A Future API for Parallel and Distributed Processing using BatchJobs

Implementation of the Future API on top of the 'BatchJobs' package. This allows you to process futures, as defined by the 'future' package, in parallel out of the box, not only on your local machine or ad-hoc cluster of machines, but also via high-performance compute ('HPC') job schedulers such as 'LSF', 'OpenLava', 'Slurm', 'SGE', and 'TORQUE' / 'PBS', e.g. 'y <- future_lapply(files, FUN = process)'.


Package: future.BatchJobs

Version: 0.13.1 [2016-10-20] o GLOBALS: Now globals can be specified explicitly. o Added argument 'job.delay' to batchjobs_() futures for passing it as is to BatchJobs::submitJobs() used when launching futures. o Added argument 'label' to batchjobs_() futures which are reflected in the job name listed by schedulers. Because of limitation is BatchJobs, not all characters in the labels are support and are therefore dropped in the job names.

Version: 0.13.0 [2016-08-02] o Added argument 'resources' to batchjobs_*() functions for passing it to the BatchJobs template (as variable 'resources'). o ROBUSTNESS: value() now launches the future iff not already done. Added protection from launching a future more than once.

Version: 0.12.1 [2016-06-26] o Advicing against multicore BatchJobs futures, because there is a risk for long waiting times due to starvation. This is a limitation of the BatchJobs package. o BUG FIX: Multicore BatchJobs futures are not supported on Solaris Unix and falls back to local BatchJobs futures (as on Windows). This is a limitation of the BatchJobs package.

Version: 0.12.0 [2016-06-25] o Added predefined batchjobs_local(), batchjobs_interactive(), batchjobs_multicore(), batchjobs_lsf(), batchjobs_openlava(), batchjobs_sge(), batchjobs_slurm(), batchjobs_torque() and batchjobs_custom() futures. o Added nbrOfWorkers() for BatchJobs futures. o CLEANUP: Removed non-used completed(), failed() and expired() for BatchJobs objects. o CLEANUP: Now "Loading required package: BatchJobs [...]", which is outputted when the first BatchJobs future is created, is suppressed. o CLEANUP: Deprecated backend().

Version: 0.11.0 [2016-05-16] o Add package vignette. o Now BatchJobsFutureError extends FutureError. o WORKAROUND: The BatchJobs multicore cluster functions are designed to give some leeway for other processes on the local machine. Unfortunately, this may result in endless or extremeley long waiting for free resources before BatchJobs multicore jobs can be submitted. One reason is that BatchJobs tries to keep the average CPU load below a threshold that is calculated based on the number of cores. Unfortunately, this can result in starvation due to other processes, especially if the number of cores on the machine is small and/or if mc.cores is set to a small number. Because of this, we disable this mechanism (by using BatchJobs parameter max.load=+Inf). o backend("multicore=1") or other multicore specifications that result in single-core processing will use backend("local") instead. o BUG FIX: backend("multicore-3") was interpreted as backend("multicore").

Version: 0.10.0 [2016-05-03] o Now the BatchJobsFutureError records the captured BatchJobs output to further simplify post mortem troubleshooting. o Now delete() for BatchJobsFuture will not remove the BatchJobs registry files if the BatchJobs has status 'error' or 'expired' and (new) option 'future.delete' is not set to FALSE (which it is if running in interactive mode). The new setup is useful for troubleshooting failed BatchJobs futures in non-interactive R sessions, which otherwise would be cleaned out when the R session terminates (due to garbage collection calling delete()). o BUG FIX: resolved() on a BatchJobs future could return FALSE even after value() was called. Added package test.

