[Lustre-discuss] Size of MGT?

[Andreas Dilger]

On 2009-11-17, at 01:46, Geoff Lustre wrote:
> In the case where a the MDS and MGS are configured separately, what  
> size does the MGT have to be?  Reason would suggest it could be  
> quite small, say 32MB.  What would be a sensible minimum? Are there  
> factors which would indicate a move away from the minimum? For  
> example if it is planned to configure 2000 lustre filesystems, or  
> the filesystem will consists of 20 000 servers.
>
> In short, are there guidelines for suggesting MGT size?


Please search the recent list archives for a discussion of this.

AFAIR, ORNL has an MGT data of about 128MB, but that is the largest
filesystem in the world.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.