[Lustre-discuss] Multiple MDTs with Lustre 1.6?

[Klaus Steden]

Hello,

I am working on incorporating failover and high availability functionality
with Lustre into one of our new research clusters.

I am also a bit of a lazy sysadmin, and prefer to not have to modify much on
a day-to-day basis. I am using the ROCKS cluster framework in conjunction
with Lustre, so a good deal of the work is handled in an automated fashion.

I have a question, though ...

I have redundant MDS/MDT servers, and when generating their /etc/fstab
files, I have them both list the MDT volume under their mounted drives (so
that they both mount the metadata volume). Being a bit of a neophyte, I¹m
not sure if this is the right thing to do. Is this going to cause a problem
in future? What are the possible consequences of both hosts mounting the
same metadata volume simultaneously? How do the OSTs handle this situation?

thanks,
Klaus
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