Thursday, 16. October 2014., 15:10
Hall 2 Castle
For providing reliable service to a very large number of users of web applications a cluster of application servers can be used.
Solution with 12 application servers installed on virtual machines and two Hyper-V platforms connected together in a Network Load Balancing (NLB) is described. It can serve more than two thousands of simultaneous users. High availability is achieved by using two physical servers and two Hyper-V platforms. In case of failure (perhaps even transient) of one physical server or Hyper-V platform complete load is directed to second Hyper-V platform on a second server. For disaster recovery a third Hyper-V platform is provided at a remote location for Hyper-V replicas of virtual machines. The solution is particularly advantageous from the standpoint of licensing if licensing per CPU is used if instead of licensing per user.