On Jun 5, 2020, at 08:37, William D. Colburn 
<wcolb...@nrao.edu<mailto:wcolb...@nrao.edu>> wrote:

I was looking in /proc/fs/lustre/mgs/MGS/exports/, and I see ip
addresses in there that don't go anywhere anymore.  I'm pretty sure they
are gone so long that they predate the uptime of the mds.  Does a lost
client linger forever, or am I just wrong about when the machines went
offline in relation to the uptime of the MDS?

These files in the exports directory are just old stats, which are kept after 
client disconnect because it is otherwise difficult to track if clients are 
only connecting for a short time.  This doesn't mean that these clients are 
actively connected or part of the filesystem.

Cheers, Andreas
--
Andreas Dilger
Principal Lustre Architect
Whamcloud






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