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Special Forums UNIX and Linux Applications High Performance Computing High reliability web server - cluster, redundancy, etc Post 302302261 by kipperjp on Monday 30th of March 2009 01:38:16 PM
Old 03-30-2009
Keep in mind that clustering does not mean high availability. CLustering is sharing resources with multiple machines. What you need to look into is syncing and failover mechanisms so that 2 web servers at different locations are mirrored copies so that if one goes down, dns is routed to the other server.

I am kind of down this route myself and learning as I go. Be nice to utilize an HA consultant as trial and error can be costly.
 

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cm(5)								File Formats Manual							     cm(5)

NAME
cm - cluster monitor for high availability clusters Remarks Cluster operations require the installation of the optional Serviceguard or Serviceguard Extension for RAC software, which is not included in the standard HP-UX operating system. DESCRIPTION
Serviceguard and Serviceguard Extension for RAC are high availability products which provide an environment such that after a failure of a node, services (applications) can be up and running again on another node within a very short amount of time. In addition, Serviceguard Extension for RAC is the enabling software for the Real Application Clusters (RAC). Working with the basic Serviceguard product, Service- guard Extension for Faster Failover allows configuration of clusters for optimized failover. Commands The following set of commands is used to configure a high availability cluster: cmquerycl(1M) cmmakepkg(1M) cmcheckconf(1M) cmapplyconf(1M) The following commands are used to run or halt a cluster: cmruncl(1M) cmhaltcl(1M) cmrunnode(1M) cmhaltnode(1M) cmviewcl(1M) Once a cluster is formed, the following commands are provided for manual operation on high availability packages: cmrunpkg(1M) cmhaltpkg(1M) cmmodpkg(1M) The following commands are used within a package control script to control the services and networks configured for a package: cmrunserv(1M) cmhaltserv(1M) cmmodnet(1M) A command is provided to aid in migrating from a SwitchOver/UX configuration to a Serviceguard cluster: cmmigrate(1M) This command is not applicable with Serviceguard Extension for RAC. SEE ALSO
Managing Serviceguard. Configuring RAC Clusters with Serviceguard Extension for RAC. Requires Optional Serviceguard Software cm(5)
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