On 03/28/2018 10:40 AM, Peter Humphrey wrote:
> On Wednesday, 28 March 2018 16:14:49 BST the...@sys-concept.com wrote:
>> On 03/28/2018 01:32 AM, Peter Humphrey wrote:
> [...]
>>> I have a similar system, but Atom N270. I wouldn't want to compile much on
>>> it, and certainly not GCC. I NFS-export its $PORTDIR to this much more
>>> powerful box, do the emerging here and then just install packages on the
>>> Atom. Still not exactly fast, but incomparably better.
>>
>> I should have done it as well, it is a bit too late I have only
>> 45-packages left to compile out of 710.
>> Is it better use NFS or distcc?
>> Do you have a good link how to do it with: "NFS-export $PORTDIR"
>
> I think NFS may be simpler to operate, but that may be because I'm more
> familiar with it. You just need something like this in the Atom's /etc/
> exports: /usr/portage
> 192.168.1.5(rw,no_subtree_check,anonuid=250,anongid=250,no_wdelay)
>
> That IP address is the big beast host, and of course 250 is the portage user.
>
> I don't know of a guide on the web, but basically, the method is to construct
> a 32-bit chroot on your host system and install a mirror of your Atom system
> in it. Copy your Atom's /etc/portage directory into the chroot and adjust
> things like --jobs to suit the chroot host, but make sure all the USE flags
> are the same as on the Atom. It'll take an hour or two to build the system,
> but you only have to do it once, and of course it'll be done at the speed of
> your host machine. You don't need to keep running etc-update or equivalent;
> just build the binaries.
>
> My chroot is /mnt/atom and this script starts it ready to chroot into:
>
> $ cat /etc/init.d/atom
> #!/sbin/openrc-run
>
> depend() {
> need localmount
> need bootmisc
> }
>
> start() {
> ebegin "Mounting 32-bit chroot dirs under /mnt/atom"
> mount -t proc /proc /mnt/atom/proc
> mount --rbind /dev /mnt/atom/dev
> mount --rbind /sys /mnt/atom/sys
> mount -t tmpfs tmpfs -o noatime,nosuid,nodev,noexec,mode=1777
> /mnt/atom/tmp
> mount -t tmpfs tmpfs -o noatime,uid=portage,gid=portage,mode=0775
> /mnt/atom/var/tmp/portage
> mount -t nfs -o vers=3 192.168.1.2:/usr/portage /mnt/atom/usr/portage
> rm -f /mnt/atom/etc/mtab
> cp /etc/mtab.atom /mnt/atom/etc/mtab
> eend $? "Error mounting 32-bit chroot directories"
> }
>
> stop() {
> ebegin "Unmounting 32-bit /mnt/atom chroot dirs"
> rm /mnt/atom/etc/mtab
> ln -s /proc/self/mounts /mnt/atom/etc/mtab
> umount -R /mnt/atom
> mount /mnt/atom
> }
>
> You may prefer not to bother with tmpfs, but I have 32GB RAM on my host, so
> it's efficient here. That IP address is the Atom machine.
>
> No doubt someone more skilled than me at bash scripting could improve on my
> script; suggestions welcome.
>
> After updating the chroot you can emerge -k or -K on your Atom machine, after
> syncing which will now be the most time-consuming part of the operation.
>
> Let me know if anything isn't clear.
>
> Thanks to Neil Bothwick, who showed me how to do this several years ago.
I will try do it but I'm trying to decipher the code your wrote :-)
My atom-330 is 64-bit.
I think your approach was discussed in this forum topic:
https://forums.gentoo.org/viewtopic-p-6817608.html#6817608
-------copy------------
#!/bin/sh
HOST=${0##*/}
HOST=${HOST#*-}
mkdir -p --mode=0755 /mnt/${HOST}
mount -t nfs -o rw,intr,noatime,actimeo=60,vers=4,fsc ${HOST}:/ /mnt/${HOST}
mount --bind /dev /mnt/${HOST}/dev
mount --bind /dev/shm /mnt/${HOST}/dev/shm
mount --bind /proc /mnt/${HOST}/proc
mount --bind /sys /mnt/${HOST}/sys
mount --bind /usr/portage /mnt/${HOST}/usr/portage
mount --bind /usr/local/portage /mnt/${HOST}/usr/local/portage
mount --bind /var/tmp/portage /mnt/${HOST}/var/tmp/portage
env -i - HOME="/root" TERM="$TERM" chroot /mnt/${HOST} /bin/bash -l
umount /mnt/${HOST}/dev/shm
umount /mnt/${HOST}/dev
umount /mnt/${HOST}/proc
umount /mnt/${HOST}/sys
umount /mnt/${HOST}/usr/portage
umount /mnt/${HOST}/usr/local/portage
umount /mnt/${HOST}/var/tmp/portage
umount /mnt/${HOST}
------end copy--------------
In the link above I think the Moderator suggested the change:
...
mkdr /var/tmp/portage/$HOST
mount --bind /var/tmp/portage/$HOST /mnt/${HOST}/var/tmp/portage
---
I'm still searching for a good guid howto over NFS.
It is till not clear to me what to do before or after. I need to start
with emerging NFS :-/
On my Atom-330 with MAKEOPTS="-j1" it took me over 12-hours to compile
just gcc-6.4.0-r1 :-/
and I have server on that network 8-core AMD with 32-GB or RAM (so I
might as well put it into a good use).
--
Thelma
