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From "ronghai.ma (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5388) tunning getCachedLocation method
Date Sun, 12 Feb 2012 14:12:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13206422#comment-13206422
] 

ronghai.ma commented on HBASE-5388:
-----------------------------------

My pleasure, and two questions:
1. the svn location
2. my account

Yes, measeured in excution time.
                
> tunning getCachedLocation method
> --------------------------------
>
>                 Key: HBASE-5388
>                 URL: https://issues.apache.org/jira/browse/HBASE-5388
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: ronghai.ma
>
> About 75% improvement。
> 1. Add a method in SoftValueSortedMap
> public synchronized <K, V> Entry<K, V> lowerEntry(K key) {
>   return ((TreeMap) this.internalMap).lowerEntry(key);
> }
> 2. Modify getCachedLocation 
> Map.Entry<byte[], HRegionLocation> tEntry = tableLocations.lowerEntry(row);
>   if (tEntry != null) {
>   HRegionLocation possibleRegion = tEntry.getValue();
>   //other code
> }

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