Documentation

FAQ

What type of experiments is SEGL designed for?
At first, SEGL is a workflow system, which allows to describe and run an complex computational experiments on distributed HPC resources. Such complex experiment may have next features:

  • experiment consists of a large number of sub-tasks
  • subtasks of experiment are dependent on each other
  • some sub-tasks may be executed in parallel or sequentially
  • when experiment should be executed with several input data sets
  • when experiment has dynamically created datasets in runtime
  • when sub-tasks of the experiment should be executed on different computing resources
  • when there are may be several iterations in the experiment and the number of iterations is depend on the data in runtime.

What resources does SEGL use?
Now SEGL is installed in the HLRS Stuttgart and it uses computing resources of HLRS and also SEGL system is integrated in bwGrid Portal (http://www.bw-grid.de/portal/).
To add a new computing resource to the SEGL, there are several requirements:

  • SEGL system needs an SSH access to the resource
  • PBS should be installed on the resource
  • SEGL needs an simple user account on the resource
  • SEGL-Agent (java application) should be installed on the resource

Who may use SEGL?
The SEGL system may use a user that has an SSH access to the resources that uses SEGL (see question “What resources does SEGL use?”).

How can I try SEGL?
To try SEGL start the Demo version of SEGL. Demo version of SEGL has a lot of predefined modules and experiment models that you can reuse, you can start the experiment and it will be executed on a single machine. So in Demo version there are no HPC resources, here you can just try the SEGL Client and understand how to describe an experiments.
Examples of experiments you may find in sections “Learn” (video lessons) and “Documentation->Tutorials”.

Can I describe my own experiment in SEGL-Demo?
You can’t create new modules. So you may only create new experiment model using predefined modules.
Examples of describing of experiments you may find in sections “Learn” (video lessons) and “Documentation->Tutorials”.
Detailed user documentation is in section “Documentation->SEGL user documentation”.

How can I install SEGL in my organization?
The SEGL system is a science research project of the University of Stuttgart. The SEGL is installed in HLRS. And we don’t provide SEGL installation packages.
If you have a big interest to the SEGL system, contact us via This email address is being protected from spambots. You need JavaScript enabled to view it. to discuss the possibilities.

Where can I download SEGL source code?
The SEGL source code is not open for everyone. So if you have interest contact us This email address is being protected from spambots. You need JavaScript enabled to view it. .