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The paper presents an overview of the current research and achievements of the DEISA project, with a focus on the general concept of the infrastructure, the operational model, application projects and science communities, the DEISA Extreme Computing Initiative, user and application support, operations and technology, services, collaborations and interoperability, and the use of standards and policies. The paper concludes with a discussion about the long-term sustainability of the DEISA infrastructure.

The Security for Collaborating Infrastructures (SCI) group is a collaborative activity of information security officers from several large-scale distributed computing infrastructures, including EGI, OSG, PRACE, EUDAT, CHAIN, WLCG, and XSEDE. SCI is developing a framework to enable interoperation of collaborating Grids with the aim of managing cross-Grid operational security risks and to build trust and develop policy standards for collaboration especially in cases where we cannot just share identical security policy documents.

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