[Lustre-discuss] Failover Setup MDS/MDT

[Heiko Schroeter]

Am Mittwoch, 25. Juni 2008 14:19:11 schrieb Brian J. Murrell:
> On Wed, 2008-06-25 at 07:36 +0200, Heiko Schroeter wrote:
> > How can one determine the size for the MDT partition or is that the same
> > as the MDS device ?
> > (As far as i can see the MDT takes the DIR info etc. So it should be
> > larger than the MDS.)
>
> An MDT is the device (i.e. the disk) that Lustre in an MDS (the server)
> uses to manage the metadata.  Maybe that clears it up?

Well yes ok, but what about the sizes of the partitions ?

The docs present an example calculating the inode space needed on an 'MDS'.
(3.2.2 Calculating MDS Size)

That what actually confuses me a bit.

So when the MDS partitions holds the inodes of the lustre system what will be 
the partition size of the MDT device ?
Or should it read 'MDT' partition size in the docs and the MDS partition size 
doesn't matter at all ?

Thanks and Regards
Heiko