https://docs.hpc.gwdg.de/categories/downtime/index.htmlHugoenhttps://docs.hpc.gwdg.de/support/recent_upcoming_changes/emmy_p4_mdc_downtime/index.htmlMon, 01 Jan 0001 00:00:00 +0000https://docs.hpc.gwdg.de/support/recent_upcoming_changes/emmy_p4_mdc_downtime/index.htmlStarting early on the 14th of August 2026, the whole Modular Data Center (MDC) will be taken offline for essential maintenance and construction required for the upcoming cluster island Emmy Phase 4. What will happen and how will it affect users? During this transition: Most of Emmy Phase 2, including the standard96, large96 partitions and all variants, will be permanently retired, disassembled and removed. Some hardware in the large96 partition will be kept, but will not be available during construction. The legacy SCC medium partition will be permanently decommissioned. The legacy SCC login nodes gwdu101-102 aka. login-mdc.hpc.gwdg.de will be retired (but the hardware will be repurposed under a different name). JupyterHPC will operate with heavily reduced capacity, as most of the V100 and RTX5000 nodes will be decommissioned and other nodes will be unavailable during the downtime. The lustre-mdc filesystem will be inaccessible. Limited access to the Future Technology Platform. The power and cooling infrastructure of the MDC will be fully overhauled, refurbished and expanded to accommodate the new hardware. New hardware will be installed, tuned and benchmarked. The retirement of Phase 2 and the legacy SCC medium partition will significantly reduce the available compute hardware and will lead to much higher load on the remaining Emmy Phase 3 nodes in the medium/standard/large96s and scc-cpu partitions. We expect a severe increase in queue sizes and thus waiting times before jobs will start until the new hardware comes online.