Experimental Physics User's Guide

The scientific computing environment for experimental physics is comprised of a data analysis facility and its accompanying mass storage system. Details on the hardware are in the Scientific Computing Resources book.

The data analysis environment includes the batch "farm" (a compute cluster) plus its associated interactive nodes and disk storage systems.  Multiple files systems are accessible from both the interactive and batch nodes, and some of these are also accessible from desktops onsite.

The compute cluster is  managed by JLab's in-house Auger software, which uses the PBS/Maui batch system and scheduler as a job execution engine. Auger interfaces to the online and offline storage subsystems to move files between disk and a robotic tape library.

Swif, a newly released workflow system, allows users to carry out large data analyses efficiently by grouping many jobs into a workflow and by scheduling jobs according to input file locations on one or more tapes. In addition, Swif provides phased job release to Auger, and ease of job modification, re-submission, recall and cancellation, and delivers detailed job metrics during and after a workflow.