mirror of https://github.com/minio/minio.git
56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2016 Minio, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package main
|
|
|
|
import "github.com/klauspost/reedsolomon"
|
|
|
|
// erasure storage layer.
|
|
type erasure struct {
|
|
ReedSolomon reedsolomon.Encoder // Erasure encoder/decoder.
|
|
DataBlocks int
|
|
ParityBlocks int
|
|
storageDisks []StorageAPI
|
|
distribution []int
|
|
}
|
|
|
|
// newErasure instantiate a new erasure.
|
|
func newErasure(disks []StorageAPI, distribution []int) *erasure {
|
|
// Initialize E.
|
|
e := &erasure{}
|
|
|
|
// Calculate data and parity blocks.
|
|
dataBlocks, parityBlocks := len(disks)/2, len(disks)/2
|
|
|
|
// Initialize reed solomon encoding.
|
|
rs, err := reedsolomon.New(dataBlocks, parityBlocks)
|
|
fatalIf(err, "Unable to initialize reedsolomon package.")
|
|
|
|
// Save the reedsolomon.
|
|
e.DataBlocks = dataBlocks
|
|
e.ParityBlocks = parityBlocks
|
|
e.ReedSolomon = rs
|
|
|
|
// Save all the initialized storage disks.
|
|
e.storageDisks = disks
|
|
|
|
// Save the distribution.
|
|
e.distribution = distribution
|
|
|
|
// Return successfully initialized.
|
|
return e
|
|
}
|