Thanks Gregory. This is basically just trying to understand the behavior of the system in a failure scenario . Ideally we would track and fix mons going down promptly .
In an ideal world where nothing else fails and there cephx is not in use but mons are down , what happens if the osd pings to mons time-out ? Would that start resulting in I/O failures ? On Mon, Mar 5, 2018 at 9:44 PM Gregory Farnum <gfar...@redhat.com> wrote: > On Sun, Mar 4, 2018 at 12:02 AM Mayank Kumar <krmaya...@gmail.com> wrote: > >> Ceph Users, >> >> My question is if all mons are down(i know its a terrible situation to >> be), does an existing rbd volume which is mapped to a host and being >> used(read/written to) continues to work? >> >> I understand that it wont get notifications about osdmap, etc, but >> assuming nothing fails, does the read/write ios on the exsiting rbd volume >> continue to work or that would start failing ? >> > > Clients will continue to function if there are transient monitor issues, > but you can't rely on them continuing in a long-term failure scenario. > Eventually *something* will hit a timeout, whether that's an OSD on its > pings, or some kind of key rotation for cephx, or.... >
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