[ https://issues.apache.org/jira/browse/HDFS-17515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDFS-17515: ---------------------------------- Labels: pull-request-available (was: ) > Erasure Coding: ErasureCodingWork is not effectively limited during a block > reconstruction cycle. > ------------------------------------------------------------------------------------------------- > > Key: HDFS-17515 > URL: https://issues.apache.org/jira/browse/HDFS-17515 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Chenyu Zheng > Assignee: Chenyu Zheng > Priority: Major > Labels: pull-request-available > > In a block reconstruction cycle, ErasureCodingWork is not effectively > limited. I add some debug log, log when ecBlocksToBeReplicated is an integer > multiple of 100. > {code:java} > 2024-05-09 10:46:06,986 DEBUG > org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManagerZCY: > ecBlocksToBeReplicated for IP:PORT already have 100 blocks > 2024-05-09 10:46:06,987 DEBUG > org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManagerZCY: > ecBlocksToBeReplicated for IP:PORT already have 200 blocks > ... > 2024-05-09 10:46:06,992 DEBUG > org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManagerZCY: > ecBlocksToBeReplicated for IP:PORT already have 2000 blocks > 2024-05-09 10:46:06,992 DEBUG > org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManagerZCY: > ecBlocksToBeReplicated for IP:PORT already have 2100 blocks {code} > During a block reconstruction cycle, ecBlocksToBeReplicated increases from 0 > to 2100, This is much larger than replicationStreamsHardLimit. This brings > unfairness and leads to a greater tendency to copy EC blocks. > In fact, for non ec block, this is not a problem. > pendingReplicationWithoutTargets increase when schedule work. When > pendingReplicationWithoutTargets is too big, will not schedule work for this > node. > -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org