OrangeFS works fine across the compute nodes as storage, many people use it that way, so you are fine. As with the backup, also make sure you take regular backups of the metadata as well. The easiest setup would be to have each node be a metadata and an I/O node.
-boyd On Sat, May 19, 2012 at 6:53 PM, Ramon Diaz-Uriarte <[email protected]>wrote: > > Dear All, > > I have some general questions about whether, in my setup, it makes sense > to use OrangeFS and, if it makes sense, the recommended usage patterns. > > > Context > ======= > > We have a two node cluster (a Dell PowerEdge C6145). Each node has four > SAS HDs (600 GB each) per node (which I'll most likely use as a single > virtual disk using the RAID card). Each node also has four AMD Opteron > 6276 sockets (16 cores per socket) and 256 GB RAM. The two nodes are > connected via Infiniband. > > > We will be using the cluster for bioinformatics/statistics computing, > including programs that use MPI and OpenMP, as well as giving access (via > web-based applications) to those same bioinfo/stats computing programs. > > > The main reason for considering OrangeFS is to provide a single > shared-disk file system for homes, application code, result storage, > scratch space, tmp files, etc. > > > Questions: > ========== > > > 1. I've seen it recommended that computing and storage nodes be different > (e.g., FAQ, 3.6). However, having different computing and storage nodes > would not make sense in my case. Anything I am missing? > > > 2. Is it an overkill to use OrangeFS in my scenario? > > > 3. If one of the nodes fails, and if I keep a backup of the data, can I > recover by just copying the shared disk backup, and mounting as a > regular, local, file system? (To allow this, I think I need to create > the backups from one of the clients, not just the data held by a single > server ---i.e., I would not use the approach in the FAQ, 9.1) > > > 4. I understand things will be much cleaner if I use a dedicated partition > (in each machine) to be used as a brick, instead of a directory? > > > 5. What other options might I consider? I am also thinking about GlusterFS > (and asking similar questions on their list). (Lustre definitely seems > to discourage client and OSS in same node). > > > Any other comments or suggestions for this setup are welcome. > > > Best, > > R. > > -- > Ramon Diaz-Uriarte > Department of Biochemistry, Lab B-25 > Facultad de Medicina > Universidad Autónoma de Madrid > Arzobispo Morcillo, 4 > 28029 Madrid > Spain > > Phone: +34-91-497-2412 > > Email: [email protected] > [email protected] > > http://ligarto.org/rdiaz > > > _______________________________________________ > Pvfs2-users mailing list > [email protected] > http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users >
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