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Date: Sun, 5 Aug 2012 00:53:12 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-6427) Pluggable compaction and scan
 policies via coprocessors
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    [ https://issues.apache.org/jira/browse/HBASE-6427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13428727#comment-13428727 ] 

Hudson commented on HBASE-6427:
-------------------------------

Integrated in HBase-0.94-security-on-Hadoop-23 #6 (See [https://builds.apache.org/job/HBase-0.94-security-on-Hadoop-23/6/])
    HBASE-6427 addendum (Revision 1367770)
HBASE-6427 Pluggable compaction and scan policies via coprocessors (Revision 1367402)

     Result = FAILURE
larsh : 
Files : 
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/ScanType.java

larsh : 
Files : 
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseRegionObserver.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/ScanType.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideWithCoprocessor.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/coprocessor/SimpleRegionObserver.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/HFileReadWriteTest.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/NoOpScanPolicyObserver.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionWithCoprocessor.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/TestMemStore.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/util/TestCoprocessorScanPolicy.java

                
> Pluggable compaction and scan policies via coprocessors
> -------------------------------------------------------
>
>                 Key: HBASE-6427
>                 URL: https://issues.apache.org/jira/browse/HBASE-6427
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Minor
>             Fix For: 0.96.0, 0.94.2
>
>         Attachments: 6427-0.94-addendum.txt, 6427-0.94.txt, 6427-notReady.txt, 6427-v1.txt, 6427-v10.txt, 6427-v2.txt, 6427-v3.txt, 6427-v4.txt, 6427-v5.txt, 6427-v7.txt
>
>
> When implementing higher level stores on top of HBase it is necessary to allow dynamic control over how long KVs must be kept around.
> Semi-static config options for ColumnFamilies (# of version or TTL) is not sufficient.
> This can be done with a few additional coprocessor hooks, or by makeing Store.ScanInfo pluggable.
> Was:
> The simplest way to achieve this is to have a pluggable class to determine the smallestReadpoint for Region. That way outside code can control what KVs to retain.

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