On Feb 7, 2012, at 8:07 AM, Ross Walker wrote:
> On Feb 7, 2012, at 7:58 AM, Johnny Hughes <johnny@xxxxxxxxxx> wrote:
>
>> The purpose for having enterprise software is so that you can get a
>> return on your investment and use your code for 7 years (for CentOS
>> versions before CentOS-4 ... now 10 years in post CentOS-5). But
>> keeping things for that period of time means that when you do need to
>> upgrade, the "differences" are much harder and the changes are usually
>> much bigger for a given package.
>
> For this reason it is often better to upgrade more frequently then every 7-10 years. Personally I have a 5 year max lifetime for my systems. Even then upgrades are painful and we try to stagger these so they all aren't due to upgrade at once.
----
if you think about it, perhaps you are making the case for using a configuration management system like puppet where the configuration details are more or less abstracted from the underlying OS itself. Thus once running (and I'm not suggesting that it is a simple task), migrating servers from CentOS 5.x to 6.x or perhaps to Debian or Ubuntu becomes a relatively simple task as the configuration details come from the puppet server.
This becomes more evident when you stop looking at a server being a single OS install on a single box and start running virtualized servers.
Craig
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