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

[Cameron Harr]

If you have MPI infrastructure set up already on some clients, 'drm' 
from the MPI File Utils can delete them fairly quickly (e.g. with 256 procs)

https://github.com/hpc/mpifileutils

On 6/30/22 4:31 AM, Tina Friedrich wrote:
> 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
>