On 2009-02-18T17:11:32, Glory Smith <xx2gl...@gmail.com> wrote: > 1) well i guess SBD is bit different thing , it cannot be used for general > data sharing purpose. i cant store my data on SBD disk and all members of > cluster can access SBD at same time Please correct me if i am wrong. i am > new to openais-pacemaker.
The SBD mechanism ensures fencing through the shared disk. It can be used in combination with N nodes and OCFS2, for example. See http://www.linux-ha.org/SBD_Fencing > 2) scsi2reservation is not good as it does not provide persistent > reservation. a node who is having reservation will loose it after a reboot. > i want something like persistent reservation (sg_persist) . RHCS provide > persistent reservation through sg_persist. Uhm, that's exactly what scsi2reservation calls in the background. Though usually through a reboot, the other cluster members will have broken the reservation and restarted the services - after all, fail-over is the whole point of having an HA cluster. > 3)well regarding sfex , just saw it's document it seems i can use it for > general data store purpose.. does the ownership does not gets effected > during reboots? Why would ownership information persist across reboots? That is non-sensical. SCSI2 reservations don't persist across reboots - the bus reset clears them. > 4) do you mean when i need to use any of these three SBD , scsi2reservation > or sfex i will have to set stonith = disable?? cant i have both resource > and node fencing together? SBD is a stonith mechanism, so you must keep stonith-enabled=true. Sure you can mix them, but if you have node-level fencing, you don't need resource level fencing any longer. Regards, Lars -- Teamlead Kernel, SuSE Labs, Research and Development SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
