MyFavMirrors/minio
1
0
Fork 0
mirror of https://github.com/minio/minio.git synced 2025-11-09 05:34:56 -05:00
Code Issues Packages Projects Releases Wiki Activity

Add new ReadFileWithVerify storage-layer API (#4349)

Browse Source 
This is an enhancement to the XL/distributed-XL mode. FS mode is
unaffected.

The ReadFileWithVerify storage-layer call is similar to ReadFile with
the additional functionality of performing bit-rot checking. It
accepts additional parameters for a hashing algorithm to use and the
expected hex-encoded hash string.

This patch provides significant performance improvement because:

1. combines the step of reading the file (during
erasure-decoding/reconstruction) with bit-rot verification;

2. limits the number of file-reads; and

3. avoids transferring the file over the network for bit-rot
verification.

ReadFile API is implemented as ReadFileWithVerify with empty hashing
arguments.

Credits to AB and Harsha for the algorithmic improvement.

Fixes #4236.
This commit is contained in:
Aditya Manthramurthy
2017-05-16 14:21:52 -07:00
committed by Harshavardhana
parent cae4683971
commit 8975da4e84
20 changed files with 471 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
cmd/erasure-healfile.go
View File

@@ -19,7 +19,9 @@ package cmd
import "encoding/hex"
// Heals the erasure coded file. reedsolomon.Reconstruct() is used to reconstruct the missing parts.
func erasureHealFile(latestDisks []StorageAPI, outDatedDisks []StorageAPI, volume, path, healBucket, healPath string, size int64, blockSize int64, dataBlocks int, parityBlocks int, algo string) (checkSums []string, err error) {
func erasureHealFile(latestDisks []StorageAPI, outDatedDisks []StorageAPI, volume, path, healBucket, healPath string,
size, blockSize int64, dataBlocks, parityBlocks int, algo HashAlgo) (checkSums []string, err error) {
var offset int64
remainingSize := size