virtualbox.org

I want make this cenario with a machine dual core 2.0, 2 gb ram and 160 gb HD..

I think make this with a windows vista or windows server to host others 5 VSs.

this enviroment, is a good idea?
Another 5 VSs:
1 - Ubuntu Server 256 ram, to proxy squid, authenticating in an OpenLDAP;
2 - Ubuntu Server 256 ram as OpenLDAP directory service;
3 - Ubuntu Server 512 ram as monitoring and relatory / graphic server;
4 - Ubuntu Server 256 ram as mail server, an unique domain, 4 accounts or more.
5 - Ubuntu Server 256 as apache webser to hosting an unique website.

Or use Linux OS as host to others 5 VSs?

Thansk for any replies!
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Eder

You can do that, but are you sure you want it all running on just one Host? The two cores of your machine need to handle all 5 machines, that means that each VM is waiting for at least one other VM to finish it's work. That's something you don't want with a proxy and webserver. Your memory might be enough, especially if you use a swap partition on the Host when the 512 RAM that's left isn't enough for it.

Now if you want to run it on Vista, you definetly don't have enough RAM. Vista alone can take up to 1 GB, and the other GB is quickly filled by prefetch.
Windows Server, talking about 2003, can take it, but XP can do the same. Server 2008 might work, but as it's based on Vista, I doubt it. It can run in low mem mode though.

I suggest, that if you want to run this many VMs, you upgrade your system to a quad core with 4 GB of ram or more. That should take care of the biggest resource issue. The hard drive is big enough, unless the virtual servers will be growing a lot. Monitoring might get pretty big.