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https://issues.apache.org/jira/browse/HDFS-14952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajesh Balamohan updated HDFS-14952:
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Labels: performance (was: )
> Skip safemode if blockSafe is 0 in new NN
> -----------------------------------------
>
> Key: HDFS-14952
> URL: https://issues.apache.org/jira/browse/HDFS-14952
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Rajesh Balamohan
> Priority: Trivial
> Labels: performance
>
> When new NN is installed, it spends 30-45 seconds in Safemode. When
> {{blockTotal}} is 0, it should be possible to short circuit safemode check in
> {{BlockManagerSafeMode::areThresholdsMet}}.
> https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerSafeMode.java#L571
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