Scott, What is preventing the clients from being shut down? Unable to unmount the file system? If that is the case, please try "umount -f" instead of umount. This will result in an unclean unmount, but the client *will* be able to unmount Lustre. If other, please advise.
Regarding the order of shutdown, I've been advocating: Clients MDT OSTs As the MDS is a client of the OSTs (the MDS runs an OSC for each OST). However, using this method has seemingly triggered the recovery process on targets when bringing up the file system. I understand that in version 2.4, OSSs will need to communicate with the MDSs, seemingly creating a two way dependency (possibly my confusion on the matter, but clarification here is requested ). However, as you are using 1.8.7, this latter point should not cause you any problems. -- Brett Lee Sr. Systems Engineer Intel High Performance Data Division > -----Original Message----- > From: [email protected] [mailto:lustre-discuss- > [email protected]] On Behalf Of K. Scott Rowe > Sent: Tuesday, October 22, 2013 8:51 AM > To: [email protected] > Subject: [Lustre-discuss] Proper shutdown sans clients > > > We use Lustre 1.8.7. Our environment has many Lustre clients spread out > accross several networks. When an emergency happes, like a power outage, > where we need to quickly shutdown the Lustre servers we frequently are > unable to shutdown the clients first. I know that the documentation > recommends shutting down Lustre in this order: > > unmount clients > unmount MDT > unmount OSTs > > So my question is, what would the recommended procedure be if one cannot > shutdown all the clients first? Would it just be > > unmount MDT > unmount OSTs > > Or is there something else that should be done because we cannot get the > clients shutdown first? > > -- > K. Scott Rowe -- Linux Grouop Lead > Array Operations Center, National Radio Astronomy Observatory > [email protected] -- http://www.aoc.nrao.edu/~krowe/ > 1.575.835.7000 -- 1003 Lopezville Socorro, NM 87801 > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
