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41 lines
774 B
Go
41 lines
774 B
Go
package erasure_coding
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import (
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"io"
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"os"
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"github.com/klauspost/reedsolomon"
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)
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const (
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DataShardsCount = 10
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ParityShardsCount = 4
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ErasureCodingLargeBlockSize = 1024 * 1024 * 1024 // 1GB
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ErasureCodingSmallBlockSize = 1024 * 1024 // 1MB
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)
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func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte) error {
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// read data into buffers
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for i := 0; i < DataShardsCount; i++ {
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n, err := file.ReadAt(buffers[i], startOffset+blockSize*int64(i))
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if err != nil {
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if err != io.EOF {
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return err
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}
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}
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if n < len(buffers[i]) {
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for t := len(buffers[i]) - 1; t >= n; t-- {
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buffers[i][t] = 0
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}
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}
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}
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err := enc.Encode(buffers)
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if err != nil {
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return err
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}
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return nil
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}
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