[Lustre-discuss] MDT raid parameters, multiple MGSes

[Andreas Dilger]

On 2011-01-27, at 08:26, Jason Rappleye wrote:
> On Jan 27, 2011, at 3:15 AM, Andreas Dilger wrote:
>> 
>> The problem is that the client will only connect to a single MGS for configuration updates (in particular, the MGS for the last filesystem that was mounted).  If there is a configuration change (e.g. lctl conf_param, or adding a new OST) on one of the other filesystems, then the client will not be notified of this change because it is no longer connected to the MGS for that filesystem.
>> 
>> Granted, it is possible that someone fixed this when I wasn't paying attention.
> 
> I thought this sounded familiar - have a look at bz 20299. Multiple MGCs on a client are ok; multiple MGSes on a single server are not.

Sigh, it was even me who filed the bug...  Seems that bit of information was evicted from my memory.  Thanks for setting me straight.

Cheers, Andreas
--
Andreas Dilger 
Principal Engineer
Whamcloud, Inc.