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https://issues.apache.org/jira/browse/HBASE-10018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13962328#comment-13962328
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Hudson commented on HBASE-10018:
--------------------------------
ABORTED: Integrated in HBase-TRUNK #5070 (See
[https://builds.apache.org/job/HBase-TRUNK/5070/])
HBASE-10018 Change the location prefetch (nkeywal: rev 1585518)
* /hbase/trunk/bin/region_mover.rb
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnection.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionKey.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableInterface.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTablePool.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaScanner.java
*
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
*
/hbase/trunk/hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/client/HTableWrapper.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
*
/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestCoprocessorScanPolicy.java
*
/hbase/trunk/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftServerRunner.java
> Remove region location prefetching
> ----------------------------------
>
> Key: HBASE-10018
> URL: https://issues.apache.org/jira/browse/HBASE-10018
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0, 0.96.0
> Reporter: Nicolas Liochon
> Assignee: Nicolas Liochon
> Fix For: 0.99.0
>
> Attachments: 10018.v1.patch, 10018.v2.patch, 10018.v4.patch,
> 10018.v5.patch, 10018.v6.patch, 10018v3.patch
>
>
> Issues with prefetching are:
> - we do two calls to meta: one for the exact row, one for the prefetch
> - it's done in a lock
> - we take the next 10 regions. Why 10, why the 10 next?
> - is it useful if the table has 100K regions?
> Options are:
> - just remove it
> - replace it with a reverse scan: this would save a call
>
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