Component | Physical Datacenter | Virtual Datacenter |
Data Center | Bound by 1 physical site | DC migration is automated. |
Disaster Recovery | Manual. Actual Live DR rarely done, if ever. Done by each apps | Automated. Actual Live DR done frequently. Provided as service by platform |
Network | No DR Test network. No QoS (no Shares concept) | DR Test Network required. Built-in QoS. |
Back up | Back up LAN + back agent | LAN-free and agent-less for most VM. |
Clustering | MSCS | vSphere HA + Symantec AppHA |
Firewall | FW not part of Server. FW scales separately. Rules based on IP | Rules embedded into VM. Rules not limited to IP/Hostname. Engine embedded into hypervisor |
DMZ Zone | Physically separate. IP based separation. IDS/IPS limited in DMZ | Logically separate. Not limited to IP. IDS/IPS in all zones |
Chargeback | Optional | Required |
Capacity Management | Simple. | Complex. Tools required. |
Asset Management | Complex & Time consuming. | Much simpler |
Server life cycle | Manual provisioning & decomm. | Automated provisioning & retiring |
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