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Date: Wed, 30 Apr 2014 20:39:18 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12708662.1397614856135.209334.1398890358451@arcas>
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Subject: [jira] [Commented] (HBASE-10993) Deprioritize long-running scanners
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    [ https://issues.apache.org/jira/browse/HBASE-10993?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D139=
86045#comment-13986045 ]=20

Hadoop QA commented on HBASE-10993:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest a=
ttachment=20
  http://issues.apache.org/jira/secure/attachment/12642688/HBASE-10993-v3.p=
atch
  against trunk revision .
  ATTACHMENT ID: 12642688

    {color:green}+1 @author{color}.  The patch does not contain any @author=
 tags.

    {color:green}+1 tests included{color}.  The patch appears to include 8 =
new or modified tests.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any =
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 incre=
ase the total number of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce 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.util.TestBoundedPriorityBloc=
kingQueue

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/9436//tes=
tReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.=
html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.htm=
l
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9436=
//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.h=
tml
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/9436//c=
onsole

This message is automatically generated.

> Deprioritize long-running scanners
> ----------------------------------
>
>                 Key: HBASE-10993
>                 URL: https://issues.apache.org/jira/browse/HBASE-10993
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>            Priority: Minor
>             Fix For: 0.99.0
>
>         Attachments: HBASE-10993-v0.patch, HBASE-10993-v1.patch, HBASE-10=
993-v2.patch, HBASE-10993-v3.patch
>
>
> Currently we have a single call queue that serves all the "normal user"  =
requests, and the requests are executed in FIFO.
> When running map-reduce jobs and user-queries on the same machine, we wan=
t to prioritize the user-queries.
> Without changing too much code, and not having the user giving hints, we =
can add a =E2=80=9Cvtime=E2=80=9D field to the scanner, to keep track from =
how long is running. And we can replace the callQueue with a priorityQueue.=
 In this way we can deprioritize long-running scans, the longer a scan requ=
est lives the less priority it gets.


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