ELT: Standing on the Shoulders of Open Source and AlmaLinux
summary
ESO describes building the ELT control stack that coordinates 800 mirror segments with sensors and actuators, keeps surface error under 50 nanometers, and runs segment checks at 500 Hz on AMD EPYC CPUs. Control software is C C++ and Python, built with Waf, packaged on an AlmaLinux-based dev environment and rebuilt via Open Build Service. The team moves toward 100% open source, replaces CentOS with AlmaLinux for ABI stability, and reports real-time RTCs and dome/door control operating under tight latency constraints.
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chapters (7)
- 0:00Introduction to ESO
- 16:04ELT control software
- 25:14Why open source matters
- 28:25Custom Linux for ELT
- 33:22CentOS Stream challenges
- 36:59ESO contributions to open source
- 40:53Closing and Q&A
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