I didn't see this mentioned in the archives, so I thought I'd share it.
In the process of building a LTSP-based renderfarm for a customer, I had
to compile my own kernel from the RH 7.3 sources (for reasons that I
won't get into). As you may or may not now, RedHat has a bunch of their
own patches to the 2.4.18 kernel, so the Swap-over-NFS NFS patch does
not apply cleanly. In order to avoid porting the patch to the work with
the RedHat kernel, and to avoid using any third-party patches at all, I
started looking for another way to Swap-over-NFS. Here is what I've
done:
- Compile the kernel for the workstations to include support for loop
devices (CONFIG_BLK_DEV_LOOP=[y|m])
- Copy your server's /sbin/losetup to /opt/ltsp/i386/sbin
- In /opt/ltsp/i386/etc/rc.local, change:
swapon ${SWAPFILE}
to:
/sbin/losetup /dev/loop0 ${SWAPFILE}
swapon /dev/loop0
The performance of swapping via the loop device might be slower than
using the kernel patch (I haven't done any comparisons), but since I'm
only doing this as a last-resort fallback for my render nodes (each has
2GB RAM), I'm not really worried about it).
After making this change, and using tmpfs instead of a ramdisk for /tmp
(my render nodes need more than a few MB of temp space), I couldn't be
happier with LTSP.
Thanks for the great work!
Now if I could only figure out how to get dhclient to exit gracefully so
/oldmount gets unmounted...
--
Kenneth Murchison Oceana Matrix Ltd.
Software Engineer 21 Princeton Place
716-662-8973 x26 Orchard Park, NY 14127
--PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp
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