Re: Emulate RHEV On CentOS - A note on Xen v. KVM

[Steve Walsh <steve@xxxxxxxxxxxxxxx>]

  On 09/08/2011 12:53 AM, Always Learning wrote:
> So, if I understand the situation, patches create flexibility in
> run-time options not available in run-time configuration files ?

Someone submits a patch as a quick-fix to a problem they've seen, which 
gets accepted and inserted into the package. Down the track, a better 
fix is submitted and accepted. All you need to do is pull the first 
patch file and insert the second one, update your spec file then rebuild 
the RPM.

If everything was all squashed up into one great big code base, you need 
to hunt around to find the change that was made, pull it out, make sure 
you code builds, then insert the new change, make sure it builds, etc. 
revise and repeat until you have something you can ship.

First method takes about 2-3 minutes.

Second method takes however long it takes, and may introduce other 
errors or issues.

The first method also means that if the patch changes something you need 
to adhere for legal reasons (like, say, branding), you just pull that 
patch from the spec file and it's a trivial exercise.

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