Andrew: 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.
Becky On Mon, Feb 20, 2012 at 4:30 PM, Andrew Savchenko <birc...@gmail.com> wrote: > Hello, > > 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 > -- Becky Ligon OrangeFS Support and Development Omnibond Systems Anderson, South Carolina
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