[ https://issues.apache.org/jira/browse/HDFS-14728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
xuzq updated HDFS-14728: ------------------------ Attachment: HDFS-14728-trunk-009.patch > 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, HDFS-14728-trunk-002.patch, > HDFS-14728-trunk-003.patch, HDFS-14728-trunk-004.patch, > HDFS-14728-trunk-005.patch, HDFS-14728-trunk-006.patch, > HDFS-14728-trunk-007.patch, HDFS-14728-trunk-008.patch, > HDFS-14728-trunk-009.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 (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