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54 lines
1.7 KiB
54 lines
1.7 KiB
package erasure_coding
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import (
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"fmt"
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"os"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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"github.com/chrislusf/seaweedfs/weed/storage/types"
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)
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func TestPositioning(t *testing.T) {
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ecxFile, err := os.OpenFile("389.ecx", os.O_RDONLY, 0)
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if err != nil {
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t.Errorf("failed to open ecx file: %v", err)
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}
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defer ecxFile.Close()
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stat, _ := ecxFile.Stat()
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fileSize := stat.Size()
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tests := []struct {
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needleId string
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offset int64
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size int
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}{
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{needleId: "0f0edb92", offset: 31300679656, size: 1167},
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{needleId: "0ef7d7f8", offset: 11513014944, size: 66044},
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}
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for _, test := range tests {
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needleId, _ := types.ParseNeedleId(test.needleId)
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offset, size, err := SearchNeedleFromSortedIndex(ecxFile, fileSize, needleId, nil)
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assert.Equal(t, nil, err, "SearchNeedleFromSortedIndex")
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fmt.Printf("offset: %d size: %d\n", offset.ToAcutalOffset(), size)
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}
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needleId, _ := types.ParseNeedleId("0f087622")
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offset, size, err := SearchNeedleFromSortedIndex(ecxFile, fileSize, needleId, nil)
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assert.Equal(t, nil, err, "SearchNeedleFromSortedIndex")
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fmt.Printf("offset: %d size: %d\n", offset.ToAcutalOffset(), size)
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var shardEcdFileSize int64 = 1118830592 // 1024*1024*1024*3
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intervals := LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, DataShardsCount*shardEcdFileSize, offset.ToAcutalOffset(), uint32(needle.GetActualSize(size, needle.CurrentVersion)))
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for _, interval := range intervals {
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shardId, shardOffset := interval.ToShardIdAndOffset(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize)
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fmt.Printf("interval: %+v, shardId: %d, shardOffset: %d\n", interval, shardId, shardOffset)
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}
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}
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