# Update: parallel R on the TACC

I have learned from Mr. Yaakoub El Khamra that he and the good folks at TACC have made some modifications to TACC’s custom MPI implementation and R build in order to correct bugs in Rmpi and snow that were causing crashes. My earlier post has been updated to reflect the modifications. The main changes are:

1. The version of MVAPICH2 has changed to 2.0b
2. Changes to the Rmpi and snow packages necessitate using the latest version of R (Warm Puppy, 3.0.3). This version is available in the Rstats module.
3. For improved reproducibility, I modified the R code so that the simulation driver function uses a seed value.
4. I had to switch from maply to mdply as a result of (3).