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Re: Tracking sarge

Alice Stamping <alstamp@gmail.com> writes:

> Hi,
> Many thanks for your quick reply.
> On Thu, 03 Feb 2005 16:24:27 +0100, Goswin von Brederlow
> <brederlo@informatik.uni-tuebingen.de> wrote:
>> Alice Stamping <alstamp@gmail.com> writes:
>> > I would like to use some AMD Opteron kit in production with Debian.  I
>> > don't, therefore, fancy tracking unstable with these boxes. :)
>> > I want to track sarge with these computers.  Is it possible to :
>> >  - install Debian Sarge from the i386 iso
>> yes
> Good.
>> >  - using make-kpkg build a 64-bit kernel on the newly installed box
>> > for the AMD 64 bit platform.
>> Not comfortably.
>> apt-get install kernel-image-2.6-amd64-<tab>
>> kernel-image-2.6-amd64-generic  kernel-image-2.6-amd64-k8-smp
>> kernel-image-2.6-amd64-k8       kernel-image-2.6-amd64-xeon
> Less work for me if someone at Debian was kind enough to make a kernel
> already. :)

They have. Its even in sarge.

>> >  - build the packages we normally build from source from sources after
>> > booting into the 64 bit kernel (e.g. apache/php)
>> That needs all the build-depends too. A lot of building and all of it
>> not prepared for in a 32bit userland. It's possible but a lot of work.
> Of course (I was planning to take a --get-selections from the current
> Xeon doing the job, taking my own packages out, then running a
> --set-selections on the new Opteron kit - that way I'll get the
> build-deps, but of course they wont be 64-bit - that small matter had
> escaped me.)
> If I just used a 64 bit kernel, and kept the rest of the system
> tracking 32-bit packages, would I still see stronger performance than
> an equivilently specced Xeon system?

>From what I heart you won't feel the difference. The advantage of a
64bit kernel lies in having more than 3GB address space (more than 4GB
for 64bit) programs and the possibility of more than 4GB physical ram

> Your help is very much appreciated.
> BR


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