Get current mapreducer configuration
mr = gcmr returns an object representing
the current global execution environment for mapreduce.
If no global execution environment exists, then gcmr calls mapreducer to
set the global execution environment to be the default.
If a global execution environment currently exists,
then gcmr returns the last visible MapReducer object
created.
When you create a MapReducer object using mapreducer,
the object sets the global execution environment. The global execution
environment persists even if the object representing it is later deleted.
If the global execution environment is deleted or
invalid, then gcmr returns the next visible MapReducer
object available. For example, delete(gcmr) deletes
the current global execution environment.
The gcmr function defines the global execution
environment for mapreduce, and is most likely
used with Parallel Computing Toolbox™, MATLAB®
Parallel Server™,
or MATLAB
Compiler™.
If you do not specify a configuration to use in your call to mapreduce,
then by default mapreduce uses the configuration
returned (or generated) by gcmr.
mr = gcmr('nocreate') returns the current
global execution environment for mapreduce, if
one already exists. If no global execution environment exists, then gcmr returns [].
If you have Parallel Computing Toolbox, see the mapreducer (Parallel Computing Toolbox) function reference page for
related information.
If you have MATLAB
Compiler, see the mapreducer (MATLAB Compiler) function reference page
for related information.