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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11798) Native raw erasure coder in XOR codes
Date Fri, 22 May 2015 10:02:17 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kai Zheng updated HADOOP-11798:
-------------------------------
    Attachment: HADOOP-11798-v1.patch

Uploaded the patch. Pending on HADOOP-11887 and HADOOP-11996. 

> Native raw erasure coder in XOR codes
> -------------------------------------
>
>                 Key: HADOOP-11798
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11798
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: io
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>             Fix For: HDFS-7285
>
>         Attachments: HADOOP-11798-v1.patch
>
>
> Raw XOR coder is utilized in Reed-Solomon erasure coder in an optimization to recover
only one erased block which is in most often case. It can also be used in HitchHiker coder.
Therefore a native implementation of it would be deserved for performance gain.



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