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Posted to issues@hbase.apache.org by "Nicolas Spiegelberg (Created) (JIRA)" <ji...@apache.org> on 2011/12/01 00:13:39 UTC
[jira] [Created] (HBASE-4914) Support N-mappers per Region
Support N-mappers per Region
----------------------------
Key: HBASE-4914
URL: https://issues.apache.org/jira/browse/HBASE-4914
Project: HBase
Issue Type: Sub-task
Reporter: Nicolas Spiegelberg
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[jira] [Commented] (HBASE-4914) Enhance MapReduce TableInputFormat
to Support N-mappers per Region
Posted by "Lars Hofhansl (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234505#comment-13234505 ]
Lars Hofhansl commented on HBASE-4914:
--------------------------------------
Again, this does not look like a 0.94 blocker.
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Blocker
> Fix For: 0.94.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Updated] (HBASE-4914) Enhance MapReduce TableInputFormat to
Support N-mappers per Region
Posted by "Lars Hofhansl (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lars Hofhansl updated HBASE-4914:
---------------------------------
Priority: Critical (was: Blocker)
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Critical
> Fix For: 0.96.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Updated] (HBASE-4914) Enhance MapReduce TableInputFormat to
Support N-mappers per Region
Posted by "Nicolas Spiegelberg (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nicolas Spiegelberg updated HBASE-4914:
---------------------------------------
Description: Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
Priority: Minor (was: Major)
Summary: Enhance MapReduce TableInputFormat to Support N-mappers per Region (was: Support N-mappers per Region)
Need to port from 89-fb. See SVN #1181607
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Minor
> Fix For: 0.94.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Updated] (HBASE-4914) Enhance MapReduce TableInputFormat to
Support N-mappers per Region
Posted by "Lars Hofhansl (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lars Hofhansl updated HBASE-4914:
---------------------------------
Fix Version/s: (was: 0.94.0)
0.96.0
Moving out of 0.94. Pull back if you disagree.
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Blocker
> Fix For: 0.96.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Commented] (HBASE-4914) Enhance MapReduce TableInputFormat
to Support N-mappers per Region
Posted by "Cosmin Lehene (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13231008#comment-13231008 ]
Cosmin Lehene commented on HBASE-4914:
--------------------------------------
Hadoop 0.20 doesn't behave well with large number of map tasks, so we implemented a N-Regions per map (through a splits_per_map property).
I guess ideally we should be able to specify a min/max number of map tasks as well and have these two happen implicitly, perhaps with some sane thresholds.
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Blocker
> Fix For: 0.94.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Commented] (HBASE-4914) Enhance MapReduce TableInputFormat
to Support N-mappers per Region
Posted by "Lars Hofhansl (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13235650#comment-13235650 ]
Lars Hofhansl commented on HBASE-4914:
--------------------------------------
Please comment today on why this is a blocker for 0.94. Otherwise I'll move this out of 0.94.
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Blocker
> Fix For: 0.94.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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[jira] [Updated] (HBASE-4914) Enhance MapReduce TableInputFormat to
Support N-mappers per Region
Posted by "stack (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-4914:
-------------------------
Priority: Blocker (was: Minor)
Made blocker on 0.94.0 at Nicolas's suggestion
> Enhance MapReduce TableInputFormat to Support N-mappers per Region
> ------------------------------------------------------------------
>
> Key: HBASE-4914
> URL: https://issues.apache.org/jira/browse/HBASE-4914
> Project: HBase
> Issue Type: Sub-task
> Components: client, regionserver
> Reporter: Nicolas Spiegelberg
> Priority: Blocker
> Fix For: 0.94.0
>
>
> Current TableInputFormat based MR jobs create exactly one mapper per region where each mapper sets one Scan with appropriate start/stop row keys. This change allows jobs to be run with any number of mappers per region, so that when a mapper fails, there will be less data to be reprocessed.
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