X-Ray Scratch Disk Cleaning Policy
June 2005 - David Sierkowski (sierkows@purdue.edu)
About the Program
This program was created to enforce the temporary disk policy of the RAXIS
systems moe and curly. The disk space must be periodically purged in order
to allow people to collect data from the machines without issues.
The /moe-scratch and /curly-scratch directories are areas where temporary
data is stored. Once a collection of images has been written to these areas,
the owner has 30 days to move the data to another location before it is
automatically deleted.
How the System Works
On the 1st day of every month, a program runs that will delete data that is
30 days or older from the scratch disk on the moe and curly systems. There are
no backups of this data, and there will be no way to retrieve the data once it
has been deleted.
On the 15th and 22nd day of every month, a program runs that searches for data
that will be deleted at the beginning of the next month. It sends a warning
email to each owner who possesses data that fits this criteria. The email gives
them a list of the files that will be deleted at the beginning of the next
month.
Every user with data that is scheduled for deletion will be given two weeks
notice. This provides ample time to move data from the temporary disks to a
more permanent location.
Methods for Retrieving Data
The easiest method for getting the data from one of the moe/curly temporary
drives to your Windows PC is to use either WinSCP or SecureFX. Both programs
are available free of charge.
Moving data to your Linux system, you can either use the the command line
program 'sftp' or if you are on the Structural Biology network, the temporary
areas are accessible through NFS at /bio/moe-scratch and /bio/curly-scratch.
Start Date
- First scan for old data: July 15, 2005
- Second notices sent out: July 22, 2005
- First trash archive: August 1, 2005
- Second trash archive: September 1, 2005
- First trash deletion: October 1, 2005
Initially, during the first two months, the items will be placed in tar archives
and manually deleted.
After the first two months, starting October 2005, the files will be deleted
automatically.
