[ https://issues.apache.org/jira/browse/HDFS-10782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16911624#comment-16911624 ]
Wei-Chiu Chuang commented on HDFS-10782: ---------------------------------------- Not familiar with CCM. Could you also provide a patch for trunk? Given this is a memory optimization, no test is needed. > 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 > Assignee: He Xiaoqiao > Priority: Major > 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. -- This message was sent by Atlassian Jira (v8.3.2#803003) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org