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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8328) Follow-on to update decode for DataNode striped blocks reconstruction
Date Tue, 02 Jun 2015 21:43:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14569817#comment-14569817
] 

Zhe Zhang commented on HDFS-8328:
---------------------------------

bq. paddingBufferToLen(..) for multiple zeroStripeBuffers[] is wasting time. One zeroStripeBuffer
is enough.
Good thought Walter. But as Kai mentioned on another JIRA, the input buffers could be altered
in the decode method. Maybe we should do this zero copy update after the HADOOP side changes
to keep input buffers unchanged.

> Follow-on to update decode for DataNode striped blocks reconstruction
> ---------------------------------------------------------------------
>
>                 Key: HDFS-8328
>                 URL: https://issues.apache.org/jira/browse/HDFS-8328
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Yi Liu
>            Assignee: Yi Liu
>         Attachments: HDFS-8328-HDFS-7285.001.patch, HDFS-8328-HDFS-7285.002.patch
>
>
> Current the decode for DataNode striped blocks reconstruction is a workaround, we need
to update it after the decode fix in HADOOP-11847.



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