Unfortunately, it looks like the exact error text has already rolled off my logs. Earlier today something jammed up and I restarted ceph, which returned everything to a healthy state. But I'll take that as an indicator that ceph isn't a good match for sleeper systems. Fortunately, ganesha NFS is now working properly for me since I upgraded Octopus to Pacific and I no longer feel the need for a direct mount. NFS has had to deal with hibernation for years, so I think I can depend on it to deal with it one way or the other. Tim On Tue, 2024-02-06 at 13:00 -0500, Patrick Donnelly wrote: > On Tue, Feb 6, 2024 at 12:09 PM Tim Holloway <timh@xxxxxxxxxxxxx> > wrote: > > > > Back when I was battline Octopus, I had problems getting ganesha's > > NFS > > to work reliably. I resolved this by doing a direct (ceph) mount on > > my > > desktop machine instead of an NFS mount. > > > > I've since been plagued by ceph "laggy OSD" complaints that appear > > to > > be due to a non-responsive client and I'm suspecting that the > > client in > > question is the desktop machine when it's suspended while the ceph > > mount is in effect. > > You should not see "laggy OSD" messages due to a client becoming > unresponsive. > > > So the question is: Should ceph native mounts be used on general > > client > > machines which may hibernate or otherwise go offline? > > The mounts will eventually be evicted (generally) by the MDS if the > machine hibernates/suspends. There are mechanisms for the mount to > recover (see "recover_session" in the mount.ceph man page). Any > dirty > data would be lost. > > As for whether you should have clients that hibernate, it's not > ideal. > It could conceivably create problems if client machines hibernate > longer than the blocklist duration (after eviction by the MDS). > > -- > Patrick Donnelly, Ph.D. > He / Him / His > Red Hat Partner Engineer > IBM, Inc. > GPG: 19F28A586F808C2402351B93C3301A3E258DD79D > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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