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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5388) Tune HConnectionManager#getCachedLocation method
Date Thu, 16 Feb 2012 14:47:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13209412#comment-13209412
] 

Hudson commented on HBASE-5388:
-------------------------------

Integrated in HBase-TRUNK #2663 (See [https://builds.apache.org/job/HBase-TRUNK/2663/])
    HBASE-5388 Tune HConnectionManager#getCachedLocation method (Ronghai Ma) (Revision 1243994)

     Result = FAILURE
tedyu : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/util/SoftValueSortedMap.java

                
> 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}

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