On Mon, 2009-03-30 at 10:58 +0200, Hervé Gautier wrote: > Thank Steven for your answers. > > What do you mean by "cluster engine" ? Will you qualify Pacemarker as a > "cluster engine" ?
A cluster engine is a set of services which provide a framework for "service engines" to operate. Pacemaker is a "service engine". To understand more fully the semantics we use, read: http://ols.fedoraproject.org/OLS/Reprints-2008/dake-reprint.pdf > If I understand you, OpenAIS can not be used as a standalone library. openais 0.80.X is standalone. IN openais 0.9x+ openais becomes service engines to corosync. > > Any corosync process(es) should run in order to use OpenAIS ? Depends on version, but corosync 0.95 should be used to run openais 0.94 currently. > I have quickly seen some patch for a quorum_vote C function/file. Is a > cluster is running after a quorum vote ? > The way corosync works, quorum is intended as a notification to services. It does block new API calls for services which require quorum to operate. > Sorry for all these questions, but I haven't seen any documentation > about corosync and its architecture. Read the OLS paper as a start. > As I am interested by cluster issue I try to understand your project > because it seems to be the last hope to have a decent cluster, as > FailSafe has no more support, and heartbeat (v1 and v2) does not match > with my opinion of a cluster manager for non aware HA applications. I > haven't try the latest Red Hat Cluster, but the earlier version was not > enought advanced for me. > Pacemaker is solid, but not yet available on corosync. I think Andrew will be working on it shortly. It is mostly just a massive search and replace process. > Thank in advance for your lights. > > Regards, > > -Rv > > Steven Dake a écrit : > > Corosync is a cluster engine which uses plugins (called service engines) > > and provides services to the plugin users. > > > > OpenAIS is designed now as plugins to the corosync cluster engine. > > OpenAIS now consists of service engine plugins as well as libraries the > > user links with that connects to those service engines. > > > > I hope that clears up the architecture a bit. > > > > Regards > > -steve > > > > > > -- > Hervé GAUTIER > > _______________________________________________ > Openais mailing list > [email protected] > https://lists.linux-foundation.org/mailman/listinfo/openais _______________________________________________ Openais mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/openais
