Hello all.
My system information:
R 2.14.1 x64
Windows 7
I'm attempting to access cores on other machines in my LAN. As setup, I can
ping all the machines successfully and it's a private office network where I
have access to all computers, so there really shouldn't be any problems arising
from the network itself.
All machines I am connecting to have identical system information.
I issue the following command to make a connection to the remote machine and
access one of its cores.
cl<-makePSOCKcluster(c(remoteHostIP), rshcmd="plink", outfile="")
The parallel package, to make remote connections, issues a system command
(found in the file snowSOCK.R, function newPSOCKnode of the source) of the
following form on the remote machine
ssh -l user otherhost '/usr/lib/R/bin/Rscript' -e 'parallel:::.slaveRSOCK()'
MASTER=myhost PORT=10187 OUT=/dev/null TIMEOUT=2592000 METHODS=TRUE XDR=TRUE
Where the specific command (ssh) can be specified by the rshcmd parameter of
the command makePSOCKcluster. Given that a command such as ssh must be present
on the machine, I installed PuTTY on both the master and host, and added the
pertinent path to the system PATH variable so that plink is always accessible
from the command line. I'm not set on PuTTY, it's just free and I've used it
before.
Here are my two cases. If I issue my above command, the process hangs
indefinitely. If I set the manual flag equal to TRUE, as in the following
cl<-makePSOCKcluster(c(remoteHostIP), rshcmd="plink", outfile="", manual=TRUE)
I'm able to make the connection to the remote host just fine. This indicates
to me that there is something wrong with the system command that is being
issued with manual=FALSE (the default).
Another problem with this is that it is seemingly very hard to test, as the
hanging process gives me no information on what is actually occurring. Has
anyone had any success with this? Are there any ideas on steps I could take to
fix or debug this issue?
Regards,
Dylan
Dylan Tevlin
(480) 419-3611
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