Hi, Some thoughts about our solution for split-site cluster: 1. the split-site cluster includes one or more sites. 2. a site means a set of nodes in one subnet. 3. a subcluster means a set of nodes which can connected each other in one site. 4. quorum is required to provide service. 5. there are two levels of the quorum, local quorum(or inside a site, or in one subnet) and global quorum (inter-site, cross site or whole cluster). 6. local quorum means more than half nodes in the site (or by tie-breaker plugin), in current implementation. 7. calculating local quorum don't need the information of nodes in other site(s). 8. global quorum would be decide by 3rd quorum server with the information of the sites and subclusters. 9. if the subcluster has both the local and global quorums, we say that it has the quorum.
Any comment is welcome. -- Best Regards, Huang Zhen Linux-HA, Linux Technology Center, China Systems & Technology Lab China Development Labs, Beijing Tel: 86-10-82782244 Ext. 2845 Email: [EMAIL PROTECTED] _______________________________________________________ Linux-HA-Dev: [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
