Felix N created HDFS-17532:
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Summary: 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
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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