On 2008-09-04T09:06:11, Paul Walsh <[EMAIL PROTECTED]> wrote:

> I think there's been a certain amount of confusion with regards to Heartbeat 
> and Pacemaker (and their versions), so I
> wonder if those involved (Lars, Andrew, Alan?) would clarify the following 
> assumptions:
> 
> Pacemaker 0.6.x can be used as a replacement for the CRM in heartbeat 2.1.3 
> (but NOT 2.1.4)?

No, not with 2.1.3 "plain"; Andrew had a repackaged version of hb-2.1.3
which works with Pacemaker.

> In future, both Heartbeat AND Pacemaker will be required to provide
> the functional equivalent (broadly speaking) of 2.1.3 with its CRM, as
> Heartbeat itself won't have a CRM?

Exactly. 2.99.x is a preview of a 3.0 release of heartbeat which has
Pacemaker/crm removed, and thus doesn't overlap with Pacemaker, and thus
can be installed along with pacemaker directly.

> Pacemaker's NOT a fork or replacement for Heartbeat.

Exactly. Pacemaker is a split of code from heartbeat.

> If I understand correctly, Pacemaker is so named because it's required
> for Heartbeat to work in much the same as a pacemaker is required to
> maintain a stable heart rhythm?

Well, heartbeat doesn't require pacemaker. Pacemaker doesn't require
heartbeat (it can also run on openAIS). But yes, they can cooperate.

> I think it might be worth highlighting the incompatibility between
> Pacemaker and 2.1.4 (and *why*) on the Wiki page
> http://www.clusterlabs.org/mw/Install

I've since given up trying to explain it; every possible explanation has
been misinterpreted by some ;-)

Regards,
    Lars

-- 
Teamlead Kernel, SuSE Labs, Research and Development
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde

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