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Storage (Hawk): Difference between revisions
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{{Warning|text=Due to the limited network performance, the HOME filesystem is not intended for use in any compute jobs! Do not read or write files within any compute job, as this will cause trouble for all users. For compute jobs please use the [[workspace mechanism]] which uses the [http://en.wikipedia.org/wiki/Lustre_%28file_system%29 Lustre] based scratch directories. }} | {{Warning|text=Due to the limited network performance, the HOME filesystem is not intended for use in any compute jobs! Do not read or write files within any compute job, as this will cause trouble for all users. For compute jobs please use the [[workspace mechanism]] which uses the [http://en.wikipedia.org/wiki/Lustre_%28file_system%29 Lustre] based scratch directories. }} | ||
In addition, a '''project''' volume can be made available on request (see [[Project_filesystem]]) | |||
=== SCRATCH directories / workspace mechanism === | === SCRATCH directories / 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''']]. | 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 ws11) after which they will be '''deleted automatically'''. Second they have a group capacity quota limit and files count limit by default on ws11.}} | ||
Properties of the workspace filesystems on hawk: | |||
* ws11: | * ws11: | ||
** Basepath: /lustre/hpe/ws11 | ** Basepath: /lustre/hpe/ws11 | ||
** available storage capacity: 15 PB | ** available storage capacity: 15 PB | ||
** project quota limits: disabled | ** project quota limits: disabled | ||
** max. workspace duration: | ** max. workspace duration: 60 days | ||
** max. workspace extensions: | ** max. workspace extensions: 3 | ||
** lustre devices: 2 MDS, 20 OSS, 40 OST | ** lustre devices: 2 MDS, 2 MDT, 20 OSS, 40 OST | ||
** performance: ~200 GiB/s | |||
Each user has access to both filesystems via the [[workspace mechanism|'''WORKSPACE MECHANISM''']] | Each user has access to both filesystems via the [[workspace mechanism|'''WORKSPACE MECHANISM''']] | ||
=== localscratch === | |||
Some special node types (AI nodes, Pre-Post nodes, login nodes, see also [[Batch_System_PBSPro_(Hawk)#Node_types | node_types ]]) have a local disk installed and mounted on /localscratch. On this nodes: | |||
* each batchjob creates a /localscratch/$PBS_JOBID directory owned by the job owner. | |||
* each ssh login session creates a /localscratch/$UID directory owned by $UID. | |||
* at the end of a user batch job, the directory $PBS_JOBID in /localscratch on the node will be removed! | |||
* at the end of all login sessions of a user on a node, the $UID directorie in /localscratch will be removed! | |||
* the individual /localscratch filesystem on the nodes is not shared with other nodes. | |||
=== Filesystem Policy === | === 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! | 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! | ||
Please see also [[Storage_usage_policy#Usage_guidelines_for_workspace_filesystems]] | |||
== Long term storage == | == 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)]] | 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)]] | ||
Latest revision as of 10:57, 27 November 2024
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.
In addition, a project volume can be made available on request (see Project_filesystem)
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.
Properties of the workspace filesystems on hawk:
- ws11:
- Basepath: /lustre/hpe/ws11
- available storage capacity: 15 PB
- project quota limits: disabled
- max. workspace duration: 60 days
- max. workspace extensions: 3
- lustre devices: 2 MDS, 2 MDT, 20 OSS, 40 OST
- performance: ~200 GiB/s
Each user has access to both filesystems via the WORKSPACE MECHANISM
localscratch
Some special node types (AI nodes, Pre-Post nodes, login nodes, see also node_types ) have a local disk installed and mounted on /localscratch. On this nodes:
- each batchjob creates a /localscratch/$PBS_JOBID directory owned by the job owner.
- each ssh login session creates a /localscratch/$UID directory owned by $UID.
- at the end of a user batch job, the directory $PBS_JOBID in /localscratch on the node will be removed!
- at the end of all login sessions of a user on a node, the $UID directorie in /localscratch will be removed!
- the individual /localscratch filesystem on the nodes is not shared with other nodes.
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! Please see also Storage_usage_policy#Usage_guidelines_for_workspace_filesystems
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)