Reminder - IMPORTANT Changes to Scratch Storage

Posted on June 24, 2020 (Last modified on October 19, 2023) • 1 min read • 209 words

Dear JASMIN users,

Please note the following changes that affect the /work/scratch
We have previously announced that the new scratch volume /work/scratch-pw is available. This volume is on PFS (parallel file system) storage with a total capacity of 1 Petabyte, but has automated processes in place to “police” usage. The old volume, /work/scratch will be available for READ access only from this Friday 26th June until 31st July. Please do not run batch jobs that write to /work/scratch as your job will fail.

Note: /work/scratch will be retired after the 31st July.

As always with scratch storage, any important data should be moved away to other storage if it is to be kept for any length of time. The primary purpose of scratch storage is for intermediate storage for batch processing jobs on LOTUS. To “police” this, and to preserve the availability of scratch space for all LOTUS users, automated processes will be run at weekly intervals to purge all data older than 28 days.

We are also taking this opportunity to remind users of the naming convention ‘pw’ and ‘nopw’ to help distinguish between “parallel write” (pw) and “no parallel write” (nopw) capabilities of these volumes. See also
https://help.jasmin.ac.uk/article/4700-understanding-new-jasmin-storage

Thank you in advance for your cooperation.

JASMIN Team