[ClusterLabs] Recovering after split-brain

[Digimer]

On 22/06/16 01:09 AM, Nikhil Utane wrote:
> We are not using virtual IP. There is a separate discovery mechanism
> between the server and client. The client will reach out to new server
> only if it is incommunicado with the old one.

That's fine, but it really doesn't change anything. Whether you're using
a shared IP, shared storage or something else, it's all the same to
pacemaker in the end.

> On Tue, Jun 21, 2016 at 8:27 PM, Dmitri Maziuk <dmitri.maziuk at gmail.com
> <mailto:dmitri.maziuk at gmail.com>> wrote:
> 
>     On 2016-06-20 17:19, Digimer wrote:
> 
>         Nikhil indicated that they could switch where traffic went up-stream
>         without issue, if I understood properly.
> 
> 
>     They have some interesting setup, but that notwithstanding: if split
>     brain happens some clients will connect to "old master" and some: to
>     "new master", dep. on arp update. If there's a shared resource
>     unavailable on one node, clients going there will error out. The
>     other ones will not. It will work for some clients.
> 
>     Cf. both nodes going into stonith deathmatch and killing each other:
>     the service now is not available for all clients. What I don't get
>     is the blanket assertion that this "more highly" available that
>     option #1.
> 
>     Dimitri
> 
> 
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-- 
Digimer
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