[CSBi-HPC] CSBi IBM cluster - available fileystem space

[Al Davis]

We temporarily ran out of space in one of the home directories on the
WI/Bioimaging part of the cluster so I want to inform everyone about other
available disk space on this part of the cluster.  The cluster currently has
5 nodes and each one has local disk space that is availabe for use -  it's
always been there, but probably not visible nor useable by everyone.  So
I've created scratch directories in each one and opened up the permissions
so anyone can read/write to files there.  These directories are cross
mounted on each node and are availabe through the following paths:

	path via host #		path via hostname			FS
size (GB)

/cluster/wi/1/scratch		/scratch/mantra801		  230
/cluster/wi/2/scratch		/scratch/mantra802		  230
/cluster/wi/3/scratch		/scratch/mantra401		  230
/cluster/wi/4/scratch		/scratch/mantra402		  130
/cluster/wi/5/scratch		/scratch/mantra803		  130

If you need permanent space for large files, create a directory with your
username in one of the above paths and keep large files there so you don't
fill up your home directory.

If you just need temporary space while your application runs, use the local
node scratch disk which will have the fastest access and is available as
/scratch/`hostname`  and please delete them at the end of your run.

A couple of caveats about this space:

1. We don't have lots of disk space on the cluster (~1 TB total) so please
be judicious with the space.

2. We currently don't have any archival backup capability on the cluster so
beware.

3. We currently don't have a good network connection between the two cluster
halves, so it's not easy to share large datasets between them.

We're working on plans to remedy all the above, but it will be a little
while till their fully implemented and in place.

4. We also have a common directory for programs and libraries which are/will
be installed on the cluster (/cluster/programs) so if you have code which
you think is useful for everyone, let me know and I can install it there
rather than in your home directory.  So far the only working code is matlab,
but I'm installing namd and some other code and when it's up and running
I'll let everyone know.

If you encounter any problems, let me know.

al
--
Al Davis                    aldavis at wi.mit.edu
Systems Manager             617.324.0519
WI/MIT BioImaging Center    500 Tech Sq, Rm 309