[ https://issues.apache.org/jira/browse/HDFS-15745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Haibin Huang updated HDFS-15745: -------------------------------- Attachment: HDFS-15745-001.patch Status: Patch Available (was: Open) > Make DataNodePeerMetrics#LOW_THRESHOLD_MS and MIN_OUTLIER_DETECTION_NODES > configurable > -------------------------------------------------------------------------------------- > > Key: HDFS-15745 > URL: https://issues.apache.org/jira/browse/HDFS-15745 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Haibin Huang > Assignee: Haibin Huang > Priority: Major > Attachments: HDFS-15745-001.patch, image-2020-12-22-17-00-50-796.png > > > When i enable DataNodePeerMetrics to find slow slow peer in cluster, i found > there is a lot of slow peer but ReportingNodes's averageDelay is very low, > and these slow peer node are normal. I think the reason of why generating so > many slow peer is that the value of DataNodePeerMetrics#LOW_THRESHOLD_MS is > too small (only 5ms) and it is not configurable. The default value of slow io > warning log threshold is 300ms, i.e. > DFSConfigKeys.DFS_DATANODE_SLOW_IO_WARNING_THRESHOLD_DEFAULT = 300, so > DataNodePeerMetrics#LOW_THRESHOLD_MS should not be less than 300ms, otherwise > namenode will get a lot of invalid slow peer information. > !image-2020-12-22-17-00-50-796.png! -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org