Developing message-passing applications on MPICH under ensemble

Testing and debugging message passing applications based on the synergy of program and specification executions

“…The script is structured in three main parts. [1].In [1]; Selector [2].Out[1] -> Server [2].Cin [1]; Server [2].Cout[1] -> Selector [2].In [1]; Selector [3].Out[1] -> Server [2].Cin [2]; Server [2].Cout [2] -> Selector [3].In [1]; Selector [4].Out[1] -> Server [3].Cin [1]; Server [3].Cout[1] -> Selector [4].In [1]; Selector [5].Out[1] -> Server [3].Cin [2]; Server [3].Cout[2] -> Selector [5].In [1]; Selector [6].Out[1] -> Server [3].Cin [3]; Server [3].Cout [3] -> Selector [6].In [1];…”

“…Selector [1]: "6"; Selector [2]:"999"; Selector [3]:"7"; Selector [4]:"8"; Selector [5]:"9"; Selector [6]:"5"; PARALLEL SYSTEM The second part of the script, headed by APPLICATION PARAMETERS, specifies process parameters required in the application. In the example script, each Selector is given an integer parameter.…”

“…The Ensemble methodology [2,3,4] was introduced for alleviating implementation complexities due to process management. Each MPE supports its own process model and consequently process topology management does not depend only on the design, but also on the target MPE.…”

Modular MPI components and the composition of grid applications

“…Similarly server [2] is grouped with terminal [2] and terminal [3] by associating TerminalGroup of server [2] and LocalGroup of terminal [2] and terminal [3] with symbolic group name TG2. Finally server [3] is grouped with terminal [4], terminal [5] and terminal [6] by associating TerminalGroup of server [3] and LocalGroup of terminal [4], terminal [5] and terminal [6] with TG3. Furthermore, server processes are grouped together by associating their ServerGroup with symbolic name Servers.…”

“…We have developed the Ensemble methodology [1,2,3,4] for designing and building message passing (MP) applications based on modular MP components and composition. We have developed tools for designing and implementing components, designing topologies, specifying allocation resources and generating composition directives.…”