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FedCloudJAMSPoC

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Revision as of 19:28, 13 December 2014 by Scardaci (talk | contribs)
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General Information

  • Status: active
  • Start Date: 27/05/2014
  • End Date: 18/09/2014
  • EGI.eu contact: Diego Scardaci / diego.scardaci@egi.eu
  • External contact: Christian Fischer / christian.fischer.2@uni-jena.de

Short Description

JAMS is an java-based, open-source software platform that has been especially designed to address the demands of a process-based hydrological model development and various aspects of model application (https://appdb.egi.eu/store/software/jams).

JAMS is a framework to build up complex models out of simple components. Several hydrological models were implemented within JAMS (e.g. J2000, J2000g). Usually those models are applied to simulate hydrological dynamics in catchments with a size of 1km² to 100,000 km² in a temporal time step of hours to months. Typically, the computing time of a single model run is in the range from minutes to hours (on a single workstation). However, those models have many parameters, which must be estimated indirectly during a calibration process. For model calibration an evolutionary optimization algorithms was adopted, which evaulate the model several thousand times. Therefore this calibration process takes days to weeks on a single workstation. To speed up this process, we implemented a thread-based parallelization in JAMS. This thread-based parallelization is used for example to evaluated several parameter combinations in parallel during optimization. The model calibration is carried out frequently. Sometimes more than 10 times a week.

Use Case

Run JAMS on the EGI Federated Cloud

Requirements:

  • 1 VM with linux operating system and a (oracle) java runtime environment
  • more than 16GB memory
  • 8 or more computing cores (since parallelization is thread-based)

Outcome

Additional Files