Re: OES 2: 32 or 64 Bit install?
a...@novell.com
Hash: SHA1
Well, doing that is fine since you mean x86_32 and x86_64 and the latter
is backward-compatible with the software built for the former. Besides
not taking full advantage of potential math benefits in the processor
there are one or two other considerations I would mention.
First, if you have >= 4 GB RAM, go with 64-bit. You can use things like
PAE in order to support > 3.x GB RAM on the system and have it all
available to the kernel, but your processes are still limited in that case
and you also have a performance hit using PAE. On the other hand running
64-bit may take a little more RAM for doing the same things as 32-bit
simply because of larger addresses or other things. In testing eDirectory
was found to take about 20% more RAM (which isn't much considering how
little it usually uses) by going from 32-bit to 64-bit and I suspect other
applications may play similarly.
On the flip side when you do decide to go full 64-bit you CANNOT do so
without reinstalling (so do it now). Also your 32-bit apps should be just
fine, even within a 64-bit OS. This is one of the reasons that Opterons,
Athlons, and other x68_64 things are beating out Itaniums and have been
for a decade.... it's hard to make people completely drop one architecture
for another when backward-compatible upgrades are an option.
Good luck.
On 02/19/2010 05:06 AM, kmaule wrote:
>
> Hi there,
> The customer is ready to migrate to OES 2 but in general prefers 32bit
> OS on a 64Bit intel platform. Is this wise or are there good reasons to
> go 64 bit from now on?
> cheers,
> Kirk
>
>
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