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Date: Sun, 22 Sep 2013 23:56:05 +0000 (UTC)
From: "Vandana Ayyalasomayajula (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12665605.1377554604964.764.1379894165455@arcas>
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Subject: [jira] [Commented] (HBASE-9343) Implement stateless scanner for
 Stargate
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    [ https://issues.apache.org/jira/browse/HBASE-9343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13774195#comment-13774195 ] 

Vandana Ayyalasomayajula commented on HBASE-9343:
-------------------------------------------------

Hi,

I am on maternity leave till 9th December, 2013. If you need any assistance please contact olgan@yahoo-inc.com.

Thanks
Vandana

On Sep 6, 2013, at 8:26 PM, Hadoop QA (JIRA) <jira@apache.org> wrote:

   [ https://issues.apache.org/jira/browse/HBASE-9343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760898#comment-13760898 ]

Hadoop QA commented on HBASE-9343:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment
 http://issues.apache.org/jira/secure/attachment/12601953/HBASE-9343_trunk.01.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 16 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: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 increase 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:


    {color:red}-1 core zombie tests{color}.  There are 1 zombie test(s):

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7081//console

This message is automatically generated.

Implement stateless scanner for Stargate
----------------------------------------

               Key: HBASE-9343
               URL: https://issues.apache.org/jira/browse/HBASE-9343
           Project: HBase
        Issue Type: Improvement
        Components: REST
  Affects Versions: 0.94.11
          Reporter: Vandana Ayyalasomayajula
          Assignee: Vandana Ayyalasomayajula
          Priority: Minor
       Attachments: HBASE-9343_94.00.patch, HBASE-9343_94.01.patch, HBASE-9343_trunk.00.patch, HBASE-9343_trunk.01.patch


The current scanner implementation for scanner stores state and hence not very suitable for REST server failure scenarios. The current JIRA proposes to implement a stateless scanner. In the first version of the patch, a new resource class "ScanResource" has been added and all the scan parameters will be specified as query params.
The following are the scan parameters
startrow -  The start row for the scan.
endrow - The end row for the scan.
columns - The columns to scan.
starttime, endtime - To only retrieve columns within a specific range of version timestamps,both start and end time must be specified.
maxversions  - To limit the number of versions of each column to be returned.
batchsize - To limit the maximum number of values returned for each call to next().
limit - The number of rows to return in the scan operation.
More on start row, end row and limit parameters.
1. If start row, end row and limit not specified, then the whole table will be scanned.
2. If start row and limit (say N) is specified, then the scan operation will return N rows from the start row specified.
3. If only limit parameter is specified, then the scan operation will return N rows from the start of the table.
4. If limit and end row are specified, then the scan operation will return N rows from start of table till the end row. If the end row is
reached before N rows ( say M and M &lt; N ), then M rows will be returned to the user.
5. If start row, end row and limit (say N ) are specified and N &lt; number of rows between start row and end row, then N rows from start row
will be returned to the user. If N &gt; (number of rows between start row and end row (say M), then M number of rows will be returned to the
user.

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> Implement stateless scanner for Stargate
> ----------------------------------------
>
>                 Key: HBASE-9343
>                 URL: https://issues.apache.org/jira/browse/HBASE-9343
>             Project: HBase
>          Issue Type: Improvement
>          Components: REST
>    Affects Versions: 0.94.11
>            Reporter: Vandana Ayyalasomayajula
>            Assignee: Vandana Ayyalasomayajula
>            Priority: Minor
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: HBASE-9343_94.00.patch, HBASE-9343_94.01.patch, HBASE-9343_trunk.00.patch, HBASE-9343_trunk.01.patch, HBASE-9343_trunk.01.patch, HBASE-9343_trunk.02.patch
>
>
> The current scanner implementation for scanner stores state and hence not very suitable for REST server failure scenarios. The current JIRA proposes to implement a stateless scanner. In the first version of the patch, a new resource class "ScanResource" has been added and all the scan parameters will be specified as query params. 
> The following are the scan parameters
> startrow -  The start row for the scan.
> endrow - The end row for the scan.
> columns - The columns to scan. 
> starttime, endtime - To only retrieve columns within a specific range of version timestamps,both start and end time must be specified.
> maxversions  - To limit the number of versions of each column to be returned.
> batchsize - To limit the maximum number of values returned for each call to next().
> limit - The number of rows to return in the scan operation.
>  More on start row, end row and limit parameters.
> 1. If start row, end row and limit not specified, then the whole table will be scanned.
> 2. If start row and limit (say N) is specified, then the scan operation will return N rows from the start row specified.
> 3. If only limit parameter is specified, then the scan operation will return N rows from the start of the table.
> 4. If limit and end row are specified, then the scan operation will return N rows from start of table till the end row. If the end row is 
> reached before N rows ( say M and M &lt; N ), then M rows will be returned to the user.
> 5. If start row, end row and limit (say N ) are specified and N &lt; number of rows between start row and end row, then N rows from start row
> will be returned to the user. If N &gt; (number of rows between start row and end row (say M), then M number of rows will be returned to the
> user.

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