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Posted to issues@carbondata.apache.org by watermen <gi...@git.apache.org> on 2017/04/27 07:57:55 UTC

[GitHub] incubator-carbondata pull request #863: [CARBONDATA-998] Don't request execu...

GitHub user watermen opened a pull request:

    https://github.com/apache/incubator-carbondata/pull/863

    [CARBONDATA-998] Don't request executors when we use carbon distribution

    In the current implementation, carbon request executors if it need more executors. This brings the following questions:
    1. Carbon interferes with spark dispatch to make request/remove executors confusedly.
    2. Carbon will involk DistributionUtil.getDistinctNodesList and sleep some times to make sure the executors are assigned, it wastes a lot of time.
    
    We'd better make the data scan and schedule independently.
    
    ### In CarbonData layout
    Make one task scan multiple splits to make the input size of task larger and the number of tasks fewer.
    ### In Spark layout(dynamic allocation is enable)
    Request executors if some resources are released by other apps and we won't reach the max number of executors.
    
    Now, I only invoke DistributionUtil.getNodeList insteads of DistributionUtil.ensureExecutorsAndGetNodeList. We can talked about this idea here and then I can remove the useless code about DistributionUtil.ensureExecutorsAndGetNodeList.
    
    cc @jackylk @QiangCai @kumarvishal09 

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/watermen/incubator-carbondata CARBONDATA-998

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-carbondata/pull/863.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #863
    
----
commit 824d0f7790f5559d48be6b1878786bc384af51a9
Author: Yadong Qi <qi...@gmail.com>
Date:   2017-04-27T07:54:49Z

    Don't request executors when we use carbon distribution

----


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[GitHub] incubator-carbondata issue #863: [CARBONDATA-998] Don't request executors wh...

Posted by CarbonDataQA <gi...@git.apache.org>.
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/incubator-carbondata/pull/863
  
    Build Success with Spark 1.6.2, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder/1823/



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[GitHub] incubator-carbondata issue #863: [CARBONDATA-998] Don't request executors wh...

Posted by CarbonDataQA <gi...@git.apache.org>.
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/incubator-carbondata/pull/863
  
    Build Success with Spark 1.6.2, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder/1826/



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