[ https://issues.apache.org/jira/browse/HDFS-14728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
xuzq updated HDFS-14728: ------------------------ Assignee: xuzq Attachment: HDFS-14728-trunk-001.patch Status: Patch Available (was: Open) > RBF:GetDatanodeReport causes a large GC pressure on the NameNodes > ----------------------------------------------------------------- > > Key: HDFS-14728 > URL: https://issues.apache.org/jira/browse/HDFS-14728 > Project: Hadoop HDFS > Issue Type: Improvement > Components: rbf > Reporter: xuzq > Assignee: xuzq > Priority: Major > Attachments: HDFS-14728-trunk-001.patch > > > When a cluster contains millions of DNs, *GetDatanodeReport* is pretty > expensive, and it will cause a large GC pressure on NameNode. > When multiple NSs share the millions DNs by federation and the router listens > to the NSs, the problem will be more serious. > All the NSs will be GC at the same time. > RBF should cache the datanode report informations and have an option to > disable the cache. -- This message was sent by Atlassian JIRA (v7.6.14#76016) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org