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https://issues.apache.org/jira/browse/HDFS-17532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17847833#comment-17847833
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ASF GitHub Bot commented on HDFS-17532:
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kokonguyen191 opened a new pull request, #6839:
URL: https://github.com/apache/hadoop/pull/6839
### Description of PR
This ticket aims to allow the overwrite part and delete part of
org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore#overrideExpiredRecords
to run in parallel.
Sister ticket to HDFS-17529
> Allow router state store cache update to overwrite and delete in parallel
> -------------------------------------------------------------------------
>
> Key: HDFS-17532
> URL: https://issues.apache.org/jira/browse/HDFS-17532
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs, rbf
> Reporter: Felix N
> Assignee: Felix N
> Priority: Minor
>
> Current implementation for router state store update is quite inefficient, so
> much that when routers are removed and a lot of NameNodeMembership records
> are deleted in a short burst, the deletions triggered a router safemode in
> our cluster and caused a lot of troubles.
> This ticket aims to allow the overwrite part and delete part of
> org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore#overrideExpiredRecords
> to run in parallel.
> See HDFS-17529 for the other half of this improvement.
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