Version: 0.9.0 [2016-04-15] o Package renamed to future.BatchJobs (was async). o Package requires R (>= 3.2.0) just so Mandelbrot demo works. o STANDARIZATION Now using option and environment names already defined by the future package, i.e. future.maxTries, future.interval, and R_FUTURE_MAXTRIES (used to be named async::* and R_ASYNC_*). o STANDARIZATION: Directories for BatchJobs are now created under .future// of the current directory (was .async//). Also, those subdirectories now use prefix 'BatchJobs_' (was 'async'). This was done to have a common directory structure also for other future backends that needs to keep files on the file system. o CLEANUP: Renamed AsyncTaskError to BatchJobsFutureError. o CLEANUP: Dropping AsyncListEnv.

Version: 0.8.0 [2016-04-14] o batchjobs() function gained class attribute. o Renamed BatchJobsAsyncTask to BatchJobsFuture. o CLEANUP: Removed no-longer needed asyncBatchEvalQ() because BatchJobsFuture is now self sufficient. o BUG FIX: Global variables with the same name as objects in the base or the BatchJobs package would be overridden by the latter, e.g. a global variable 'col' would be masked by 'base::col'. (Issue #55)

Version: 0.7.1 [2016-01-04] o BUG FIX: New BatchJobs work directories would encode 08:03 as ' 803' instead of '0803' resulting in a BatchJobs assertion error on invalid pathnames.

Version: 0.7.0 [2016-01-02] o Now value() for BatchJobsAsyncTask removes associated BatchJobs subdirectories upon success. Previously, such cleanup was only happening when the object was garbage collected. o Each R session that load the async package now uses a unique subdirectory under .async/, e.g. .async/20160102_154202-IVBRy1/. It is in turn under that session-specific subdirectory that the individual BatchJobs subdirectories corresponding to a specific future lives. Note that, although, the each of latter is removed when calling value() for its future, the session-specific async directory is not removed. In order to remove the latter, make sure to resolve all futures. Then call unloadNamespace("async"), which will try to remove the directory.

Version: 0.6.2 [2015-11-21] o BUG FIX: asyncBatchEvalQ() would not export globals that belongs to a package but are not exported.

Version: 0.6.1 [2015-10-20] o CLEANUP: Package no longer attaches listenv. o BUG FIX: Globals that were copies of package objects were not exported to the future environments.

Version: 0.6.0 [2015-10-05] o batchjobs(sum(x, ...), globals=TRUE) now handles ... properly. o ROBUSTNESS: asyncBatchEvalQ() gives an informative error when a global variables starting with a period needs to be exported; these are currently not supported due to limitations in the BatchJobs package. o WORKAROUND: Global variables with names starting with a period ort that does not match pattern '[a-zA-Z0-9._-]+' could not be exported due to BatchJobs limitation. Until resolved by BatchJobs, this package encode and decode such variable names automatically. o ROBUSTNESS: Package test coverage is 88%. o BUG FIX: resolved() for AsyncFuture:s would always give FALSE unless value() of the future has been called first.

Version: 0.5.2 [2015-07-30] o CLEANUP: Dropped %backend% - use %plan% backend(...) instead. o BUG FIX: batchjobs(..., backend="interactive") changed also the default backend.

Version: 0.5.1 [2015-07-29] o Adjusted to future (>= 0.7.0). o CLEANUP: Dropped functions and tests that are now in the future package.

Version: 0.5.0 [2015-06-19] o Adjusted to future (>= 0.5.1).

Version: 0.4.2 [2015-06-14] o Added demo("mandelbrot", package="async"). o Added run() for BatchJobsAsyncTask. o CLEANUP: BatchJobsAsyncTask no longer registers/submits jobs. o CLEANUP: Dropped asyncEvalQ(). o CLEANUP: Dropped async() - now batchjobs(). o CLEANUP: Dropped makeClusterFunctionsRscript(). o CLEANUP: Dropped delayed assignment %<-% infix operator.

Version: 0.4.1 [2015-06-14] o Add batchjobs() allowing for plan(batchjobs, backend="multicore"). o BatchJobsAsyncTask() and internal tempRegistry() gained argument 'backend'.

