I assume Amazon has same kind of notion "CLC" , how they managed to get the load balance so effictevely ?
Zeeshan On 11/04/2010 09:23 AM, Torsten Spindler wrote: > 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 > > > > -- Regards Zeeshan Ali Shah System Administrator PDC-Center for High Performance Computing KTH-Royal Institute of Technology , Sweden +46 8 790 9115 -- Ubuntu-cloud mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-cloud
