"Jason A. Pattie" wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Ken Murchison wrote: > > One of the five is the LTSP server as well as a render node. The other > > 4 are setup as local_app LTSP clients which have Maya installed and a > > Spider daemon running (Spider is the distributed render control piece, > > with the submission taking place on a Win32 box). I made some small > > tweaks to rc.local, such as using tmpfs instead of a ramdisk for /tmp > > and doing swap over NFS via /dev/loop instead of patching the kernel. I > > compiled my own LTSP kernel using the RH 7.3 i686/SMP config. > > I second the statement made earlier about needing the NFS swap patch. > Without the patch, if the kernel gets to the point where it has memory > pressure and needs to swap out userland code, it will swap out the NFS > userland parts and deadlock the kernel. The NFS swap patch keeps this > from happening and reserves some extra memory space (I think) for the
I haven't pushed the swap very hard, so I haven't run into this (yet). Thanks for the heads-up. > NFS userland code. From your previous post concerning the amount of > memory, etc. you have on each workstation, It doesn't seem that you will > need to swap. Also, if you do need to swap, and this is taking place on > a render farm, you will see drastic decreases in performance of you > renders unless you are using extremely fast networks (i.e., gigabit > ethernet or greater). I agree, that _any_ kind of swapping on a renderfarm is bad, so we want to make sure that we have enough memory for a "typical" render. I set up the swap as a fallback just in case we have an atypical jobs that exceeds the real memory by a "little" bit, so that the job won't just die. In the extreme case, slow performance is better than no performance. -- 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 ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.openprojects.net
