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Posted to hdfs-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2016/08/24 11:39:22 UTC
[jira] [Commented] (HDFS-10782) Decrease memory frequent exchange
of Centralized Cache Management when run balancer
[ https://issues.apache.org/jira/browse/HDFS-10782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434756#comment-15434756 ]
Hadoop QA commented on HDFS-10782:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 10s{color} | {color:red} HDFS-10782 does not apply to branch-2. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12825240/HDFS-10782-branch-2.001.patch |
| JIRA Issue | HDFS-10782 |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/16524/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org |
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> Decrease memory frequent exchange of Centralized Cache Management when run balancer
> -----------------------------------------------------------------------------------
>
> Key: HDFS-10782
> URL: https://issues.apache.org/jira/browse/HDFS-10782
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover, caching
> Affects Versions: 2.7.1
> Reporter: He Xiaoqiao
> Labels: patch
> Attachments: HDFS-10782-branch-2.001.patch
>
>
> CachedBlocks currently are transparent for Balancer when active feature of centralized cache management. This makes DataNode exchange memory frequently, because Balancer does not Distinguish CachedBlock from blocks, so it may trigger mount of cached/uncached ops.
> I think namenode should avoid return CacheBlocks as much as possible when Balanacer#getblocks.
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