[Linux-cluster] Question about openais rrp_mode

Alain.Moulle Alain.Moulle at bull.net
Wed Dec 16 13:53:27 UTC 2009

> man openais.conf : rrp_mode
>               This specifies the mode of redundant ring, which may  
> be  none,
>               active,  or  passive.  Active replication offers 
> slightly lower
>               latency from transmit to delivery in  faulty  network  
> environ-
>               ments  but  with  less  performance.   Passive  
> replication may
>               nearly double the speed of the totem protocol if  the  
> protocol
>               doesn't  become  cpu bound.
Not completely clear for me:  does that mean that "active mode" makes it
send the totems systematically on both networks, and "passive mode" makes
it send on the first interface ringnumber (in openais.conf) and only on
the second interface rignnumber if the first is broken ?
Could someone give more precise information ?
or where can I find more information about this ?

And by the way, is there any issue to use to set a first interface 
on Ethernet (eth0) and a second on IP/Infiniband ?

Thanks for your response.
Alain Moullé

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