[Lustre-discuss] MDT and MGS

[Nico Budewitz]

Hi,

first of all I have 140TB lustre installation, running over infiniband  
without any problems. It's working great! But I have one small  
question about the MGS service.

It's not clear to me which informations/configurations are stored by  
the MGS.


I have two MDT's created on the MDS with the command

1. with MGS
mkfs.lustre --mdt --mgs --fsname=aeifs1... /dev/drbd0
MGS and MDT are sharing one partition

2. without MGS
mkfs.lustre --mdt --fsname=aeifs2... /dev/drbd1
MDT on a separate partition


What could happen if I reformat
mkfs.lustre --mdt --mgs --fsname=aeifs1... /dev/drbd0?

Is there any influence to the second MDT by reformat the first MDT  
with --mgs option?

I am using lustre 1.6.4.3.

"la lykken gro, som gresset bak do"

Nico Budewitz
HPC-Cluster Administrator
Max-Planck-Institute for Gravitational Physics / Albert-Einstein- 
Institute
Am Muehlenberg 1, 14476 Golm
Tel.: +49 (0)331 567 7364 Fax: +49 (0)331 567 7297
http://supercomputers.aei.mpg.de