Dear R Users,
I have a relatively simple rmpi question.
My configation is:
- R version 2.7.2
- rmpi 0.5-6
- Deino MPI 1.1.0
- Windows XP SP2
After succesfully spawning slaves, I am trying to assign values to
variables in the environment of each slave and run some simple calcs. This
appears to fail, as below: my assignment of value "1" to variable "a"
appears to come back OK, but then when I try and retrieve it, it fails.
Could someone please point out what I might be doing wrong ?
I spawn 8 slaves below, but have deleted the output from slaves 3-7 just
to save space and make the output easier to read.
> mpi.spawn.Rslaves()
8 slaves are spawned successfully. 0 failed.
master (rank 0, comm 1) of size 9 is running on: Personal
slave1 (rank 1, comm 1) of size 9 is running on: Personal
slave2 (rank 2, comm 1) of size 9 is running on: Personal
...
slave8 (rank 8, comm 1) of size 9 is running on: Personal
> mpi.remote.exec(paste("I am",mpi.comm.rank(),"of",mpi.comm.size()))
$slave1
[1] "I am 1 of 9"
$slave2
[1] "I am 2 of 9"
...
$slave8
[1] "I am 8 of 9"
> mpi.remote.exec(eval(assign("a","1")))
$slave1
[1] "1"
$slave2
[1] "1"
...
$slave8
[1] "1"
> mpi.remote.exec(eval(assign("b","2")))
$slave1
[1] "2"
$slave2
[1] "2"
...
$slave8
[1] "2"
> mpi.remote.exec(a)
$slave1
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"
$slave2
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"
...
$slave8
[1] "Error in eval(expr, envir, enclos) : object \"a\" not found\n"
attr(,"class")
[1] "try-error"
Thanks in advance,
Tolga
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