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https://issues.apache.org/jira/browse/HBASE-14611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15069591#comment-15069591
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linbao111 commented on HBASE-14611:
-----------------------------------
more to be added,i think hbase.master.balancer.regionLocationCacheTime default
value after patch did a serious impact on hdfs
namenode(hdfs-audit.log become huge,and full of hmaster accessing)
so if any one update to hbase 0.98.16.1,rememer to add
hbase.master.balancer.regionLocationCacheTime to be 30*2*60 in hbase-site.xml,
> Backport HBASE-14473 (Compute region locality in parallel) to 0.98
> ------------------------------------------------------------------
>
> Key: HBASE-14611
> URL: https://issues.apache.org/jira/browse/HBASE-14611
> Project: HBase
> Issue Type: Task
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.98.16
>
> Attachments: HBASE-14611-0.98.patch
>
>
> [~eclark] contributed a nice change on HBASE-14473 that scales calculation of
> locality balance cost to larger clusters. I'd like to bring this back to 0.98
> for folks running it on larger clusters. The changes require a partial
> rewrite of RegionLocationFinder hence a backport issue.
> The difference between this backport and RegionLocationFinder on later
> branches is we preserve the ability to change the expiration time of cache
> items with the configuration parameter
> "hbase.master.balancer.regionLocationCacheTime".
> The difference between RegionLocationFinder in 0.98 before and after this
> change is the expiration time of cache entries will be set according to when
> they are written into the cache instead of from when they are last accessed,
> which seems better to me.
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