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Posted to hdfs-issues@hadoop.apache.org by "Youwei Wang (JIRA)" <ji...@apache.org> on 2016/08/01 03:11:20 UTC
[jira] [Updated] (HDFS-8901) Use ByteBuffer in striping positional
read
[ https://issues.apache.org/jira/browse/HDFS-8901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Youwei Wang updated HDFS-8901:
------------------------------
Attachment: HDFS-8901.v13.patch
New patch submitted.
File name: HDFS-8901.v13.patch
Commit id: 34ccaa8367f048ed9f56038efe7b3202c436b6e6
> 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: Youwei Wang
> Attachments: HDFS-8901-v10.patch, HDFS-8901-v2.patch, HDFS-8901-v3.patch, HDFS-8901-v4.patch, HDFS-8901-v5.patch, HDFS-8901-v6.patch, HDFS-8901-v7.patch, HDFS-8901-v8.patch, HDFS-8901-v9.patch, HDFS-8901.v11.patch, HDFS-8901.v12.patch, HDFS-8901.v13.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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