Looking for current and maintained information and documentation on (Linux ) Open Source High Availability HA Clustering?
You probably should be reading the Pacemaker site clusterlabs.org
This site conserves Heartbeat specific stuff. See Site news for details.


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The Linux-HA project is a widely used and important component in many interesting High Availability solutions, and ranks as among the best HA software packages for any platform. We estimate that we currently have more than thirty thousand installations up in mission-critical uses in the real world since 1999. Interest in this project continues to grow. These web pages are average nearly 20000 hits per day, and we see more than 100 downloads of Heartbeat per day.

Heartbeat now ships as part of SUSE Linux, Mandriva Linux, Debian GNU/Linux, Ubuntu Linux, Red Flag Linux, and Gentoo Linux. Ultra Monkey, and several company's embedded systems are also based on it. Although this is called the Linux-HA project, the software is highly portable and runs on FreeBSD, Solaris, and OpenBSD, even on MacOS/X from time to time.

There have been many articles and several chapters in books written on this project and software. See the PressRoom for more details.

We include advanced integration with the DRBD real-time disk replication software, and also work well with the LVS (Linux Virtual Server) project. We expect to continue to collaborate with them in the future, since our goals are complementary.

Heartbeat is also a leading implementor of the Open Cluster Framework (OCF) standard and when combined with a resource manager like Pacemaker, is competitive with commercial systems similar to those described in D. H. Brown's 1998 or March 2000 analysis of RAS cluster features and functions. In fact Heartbeat + Pacemaker brings technologies and basic capabilities which match or exceed the capabilities of many commercial HA systems. Check it out, we think you'll be surprised.

We have a page of reference sites to provide a few real-life examples of how organizations both small and large use Heartbeat in production. Submissions for this page are actively encouraged.

The following types of applications are typical:

  • Database servers
  • ERP applications
  • Web servers
  • LVS director (load balancer) servers
  • Mail servers
  • Firewalls
  • File servers
  • DNS servers
  • DHCP servers
  • Proxy Caching servers
  • Custom applications

Heartbeat is used in virtually every market segment, industry, and organization size.

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