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Passive Object
A named static data repository with predefined operations. It contains multiple dynamically created and destroyed elements. A parallel application can consist of any number of passive objects. Once configured, any parallel application will have a static logical inter-component configuration. Application components generate/destroy dynamic elements in the static passive objects. This static inter-component configuration is used for automatic generation of application customized IPC agents and runtime configuration/optimization of the passive objects. Depending upon the physical networking infrastructure, runtime configuration of passive objects can greatly impact the parallel processing efficiency of the application.

Example I: A tuple space as a passive object. A tuple space (Ref: Linda) is an abstract datatype that allows three atomic operations: put, get and read.

Example II: A sequential file as a passive object. A sequential file allows read, write and seek operations.

Example III: A message queue as a passive object. A message queue allows send and receive operations.

Example IV: A database as a passive object. A database typically allows SQL or a subset of SQL statements to manipulate its contents.



Using Passive Objects, you can have the cake and eat it too!

 

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Last updated: October 01, 2001.