Here we present some applications packaged with the XtreemOS releases.

These applications have been executed successfully on XtreemOS demonstrating how applications can benefit from specific node-level and Grid-level features. Feel free to use these applications which are available from all available mirrors in the media/main/updates/ sub-directory. To install the applications, please follow the update process described in the XtreemOS guide.

Two applications are shipped with the current release. Further applications will be added soon. If you have succeeded installing further applications and wish to share them with other users please contact us: contact@xtreemos.eu

Galeb

Galeb is a command-line utility that tries to find an expression (an elementary function) that best describes the given data. It can be used in nonlinear time series analysis and prediction, econometric finance modelling etc. Galeb uses a genetic algorithm to construct an analytical model (a function) that minimizes the mean square error for a given time series. It is written in C++ and uses the GaLib library. Given enough time and a time series that can be modelled by an elementary function, Galeb will find the exact solution. As multiple independent runs of the genetic algorithm are typically needed to produce a good solution, the computation can be parallelized efficiently using a single master process that distributes the work to multiple slaves and collects their results through System V IPC message queues.

Galeb has in the past also been parallelized for grid systems using Globus. A prototype XtreemOS version with grid-level parallelism has also been developed using xos-ssh, but it is no longer supported. A version following the XtreemOS programming paradigm is planned within a few months.

IMA

IMA is an instant messaging application oriented to facilitate the typical user tasks related to XtreemOS such as:  registration in a VO, storing the configuration files and logs of the conversations in the grid (XtreemFS).  Advanced features like file sharing and the possibility of including every member of the VO as contact are also being analyzed. It will be available with XtreemOS 2.1 version for mobile devices.

jCAE

jCAE is an extensible CAE (Computer Aided Engineering) platform. In its open source version, jCAE is a Netbeans application made of a simple CAD modeler, a CAD surface mesher and an interactive 3D viewer. The CAD modeler has its roots in the OpenCASCADE framework and is able to combine simple objects (boxes, cylinders, torus, ...) through boolean operations in order to build complex objects. The mesher is able to generate triangle based meshes from the CAD definition. The interactive viewer is based on the Visualization Toolkit (VTK) and provide capabilities for navigating in both CADs and meshes. What makes jCAE mesher unique is its ability to work out-of-core ; it is therefore able to generate huge meshes (up to several hundreds millions of cells). jCAE has already been extended to connect to proprietary solvers (acoustics) providing an end-to-end dedicated problem solving environment. Will be available with XtreemOS 2.0.

JobMA