1. Application Programmers view
Application code (app.c)
Grid
initialization();
for (i=0; i<N; i++){
T1 (“file1.txt”, “file2.txt”);
T2 (“file4.txt”, “file5.txt”);
T3 (“file2.txt”, “file5.txt”, “file6.txt”);
T4 (“file7.txt”, “file8.txt”);
T5 (“file6.txt”, “file8.txt”, “file9.txt”); }
T10
T20
T30
T40
T50
T11
T21
T31
T41
T51
T12 …
Application Programmers view
Simple sequential programming
C/C++, Perl
Objects: local files
Execution resources: unknown
Workflow engine features
Data dependence analysis
File renaming
File transfers when required
Task scheduling
Resource brokering
Task level checkpointing
GT2 enabled
app.idl
Client
Server
gsstubgen
app.c
app-functions.c
app-stubs.c
app-worker.c