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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8901) Use ByteBuffer in striping positional read
Date Fri, 08 Apr 2016 00:45:25 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kai Zheng updated HDFS-8901:
----------------------------
    Attachment: HDFS-8901-v7.patch

Fixed a forever loop bug in the patch that causes the many failures, and the reported check
styles. Also rebased.

> Use ByteBuffer in striping positional read
> ------------------------------------------
>
>                 Key: HDFS-8901
>                 URL: https://issues.apache.org/jira/browse/HDFS-8901
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>         Attachments: HDFS-8901-v2.patch, HDFS-8901-v3.patch, HDFS-8901-v4.patch, HDFS-8901-v5.patch,
HDFS-8901-v6.patch, HDFS-8901-v7.patch, initial-poc.patch
>
>
> Native erasure coder prefers to direct ByteBuffer for performance consideration. To prepare
for it, this change uses ByteBuffer through the codes in implementing striping position read.
It will also fix avoiding unnecessary data copying between striping read chunk buffers and
decode input buffers.



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