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Providing Open Source High-Availability Software for Linux and other OSes since 1999.

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This web page is no longer maintained. Information presented here exists only to avoid breaking historical links.
The Project stays maintained, and lives on: see the Linux-HA Reference Documentation.
To get rid of this notice, you may want to browse the old wiki instead.

1 February 2010 Hearbeat 3.0.2 released see the Release Notes

18 January 2009 Pacemaker 1.0.7 released see the Release Notes

16 November 2009 LINBIT new Heartbeat Steward see the Announcement

Last site update:
2017-12-13 22:10:50

Design goal: Have the cluster stay up for 100 years without interrupting service

One of our design goals is to design a system for which it is possible to have a system stay up without a major service interruption for 100 years.

This will likely never be achieved, but holding this as a goal will help us to make the right decisions regarding compatibility.

This goal means that it should be able to provide service through:

  • HA software bug fixes
  • HA software major upgrades
  • OS upgrades
  • Application upgrades
  • Hardware upgrades
  • Major hardware architecture revisions (like 32-64 bit ints, bus changes, etc.)

Toward this end, we believe that message formats are a critical piece of the solution to this process. We have chosen a self-describing data format with data values being both named and typed.

This permits new versions of the software to easily interact with old ones without having to know the data format of every preceding version of the software.