I don't think the socket stuff is as well tested as PVM and MPI. We've had a few problems with PVM via rpvm in the past, but I've not had problems recently (maybe this message will shake them out) and LAM-MPI via Rmpi seems a bit more stable (though perhaps less tested).
best, -tony Rong-En Fan <[EMAIL PROTECTED]> writes: > hello, > > I'm using R 1.8.1 with the lastest snow package on FreeBSD 4.9. > However, when I try to using socket clusters, it's very unstable. > Sometimes it dies half way when I run parSapply(), sometimes > it dies when cluster connection is idle. > > I create a socket cluster by following cmd > > cl = makeCluster("foo", type = "SOCK", outfile="/tmp/rafanlog"); > > Then, I just idle in R, and tail -f outfile, I got following: > > [... some R msgs ...] > > Type 'demo()' for some demos, 'help()' for on-line help, or > 'help.start()' for a HTML browser interface to help. > Type 'q()' to quit R. > > >> >> #library(serialize) >> library(snow) >> >> slaveLoop(makeSOCKmaster()) > Error in unserialize(node$con) : error reading from connection > Execution halted > > > after makeCluster() returns, the outfile hangs around the empty lines > above, about 1 minute later, all msg shows up, also it dies. > > This is reproducible on my machine. Also, one of my friends also > got this result on Linux machines w/ R 1.8.x. > > Is there any one also encounter this problem? > Any comments or suggestion are welcome :) > > Regards, > Rong-En Fan > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- [EMAIL PROTECTED] http://www.analytics.washington.edu/ Biomedical and Health Informatics University of Washington Biostatistics, SCHARP/HVTN Fred Hutchinson Cancer Research Center UW (Tu/Th/F): 206-616-7630 FAX=206-543-3461 | Voicemail is unreliable FHCRC (M/W): 206-667-7025 FAX=206-667-4812 | use Email CONFIDENTIALITY NOTICE: This e-mail message and any attachme...{{dropped}} ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html