Version: 0.4.0 [2015-06-08] o CLEANUP: Extract Future API and moved to new package 'future'. o Now delayedAsyncAssign() returns a Future. o BUG FIX: The existance of .BatchJobs.R would override whatever backend was already set by backend(). o BUG FIX: Asynchroneous evaluation of { a <<- 1 } no longer identifies 'a' as a global variable that needs to be exported.

Version: 0.3.1 [2015-05-23] o CLEANUP: Moved more internal code to the 'listenv' package.

Version: 0.3.0 [2015-05-21] o Now inspect(envir=x) returns all tasks if only the environment is specified, e.g. inspect(envir=x) vs inspect(x$a). o Added completed() and failed(), expired(). o Any flavor of backend("multicore") is based on availableCores(). o Added availableCores() for identifying the number of available cores. The default is to acknowledged the assigned number of cores by queing systems such as Torque/PBS, before using detectCores() of the 'parallel' package. o CLEANUP: Moved identification of globals to new 'globals' package. o CLEANUP: Moved list environments to new 'listenv' package. o ROBUSTNESS: Asynchroneous tasks that still run when R exists will not be stopped and not deleted. This will allow the tasks running on job clusters to complete. o BUG FIX: AsyncTask objects were not assigned to the listenv.

Version: 0.2.0 [2015-05-11] o Functions AsyncTask() and delayedAsyncAssign() gained argument 'substitute' for controlling whether the expression/value should be substitute():d or not. o ROBUSTNESS: Added package tests for delayedAsyncAssign(). o ROBUSTNESS: Package test coverage is 77%. o CLEANUP: Internal restructuring with more informative classes.

Version: 0.1.4 [2015-05-02] o Added print() for listenv:s. o CLEANUP: Using tempvar() of R.utils.

Version: 0.1.3 [2015-04-26] o Added AsyncListEnv. o ROBUSTNESS: Add protection for trying to evaluating asynchroneous expressions with global objects that are "too large" and therefore introduces lots of overhead in exporting to, and importing from workers. The size limit of the maximum allowed total export size is controlled by option 'async::maxSizeOfGlobals'.

Version: 0.1.2 [2015-04-21] o Now status(), finished() etc. for AsyncTask returns NA in case task backend registry is deleted. print() does a better job too in this case. o Now inspect() also accepts complex input such as inspect(a$x), inspect(a[["x"]]) and inspect(a[[1]]). It also accepts a character name such as inspect("x", envir=a). o Now await() for AsyncTask gives an more informative error message in case the backend registry was preemptively deleted. o Added error classes AsyncError and AsyncTaskError with more informative error messages simplifying troubleshooting. o CLEANUP: Now async BatchJobs registries are created in ./.async/ o BUG FIX: Delayed (synchroneous and asynchroneous) assignments to listenv:s did not update the internal name-to-variable map, which effectively made such listenv:s object empty (although the assign value was stored internally).

Version: 0.1.1 [2015-04-07] o BUG FIX: asyncBatchEvalQ() would given "Error in packageVersion(pkg) : package 'R_GlobalEnv'" if the expression had a global function defined in the global environment. Now asyncBatchEvalQ() does a better jobs in identifying package names. Added package tests for this case.

Version: 0.1.0 [2015-02-07] o First prototype of an old idea of asynchronous evaluations with delayed assignments. o Created.

Reference manual

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0.15.0 by Henrik Bengtsson, 2 months ago


Report a bug at https://github.com/HenrikBengtsson/future.BatchJobs/issues

Browse source code at https://github.com/cran/future.BatchJobs

Authors: Henrik Bengtsson [aut, cre, cph]

Documentation:   PDF Manual  

Task views: High-Performance and Parallel Computing with R

LGPL (>= 2.1) license

Imports BatchJobs, R.utils

Depends on future

Suggests listenv, markdown, R.rsp

See at CRAN