On Thu, 2010-11-04 at 09:13 +0100, Björn Böttcher wrote: ... > Still open question: > But do the multiple CC/SC machines synchronize automatically?
Nope, the cluster controllers (CC) manage different clusters and do not synchronize any state between them. Same for the storage controllers (SC) that are attached to different clusters. Instead your payload on UEC (e.g. a webapp) needs to be tailored for fault tolerance, when a cluster fails. For example, a load balancer outside of UEC may direct requests to either cluster in your UEC. If one fails, the load balancer learns about it (maybe through a heartbeat?) and directs any requests to the remaining cluster(s). On your original question, the cloud controller (CLC) is indeed a single point of failure. Putting it on hardware that provides some resilience towards failures is best practice there. Torsten -- Ubuntu-cloud mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-cloud
