You set maxMaps to 200,  

so the maximum running mappers should be no more than 200

Best, 

-- 
Nan Zhu
School of Computer Science,
McGill University



On Thursday, 8 November, 2012 at 6:12 PM, Matt Goeke wrote:

> Pretty straight forward question but can the fair share factor actually 
> impact the total number of jobs / slots a pool can take up even if it is the 
> only pool with active jobs submitted?
> 
> We currently have a pool that has this configuration: 
> "minMaps": 2,
> "minReduces": 1,
> "maxMaps": 200,
> "maxReduces": 66,
> "maxRunningJobs": 200,
> "minSharePreemptionTimeout": 300,
> "weight": "4.0"
> 
> The total cluster capacity is over above 250 mappers but we are finding that 
> this pool is never able to hit that max capacity for maps OR jobs even during 
> load tests. I was about to bump the minMaps property but I wanted to confirm 
> that this could potentially help alleviate our issue. 
> 
> -- 
> Matt
> 
> 
> 
> 


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