Thank you DIgimer,
So, OpenAIS and RHCS are configured in 2 different files.
Now, if OpenAIS is currently a plugin of Corosync, what functionality does
each one offer, or what is the AIS specification made for?
*José Pablo Méndez
*********
>
> (copied from a document I am working on)
>
> Component; openais / corosync
>
> OpenAIS is the heart of the cluster. All other computers operate though
> this component, and no cluster component can work without it. Further,
> it is shared between both Pacemaker and RHCS clusters.
>
> In Red Hat clusters, openais is configured via the central cluster.conf
> file. In Pacemaker clusters, it is configured directly in openais.conf.
> As we will be building an RHCS, we will only use cluster.conf. That
> said, (almost?) all openais.conf options are available in cluster.conf.
> This is important to note as you will see references to both
> configuration files when searching the Internet.
>
>
> A Little History
>
> There were significant changes between RHCS version 2, which we are
> using, and version 3 available on EL6 and recent Fedoras.
>
> In the RHCS version 2, there was a component called openais which
> handled totem. The OpenAIS project was designed to be the heart of the
> cluster and was based around the Service Availability Forum's
> Application Interface Specification. AIS is an open API designed to
> provide inter-operable high availability services.
>
> In 2008, it was decided that the AIS specification was overkill for RHCS
> clustering and a duplication of effort in the existing and easier to
> maintain corosync project. OpenAIS was then split off as a separate
> project specifically designed to act as an optional add-on to corosync
> for users who wanted AIS functionality.
>
> You will see a lot of references to OpenAIS while searching the web for
> information on clustering. Understanding it's evolution will hopefully
> help you avoid confusion.
>
> --
> Digimer
> E-Mail: [email protected]
> AN!Whitepapers: http://alteeve.com
> Node Assassin: http://nodeassassin.org
>
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