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Posted to hdfs-dev@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2012/10/18 21:32:08 UTC
[jira] [Created] (HDFS-4075) Reduce recommissioning overhead
Kihwal Lee created HDFS-4075:
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Summary: Reduce recommissioning overhead
Key: HDFS-4075
URL: https://issues.apache.org/jira/browse/HDFS-4075
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 2.0.2-alpha, 0.23.4
Reporter: Kihwal Lee
Assignee: Kihwal Lee
Priority: Critical
When datanodes are recommissioned, {BlockManager#processOverReplicatedBlocksOnReCommission()} is called for each rejoined node and excess blocks are added to the invalidate list. The problem is this is done while the namesystem write lock is held.
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