After years of development, the CMS distributed computing system is now in
full operation. The LHC continues to set records for instantaneous luminosity,
and CMS continues to record data at 300 Hz. Because of the intensity of the
beams, there are multiple proton-proton interactions per beam crossing, leading
to larger and larger event sizes and processing times. The CMS computing system
has responded admirably to these challenges. We present the current status of
the system, describe the recent performance, and discuss the challenges ahead
and how we intend to meet them.Comment: Contribution to Proceedings of the DPF-2011 Conference, Providence,
RI, August 8-12, 201