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Center for High Performance Computing (CHPC)

 

How to Cite the CHPC
 
The following text should be used when citing our HPC resources in your research:
 
"Computations were performed using the facilities of the Washington University Center for High Performance Computing, which were partially provided through grant NCRR 1S10RR022984-01A1."
 
Disk space policies
 
Home directories
 
Home directories are for permanent storage.   By default, users will get a 5GB 'soft' quota for their home directory, with a 6GB 'hard' quota.  This means that you can utilize up to 6GB for 7 days, but after that you must get your usage below 5GB before you can create any additional files.  Home directories are backed up nightly, but users are strongly encouraged to back up important files to some external resource.

Scratch directories
 
The scratch disk (/scratch) is for temporary file storage. You can upload any data you need to process to /scratch, run your jobs, copy your results to some other storage system, then clean up your data.  Since it's inevitable that some users wont do this, beginning 3/15/11 we're going to enable an automated 'file-wiper' that will look for any old files and delete them.  Beginning 8/1/12, old will mean any files >90 days old, but this might be adjusted in the future.  You can always check back here to see the latest policy regarding scratch space.
 
By default, users will get a 100GB 'soft' quota for scratch, with a 200GB 'hard' quota.  This means that you can utilize up to 200GB for 7 days, but after that you must get your usage below 100GB before you can create any additional files.  There is also a limit on the number of files+directories (i.e. inodes) that you can create on scratch of 1M 'soft'/2M 'hard'.
 
If you ever need additional space for a project, please let us know how much space you'll need and how long you'll need it and we'll try to accomodate your requests.
 
BlueArc-scratch directories
 
The BlueArc scratch directory (/BlueArc-scratch) is an additional temporary storage pool available to users that have either purchased or lease space on Radiology's BlueArc system.   Directories are made available upon request by the user.  You can upload any data you need to process to /BlueArc-scratch, run your jobs, copy your results to some other storage system, then clean up your data.  Any files >28 days old will be eligible for deletion.
 
By default, users will get a 1TB quota for BlueArc-scratch.  There is also a limit on the number of files+directories (i.e. inodes) that you can create of 500K.
 
If you ever need additional space for a project, please let us know how much space you'll need and how long you'll need it and we'll try to accomodate your requests.
 
BlueArc leased space
 
Users requiring more permanent storage than provided by their home directories have the option of leasing space on Radiology's BlueArc system.  Storage is available for $800/TB/year.  This storage space is fully backed up and professionally managed.  We have the ability to grow this leased space to hundreds of terabytes.  These directories are available on the login nodes, but not on the compute nodes.  By leasing space, users are automatically eligible to use the 44TB BlueArc-scratch space for processing their data.  Data should be staged-in by copying it from the leased area to the scratch space, then processed on the compute nodes, then any results that are to be kept should be copied back into the leased area, and finally all temporary files should be deleted.