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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7782) Erasure coding: pread from files in striped layout
Date Fri, 03 Apr 2015 18:17:53 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Zhe Zhang updated HDFS-7782:
    Attachment: HDFS-7782-008.patch

Thanks Jing a lot for the update! {{planReadPortions}} looks much cleaner now. Yes the previous
patches treated start offset in block as that in file. Great catch and fix!

008 patch just fixes a conflict in {{DFSTestUtil}} from HDFS-7839, and adds some documentation.

> Erasure coding: pread from files in striped layout
> --------------------------------------------------
>                 Key: HDFS-7782
>                 URL: https://issues.apache.org/jira/browse/HDFS-7782
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Li Bo
>            Assignee: Zhe Zhang
>         Attachments: HDFS-7782-000.patch, HDFS-7782-001.patch, HDFS-7782-002.patch, HDFS-7782-003.patch,
HDFS-7782-004.patch, HDFS-7782-005.patch, HDFS-7782-006.patch, HDFS-7782-008.patch, HDFS-7782.007.patch
> If client wants to read a file, he is not necessary to know and handle what layout the
file is. This sub task adds logic to DFSInputStream to support reading striping layout files.

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