Scratch

Scratch data is short-term data you are currently working on and will not need once results have been created, or data that is large and easily recreated or copied from its original source.

autoScratch - Auto Deleting Scratch Space

/data/autoScratch stores files that you only wish to keep for a limited period.

There are two directories for every user, each has a different policy described below.

Important Note

autoScratch data is not backed up and any important data should be moved to other locations as quickly as possible. Data stored here will be automatically deleted. An email is sent to you shortly before this occurs.

Weekly

autoScratch weekly is held in /data/autoScratch/weekly/abc123 and deleted 14 days after the last modification time.

A default quota of 5TB or 3million files is applied to each user. Current usage can be checked with the qmquota command.

If you have any files which have not been modified for 10 days, you will receive a daily email listing the files due for deletion, until the files are automatically deleted, modified or moved to your home directory or group share. Only the first 100 files are shown in the email, with the remainder listed in /data/autoScratch/weekly/$USER/autoScratch-Expiring

Monthly

autoScratch monthly is held in /data/autoScratch/monthly/username and deleted 90 days after the last modification time.

A default quota of 1TB or 3million files is applied to each user.

If you have any files which have not been modified for 80 days, you will receive a daily email listing the files due for deletion, until the files are automatically deleted, modified or moved to your home directory or group share. Only the first 100 files are shown in the email, with the remainder listed in /data/autoScratch/monthly/$USER/autoScratch-Expiring

Note

Please do not abuse this service by modifying timestamps of your files to make this a permanent location as it is unfair to other users. Moving files from weekly to monthly is preferred.

Legacy Scratch

Temporary Storage is available under /data/scratch/abc123, however this is not backed up. Each user has 300GB of scratch space which is not cleared automatically. If your scratch data is not cleared regularly, it will fill up with old files.

Important Note

Legacy scratch storage is being phased out in favour of autoScratch