Wellington Chevreuil created HBASE-27551:
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Summary: Add config options to delay assignment to retain last
region location
Key: HBASE-27551
URL: https://issues.apache.org/jira/browse/HBASE-27551
Project: HBase
Issue Type: Improvement
Reporter: Wellington Chevreuil
Assignee: Wellington Chevreuil
HBASE-27313 introduced the ability to persist the list of files cached in a
given RS, but temporary RSes loss or restarts would cause regions to be eagerly
reassigned on other RSes, making the persisted cache useless. For some use
cases, such as when using ObjectStores based persistence, performance
degradation caused by cache misses have a worse impact than temporary region
unavailability.
This proposes and additional config property (disabled by default) to forcibly
wait the TRSP for a configurable time while checking for the previous RS
holding region to get back online, before proceeding with the region assignment.
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