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adds VolumeEcGenerateSlices, VolumeEcCopy

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This commit is contained in:
Chris Lu
2019-05-20 00:53:17 -07:00
parent ae499fd5aa
commit fbbc74abb4
6 changed files with 508 additions and 236 deletions
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106
weed/storage/erasure_coding/ec_test.go
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@@ -7,7 +7,6 @@ import (
"os"
"testing"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"github.com/klauspost/reedsolomon"
@@ -27,98 +26,20 @@ func TestEncodingDecoding(t *testing.T) {
t.Logf("generateEcFiles: %v", err)
}
err = writeSortedEcxFiles(baseFileName)
err = WriteSortedEcxFile(baseFileName)
if err != nil {
t.Logf("writeSortedEcxFiles: %v", err)
t.Logf("WriteSortedEcxFile: %v", err)
}
err = validateFiles(baseFileName)
if err != nil {
t.Logf("writeSortedEcxFiles: %v", err)
t.Logf("WriteSortedEcxFile: %v", err)
}
removeGeneratedFiles(baseFileName)
}
func generateEcFiles(baseFileName string, bufferSize int, largeBlockSize int64, smallBlockSize int64) error {
file, err := os.OpenFile(baseFileName+".dat", os.O_RDONLY, 0)
if err != nil {
return fmt.Errorf("failed to open dat file: %v", err)
}
defer file.Close()
fi, err := file.Stat()
if err != nil {
return fmt.Errorf("failed to stat dat file: %v", err)
}
err = encodeDatFile(fi.Size(), err, baseFileName, bufferSize, largeBlockSize, file, smallBlockSize)
if err != nil {
return fmt.Errorf("encodeDatFile: %v", err)
}
return nil
}
func encodeDatFile(remainingSize int64, err error, baseFileName string, bufferSize int, largeBlockSize int64, file *os.File, smallBlockSize int64) error {
var processedSize int64
enc, err := reedsolomon.New(DataShardsCount, ParityShardsCount)
if err != nil {
return fmt.Errorf("failed to create encoder: %v", err)
}
buffers := make([][]byte, DataShardsCount+ParityShardsCount)
outputs, err := openEcFiles(baseFileName, false)
defer closeEcFiles(outputs)
if err != nil {
return fmt.Errorf("failed to open dat file: %v", err)
}
for i, _ := range buffers {
buffers[i] = make([]byte, bufferSize)
}
for remainingSize > largeBlockSize*DataShardsCount {
err = encodeData(file, enc, processedSize, largeBlockSize, buffers, outputs)
if err != nil {
return fmt.Errorf("failed to encode large chunk data: %v", err)
}
remainingSize -= largeBlockSize * DataShardsCount
processedSize += largeBlockSize * DataShardsCount
}
for remainingSize > 0 {
encodeData(file, enc, processedSize, smallBlockSize, buffers, outputs)
if err != nil {
return fmt.Errorf("failed to encode small chunk data: %v", err)
}
remainingSize -= smallBlockSize * DataShardsCount
processedSize += smallBlockSize * DataShardsCount
}
return nil
}
func writeSortedEcxFiles(baseFileName string) (e error) {
cm, err := readCompactMap(baseFileName)
if err != nil {
return fmt.Errorf("readCompactMap: %v", err)
}
ecxFile, err := os.OpenFile(baseFileName+".ecx", os.O_TRUNC|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return fmt.Errorf("failed to open dat file: %v", err)
}
defer ecxFile.Close()
err = cm.AscendingVisit(func(value needle_map.NeedleValue) error {
bytes := value.ToBytes()
_, writeErr := ecxFile.Write(bytes)
return writeErr
})
if err != nil {
return fmt.Errorf("failed to open dat file: %v", err)
}
return nil
}
func validateFiles(baseFileName string) error {
cm, err := readCompactMap(baseFileName)
if err != nil {
@@ -148,25 +69,6 @@ func validateFiles(baseFileName string) error {
return nil
}
func readCompactMap(baseFileName string) (*needle_map.CompactMap, error) {
indexFile, err := os.OpenFile(baseFileName+".idx", os.O_RDONLY, 0644)
if err != nil {
return nil, fmt.Errorf("cannot read Volume Index %s.idx: %v", baseFileName, err)
}
defer indexFile.Close()
cm := needle_map.NewCompactMap()
err = storage.WalkIndexFile(indexFile, func(key types.NeedleId, offset types.Offset, size uint32) error {
if !offset.IsZero() && size != types.TombstoneFileSize {
cm.Set(key, offset, size)
} else {
cm.Delete(key)
}
return nil
})
return cm, err
}
func assertSame(datFile *os.File, datSize int64, ecFiles []*os.File, offset types.Offset, size uint32) error {
data, err := readDatFile(datFile, offset, size)
@@ -288,7 +190,7 @@ func removeGeneratedFiles(baseFileName string) {
fname := fmt.Sprintf("%s.ec%02d", baseFileName, i+1)
os.Remove(fname)
}
os.Remove(baseFileName+".ecx")
os.Remove(baseFileName + ".ecx")
}
func TestLocateData(t *testing.T) {