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From "Yi Liu (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-8902) Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder in striping read (position and stateful)
Date Mon, 17 Aug 2015 14:16:45 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14699579#comment-14699579
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Yi Liu edited comment on HDFS-8902 at 8/17/15 2:15 PM:
-------------------------------------------------------

Kai, HDFS-8668 will handle the java bytebuffer and direct buffer for all EC related encoding/decoding,
so I think several new JIRAs related to this you just created are duplicated. 
If you want, you can take that JIRA, but I think we can handle them all in one JIRA, no need
to create separate JIRAs.


was (Author: hitliuyi):
Kai, HDFS-8668 will handle the java bytebuffer and direct buffer for all EC related encoding/decoding,
so I think several new JIRAs you just created are duplicated. 
If you want, you can take that JIRA, but I think we can handle them all in one JIRA, no need
to create separate JIRAs.

> Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder in striping
read (position and stateful)
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8902
>                 URL: https://issues.apache.org/jira/browse/HDFS-8902
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>
> We would choose ByteBuffer on heap or direct ByteBuffer according to used erasure coder
in striping read (position and stateful), for performance consideration. Pure Java implemented
coder favors on heap one, though native coder likes more direct one, avoiding data copy.



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