21st International Conference on Computing in High Energy and Nuclear Physics (CHEP2015)

Evolution of the Open Science Grid Application Software Installation Service (OASIS)

Not scheduled

15m

OIST

poster presentation Track4: Middleware, software development and tools, experiment frameworks, tools for distributed computing

Speakers

Brian Paul Bockelman (University of Nebraska (US))Dr Jose Caballero Bejar (Brookhaven National Laboratory (US))

Description

The Open Science Grid Application Software Installation Service (OASIS) provides an application installation service for Open Science Grid (OSG) virtual organizations (VOs) built on top of the CERN Virtual Machine File System (CVMFS). This paper provides an overview and progress report of the OASIS service, which has been in production for over 18 months. OASIS can be used either directly, as a service run by OSG Operations, or as a standalone software product. In either use case, the VOs' files feed into a network of Stratum One replication servers, along with other partners within a federation. The OASIS network has the flexibility of providing pure CVMFS repositories, the OSG-run central OASIS repository, or VO-run OASIS repositories. Depending on their needs, VOs can integrate into OASIS at several different points, leading to a more complex trust model than that of the standard CVMFS service. This paper describes the evolution of usage and implementation of OASIS over the past 18 months, as well as its operational successes, evolutions and issues. Topics such as monitoring and auditing of the distributed content, handling of cryptographic keys, and establishing technical and organizational trust relationships are discussed.