During Q4 2014, NSC replaced the storage system that provides the shared file systems (/home, /nobackup/global, /software) to our Triolith and Gamma systems.
The new system has also replaced the Vagn storage system.
The most important change that you need to be aware of is that all storage is now connected to a project. Personal storage (i.e /nobackup/global) is no longer available1.
As the Principal Investigator (PI) of a project, you are responsible for providing enough storage to your project members, and to decide how files and directories should be stored within the project directory.
The day-to-day work of organizing data, discussing storage needs with NSC does not neccesarily have to be done by the PI. Please contact NSC Support if you want to delegate these tasks to someone else within your project.
snicquota) that you can run on the cluster that will report who is using how much of your project's disk space. Later we will make this information available in NSC Express. A notification system is in place that will email you when the project storage quota is exceeded (the emails can also be sent to all project members or a list of addresses if you prefer that).
Most projects seems to get along fine without limiting how much each user can store inside the project directory.
However, it is possible for one user to fill up the entire project storage directory and cause problems (e.g failed jobs) for other users.
If you find that you need more control over who gets to use how much storage space, we can place limits on individual users or groups of users within a certain project directory. If you're interested in using such limits, please contact NSC Support.
By default, only members of your project will be able to read and write files in the project directory. It is possible to allow others to e.g read files from the project directory or parts of it. Please contact NSC Support if you want to open up your project directory to non-members.
NSC's position is that computing time and project storage are allocated to the project by SNAC, and that SNAC has authorized the PI to decide who gets to be a member in the project, and how much computing and storage resources each member may use.
In order to manage the project storage, the project PI (or someone designated by the PI) can therefore get assistance from NSC with the following:
We strongly encourage PI:s to talk to project members before deleting or changing the ownership of their data.
Please note that NSC considers this to be unrelated to the intellectual property rights of the actual file contents. This just concerns the rights to store and organize bits and bytes on disk.
When a user is removed from a project, files in the project directory owned by that user are not automatically removed. It is up to the project PI to decide if the files should be kept on disk or not.
A user's home directory is considered to be personal and not connected to any project. NSC will not allow PI:s to delete or view contents from the home directory without permission from the user. Home directories of users no longer active at NSC will eventually be deleted.
If the default model of "one project directory per project" does not match your workflow (e.g if your research group has several SNAC projects that need to share the same data), please contact NSC Support to discuss your options for data storage.
It is possible both to split an a storage allocation into two or more smaller project directories, or merge the allocations of two or more projects into one larger project directory.
The following conditions must be met for a merge or split to be approved:
Exception: All users will have a small home directory for settings, small personal files etc. All large files and all files that should be shared with others should be put in the project storage directories under /proj.↩