Hi,
How will look my tunefs.lustre command line if I would like to
configure failnode for my MDS. I have two MDT's and MGS is on the
same block device that one of MDT's ? I have also two servers
connected to share matadata storage.
Thanks,
Wojciech
On 12 Nov 2007, at 20:49, Nathan Rutman wrote:
Robert LeBlanc wrote:
Ok, I feel really stupid. I've done this before without any
problem, but I
can't seem to get it to work and I can't find my notes from the
last time I
did it. We have separate MGS and MDTs. I can't seem to get our MGS to
failover correctly after reformatting it.
mkfs.lustre --mkfsoptions="-O dir_index" --reformat --mgs
[EMAIL PROTECTED] /dev/mapper/ldiskc-part1
The MGS doesn't actually use the --failnode option (although it won't
hurt). You actually have to tell the other nodes
in the system (servers and clients) about the failover options for the
MGS (use the --mgsnode parameter on servers, and mount address for
clients). The reason is because the servers must contact the MGS for
the configuration information, and they can't ask the MGS where its
failover partner is if e.g. the failover partner is the one that's
running.
We are running this on Debian, using the Lustre 1.6.3 debs from
svn on Lenny
with 2.6.22.12. I've tried several permutations of the mkfs.lustre
command,
specifing both nodes as failover, and both nodes as MGS and pretty
much
every other combination of the above. With the above command
tunefs.lustre
shows that failnode and mgsnode are the failover node.
Thanks,
Robert
Robert LeBlanc
College of Life Sciences Computer Support
Brigham Young University
[EMAIL PROTECTED]
(801)422-1882
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Mr Wojciech Turek
Assistant System Manager
University of Cambridge
High Performance Computing service
email: [EMAIL PROTECTED]
tel. +441223763517
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