snow job
Using "manual = TRUE" is particularly useful when the worker gets an error before creating the log file. And using it doesn't take any R skills at all, although I guess you do need to know how to type a command into a command window. I suggest you learn how to use manual mode, because you will probably need it for debugging problems in the future. You just need to open a new command window, and paste or type the command that makeSOCKcluster tells you to execute. Hopefully you'll see an error message. - Steve
On Wed, May 11, 2011 at 9:44 PM, Whit Broach <whitneybroach at gmail.com> wrote:
(First post here and an R newbie. Glad to follow protocol.) A quick Google search of multiple lists, and a local search of downloaded hpc archives, doesn't show a thread focused on the symptom of snow crashing on Win7. I don't know where else to look, though I can tell that other people are finding similar symptoms. SNOW crashes or hangs the Rgui when my script tries to create processes on a Win7x64 box. A colleague has the same script running successfully on Ubuntu and WinXP. Sample line is: clust <- makeCluster( 2, type = "SOCK", outfile="C:/Windows/Temp/snowlog.txt" ) The malfunction occurs so soon after that line of script is invoked that the outfile does not appear on the disk. In the Performance Monitor the Rgui goes to zero CPU utilization almost immediately. List searches show the most likely root causes that the community has identified, such as an anti-virus or firewall conflict. (No luck.) The community recommends including "manual = TRUE" to see how the package calls up subprocesses on the box, but that's where my R skill hits the wall. Even still, the fact that Rgui goes to zero cpu and the log file never appears suggests that user isolation of the problem might not even be feasible. I've also tried: removing all versions of R, deleting the R folder to take out the packages and then installing the latest R. The fresh installation "works" as far as it goes, but then the script produces the same symptom. The script has previously worked on this box, so maybe a Win7 patch blew away an undocumented dependency? But I would expect to see that in the community chatter and don't. Again, just looking for a trailhead. And glad to be a responsible list member. Best regards, Whit Broach Denver, CO ? ? ? ?[[alternative HTML version deleted]]
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