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OpenVZ vs. Virtuozzo

Revision as of 18:46, 4 June 2008 by DevUrandom (talk | contribs) (More details about "ram management")

Comparison

Many may wonder what exactly the difference between OpenVZ and Virtuozzo is.
Virtuozzo is based off OpenVZ, which means it adds a few features. Which are that?

  • Management interface (GUI)
  • Resource management
  • SLM memory management, while OpenVZ uses UBC ("Unified Buffer Cache"), 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.