1. Usecase Dynamo Moderate Requirements:
Modelling the turbulent dynamo in planets, stars and galaxies
(solving the induction equation with turbulent electromotive force)
Moderate Requirements:
some MB to few GB main memory, <= 10 GB of local disk space
Runtime: hours to days, Fortran90 code
Handling of plain files only
Concurrent start of multiple simulations with different input parameters

2. Preparation of Taskfarming
One directory for each model containing input parameter files and the executable
Job Description (XML file including data location and names of compute resources)

3. Status requests & monitoring:
Start Taskfarming
Submit Multi-Job
globusrun-ws –submit -b –f job.xml –J –S –o epr.xml
Status requests & monitoring:
globusrun-ws –status –j epr.xml
globusrun-ws –monitor –s –j epr.xml

4. Multi-Job Flowchart User Grid Resource grid- proxy- init Submit Multi-
XML
Multi-Job Description
Accept
Dele-
gate
1. Job
N. Job
single
File
Stage-In
Single-Job Descriptions
Execute
Task
Stage-
Out
Input
Data 1
Deliver
Data &
Request Files
Send Files
Output
Clean Up
Save
Send Output Files N
Handle
Status
Info
Provide
Monitoring
EPR
Request