Virtual Server Clustering with Virtual Server 2005 R2
VS2005 R2 offers three different clustering scenarios:
- Virtual Machine Guest Clustering (iSCSI): Virtual Machines are clustered on different hosts.
- Virtual Machine Guest Clustering (Shared SCSI): Virtual Machines are clustered on the same host.
- Virtual Server Host Clustering: Virtual Servers are clustered on different hosts
With Virtual Machine Guest Clustering, each Virtual Machine (VM) is a cluster node. Cluster-aware applications that are running inside a guest are considered resource groups. If an application within a resource group fails or if the guest fails, the VM containing the failure will automatically failover to another VM on the same host or on a different host. This protects against application failure.
Virtual Server Host Clustering, on the other hand, protects against host failure. Should a VS2005 R2 host fail, the VMs running on the failed host can be automatically migrated to another host in the cluster.