Linux HA / cluster: what are the differences between Pacemaker, Heartbeat, Corosync, wackamole?

Posted by Continuation on Stack Overflow See other posts from Stack Overflow or by Continuation
Published on 2010-05-17T03:08:05Z Indexed on 2010/05/17 3:10 UTC
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high-availability

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heartbeat

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cluster

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linux

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relia

Can you help me understand Linux HA?

Pacemaker, Heartbeat, Corosync seem to be part of a whole HA stack, but how do they fit together?
How does wackamole differ from Pacemaker/Heartbeat/Corosync? I've seen opinions that wackamole is better than Heartbeat because it's peer-based. Is that valid?
The last release of wackamole was 2.5 years ago. Is it still being maintained or active?
What would you recommend for HA setup for web/application/database servers?

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