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Scientific Python
Package Scientific :: Package DistributedComputing :: Module MasterSlave :: Class SlaveProcess
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Class SlaveProcess

object --+
         |
        SlaveProcess

Slave process in a master-slave setup

A concrete slave process in a program is implemented by subclassing this class and adding the methods that handle the computational tasks. Such a method has the name "do_" followed by the tag of the computational task. The process is then launched by calling the method "start".

Instance Methods
 
__init__(self, label, master_host=None, watchdog_period=120.0)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature
 
processParameter(self, parameter)
 
start(self, namespace=None)
Starts the slave process.
 
terminationTest(self)
 
watchdogThread(self)
This method is run in a separate thread that pings the master process regularly to signal that it is still alive.

Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Properties

Inherited from object: __class__

Method Details

__init__(self, label, master_host=None, watchdog_period=120.0)
(Constructor)

 

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Parameters:
  • label (str) - the label that identifies the task manager
  • master_host (str or NoneType) - If None (default), the task manager of the master process is located using the Pyro name server. If no name server is used, this parameter must be the hostname of the machine on which the master process runs, plus the port number if it is different from the default (7766).
  • watchdog_period (int or NoneType) - the interval (in seconds) at which the slave process sends messages to the manager to signal that it is still alive. If None, no messages are sent at all. In that case, the manager cannot recognize if the slave job has crashed or been killed.
Overrides: object.__init__

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Scientific Python
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