UNICORE Target System Access

Products

The UNICORE Target System Access PT manages two products

• UNICORE XNJS (Grid manager)
• TSI (Perl daemon installed on the frontend of the resource)

The UNICORE target system access comprises two components: the eXtensible Network Job Supervisor (XNJS) and the target system interface (TSI). The XNJS is the central execution management component. It is currently used as a component in the UNICORE/X server. It accepts jobs from the upper web service layers, parses the job description and generates site-specific scripts for performing specific tasks like creating a directory or submitting a batch job. These scripts are sent to the TSI component, which is a Perl daemon running on a frontend node of the target resource (usually a cluster or HPC system, but can also be a single computer). In general, XNJS and TSI run on different machines and communicate via sockets (with optional SSL). Multiple XNJSs can use the same TSI, and multiple TSIs can be connected to the same XNJS, allowing for load-balancing configurations.

For each supported batch subsystem, a variant of the TSI component exists, usually only small modifications are needed. Currently, the supported batch systems are:

• Torque
• LoadLeveler
• SLURM
• Sun GridEngine
• Condor (very basic support)
• No-batch (jobs are forked)

Members

* Bernd Schuller (Juelich)

-- BerndSchuller - 19-Jul-2010