[Pacemaker] ipaddr2 & clusterip doubts.

[Michael Schwartzkopff]

On Thursday 17 February 2011 14:47:33 Carlos G Mendioroz wrote:
> Brett Delle Grazie @ 17/02/2011 10:24 -0300 dixit:
> > Hi,
> > 
> > On 17 February 2011 12:58, Carlos G Mendioroz <tron at huapi.ba.ar> wrote:
> >> Hi,
> >> I've found that ipaddr2 can use clusterip when running as clone.
> >> (please correct me if I use some word in a not correct way,
> >> denoting I fail to get some concept)
> >> 
> >> But my understanding is that clusterip might be beneficial also
> >> in the active/standby case because of its use of a single mac
> >> address.
> > 
> > Not really - its simpler (networking wise) and safer to use floating
> > IP addresses for standard HA.  Otherwise all traffic is being
> > duplicated to both nodes which ties up bandwidth unnecessarily -
> > that's the major
> > downside to ClusterIP.
> 
> I guess it's a design issue, so it depends.
> I've seen the bandwidth argument, but this applies only to, in my case,
> to requests going to a server. BW is very low in this direction.
> I'm trying to get a fast failover (subsecond). I don't like gratuitous
> ARP that much.

Use a real loadbalancer if you want to make both servers active. See: 
www.linuxvirtualserver.org.

Greetings,
-- 
Dr. Michael Schwartzkopff
Guardinistr. 63
81375 München

Tel: (0163) 172 50 98
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