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From Arun C Murthy <...@hortonworks.com>
Subject Re: Relevance of mapreduce.* configuration properties for MR V2
Date Thu, 16 Aug 2012 18:42:21 GMT
http://hadoop.apache.org/common/docs/r2.0.0-alpha/hadoop-yarn/hadoop-yarn-site/ClusterSetup.html

On Aug 16, 2012, at 10:37 AM, mg wrote:

> Hi,
> 
> thanks.
> 
> But there are many more mapreduce.* properties. ...
> 
> Does anyone have more information on those with respect to whether they are relevant
to YARN, and if so, what they exactly mean in the YARN context?
> 
> I am trying to optimize settings in order to use as much RAM and CPU as possible. The
cluster has 8 node managers each with 96GB RAM and 16 CPUs (cpuinfo: Intel(R) Xeon(R) CPU
E5620 @ 2.40GHz)
> 
> Cheers,
> Martin
> 
> On 16.08.2012 18:40, anil gupta wrote:
>> Hi,
>> 
>> AFAIK, these properties are being ignored by YARN:
>> - mapreduce.tasktracker.map.tasks.maximum,
>> - mapreduce.tasktracker.reduce.tasks.maximum
>> 
>> Thanks,
>> Anil Gupta
>> 
>> 
>> On Thu, Aug 16, 2012 at 9:28 AM, mg <userformailinglists@gmail.com
>> <mailto:userformailinglists@gmail.com>> wrote:
>> 
>>    Hi,
>> 
>>    I am currently trying to tune a CDH 4.0.1 (i~ hadoop 2.0.0-alpha)
>>    cluster running HDFS, YARN, and HBase managed by Cloudera Manager
>>    4.0.3 (Free Edition).
>> 
>> 
>>    In CM, there are a number of options for setting mapreduce.*
>>    configuration properties on the YARN client page.
>> 
>>    Some of the properties and their explanations in the GUI still refer
>>    to JobTracker and TaskTracker, e.g.,
>> 
>>    - mapreduce.jobtracker.handler.__count,
>>    - mapreduce.tasktracker.map.__tasks.maximum,
>>    - mapreduce.tasktracker.reduce.__tasks.maximum
>> 
>>    I wonder whether these and a number of other mapreduce.* (e.g.,
>>    mapreduce.job.reduces) properties are observed by the MR2
>>    ApplicationMaster (and how), or not.
>> 
>> 
>>    Can anyone clarify or point to respective documentation?
>> 
>>    Thanks,
>>    Martin
>> 
>> 
>> 
>> 
>> --
>> Thanks & Regards,
>> Anil Gupta

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/



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