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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9343) Implement stateless scanner for Stargate
Date Tue, 14 Jan 2014 04:31:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13870376#comment-13870376
] 

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/12622756/HBASE-9343_trunk.04.patch
  against trunk revision .
  ATTACHMENT ID: 12622756

    {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 hadoop1.1{color}.  The patch compiles against the hadoop 1.1 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:red}-1 site{color}.  The patch appears to cause mvn site goal to fail.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/8413//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
>             Fix For: 0.98.1, 0.99.0
>
>         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, HBASE-9343_trunk.03.patch,
HBASE-9343_trunk.04.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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