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https://issues.apache.org/jira/browse/HBASE-4811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666219#comment-13666219
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Hadoop QA commented on HBASE-4811:
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{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12584673/hbase-4811-trunkv1.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 15 new
or modified tests.
{color:green}+1 hadoop1.0{color}. The patch compiles against the hadoop
1.0 profile.
{color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop
2.0 profile.
{color:red}-1 javadoc{color}. The javadoc tool appears to have generated 1
warning messages.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:red}-1 lineLengths{color}. The patch introduces lines longer than
100
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.client.TestFromClientSideWithCoprocessor
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/5815//console
This message is automatically generated.
> Support reverse Scan
> --------------------
>
> Key: HBASE-4811
> URL: https://issues.apache.org/jira/browse/HBASE-4811
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Affects Versions: 0.20.6, 0.94.7
> Reporter: John Carrino
> Assignee: Liang Xie
> Attachments: HBase-4811-0.94.3modified.txt, HBase-4811-0.94-v2.txt,
> hbase-4811-trunkv1.patch
>
>
> All the documentation I find about HBase says that if you want forward and
> reverse scans you should just build 2 tables and one be ascending and one
> descending. Is there a fundamental reason that HBase only supports forward
> Scan? It seems like a lot of extra space overhead and coding overhead (to
> keep them in sync) to support 2 tables.
> I am assuming this has been discussed before, but I can't find the
> discussions anywhere about it or why it would be infeasible.
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