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From Zhijie Shen <zs...@hortonworks.com>
Subject Re: ulimit for Hive
Date Tue, 12 Aug 2014 17:33:53 GMT
+ Hive user mailing list

It should be a better place for your questions.


On Mon, Aug 11, 2014 at 3:17 PM, Ana Gillan <ana.gillan@gmail.com> wrote:

> Hi,
>
> I’ve been reading a lot of posts about needing to set a high ulimit for
> file descriptors in Hadoop and I think it’s probably the cause of a lot of
> the errors I’ve been having when trying to run queries on larger data sets
> in Hive. However, I’m really confused about how and where to set the limit,
> so I have a number of questions:
>
>    1. How high is it recommended to set the ulimit?
>    2. What is the difference between soft and hard limits? Which one
>    needs to be set to the value from question 1?
>    3. For which user(s) do I set the ulimit? If I am running the Hive
>    query with my login, do I set my own ulimit to the high value?
>    4. Do I need to set this limit for these users on all the machines in
>    the cluster? (we have one master node and 6 slave nodes)
>    5. Do I need to restart anything after configuring the ulimit?
>
> Thanks in advance,
> Ana
>



-- 
Zhijie Shen
Hortonworks Inc.
http://hortonworks.com/

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