To me, vSphere is the environment which allows virtualization using VMWare products. In fact, according to its online documentations, vSphere is the foundation for a virtual data center and consists of 3 portions to allow things to start working in tandem:
1. The vCenter Suite: a command-and-control central point to configure, provision and manage the virtualized environment. Of cos, it does not work across other vendors' platforms like Citrix or Red Hat KVM. And i think it will remain this way for obvious reasons.
2. Infrastructure Services: The hosts (ESXi or the older ESX... in other words, the hypervisor), virtual networks and shared storage, etc.
3. Application Services: Those Services that gives scalability, availability and security. Of cos, Security when implemented is still a big challenge for many virtualized IT projects.... for many reasons.
* The above is just my self-study notes. You may use it freely by just providing a link back to here.
And yes, if you like me to write more on such articles, u could either 'like' or comment on this articie, as well as provide a link back to here. This way, I would know how useful these sort of articles are to you and well try to write more despite my heavy weekend schedules (currently, almost 1/2 of it used up by my lovely infant). No promise. :)
Source: http://www.vmware.com/
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