Large number of regions slows down start and stop of HBase clusters
-------------------------------------------------------------------
Key: HBASE-1442
URL: https://issues.apache.org/jira/browse/HBASE-1442
Project: Hadoop HBase
Issue Type: Improvement
Reporter: Lars George
A cluster with tables that have thousands of regions will take a long time to
start and shut down.
During the start the META table is scanned which takes a long time. Also at
least minor compaction are performed that add to the delay as by default there
is a 20sec wait time between the each compaction.
Also region assignment may be not right assigning 10 regions at a time while
unbalancing the servers.
Shutting a large cluster down also takes a long time before everything is
persisted and shut down orderly. Times in excess of 10 minutes have been noted.
It needs to be investigated where this time is spent.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
