[Lustre-discuss] MDT mount options (after upgrade 1.8.7 to 2.4.3)

[Mohr Jr, Richard Frank (Rick Mohr)]

On Jun 18, 2014, at 3:29 PM, Gretchen Zwart <zwart at astro.umass.edu>
 wrote:

> Did you do any renaming of OSTs (e.g. lctl --replace-nids)? Did you make any changes at all related to naming scheme?

No, we didn't make any changes.

> I see the following in the log files:
>    MDT using 1.8 OSC name scheme
>    For 1.8 interoperability, rename obd type from mds to mdt

I see that in my logs as well, but it doesn't seem to be causing any issues.

> For the client it is complaining about existing device:
>    Device lustre-OST0000-osc-ffff88022517bc00 already exists at 3, won't add

Sorry, I have not seen any messages like these on our clients.

> I don't think you mentioned if you set up a second MDT. I'm currently working off a copied MDT and may go back to using drbd/ha MDT. It was quite oversized...

No, I just have the one MDT for now.

-- 
Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences
http://www.nics.tennessee.edu