Scratch File System Purge Policy
Warning
The $SCRATCH file system, as its name indicates, is a temporary storage space. Files that have not been accessed* in ten days are subject to purge.
Deliberately modifying file access time, using any method, tool, or program, for the purpose of circumventing purge policies is prohibited.
*The operating system updates a file's access time when that file is modified on a login or compute node. Reading or executing a file/script on a login node does not update the access time, but reading or executing on a compute node does update the access time. This approach helps us distinguish between routine management tasks (e.g. tar, scp) and production use. Use the command ls -ul to view access times.