Server operating system editions should live a minimum of about 5 years 
IMNSHO. That's pretty much the lifetime we have decided on the PostgreSQL.

cheers

andrew

On 04/14/2014 02:00 PM, David Crick wrote:
> http://lwn.net/Articles/592723/
>
> "So the goal for CentOS is to create a next-generation platform that
> is supported for a longer period of time than Fedora is. Ten years
> would be good, but most people just want something longer than 13
> months, he said, and *2–3 YEARS SEEMED TO BE A SWEET SPOT*."
>
> (emphasis added by me).
>
> Pertinent question: are SL users "most people" ?
>