On Mon, 2021-04-05 at 13:55 -0500, Sage Weil wrote: > On Mon, Apr 5, 2021 at 1:33 PM Jeff Layton <jlayton@xxxxxxxxxx> wrote: > > > > On Thu, 2021-04-01 at 11:04 +0200, Dan van der Ster wrote: > > > If one kernel mounts the > > > same cephfs several times (with different prefixes), we observed that > > > this is a unique client session. But does the ceph module globally > > > share a single copy of cluster metadata, e.g. osdmaps, or is that all > > > duplicated per session? > > > > > > > One copy per-cluster client, which should generally be shared between > > mounts to the same cluster, provided that you're using similar-enough > > mount options for the kernel to do that. > > I suspect the problem is that if these are coming from mgr/volumes, > then each mount has a unique cephx user (and a client cap that locks > them into the exported directory), which means that the client > instances can't be shared. > Oof. You're probably right. In that case, you're sort of SoL since you really do have to have a different client if the creds are different. Still, it's hard to imagine that it's _that_ much overhead, even at 350 mounts, but I guess it depends on the amount of memory in the host. -- Jeff Layton <jlayton@xxxxxxxxxx> _______________________________________________ Dev mailing list -- dev@xxxxxxx To unsubscribe send an email to dev-leave@xxxxxxx
