|
|
joined := buf.Bytes()
|
||
|
|
if !bytes.Equal(joined, data) {
|
||
|
|
t.Fatal("recovered data does match original", joined[:8], data[:8], "... lengths:", len(joined), len(data))
|
||
|
|
}
|
||
|
|
|
||
|
|
err = enc.Join(buf, toReaders(emptyBuffers(2)), 0)
|
||
|
|
if err != ErrTooFewShards {
|
||
|
|
t.Errorf("expected %v, got %v", ErrTooFewShards, err)
|
||
|
|
}
|
||
|
|
bufs := toReaders(emptyBuffers(5))
|
||
|
|
bufs[2] = nil
|
||
|
|
err = enc.Join(buf, bufs, 0)
|
||
|
|
if se, ok := err.(StreamReadError); ok {
|
||
|
|
if se.Err != ErrShardNoData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShardNoData, se.Err)
|
||
|
|
}
|
||
|
|
if se.Stream != 2 {
|
||
|
|
t.Errorf("Expected error on stream 2, got %d", se.Stream)
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
t.Errorf("expected error type %T, got %T", StreamReadError{}, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
err = enc.Join(buf, toReaders(toBuffers(splits)), int64(len(data)+1))
|
||
|
|
if err != ErrShortData {
|
||
|
|
t.Errorf("expected %v, got %v", ErrShortData, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestNewStream(t *testing.T) {
|
||
|
|
tests := []struct {
|
||
|
|
data, parity int
|
||
|
|
err error
|
||
|
|
}{
|
||
|
|
{127, 127, nil},
|
||
|
|
{256, 256, ErrMaxShardNum},
|
||
|
|
|
||
|
|
{0, 1, ErrInvShardNum},
|
||
|
|
{1, 0, ErrInvShardNum},
|
||
|
|
{257, 1, ErrMaxShardNum},
|
||
|
|
|
||
|
|
// overflow causes r.Shards to be negative
|
||
|
|
{256, int(^uint(0) >> 1), errInvalidRowSize},
|
||
|
|
}
|
||
|
|
for _, test := range tests {
|
||
|
|
_, err := NewStream(test.data, test.parity)
|
||
|
|
if err != test.err {
|
||
|
|
t.Errorf("New(%v, %v): expected %v, got %v", test.data, test.parity, test.err, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|