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https://issues.apache.org/jira/browse/HBASE-5664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13561294#comment-13561294
]
Hudson commented on HBASE-5664:
-------------------------------
Integrated in HBase-TRUNK #3786 (See
[https://builds.apache.org/job/HBase-TRUNK/3786/])
HBASE-5664 CP hooks in Scan flow for fast forward when filter filters out a
row (Anoop) (Revision 1437790)
Result = FAILURE
tedyu :
Files :
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseRegionObserver.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
> CP hooks in Scan flow for fast forward when filter filters out a row
> --------------------------------------------------------------------
>
> Key: HBASE-5664
> URL: https://issues.apache.org/jira/browse/HBASE-5664
> Project: HBase
> Issue Type: Improvement
> Components: Coprocessors, Filters
> Affects Versions: 0.92.1
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 0.96.0, 0.94.5
>
> Attachments: HBASE-5664_94.patch, HBASE-5664_94_V2.patch,
> HBASE-5664_Trunk.patch, HBASE-5664_Trunk_V2.patch
>
>
> In HRegion.nextInternal(int limit, String metric)
> We have while(true) loop so as to fetch a next result which satisfies
> filter condition. When Filter filters out the current fetched row we call
> nextRow(byte [] currentRow) before going with the next row.
> {code}
> if (results.isEmpty() || filterRow()) {
> // this seems like a redundant step - we already consumed the row
> // there're no left overs.
> // the reasons for calling this method are:
> // 1. reset the filters.
> // 2. provide a hook to fast forward the row (used by subclasses)
> nextRow(currentRow);
> {code}
> // 2. provide a hook to fast forward the row (used by subclasses)
> We can provide same feature of fast forward support for the CP also.
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