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From tnachen <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-6350][Mesos] Make mesosExecutorCores co...
Date Sat, 21 Mar 2015 07:16:40 GMT
Github user tnachen commented on the pull request:

    https://github.com/apache/spark/pull/5063#issuecomment-84272183
  
    @sryza I believe this setting is a bit unique for Mesos. I think it's better to clarify
the terminology here, of what does framework and executor means for Mesos. 
    
    In mesos a scheduler is the process which registers with Master to receives offers, and
use these offers to launch tasks through the master and eventually the slave. An executor
is responsible for actually launching a task and reporting task statuses that is launched
on the slaves, which either is a custom executor that fine-grain mode uses or the default
mesos executor that coarse-grain mode uses. And a framework is referring to the overall scheduler
+ executor.
    
    So in the Mesos fine-grain case, we have an custom executor that is only launched once
per slave, and that running executor takes up some cpu/mem itself.
    
    IMO I think calling it spark.mesos.executor.cores is fine enough, I wouldn't put framework
in there as framework is not the right terminology.
    



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