Investigated mixed cluster options with multiple queues for Torque. Brief test of OMP - successful. Started investigating MPI. Fixed an issue with SAGrid: The WMS had lost access to the internet due to a proxy change hence CRL downloads were failing. This resulted in an end point failure when users attempted to create proxies. This has now been fixed and CRLs are once again being downloaded. GLite services have been restarted and users can now delegate proxies.