More about the dvio resource

Use it, even if you think you do not need it.
Each disk valt has only 2CPU’s so it can talk to a finite number of jobs.
If too many jobs try to read data at the same time, the disk vault goes into a thrashing mode (spends all the time trying to figure out whom to serve) and then gets “wedged” and only reboot can bring it back ( 510 486 6821, but suspend some of your jobs first!!!!! )
Each disk vault has 1000 units assigned to it
Each disk vault can handle about 30 I/O intensive jobs ( /aztera is an exception, it can handle couple hundred of jobs simultaneously)
Syntax is important – check PDSF FAQ!
bsub –q medium –R “select[defined(dv27io)&&defined(dv34io)&&scratch>2000] rusage[dv27io=33:dv34io=33] “ <your job>
Read from your disk vault write to /scratch

Use it, even if you think you do not need it.