On 12/20/2016 12:43 PM, Eneko Lacunza wrote: > Hi, > > Sure, I meant datacenter, sorry; I didn't realize the acronym was in > spanish :) > > So let me rewrite the question :-) > > We are doing a preliminary study for a VMWare installation migration to > Proxmox (14 hosts total, 7 in each datacenter). > > Currently, customer has 2 datacenters in HA, so that if the main > datacenter goes down, all VMs are restarted in backup datacenter. > Storage is SAN and storage data is replicated using SAN capabilities. > > What can be done with Proxmox to get the same HA capabilities? Would it > be better to have 2 independent clusters, one in each datacenter, or a > unique cluster with two failure domains? > > I have some worries about quorum for a single-cluster, but I don't think > Proxmox has anything prepared for cross-cluster HA? > > Thanks a lot > Eneko
Hi Eneko Proxmox clustering uses Corosync for cluster connection, and corosync needs a low latency link between nodes, in the 5 ms range. If you have a direct *high reliable* fiber link between your two DC / CPD this might work. See this latency calculator http://wintelguy.com/wanlat.html In that case you could build a multi site cluster. You could also set up HA beween your two DCs at the application level, for instance using a bunch of stateless applications servers connecting to a DB, where you want only need to setup HA at the DB level (Hint: streaming replication if using PostgreSQL) _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user