On the whole, I prefer to use NFS for my clients to use Ceph filesystem. It has the advantage that NFS client/mount is practically guaranteed to be pre-installed on all my client systems. On the other hand, there are downsides. NFS (Ceph/NFS-Ganesha) has been known to be cranky on my network when it comes to serving resources on occasion, and should the NFS host go down, the NFS client cannot fallback to the alternate NFS host without assistance. Which I should probably add, since I run keepalive anyway, but that's another matter. My issue, then is that if I do a native/FUSE mount of Ceph FS on my desktop it hurts Ceph. The desktop hibernates when not in use and that causes the network communications between it and the Ceph servers to break until it wakes up again. In the mean time, I get "laggy OSD" errors. In extreme cases, where the desktop doesn't wake up clean and requires a hardware reset, I think it even ends up with orphan connections, since at one point I recall having to forcible terminate close to 20 connections. Ideally, then, since systemd is handling hibernation, there should be a hook in the Ceph client to ensure it and the Ceph servers are at peace with each other while it's down. Probably better reporting on the Ceph admin side as to the hostnames of clients with connection issues, but that's just icing. Tim _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |