After holding up for a long time, we're implementing a new expiration policy for all files stored in $SCRATCH and $PI_SCRATCH on Sherlock.

Starting October 1st 2017, all files in $SCRATCH and $PI_SCRATCH that have not been modified during the last 6 months will be automatically deleted.

NB: /scratch owners (ie. PI groups having purchased their own portion of the /scratch filesystem) will be exempted and their files will never expire nor be deleted.

Please refer to the official documentation for more details.