HA: small optimization building incremental block report
--------------------------------------------------------
Key: HDFS-2972
URL: https://issues.apache.org/jira/browse/HDFS-2972
Project: Hadoop HDFS
Issue Type: Sub-task
Components: data-node, ha
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
Current the incremental block report is a List. However, we only really need to
send the most recent information for each block. So, if a block becomes RBW and
is then becomes FINALIZED before the next incremental block report, we should
just report the FINALIZED replica. It's an easy change to just switch to a map
by blockid.
This is on the HA branch since HA changes the code to send RBWs in the
incremental reports, hence it's more important for maintaining performance
parity with trunk.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
