Re: [gentoo-user] Emerging package via NFS ?

[YoYo Siska]

On Wed, Dec 15, 2010 at 10:15:12AM +0100, Thomas Drueke wrote:
> Hi,
>
> is it possible to emerge packages to a $ROOT directory mounted via NFS ?
>
> The setup is
> - machine A is equipped with a Quad core CPU
> - machine B is equipped with an N330 Atom-CPU
> - machine A is doing the system update on a local chroot-environment
>   for machine B and generates binary packages. These packages are
>   installed on machine B using the binary package feature of portage.
>
> I expected that the above setup would give an performance improvement
> over letting machine B do the portage update itself. However a trial run
> did not show significant improvement that justifies the effort. Machine
> B still needs a reasonable amount of time to fetch unpack and install
> the packages.
>
> An alternative way might be to mount machine B's / directory via NFS
> and change make.conf's $ROOT variable to that mount point.
>
> Does that sound as a reasonable approach ?

I had a very old machine, that was really slow. Compiles could be
offloaded by distcc, but even the ./configure-s and portage stuff
(checking, upacking, ...) was reaaly slow...

So I just used to export / through nfs, mounted it on a fast amd64  and
basically did (other is the slow machine)

mount other:/ /mnt/other
mount -t proc proc /mnt/other/proc
mount --bind /dev /mnt/other/dev
mkdir /tmp/other
mount --bind /tmp/other /mnt/other/var/tmp/portage
mkdir /home/gentoo-other 
mount --bind /home/gentoo-other /mnt/other/home/gentoo

linux32 chroot /mnt/other /bin/bash
emerge.....

For the last mkdir/mount, I have DISTDIR=/home/gentoo/distfiles and
PKGDIR=/home/gentoo/packages in make.conf, you can do that with the
standart /usr/portage/{distfiles,packages}

This way most of the compile is done "localy" on the fast machine.
yoyo


>
> Regards,
> Thomas
>