High availability considerations 7
Third-party software is required to keep the data in sync between the different cluster nodes. HP
recommends the following:
• DataKeeper by Steel Eye (http://www.steeleye.com/DataKeeper_Cluster_Edition_144.htm)
• Clustering For Mere Mortals, Step-by-Step: Configuring a 2-node multi-site cluster on Windows
Server 2008 R2 – Part 1 (http://clusteringformeremortals.com/2009/09/15/step-by-step-
configuring-a-2-node-multi-site-cluster-on-windows-server-2008-r2-–-part-1/)
• Double Take Availability (http://www.doubletake.com/english/products/double-take-
availability/Pages/default.aspx)
• Neverfail (http://www.neverfailgroup.com/windows-apps/sql-server-high-availability.html)
The different cluster nodes can be in the same or separate locations.
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