[Lustre-discuss] Shutdown procedure

[Enrico Morelli]

Dear all,

which is the correct sequence for a MDT/MGS server shutdown?

Because, when I have to shutdown the server, first I try to umount the
lustreFS on all client and after I reboot the server. But the client
keeps a lot of time to umount the filesystem, more than 20 minutes.
(I 'don't know if is an involved parameter, but
my /proc/sys/lustre/timeout is 100)

Moreover, if during the client umounting  I have to poweroff the server,
after the server power up, I'm unable to remount lustreFS on the
clients without reboot each client, because if I try to enter in the
lustreFS directory I receive 

lustre cannot change directory to /lustre_homes/: Cannot send
after transport endpoint shutdown

If I try to mount it, the system tell me that the filesystem is already
mounted. If I try to umount the filesystem, the system tell me that the
device is busy.

I think to wrong something.
I'm using lustre 1.6.5 on ScientificLinux 4.7.

Some hints?

Thanks in advance
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|     ENRICO MORELLI         |  email: morelli at CERM.UNIFI.IT       |
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