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→OpenVZ keeps my spam filtering business running: new section
Kudos to OpenVZ team for making this possible.
--[[User:Sukant.kole|Sukant Kole]], [http://aciil.ignou.ac.in ACIIL]23:37, 13 January 2010 (UTC)
== OpenVZ keeps my spam filtering business running ==
I'm in the spam filtering business, [http://www.junkemailfilter.com Junk Email Filter] and I'm running OpenVZ on everything. I love the virtualization for several reasons. In spam filtering there is a lot of redundancy and duplication across machines. I have a network of front end Exim servers as a front end MTA. I also have Spam Assassin virtual servers, regular name servers, caching name servers, RBL servers, post processing spam servers, and servers gathering statistics and building white and black lists.
By modularizing the functions and creating multiple OpenVZ servers I can move virtual machines from computer to computer to balance loads across several physical servers. I can create servers with different permissions so that many of these servers are more secure in that they only have root as the only real login user. If I need to expand I just buy more computers and populate them with the right combination of virtual servers.
I chose OpenVZ over other virtualizations because OpenVZ is fast and efficient. It is in fact the most fast an efficient because it sacrifices some of the features of true virtualization. It's Linux only and has a single kernel. But my needs are Linux only and OpenVZ has almost no overhead at all. It doesn't leave memory fragmented into virtual machines that never use all their ram. Instead the memory limits are just caps and memory usage depends on what you run.It's fast, it's simple, and it just works.