[Openais] partition recovery question

Steven Dake sdake at redhat.com
Thu Oct 29 09:22:48 PDT 2009


On Thu, 2009-10-29 at 10:37 +0100, Dietmar Maurer wrote:
> Hi all,
> 
> The evs_overview man page says:
> 
> >Virtual Synchrony allows the current configuration to be used to make
> decisions in partitions
> >and merges. Since the configuration is sent in the stream of messages
> to the application, the
> >application can alter its behavior based upon the configuration
> changes.
> 
> Let's say I have the following configuration:
> 
> Node1: StateA
> Node2: StateA
> Node3: StateA
> 
> Then I get a configuration change - let's say Node3 leaves the system.
> 
> Is it safe to assume that Node1 and Node2 are still in StateA?
> 

yes

> And what is the difference between EVS and CPG?
> 

EVS is a passthrough without process id membership.  cpg provides
process group membership meaning that both node id and process id
information is given for membership information.

Regards
-steve

> - Dietmar
> 



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