[jira] [Commented] (HBASE-5388) Tune HConnectionManager#getCachedLocation method

["Zhihong Yu (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-5388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207773#comment-13207773 ] 

Zhihong Yu commented on HBASE-5388:
-----------------------------------

Integrated to TRUNK.

Thanks for the patch Ronghai.

Thanks for the review, Lars.

@Ronghai:
Please resolve after committer integrates patch to source repository :-)
                
> Tune HConnectionManager#getCachedLocation method
> ------------------------------------------------
>
>                 Key: HBASE-5388
>                 URL: https://issues.apache.org/jira/browse/HBASE-5388
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.5
>            Reporter: ronghai.ma
>            Assignee: ronghai.ma
>              Labels: patch
>             Fix For: 0.94.0
>
>         Attachments: 5388-v2.txt, 5388-v3.txt, 5388-v4.txt, 5388-v5.txt, 5388-v6.txt, HConnectionManager.java, SoftValueSortedMap.java, SoftValueSortedMap.java
>
>
> About 75% improvement in execution time.
> 1. Add the following method in SoftValueSortedMap:
> {code}
> public synchronized <K, V> Entry<K, V> lowerEntry(K key) {
>   return ((TreeMap) this.internalMap).lowerEntry(key);
> }
> {code}
> 2. Modify getCachedLocation:
> {code} 
> Map.Entry<byte[], HRegionLocation> tEntry = tableLocations.lowerEntry(row);
>   if (tEntry != null) {
>   HRegionLocation possibleRegion = tEntry.getValue();
>   //other code
> }
> {code}

--
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