[Lustre-discuss] Resizing OSTs?

[Brian J. Murrell]

On Tue, 2010-11-09 at 14:06 +0100, Roy Dragseth wrote: 
> 
> It would be nice to make use of the extra volume and I'm wondering if we can 
> just take down the OST, extend the logical partition on the array, run 
> resize2fs on the filesystem and be good to go?  Will the MDT just pick up the 
> new OST size automatically?

There is another ongoing thread that you should be paying attention to
under the subject "questions about an OST content".  I think it more
than answers these questions but for the resizing.

As for resizing, as far I understand, it is something that should work,
but we don't test it -- _at_all_.  If you have enough OSTs that you need
to do this with, it might be worth your while investing in backing one
up and resizing it to see if it works.  Of course, you can use your
backup to verify the operation.  If you do this, please report your
findings here.

But also, if you have the space to back one up (per the above) you could
simply use the information in the other thread I mentioned to go through
your OSTs rebuilding them one by one on the larger disks, utilizing all
of the space when you do the initial formatting of them.

b.

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