[Lustre-discuss] Renaming an existing lustre filesystem

[Wojciech Turek]

Yes --reformat option is not very reassuring. However I dug out some three
years old notes (this is when I have rename file system last time) and they
have the same option and this was done on one of the production FS but of
course always best to test it on small loop dev Lustre FS.


On 2 March 2011 00:53, James Robnett <jrobnett at aoc.nrao.edu> wrote:

>
>   Thanks for the reply.  I saw the "Restoring the File system from a
> snapshot" docs and its reference to --reformat.  It wasn't clear from
> the context whether that was destructive.
>
>   Anyway I'll give that a shot.  Looks like I was doing the right
> thing modulo the ldiskfs step and deleting last_rcvd. This is our
> test system so if I goof it's only annoying to me.
>
> James
>
> > Actually one correction to my earlier post you need to use --reformat
> > option
> > with tunefs.lustre like this:
> >
> > tunefs.lustre --reformat --fsname=<fsname> --writeconf
> > /dev/<block_device_name>
> >
> > This is safe and no data will be lost, --reformat is just to force the
> > fsname change
> >
> > BTW the rename procedure is in the manual but hidden under the "Restoring
> > the File System From a Snapshot" chapter
> >
> > Cheers
> >
> > Wojciech
> >
>
>


-- 
Wojciech Turek

Senior System Architect

High Performance Computing Service
University of Cambridge
Email: wjt27 at cam.ac.uk
Tel: (+)44 1223 763517
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