File Systems
Overview of PDSF File Systems
User Home Directories
User home directories are located under '/u/login-name' directory structure.
Thy are cross-mounted to all PDSF nodes and regularly
backed up. Home directories currently have 500MB disk
quotas. quota command shows user's quotas in blcks (1block = 256 kB)
Local Scratch Areas
These areas are designated as '/scratch' on each PDSF node.
The disks are NOT cross mounted between nodes in the PDSF
system.
The scratch areas currently are partitions
(on average ~10 GB for batch and
55 GB for interactive linux systems ,
245 GB for pdsfsu00 system)
useful for single node processes with significant I/O requirments
which can be directed to locally stored data files. Files in these
areas are not backed up and should be moved to more stable storage
areas after use.
We have the following policy for scratch cleanup on the interactive nodes:
- If the partition is greater than 95% full, delete all files except those of running jobs.
On batch nodes only files belonging to the currently running jobs are kept.
Users can request their LSF jobs to be send to nodes with a specific amount of
scratch space available by specifying a
scratch resource requirement.
Long Term Storage
Long Term Storage is provided via
disk vaults with group designation.All disk vault partitions
are exported to all the nodes in the cluster.
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