On Fri, 2010-02-12 at 08:13 +0000, Nick Lunt wrote:
> > -----Original Message-----
> > From: [email protected] [mailto:rhelv5-list-
> > [email protected]] On Behalf Of Robert G. (Doc) Savage
> > Sent: 11 February 2010 13:18
> > To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list
> > Subject: Re: [rhelv5-list] Upgrade RHEL4 32 bit to RHEL5 64 bit ?
> > 
> > 
> > On Thu, 2010-02-11 at 11:36 +0000, Nick Lunt wrote:
> > > Hi
> > >
> > > anyone know if this upgrade path is supported/recommended please ?
> > >
> > > Thanks
> > > Nick.
> > 
> > Nick,
> > 
> > No to both questions. The devil is always in the details. The problem
> > you run into is that such a migration is not as simple as a
> one-for-one
> > replacement of every 32-bit component with its 64-bit counterpart. You
> > have to keep some. The transitional nature of many packages and the
> > non-availability of 64-bit versions of others mean both 32-bit and
> > 64-bit versions of some packages are often required. The dependency
> > combinations and permutations for 1500+ packages make such an upgrade
> a
> > Gordian knot -- with a similar solution.
> > 
> > --Doc
> 
> Noted, thanks for the info. Do you know if there are any official Red
> Hat docs anywhere saying the same ?

Nick,

Half of your answer is here:
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/pdf/Installation_Guide.pdf

That's pretty cut and dried. I don't recall ever seeing 32-bit to 64-bit
upgrades discussed in Red Hat documentation. That may be because it's
considered one of those "They want to do what?" subjects. :-)

--Doc

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