Parallel MATLAB and Logging

Question

I am running an experiment distributed across multiple computers using the Parallel toolbar. I want to be able to create a log about the progress of the experiment (or any error) and save this information in a file while the processes are running. What is the standard way to do this?

EDIT:

• I use an awkward parallel.
• I want only one file for all workers (I have a network drive that can be accessed from the whole machine)

My main concern is to open the file for adding by several employees. Can I lose messages or get an error message?

Answer 1

, , . (, C), , MATLAB, , . , ...

, - ( "" ), "master" (.. "" ) .

, , . , MATLAB. , (process_fcn) :

• "master" . ( labindex process_fcn:

  if (labindex == 1),
    fid = fopen('log.txt','at');  %# Open text file for appending
  end
  

• , , , data​​strong > , . , try-catch , .

• process_fcn ( , ), , (.. ), "" . "" . , ( labBarrier, labProbe, labSend labReceive):

  labBarrier;  %# All processes are synchronized here
  if (labindex == 1),  %# This is done by the "master"
    if ~isempty(data),
      fprintf(fid,'%s\n',data);  %# Print "master" data
    end
    pause(1);  %# Wait a moment for "slaves" to send messages
    while labProbe,  %# Loop while messages are available
      data = labReceive;  %# Get data from "slaves"
      fprintf(fid,'%s\n',data);
    end
  else  %# This is done by the "slaves"
    if ~isempty(data),
      labSend(data,1);  %# Send data to the "master"
    end
  end
  data = '';  %# Clear data
  

  PAUSE , labSend "" , "" .

• , "master" . process_fcn:

  if (labindex == 1),
    fclose(fid);
  end
  

Answer 2

, ( ) , , taskFinish.

- , MATLAB, , .