CMS Silicon strips operations and performance

The CMS silicon strip tracker is the largest silicon detector ever built with almost 10 million readout channels and an active area of close to 200 m$^2$. Its more than 15,000 individual silicon modules are powered by almost 1000 power supply modules and produce more than 60 kW of power while operating at low temperatures. Results from the successful operation of the tracker at the first LHC collisions at 0.9, 2.4, and 7 TeV, including environmental control, calibration, detector performance, and monitoring, are discussed. The detector performance is excellent, manifested in a nearly 100% functional tracker with high single hit efficiency, good S/N performance, and high quality track resolution. This is made possible by a fine-grained calibration process and a monitoring of all important quantities for the detector performance during different stages of the operation.