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From Adam Muise <amu...@hortonworks.com>
Subject Re: HDFS read/write data throttling
Date Mon, 11 Nov 2013 19:27:19 GMT
See https://issues.apache.org/jira/browse/HDFS-3475

Please note that this has met with many unexpected impacts on workload. Be
careful and be mindful of your Datanode memory and network capacity.




On Mon, Nov 11, 2013 at 1:59 PM, lohit <lohit.vijayarenu@gmail.com> wrote:

> Hello Devs,
>
> Wanted to reach out and see if anyone has thought about ability to throttle
> data transfer within HDFS. One option we have been thinking is to throttle
> on a per FileSystem basis, similar to Statistics in FileSystem. This would
> mean anyone with handle to HDFS/Hftp will be throttled globally within JVM.
> Right value to come up for this would be based on type of hardware we use
> and how many tasks/clients we allow.
>
> On the other hand doing something like this at FileSystem layer would mean
> many other tasks such as Job jar copy, DistributedCache copy and any hidden
> data movement would also be throttled. We wanted to know if anyone has had
> such requirement on their clusters in the past and what was the thinking
> around it. Appreciate your inputs/comments
>
> --
> Have a Nice Day!
> Lohit
>



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