Legacy Code Wrapping with GCM components

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Legacy Code Wrapping with GCM components

• Vincent Cavé
• Elton Mathias
• Guilherme Peretti Pezzi

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Deploy, Wrap, Couple and Compose

• Deploy
• Legacy application using GCM deployment
  descriptors
• Wrap
• Legacy processes in GCM components
• Couple
• ProActive/Native Interface API
• Compose
• Point-to-point, Collective, MxN communications

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Coupling ProActive/Native Interface

• The ProActive/Native interface define a
  lightweight API for
• Sending and receiving message from/to JAVA/native
  layer
• Communication with the ProActive/Native layer is
• Message-Based
• Generic
• Extensible
• Users build application protocol on top of the
  API
• Define type of message and layout
• Implement Messages and Handler interfaces.

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Use Case MPI integration

• Goal Deploy and Couple an MPI code over several
  clusters
• Deployment
• GCM components wrap MPI processes
• Components represent resources hierarchy
• Coupling of ProActive and MPI
• Done through The ProActive/Native API
• Definition of ProActiveMPI messages.
• Implementation of message handlers.
• Define the ProActiveMPI API
• Composition of MPI code Inter-cluster MPI
  communication
• Handle Point-to-point and collective operations
• Takes advantage of GCM collective interfaces
  (Gathercast/Multicast)
• Components bindings are (re)configured according
  to processes involved
• Could be generalized to more levels !

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Use Case An MPI Process as a component
MPI Process
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Use Case A cluster as a component
Wrapped MPI Processes
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