[gpfsug-discuss] quickest way to delete all files (and directories) in a file system

Olaf Weiser olaf.weiser at de.ibm.com
Thu Jun 30 13:05:33 BST 2022


Hi Tina,
I think its much faster to recreate the file system
after that .. it is enough to     do

mmauth grant  {RemoteClusterName | all} -f {Device

in my case ..its always ... grant all -f all 😉

and every remote mount will  work  as before.. the remote cluster key information is in the cluster CCR  .. not in the filesystem..

Pay attention.. when you 'll create the file system, it will be created with the current code's version... in Case remote cluster is backlevel.. don't forget to specify --version

have fun 😉




________________________________
Von: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org> im Auftrag von Tina Friedrich <tina.friedrich at it.ox.ac.uk>
Gesendet: Donnerstag, 30. Juni 2022 13:31
An: 'gpfsug main discussion list' <gpfsug-discuss at spectrumscale.org>
Betreff: [EXTERNAL] [gpfsug-discuss] quickest way to delete all files (and directories) in a file system

Hello everyone,

this should be a simple question, but we can't quite figure out how to
best proceed.

We have some file systems that we want to, basically, empty out. As in
remove all files and directories currently on them. Both contain a
pretty large number of files/directories (something like 50,000,000,
with sometimes silly characters in the file names). 'rm -rf' clearly
isn't the way to go forward.

We've come up with either 'mmapplypolicy' (i.e. a policy to remove all
files) or removing and re-creating the file systems as options (open to
other suggestions!).

We want the file systems still; ideally without having to redo the
authentication and key swaps etc for the 'remote' clusters using them.

This is a Lenovo DSS, but I don't think it makes much of a difference.

So - what's the best way to proceed?

If it is mmapplypolicy - does anyone have a (tested/known working)
example of a policy to simply remove all files?

Thanks,
Tina

--
Tina Friedrich, Advanced Research Computing Snr HPC Systems Administrator

Research Computing and Support Services
IT Services, University of Oxford
http://www.arc.ox.ac.uk  http://www.it.ox.ac.uk

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