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On Thursday 10 July 2003 04:19 pm, Greg Freemyer wrote: > > > With OpenDLM in my mind, I would like to chose Linux-HA heartbeat as > > > cluster manager first. Other cluster manager also should be > > > supported in > > > later stage. > > > > Does linux-HA heartbeat still have the limitation of only 2-node > > failover? Or is that a factor in what you have in mind? > > Yes, heartbeat only supports 2-node failover, but I don't think ogfs > would utilize any failover logic. > > ogfs might use the heartbeat api, but I don't see any join/leave event > notification in it. I'm either missing it, or heartbeat has another > api. Brian, do you know? > > http://linux-ha.org/heartbeat/heartbeat_api.html The OCF event API draft 2 is what has been implemented in heartbeat OCF event API draft 2: http://opencf.org/cgi-bin/viewcvs.cgi/specs/event/Event.api?rev=1.2&content-type=text/vnd.viewcvs-markup the OCF includes that are a part of heartbeat are here: http://cvs.linux-ha.org/viewcvs/viewcvs.cgi/linux-ha/include/ocf/ One thing to look at would be how EVMS does it. All the code they have that deals with clustering is in the plugins/ha directory of their code. > > FYI: I don't recall the max nodes supported by the heartbeat api, but > I'm pretty sure it is more than 2. linux-ha/include/heartbeat.h: #define MAXNODE 100 > > > I'm wondering if it would be easy to simply use memexpd as the cluster > > manager for now, rather than trying to switch. We could probably > > continue to use memexpd as cluster manager, *without* using it as lock > > manager, once we get OpenDLM support. > > Agreed, or alternatively, we could work on restructuring the clustering > logic first, then do the locking restructure later. It does seem easier > to work on one or the other. too right! > > > If this makes sense, Stan, could you write up a more detailed design > > proposal? Describe how you would split up the memexp module's private > > data structure into separate cluster/lock modules? Which functions in > > which module? etc. > > > > Any comments from anyone else? > > > > -- Ben -- > > > > Opinions are mine, not Intel's > > > > > Any comments? > > > > > > Best Regards, > > > Stan <snip> p.s. I just snipped like 40 lines of sf adds, sigs, etc. and so can you and you and you :) -- OpenGFS -- http://opengfs.sourceforge.net Home -- http://www.brianandsara.net ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ Opengfs-devel mailing list Opengfs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opengfs-devel