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Howto - professional web hosting - best practices

Hi everyone,
I would like to ask you about your opinion for my idea.
I think that buying different servers for dedicated hosting, VPSs, DNS server, etc. and spend money for connectivity for each server is too expensive for every company.
My idea is simple - making every server virtual. For example - instead placing DNS server on diffrent machine I could place it in one server with virtual dedicated server.
In my case I can buy (for example) 4 very powerfull servers and install them basic OS (centOS, fedora)without Apache, MySQL and configure them with maximum security. After that I will install a virtualization software.
After that I will create a virtual operating systems (VPS, DNS, dedicated hosting servers) with its own operating system and put every virtual system across servers.
And after that I will install management software(WHMCS and etc) to manage the hosting.
In this case I could easly transfer one virtual system from one server to other in I need to stop a server if I need to upgrade a hardware or installing new more powerfull server.
If server is infected by a hacker or is too overload I could set the virtual server to use less than 75% of total resorses of the server.
Shared hosting will be divaded and every 200 users will be putted in different virtual server.
Please write your opinion about my idea?

[ldcdc]

I think there's a number of hosts already using this, in some shape or form. crucialwebhosting's and vectorlevel's description of "split-shared"/"virtual shared" hosting seems to bear some resemblance to what your describing.





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Quote:



Originally Posted by ldcdc


I think there's a number of hosts already using this, in some shape or form. crucialwebhosting's and vectorlevel's description of "split-shared"/"virtual shared" hosting seems to bear some resemblance to what your describing.


Would you explain "split-shared"/"virtual shared". And what are the practices that big web hosting companies do to make theis servers stable to reduce downtime?

[bager]

Overall good idea, but virtualization takes resources and it's kinda hard to configure.

[ldcdc]

Quote:


Would you explain "split-shared"/"virtual shared".


The details you need would probably be most accurate coming from the hosts themselves. You can send them an email and ask them directly, or, with some luck, they might find their way to this thread and comment here.





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[MikeDVB]

Realistically it would depend on how well you could execute this plan... While it all sounds fine and dandy on paper when you try to actually create and manage such a system you may run into a few brick walls that you either need to find some way to blast through or climb over.
Good luck.





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[The Stealthy One]

Quote:



Originally Posted by bager


Overall good idea, but virtualization takes resources and it's kinda hard to configure.


Meh, it seems complicated at first. But it gets easier as you go. Virtualization is the future, but for it to really take off in the Web hosting arena, we need OSes that can better manage physical resources, and virtualization managers that interface more intimately with the OS. Right now, it is very difficult to run more than one virtualized server on a mid-grade physical server. The advantages are becoming clearer, but we have a ways to go before it really takes off.
Anyway, back to the ease issue...once you have the concept down, it's really simple.





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