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→IP Allocation Advantages
Tired of allocating 4 IP addresses just to give the customer 1 usable? Or giving them 8 so they have 5 usable and them most of them only use one? How inefficient is that? With OpenVZ you can allocate IP addresses individually so that if a customer only needs one IP then they get only 1 IP. But if they need 9 IP addresses you can give them exactly 9 of them. They can call you up and say I need one more IP and you can give it to them in seconds. On a dedicated server if you gave them a /29 vlan and they are using all 5 IPs and they need another one - that is a huge hassle.
== Disk Space Allocation ==
On dedicated servers you have to install a big hard drive that is mostly wasted. If the customer wants backups then it's two hard drives. In OpenVZ you just allocate space in the raid array based on what the customer actually needs and they only use the space that they use rather than what's allocated. The "allocation" is really just a software limit and that is a line in a text file that you can instantly change the moment the customer needs more space. On a dedicatd box if the customer need a bigger drive then it's a trip to the data center with a new drive and a few hours time to copy everything over and replacing the drive, not to mention the down time.
== Memory Upgrades ==
Memory upgrades are as easy as hard drive upgrades. Juch one command that the user has more ram. But what if the server is full and you don't have any more ram? No problem. Just copy the user's VE (virtual environment) over to another physical server with rsync and start them up there. In only a few minutes you've migrated them to a new box and they are up and running.
== Migration ==
Suppose a customer just needs a bigger server. Migration is easy in the VPS environment because the VE is consistent between servers. You just copy over the files and start it up. You don't have to build a new server, install an OS, copy it all over, and then mess with it for an hour getting everything to work.
