  In the first LHC running period the CMS-pixel detector had to face various
operational challenges and had to adapt to the rapidly changing beam
conditions. In order to maximize the physics potential and the quality of the
data, online and offline calibrations were performed on a regular basis. The
detector performed excellently with an average hit efficiency above 99% for all
layers and disks. In this contribution the operational challenges of the
silicon pixel detector in the first LHC run and the current long shutdown are
summarized and the expectations for 2015 are discussed.
