Hello,
I have a questions with respect to RADOS and RBD and the cluster monitor
daemons.
1) Is there any chance that the cluster monitor protocol will be enhanced to
work practically with only 2 monitor daemons? I ask since this seems like it
would allow a 2 node RBD based device to effective
Martin Fick wrote:
> Hello,
>
> I have a questions with respect to RADOS and RBD and the cluster monitor
> daemons.
I'm not one of the developers, but I've been following for a while and one
of your sub-questions intriqued me; specifically:
>...This would open up the use of RBD devices for lin
Replying to a response that was off-list:
On Wed, May 5, 2010 at 9:02 AM, Martin Fick wrote:
>
> --- On Wed, 5/5/10, Alex Elsayed wrote:
>
> > >...This would open up the use of RBD devices for linux
> > > containers or linux vservers which could run on any
> > > machine in a cluster (similar to
On Tue, May 4, 2010 at 4:46 PM, Martin Fick wrote:
> Hello,
Hi!
>
> I have a questions with respect to RADOS and RBD and the cluster monitor
> daemons.
>
> 1) Is there any chance that the cluster monitor protocol will be enhanced to
> work practically with only 2 monitor daemons? I ask since
On Wed, May 5, 2010 at 1:02 PM, Alex Elsayed wrote:
> Replying to a response that was off-list:
>
> On Wed, May 5, 2010 at 9:02 AM, Martin Fick wrote:
>>
>> --- On Wed, 5/5/10, Alex Elsayed wrote:
>>
>> > >...This would open up the use of RBD devices for linux
>> > > containers or linux vservers
--- On Wed, 5/5/10, Yehuda Sadeh Weinraub wrote:
> The problem is that the ceph monitors require a quorum in
> order to decide on the cluster state. The way the system
> works right now, a 2-way monitor setup would be less stable
> than a system with a single monitor since it wouldn't work
> whe
--- On Wed, 5/5/10, Alex Elsayed wrote:
Sorry about the accidental off-list reply, thanks
for replying on list...
> I would recommend benchmarking to have empirical results
> rather than going with my presumptions,
Or my presumptions, :) agreed.
> but in Ceph the metadata servers cache the
>> There is a heartbeat mechanism withing the mon cluster, and it's being
>> used for the monitors to keep track of their peer status. It might be a
>> good idea to add different configurable types of heartbeats.
>
> Yes, specifically, I meant by using some of the techniques that the
> heartbeat
