snydeq writes "InfoWorld's Paul Venezia takes VMware's purported 'cloud OS,' vSphere 4, for a test drive. The bottom line: 'VMware vSphere 4.0 touches on almost every aspect of managing a virtual infrastructure, from ESX host provisioning to virtual network management to backup and recovery of virtual machines. Time will tell whether these features are as solid as they need to be in this release, but their presence is a substantial step forward for virtual environments.' Among the features Venezia finds particularly worthwhile is vSphere's Fault Tolerance: 'In a nutshell, this allows you to run the same VM in tandem across two hardware nodes, but with only one instance actually visible to the network. You can think of it as OS-agnostic clustering. Should a hardware failure take out the primary instance, the secondary instance will assume normal operations instantly, without requiring a VMotion.'"
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