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kla.go

+package main
+
+import (
+	"fmt"
+
+	"github.com/klauspost/reedsolomon"
+)
+
+func main() {
+	// To create an encoder with 10 data shards (where your data goes) and 3 parity shards (calculated)
+	enc, err := reedsolomon.New(10, 3)
+	if err != nil {
+		panic(err)
+	}
+
+	// Data
+	data := make([][]byte, 13)
+	// Create all shards, size them at 50000 each
+	for i := range data {
+		data[i] = make([]byte, 256*1024)
+	}
+
+	// Fill some data into the data shards
+	for i, in := range data[:10] {
+		for j := range in {
+			in[j] = byte((i + j) & 0xff)
+		}
+	}
+
+	// Encode
+	err = enc.Encode(data)
+	if err != nil {
+		panic(err)
+	}
+
+	//v1
+	ok, err := enc.Verify(data)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ok)
+
+	// Delete two data shards
+	data[3] = nil
+	data[7] = nil
+	//data[8] = nil
+	data[11] = nil
+
+	//v2
+	ok, err = enc.Verify(data)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(ok)
+
+	// Reconstruct the missing shards
+	err = enc.Reconstruct(data)
+	if err != nil {
+		panic(err)
+	}
+
+	//v3
+	ok, err = enc.Verify(data)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(ok)
+}