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- Temporary space (/tmp)
- /tmp on all RCI systems is mounted on a virtual RAM disk; /tmp
is the fastest disk space available to users.
- /tmp is local to each machine; files on one machine of the RCI
cluster will not be available to the other machines.
- This space should be used for short-lived files that are needed
only for the "run" of a single job.
- No backups are done on /tmp.
- Data in /tmp is cleared when the system reboots, and may be deleted
automatically after two days of inactivity.
- Scratch space (/rci/scratch)
- /rci/scratch is a medium term workspace.
- Data in this directory is available to all machines in the RCI
cluster.
- This space should be used for working data. Data in /rci/scratch
should be moved to home directories or optical disk when not in
active use.
- No backups are done on /rci/scratch.
- Data in /rci/scratch may be deleted automatically after ten days
of inactivity.
- User home directories (/rci/u1, /rci/u2, ...)
- Home directory disks are the primary workspace for users.
- Data on user disks is available to all machines in the RCI cluster.
- If you have more than your allocated disk quota, you should move
infrequently used data to the optical disk.
- Full backups are done weekly on this data. Also all data new or
changed since the last full backup is backed up daily.
- Files will not be automatically deleted from users' home directories
with the rare exception of "old" automatically generated files
(eg: core files and editor backup files) when disk space is limited.
- Optical disk archive (/rci/archive)
- /rci/archive is a long term "nearline" storage area. This diskspace
is managed by the amass hierarchical filesystem.
- The optical disk archive is shared among all RCI systems.
- The optical disk archive is intended to be a long term storage
area, and also storage for large datasets. Since this system uses
erasable technology, as opposed to read/write technology, users
should try to minimize the number of times that they recreate,
move, or alter data stored here.
- Full backups are done once every six months. Backups of all data
new or changed since the last full backup are done monthly. Backups
of all data new or changed since the last monthly backup will
be done weekly. NO daily backups will be done on this disk.
- Files will not be deleted from the optical disk archive.
- System disks (/, /var, /rci/mail, ...)
- This includes system support disks (eg: /, /var, /opt, ...) and
user support disks (eg: /rci/mail).
- System support disks are usually individual to each machine. Disk
with names beginning with "/rci" are common to all RCI systems.
- Use of these disks is automatic, and user initiated uses are for
specific purposes such as accessing applications or mail.
- System support disks on the RCI systems get backed up once a week.
User support directories get backed up daily in a manner similar
to user home directory disks.
- Files on system disks are deleted at the system administrator's
discretion, as appropriate.
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