Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-26 Thread Raoul Bhatia [IPAX]
On 10/22/2009 09:48 AM, Steven Dake wrote: > ftp://ftp% > 40corosync.org:downlo...@corosync.org/presentations/corosync-roadmap.pdf unfortunately, this url is not working for me. cheers, raoul -- DI (FH) Raoul Bhatia M.Sc.

Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-22 Thread Steven Dake
On Thu, 2009-10-22 at 08:18 +0200, Florian Haas wrote: > Steve, > > what has repeatedly come up is that RRP links don't auto-heal (see > thread: > http://oss.clusterlabs.org/pipermail/pacemaker/2009-May/001784.html), > and that passive mode RRP seems to not work at all (see thread: > https://lists

Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-22 Thread Florian Haas
On 10/22/2009 08:40 AM, Romain CHANU wrote: > Florian, I have checked the different links you have sent and I am a bit > confused with this RRP matter. > > I want to use two machines (primary / secondary) and set up the > following interfaces: > > - eth0 : direct link between primary and secondar

Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-21 Thread Romain CHANU
Florian, I have checked the different links you have sent and I am a bit confused with this RRP matter. I want to use two machines (primary / secondary) and set up the following interfaces: - eth0 : direct link between primary and secondary - bond0: bonding of eth1 and eth2 (redundant network wit

Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-21 Thread Florian Haas
Steve, what has repeatedly come up is that RRP links don't auto-heal (see thread: http://oss.clusterlabs.org/pipermail/pacemaker/2009-May/001784.html), and that passive mode RRP seems to not work at all (see thread: https://lists.linux-foundation.org/pipermail/openais/2009-October/013095.html -- t

Re: [Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-21 Thread Steven Dake
You can run with one NIC (and switch) but then your NIC and switch become a SPOF (single point of failure). Vehicles have a spare tire for a reason :) If a NIC fails it may be ok to switch a service to a different node. If a switch fails, The entire cluster becomes disabled until the switch retu

[Pacemaker] Pacemaker cluster: OpenAis communication channels

2009-10-21 Thread Romain CHANU
Hi, I am reading the user's guide for DRBD and there is something I want to clarify about Pacemaker. In Chapter 8 ("Integrating DRBD with Pacemaker clusters"), section 8.1.4 "OpenAis communication channels", it is said that "the absolute minimum requirement for stable cluster operation is two ind