Monitoring the Availability of Grid Services Using SAM and Gridview

Abstract

The Grid Middleware consists of a set of Grid Services like Computing Element (CE), Storage Element (SE), Resource Broker(RB), Replica Catalog (RC), Information System (IS), User Interface (UI) etc. The Availability and Reliability of these Grid Services is critical to the functioning of Grid Infrastructure. This paper describes Service Availability Monitoring (SAM) and GRIDVIEW, two complementary tools developed for monitoring the Availability of Grid Services and various sites in the Worldwide LHC Computing Grid (WLCG). The SAM Framework launches periodic tests at various service instances to check their status. Using these test results, Gridview’s summarization module computes the Availability of individual services and the overall availability of various sites. Gridview’s Visualization module displays Graphs and Reports indicating the Availability of various sites and services.