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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10460) Erasure Coding: Recompute block checksum for a particular range less than file size on the fly by reconstructing missed block
Date Thu, 23 Jun 2016 09:45:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kai Zheng updated HDFS-10460:
-----------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 3.0.0-alpha1
           Status: Resolved  (was: Patch Available)

The latest patch LGTM and +1. Committed to trunk. Thanks [~rakeshr] for the hard taking and
contribution!

> Erasure Coding: Recompute block checksum for a particular range less than file size on
the fly by reconstructing missed block
> -----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-10460
>                 URL: https://issues.apache.org/jira/browse/HDFS-10460
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>             Fix For: 3.0.0-alpha1
>
>         Attachments: HDFS-10460-00.patch, HDFS-10460-01.patch, HDFS-10460-02.patch, HDFS-10460-03.patch,
HDFS-10460-04.patch, HDFS-10460-05.patch
>
>
> This jira is HDFS-9833 follow-on task to address reconstructing block and then recalculating
block checksum for a particular range query.
> For example,
> {code}
> // create a file 'stripedFile1' with fileSize = cellSize * numDataBlocks = 65536 * 6
= 393216
> FileChecksum stripedFileChecksum = getFileChecksum(stripedFile1, 10, true);
> {code}



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