CISE Storage Space Usage Guidelines and Policies

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Persistent Storage Space

  1. Home Directories
  2. Home disk space is the primary location where users can store files. These directories are maintained on high availability storage and snapshots of the data are made hourly, nightly and weekly. In addition, this disk space is backed up to off-line storage via CNS's TSM software, and further backed up remotely from there. Because of the level of redundancy provided, quotas on these directories are fairly small.

    Home directory space can be accessed from all CISE managed unix computers via /cise/homes/<username> , the '~' special path, and is the default directory that users are placed in when they log in.

    Home directory space can be accessed from all CISE managed windows machines via the H: drive.

  3. NT Profile Space
  4. NT profile space is a very small space for holding your various windows settings, as well as any custom Desktop and Start Menu items. The Desktop and My Documents folders point at this space as well, but due to its limited size and the fact that it is not maintained redundantly it is recommended that users DO NOT STORE ANY DATA IN THESE PLACES. Users should store all important documents in the home directory.

  5. Research Spacee
  6. Research space is space either purchased specifically by a professor or group, or provided from a relatively limited shared pool provided by the department. Access to these spaces is limited to individuals who have been granted access by whoever owns the space. Because the size and location of these spaces vary widely, the level of backup provided also varies, but the department works with each owner to provide some form of backup space in case of a system failure or user error.

    Research space is a good location to host custom software installs, development projects, shared research data, or other project associated data that is either too large to be stored in a user's home directory or requires shared access.

    Research spaces can be accessed from all CISE managed unix machines under the /cise/research<space number> directory, or via /cise/research/<space name>.

    Research Spaces can be accessed from all CISE managed windows machines via the Z: drive, at the same locations as on unix machines.

  7. Class Web Space
  8. Each course offered by the department is allocated space for web pages and other course files. This space is owned by the instructor of the course, and a group is automatically assigned to the course space each semester so that professors can grant TAs access to the course space. Course space is backed up in the same manner as home directories, and further archived for posterity.

    Class space is available from all CISE managed unix machines under the /cise/class/<course number><semester> directory. (Ex. /cise/class/cis3022fa09)

    Class sapce is available from all CISE managed windows machines via the Z: drive, at the same location as on the unix machines.

  9. Quotas
  10. The CISE department has four different types of quotas that apply to your account:

    NT Profile Quota's - This relates to the size of your Windows profile, you will mostly likely encounter over quota messages of this type when you go to log off Windows PC. More information on managing your NT Profile can be found here: NT Profile Information

    Home Directory Quota's - Your home directory is your main storage space. It is limited and should only be used to store work of value to your course work or research. If you are over quota you will most likely see an error when you go to save a file to your H: drive (Windows) or your home directory (UNIX) - incidentally - these are both the same space so you can move from one platform to another and still access your files. More informaton on managing your home directory can be found here: Monitoring Home Directory Usage

    Mail Quota's - It is important to closely watch the amount of email you have saved in your Maildirectory. You will receive an email when you get close to the quota for your Maildirectory - More information on mailquota's can be found here: Mail Quota

    Print Quota's - Each user has a maximum number of pages that they can print for free each month. After they have meet their quota, they will be charged a per page fee. More information on print quota's can be found here: Print Quotas

Temporary Storage Space

  1. Machine Local Temporary Space
  2. The /tmp and /var/tmp direcoties on each unix machine are typically user writeable. However, these spaces are automatically cleared on reboot, and can, in some cases, severly impact the functionality of the machine if filled. Files in these spaces are likely to dissapear without notice, and cannot be recovered.

  3. Individual Temporary Storage Space
  4. The /cise/tmp filesystem is available to individuals who need space to host larger amounts of files for a reasonable period of time. These files are not backed up, but are maintained on RAID storage, so the likelyhood of totally pool failure is small. The filesystem is rather large, and should accommodate all reasonable usage, but should it become necessary in the future, admins may impose a maximum size for directories within this filesystem.

    Starting in Fall 2009, this space will be rotated at the end of each semester, and the old shares made read only. The previous semester's temporary file space will become the new /cise/tmp.0 (again, as a read only filesystem), then /cise/tmp.1 the following semester, and eventually /cise/tmp.2 . After this, the files on the space will be purged, and the filesystem will be restored to writeable status again as /cise/tmp. Thus, information on these filesystems will remain nominally available for 3 semesters following its removal.

  5. Group Temporary Storage Space
  6. Groups working together on a project that needs additional storage space can request creation of a group, and the assignment of that group to a directory within the /cise/tmp filespace. Usage of this temp space follows exactly the same rules and restrictions as for Individual Temp Storage Space. If you need space to persist uninterrupted for longer than a semester, please fill out a project request.