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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