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More details about "ram management"
== Comparison ==
Many may wonder what exactly the difference between OpenVZ and Virtuozzo is.<br/>
Virtuozzo is based off OpenVZ, which means it adds a few features. Which are that?
* Management interface (GUI)
* RAM Resource management* SLM memory management, while OpenVZ uses UBC ("Unified Buffer Cache"), [[OpenVZ vs. Virtuozzo#SLM vs. UBC|see below for a comparison]].
* VZFS (allows for disk and memory savings very similiar to Linux-VServer's copy-on-write system called "unification")
* Commercial support
OpenVZ is mostly run by Parallels (owner of Virtuozzo) employees, who maintain OpenVZ as the core functionality of Virtuozzo.
== SLM vs. UBC ==
An example would be: With UBC a VPS may be limited to 128 iptables entries. With SLM you can create thousands of iptables entries up to their global RAM limit.
See bottom of http://www.tektonic.net/vz.html for a description of the SLM technology.
