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The Doctor wrote: > Maurizio Lombardi wrote: > >> Considering the fact that my bandwidth is limited to 30 Kb/s (240 >> Kbps) can it works with just 64 Mb of RAM? (Maybe limiting the >> number of connections?) > > I have been trying to run a Tor node on 64 MB of RAM, and it does > not seem to work well. Tor stays up for two or three hours and > then dies silently. I've been trying to debug it for a few weeks > now and I don't know if it's a memory limitation or the same bug > that's been discussed in at least one other thread on this mailing > list. > >> What about 128 Mb of RAM? > > No idea. Post if you give it a try, I'm interested in your > results. > Since my last post, I fixed some annoying problems I was having running tor embedded in a MIPS arch --- actually tor was fine, but there were issues with linking busybox and configuring the kernel. So, I've now pretty much ported my little environment (tor-ramdisk) to MIPS and I'm running a relay only tor node "mufasa". Its running in QEMU but as soon as I get my board, I'll move it over. Its status can be seen here: http://torstatus.kgprog.com/router_detail.php?FP=449a610341fa08c0d8c11a2309ef7313b3721451 The biggest question we've had is how much RAM does tor need in these embedded environments. Eg. I believe Kyle Willams who built JanusPA used 256MB. The answer to this question will depend on how you are using tor: client only (like JanusPA), relay only, exit. I'm going to try to address this question systematically for a relay-only node. I'll plot RAM and cpu usage versus BandwidthRate on mufasa for a few points. I'll further break down the RAM between ramdisk versus paging memory. Since the emulated environment is probably not the place to do this reliably, I'll have to wait until my board comes. I'll also proceed carefully. eg. leave a relay up for a week before tweaking the bandwidth. This will give me good statistics and also cause minimal disruption to the tor network itself. For what its worth, here's the current usage after running about 12 hrs: ramdisk 13.8 MB, paging 50.6 MB = total 64.4 MB The mips branch of tor-ramdisk can be obtained here http://opensource.dyc.edu/tor-mipsel-ramdisk BTW, I noticed a lot of downloads after my first post while I was still changing files on the archive so you may want to redownload to get the latest. I've frozen the binaries for mufasa as release 20090125. Any wishlist or caveats before I do my little experiment? - -- Anthony G. Basile, Ph.D. Chair of Information Technology D'Youville College Buffalo, NY 14201 USA (716) 829-8197 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkl8iQEACgkQl5yvQNBFVTWtdgCgpFpX/fzhkckcmK1e+IRvpf7I ebQAn0TnnHVhXrxBmaf/v8V1a0QFXL0Z =mJC9 -----END PGP SIGNATURE-----
