HA: Optimize quota tracking for HA ---------------------------------- Key: HDFS-2989 URL: https://issues.apache.org/jira/browse/HDFS-2989 Project: Hadoop HDFS Issue Type: Sub-task Components: ha, name-node Affects Versions: HA branch (HDFS-1623) Reporter: Todd Lipcon Priority: Minor
Currently after each segment we read in on the standby, we re-calculate all of the quota/usage information throughout the directory tree. This is inefficient. There are two potential optimizations: (a) we could maintain the quotas incrementally as edits are read, or (b) we could defer all quota computation until the node transitions to active mode. (b) is probably less bug-prone. This is not a crucial optimization since in the worst case it might just delay failover by a few extra seconds (the time to traverse the in-memory FSDirectory) -- 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