[Pvfs2-developers] Re: [Pvfs2-users] OrangeFS on nodes with
different storage space capacities.
ligon at omnibond.com
Mon Feb 20 22:16:44 EST 2012
It is possible to use a different distribution (other than simple stripe)
that will take advantage of servers with different space allocations.
However, the code that performs this service hasn't been used in a very
long time. My co-worker is going to look into it and see if this
distribution is still viable. I'll get back to you when we know.
On Mon, Feb 20, 2012 at 4:30 PM, Andrew Savchenko <bircoph at gmail.com> wrote:
> On Mon, 20 Feb 2012 13:47:45 -0500 Becky Ligon wrote:
> > Andrew:
> > Having two servers on the 2S machine should work fine, but it does depend
> > on the storage backend and how it is connected to the server. If you are
> > using local storage, then you are correct in that having two servers
> > *could* be a performance hit; however, if you are using some sort of SAN,
> > then that statement may not be valid. In our own environment, we had 4
> > servers running on one machine attached to a DDN device, and performance
> > was good. How is your 2S storage attached?
> Each S is just a local SATA hard drive, though with good hardware
> cache. Each node has 8 cores and 8 GB RAM. 2S node is a master node,
> it has double in disks and half in CPU/RAM: 4/4. On top of that each
> node will be used for computing (MPI/PBS), master node will be used
> only partially. I'm aware, using the same hosts for both storage and
> computing will hurt overall performance, but with current hardware it
> is the best I can do.
> Best regards,
> Andrew Savchenko
OrangeFS Support and Development
Anderson, South Carolina
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