On Thu, Sep 10, 2009 at 8:33 PM, Lars Ellenberg <lars.ellenb...@linbit.com>wrote:
> On Wed, Sep 09, 2009 at 10:51:26PM +0300, George Negoita wrote: > > Hello! > > > > On Wed, Sep 9, 2009 at 11:12 AM, <devaraja.soma...@wipro.com> wrote: > > > > > > > > Hi, > > > > > > I am trying to build HA setup with DRBD+Hearbeat+pacemaker for MySQL > > > database. > > > > > > Can you pls let me know whether these versions are stable and > compatible.I > > > tried building setup for resource level monitoring with this,but > confused > > > while creating crm clusters. > > > > > > > AFAIK, Heartbeat is more or less unmaintained. You should switch to > OpenAIS. > > ( > > > http://www.clusterlabs.org/wiki/FAQ#Which_Messaging_Layer_Should_I_Choose.3F > > ) > > which does not mean it is not stable. the cluster communication layer > of heartbeat, which is the only layer used by crm, is in some ways still > superior than what certain versions of OpenAIS can do now. > I don't doubt it's stable, but, when I have to setup a couple of servers (which should stay in production for quite a few years), I feel a little unconfortable knowing one of the base modules is considered unmaintained and obsolete... "Since the intial stable release of OpenAIS/Pacemaker, Heartbeat 2 can be considered obsolete and Pacemaker should be used instead." - quote from drbd manual "The Heartbeat project has been effectively unmaintained for several years (with the exception of the OCF resource agents)" - quote from Pacemaker's FAQ ...those are the main two opinions which influenced me to switch to OpenAIS. > Correct me if I'm wrong, but OpenAIS cannot do unicast, it can > apparently still not do multiple rings reliably, or recover > automatically from a broken ring, once the link works again. > OpenAIS also doesn't offer a serial communication like heartbeat. Yes, those versions are OK, though of course pacemaker 1.0.5 is there, > and drbd 8.3.3rc2 is there already as well. > > Maybe the problem should be described a bit (better)? > > > I think this is a very good place to start: > > http://www.drbd.org/users-guide-emb/ch-pacemaker.html > > then, http://www.clusterlabs.org/wiki/Documentation > > Thanks for advertising us ;) > It's because you deserve it. IMHO, drbd is one of the best documented projects I know. -- George Negoita System Administrator iMedia Plus Group
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