simulate_parallel {simulator}

Simulate from a model in parallel.

Description

This is an internal function. Draws are done in chunks labeled by indices and of size determined by nsim. Users should call the wrapper function simulate_from_model.

Usage

simulate_parallel(
  model_ref,
  nsim,
  index,
  seeds,
  socket_names,
  libraries,
  save_locally = TRUE
)

Arguments

model_ref

object of class ModelRef

nsim

number of simulations to be conducted on each chunk. Vector of same length as index

index

a vector of positive integer indices. Allows simulations to be carried out in chunks. Each chunk gets a separate RNG stream, meaning that the results will be identical whether we run these in parallel or sequentially.

seeds

a list of length(index) L'Ecuyer-CMRG seed vectors. Each should be from a separate stream. In particular, starting from the seed used to generate the model object, seeds[i] should be the result of calling nextRNGStream index[i] times.

socket_names

(quoting from makePSOCKcluster "either a character vector of host names on which to run the worker copies of R, or a positive integer (in which case that number of copies is run on localhost)."

libraries

character vector of R packages that will be needed on the slaves.

save_locally

if TRUE, then files will be saved on slaves. If FALSE, they will be saved on master.