News

Package: future.callr

Version: 0.4.0 [2019-01-05]

NEW FEATURES:

• Now the future label is exposed in the process information (e.g. top) via a dummy --future-label="" argument in the callr system call.

BUG FIXES:

• plan(callr, workers) where 'workers' being a function would result in an error when a future was created.

Version: 0.3.1 [2018-07-18]

NEW FEATURES:

• The callr backend supports the handling of the standard output as implemented in future (>= 1.9.0).

BUG FIXES:

• Callr futures did not protect against recursive parallelism, e.g. with plan(list(callr, callr)) the second layer of futures would use the same number of workers as the first layer.

Version: 0.3.0 [2018-05-03]

NEW FEATURES:

• Argument 'workers' of future strategies may now also be a function, which is called without argument when the future strategy is set up and used as is. For instance, plan(callr, workers = halfCores) where halfCores <- function() { max(1, round(availableCores() / 2)) } will use half of the number of available cores. This is useful when using nested future strategies with remote machines.

• Gathering of results from background processes is made a little bit more robust against slow file systems by retrying a few times before accepting an error as an error.

CODE REFACTORING:

• Prepared code to gather a richer set of results from futures.

BUG FIXES:

• Callr futures did not acknowledge timeout option 'future.wait.timeout'.

Version: 0.2.0 [2018-02-12]

NEW FEATURES:

• Producing errors of class FutureError where applicable.

DOCUMENTATION:

• Minor updates to the vignette related to the callr package.

Version: 0.1.1 [2017-11-18]

BUG FIXES:

• Number of workers in plan(callr, workers = n) was not respected.

Version: 0.1.0 [2017-11-16]

NEW FEATURES:

• Added callr futures. Use plan(callr) or plan(callr, workers = 4L).

Reference manual