Super Computing Wales offers two types of storage: home directories and scratch.<\/p>\n
The scratch disks are large, have large per-user quotas, are on fast storage but only intended for short term storage of temporary data. Please don’t leave data on the scratch disk once you are finished with it. If the disk fills up it will negatively impact on other users ability to run jobs.<\/p>\n
Home directories have a default quota of 50GB per user, they are slower to access and are intended for longer term storage of data. However, please note that you should backup important data elsewhere as we do not formally offer an SCW backup service.<\/p>\n
Quotas are enabled on Supercomputing Wales home directories.<\/p>\n
These limit the amount of storage space and number of files that a user or group can store in their respective home directory location.<\/p>\n
To view your allocation, use the ‘myquota’ command, like this:<\/p>\n
[a.n.other@cl1 ~]$ myquota\nDisk quotas for group a.n.other (gid 1693): \n\u00a0\u00a0\u00a0\u00a0 Filesystem\u00a0 blocks\u00a0\u00a0 quota\u00a0\u00a0 limit\u00a0\u00a0 grace\u00a0\u00a0 files\u00a0\u00a0 quota\u00a0\u00a0 limit\u00a0\u00a0 grace\ncfsfs001-s05:\/nfsshare\/exports\/space05\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 402G\u00a0\u00a0\u00a0 500G\u00a0\u00a0\u00a0 525G\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 192k\u00a0\u00a0 1000k\u00a0\u00a0 1050k<\/pre><\/p>\nIn this example, we see six items of data:<\/p>\n
A ‘soft limit’ can be exceeded for a period of maximum 7 days, after which utilisation must be reduced below the threshold or error will result. In this case, the ‘grace’ item in the ‘myquota’ output will display the number of days remaining in this state.<\/p>\n
A ‘hard limit’ cannot be exceeded and attempts to do so will result in error.<\/p>\n