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 <> wrote:

> On Sun, Mar 4, 2018 at 12:02 AM Mayank Kumar <> 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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