With the latest beta (b7), there are proc files on the MGS showing:
1. all known filesystems
# cat /proc/fs/lustre/mgs/MGS/filesystems
testfs
lustre
2. for each filesystem with at least one running server, the server
names that participate in that filesystem
# cat /proc/fs/lustre/mgs/MGS/live/testfs
fsname: testfs
flags: 0x0 gen: 4
testfs-MDT0000
# cat /proc/fs/lustre/mgs/MGS/live/lustre
fsname: lustre
flags: 0x0 gen: 16
lustre-MDT0000
lustre-OST0000
For future reference, all servers are named <fsname>-<MDT|OST><XXXX>
This can be show for live servers under /proc/fs/lustre/devices,
or from the device label at any time:
# e2label /dev/sda
lustre-MDT0000
Makia Minich wrote:
Scenario: You setup a lustre filesystem (1.6 based) a month ago and things
work just fine, so you forget about it and lose your notes on it. Time
passes, you need to reboot and remount, but can't remember what the actual
<filesystem> to mount.
So, other than the obvious "write it down when you make it" answer, is there a
more inherent way to find the mount? After some digging, it was suggested
(thanks Cliff) to look in /proc/fs/lustre/mds (on the mds), which resulted in
the cryptic:
$ ls /proc/fs/lustre/mds
lustre-MDT0000 num_refs
$
On the off chance that was the answer, trial and error (an old friend) wound
up showing that "lustre" (without the "-MDT0000") is the actual filesystem to
mount. I don't think I'd have guessed that without help, so I'm seeking
another solution (or at least a few steps that seem better thought out).
It'd be nice if there was an equivalent "showmount -e <lustre>".
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