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Storage (Hawk): Difference between revisions
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For large files and fast I/O [http://en.wikipedia.org/wiki/Lustre_%28file_system%29 Lustre] based scratch directories are available which make use of the high speed network infrastructure. Scratch directories are available on all compute and login (frontend) nodes via the [[workspace mechanism|'''WORKSPACE MECHANISM''']]. | For large files and fast I/O [http://en.wikipedia.org/wiki/Lustre_%28file_system%29 Lustre] based scratch directories are available which make use of the high speed network infrastructure. Scratch directories are available on all compute and login (frontend) nodes via the [[workspace mechanism|'''WORKSPACE MECHANISM''']]. | ||
{{Note|text=To get the best performance using [[MPI-IO]] it may be necessary to tune the file distribution or MPI I/O info arguments.}} | {{Note|text=To get the best performance using [[MPI-IO]] it may be necessary to tune the file distribution or MPI I/O info arguments.}} | ||
{{Warning|text=Worspaces have some restrictions: First there is a '''maximum time limit''' for each workspace ( | {{Warning|text=Worspaces have some restrictions: First there is a '''maximum time limit''' for each workspace (60 days on ws10, 10 days on ws11) after which they will be '''deleted automatically'''. Second they have a group capacity quota limit and files count limit by default on ws10.}} | ||
On hawk there are 2 different workspace filesystems available, each with different properties: | On hawk there are 2 different workspace filesystems available, each with different properties: | ||
Revision as of 11:43, 29 September 2023
HOME Directories
Users' HOME directories are located on a shared RAID system and are mounted via NFS on all login (frontend) and compute nodes. The path to the HOME directories is consistent across all nodes. The filesystem space on HOME is limited by a small quota (50GB per user, 200GB per group)! The quota usage for your account and your groups can be listed using the na_quota command on the login nodes.
SCRATCH directories / workspace mechanism
For large files and fast I/O Lustre based scratch directories are available which make use of the high speed network infrastructure. Scratch directories are available on all compute and login (frontend) nodes via the WORKSPACE MECHANISM.
On hawk there are 2 different workspace filesystems available, each with different properties:
- ws10:
- Basepath: /lustre/hpe/ws10
- availabe storage capacity: 22 PB
- project quota limits: enabled for blocks and files
- max. workspace duration: 60 days
- max. workspace extensions: 3
- lustre devices: 2 MDS, 4 MDT, 8 OSS, 48 OST
- ws11:
- Basepath: /lustre/hpe/ws11
- available storage capacity: 15 PB
- project quota limits: disabled
- max. workspace duration: 10 days
- max. workspace extensions: 1
- lustre devices: 2 MDS, 2 MDT, 20 OSS, 40 OST
Each user has access to both filesystems via the WORKSPACE MECHANISM
Filesystem Policy
IMPORTANT! NO BACKUP!! There is NO backup done of any user data located on HWW Cluster systems. The only protection of your data is the redundant disk subsystem. This RAID system is able to handle a failure of one component. There is NO way to recover inadvertently removed data. Users have to backup critical data on their local site!
Long term storage
For data which should be available longer than the workspace time limit allowed and for very important data storage, please use the High Performance Storage System (HPSS)