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From Leonid Fedotov <lfedo...@hortonworks.com>
Subject Re: Datanode disk configuration
Date Wed, 12 Nov 2014 16:47:22 GMT
Create 1 Tb partitions for 2 and 3 TB drives and you will have 5 mount
points same size.


*Thank you!*


*Sincerely,*

*Leonid Fedotov*

Systems Architect - Professional Services

lfedotov@hortonworks.com

office: +1 855 846 7866 ext 292

mobile: +1 650 430 1673

On Wed, Nov 12, 2014 at 8:36 AM, Brian C. Huffman <
bhuffman@etinternational.com> wrote:

>  All,
>
> I'm setting up a 4-node Hadoop 2.5.1 cluster.  Each node has the following
> drives:
> 1 - 500GB drive (OS disk)
> 1 - 500GB drive
> 1 - 2 TB drive
> 1 - 3 TB drive.
>
> In past experience I've had lots of issues with non-uniform drive sizes
> for HDFS, but unfortunately it wasn't an option to get all 3TB or 2TB
> drives for this cluster.
>
> My thought is to set up the 2TB and 3TB drives as HDFS and the 500GB drive
> as intermediate data.  Most our of jobs don't make large use of
> intermediate data, but at least this way, I get a good amount of space
> (2TB) per node before I run into issues.  Then I may end up using the AvailableSpaceVolumeChoosingPolicy
> to help with balancing the blocks.
>
> If necessary I could put intermediate data on one of the OS partitions
> (/home).  But this doesn't seem ideal.
>
> Anybody have any recommendations regarding the optimal use of storage in
> this scenario?
>
> Thanks,
> Brian
>

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