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https://issues.apache.org/jira/browse/HBASE-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13118632#comment-13118632
]
Hudson commented on HBASE-2794:
-------------------------------
Integrated in HBase-TRUNK #2274 (See
[https://builds.apache.org/job/HBase-TRUNK/2274/])
HBASE-2794 Utilize ROWCOL bloom filter if multiple columns within same
family
are requested in a Get (Mikhail Bautin)
tedyu :
Files :
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/KeyValue.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/AbstractHFileReader.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractKeyValueScanner.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueScanner.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
*
/hbase/trunk/src/main/java/org/apache/hadoop/hbase/util/CollectionBackedScanner.java
*
/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestKeyValueHeap.java
*
/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestMultiColumnScanner.java
*
/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanWithBloomError.java
> Utilize ROWCOL bloom filter if multiple columns within same family are
> requested in a Get
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-2794
> URL: https://issues.apache.org/jira/browse/HBASE-2794
> Project: HBase
> Issue Type: Improvement
> Components: performance
> Reporter: Kannan Muthukkaruppan
> Assignee: Mikhail Bautin
> Fix For: 0.92.0
>
>
> Noticed the following snippet in StoreFile.java:Scanner:shouldSeek():
> {code}
> switch(bloomFilterType) {
> case ROW:
> key = row;
> break;
> case ROWCOL:
> if (columns.size() == 1) {
> byte[] col = columns.first();
> key = Bytes.add(row, col);
> break;
> }
> //$FALL-THROUGH$
> default:
> return true;
> }
> {code}
> If columns.size > 1, then we currently don't take advantage of the bloom
> filter. We should optimize this to check bloom for each of columns and if
> none of the columns are present in the bloom avoid opening the file.
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