Today is a special day for CERN; it marks the end of run of the Large Hadron Collider (LHC), along with the reach of the 100 petabytes' milestone of data stored by CERN's data centre, the equivalent of roughly 700 years of Full-HD quality movies.
The LHC will stop running for maintainance till 2014, however, the enormous data produced from the experiment and stored at the data centre will continue to be processed and analysed.
You can find more information about the LHC and the LS1 (maintenance period) below:
To know more about the way the data are collected, stored, shared, analysed, and about the Worldwide LHC Computing Grid (WLCG), you can watch the CERN Hangout Videos listed below:
CERN Video