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Posted to solr-dev@lucene.apache.org by "Noble Paul (JIRA)" <ji...@apache.org> on 2009/08/09 09:52:14 UTC
[jira] Created: (SOLR-1352) DIH: MultiThreaded
DIH: MultiThreaded
------------------
Key: SOLR-1352
URL: https://issues.apache.org/jira/browse/SOLR-1352
Project: Solr
Issue Type: Improvement
Components: contrib - DataImportHandler
Reporter: Noble Paul
Assignee: Noble Paul
Fix For: 1.5
It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
{code:xml}
<entity name="foo" numThreads="4">
<!--more stuff goes here-->
</entity>
{code}
at the entity where the numThreads is specified it should fork into multiple threads. If the numThreads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
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[jira] Resolved: (SOLR-1352) DIH: MultiThreaded
Posted by "Noble Paul (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul resolved SOLR-1352.
------------------------------
Resolution: Fixed
committed Revision: 898209
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
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[jira] Commented: (SOLR-1352) DIH: MultiThreaded
Posted by "Avlesh Singh (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741047#action_12741047 ]
Avlesh Singh commented on SOLR-1352:
------------------------------------
Thanks, once again :), for creating the ticket, Noble.
Here's the last discussion on the topic, "Support for batch processing of commands using parallel threads in DIH" - http://www.lucidimagination.com/search/document/a9b26ade46466ee/queries_regarding_a_paralleldataimporthandler
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" numThreads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the numThreads is specified it should fork into multiple threads. If the numThreads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
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[jira] Commented: (SOLR-1352) DIH: MultiThreaded
Posted by "Lance Norskog (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12795939#action_12795939 ]
Lance Norskog commented on SOLR-1352:
-------------------------------------
In the future, especially with multi-threaded operations, the DIH will benefit from converting to immutable objects wherever possible.
I have used this technique on a few multithreaded projects and it has really helped:
http://codeidol.com/java/effective-java/Processing/Item-38-Favor-the-immutable,-for-it-needs-no-locks/
("Effective Enterprise Java" is one my favorite system architecture books.)
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
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[jira] Updated: (SOLR-1352) DIH: MultiThreaded
Posted by "Lance Norskog (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lance Norskog updated SOLR-1352:
--------------------------------
Comment: was deleted
(was: In the future, especially with multi-threaded operations, the DIH will benefit from converting to immutable objects wherever possible.
I have used this technique on a few multithreaded projects and it has really helped:
http://codeidol.com/java/effective-java/Processing/Item-38-Favor-the-immutable,-for-it-needs-no-locks/
("Effective Enterprise Java" is one my favorite system architecture books.)
)
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
--
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[jira] Updated: (SOLR-1352) DIH: MultiThreaded
Posted by "Noble Paul (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul updated SOLR-1352:
-----------------------------
Attachment: SOLR-1352.patch
first cut an ugly patch. a lot of work left before putting it in
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" numThreads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the numThreads is specified it should fork into multiple threads. If the numThreads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
--
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[jira] Updated: (SOLR-1352) DIH: MultiThreaded
Posted by "Noble Paul (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul updated SOLR-1352:
-----------------------------
Description:
It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
{code:xml}
<entity name="foo" threads="4">
<!--more stuff goes here-->
</entity>
{code}
at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
was:
It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
{code:xml}
<entity name="foo" numThreads="4">
<!--more stuff goes here-->
</entity>
{code}
at the entity where the numThreads is specified it should fork into multiple threads. If the numThreads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
'numThreads' becomes' threads'
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
--
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[jira] Updated: (SOLR-1352) DIH: MultiThreaded
Posted by "Noble Paul (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul updated SOLR-1352:
-----------------------------
Attachment: SOLR-1352.patch
More or less final. I plan to commit this soon
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
--
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[jira] Updated: (SOLR-1352) DIH: MultiThreaded
Posted by "Noble Paul (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/SOLR-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Noble Paul updated SOLR-1352:
-----------------------------
Attachment: SOLR-1352.patch
updated to trunk
> DIH: MultiThreaded
> ------------------
>
> Key: SOLR-1352
> URL: https://issues.apache.org/jira/browse/SOLR-1352
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Reporter: Noble Paul
> Assignee: Noble Paul
> Fix For: 1.5
>
> Attachments: SOLR-1352.patch, SOLR-1352.patch
>
>
> It has been a long pending request to make DIH multithreaded. Now that we have implemented most of the features , the next best thing we can aim for is performance. DIH should be able to take advantage of multiple cores in a box .I expect the configuration to be as follows
> {code:xml}
> <entity name="foo" threads="4">
> <!--more stuff goes here-->
> </entity>
> {code}
> at the entity where the threads is specified it should fork into multiple threads. If the threads<2 it executes w/o forking. In debug mode it automatically becomes singlethreaded.
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