Worldwide LHC Computing Grid

The Worldwide LHC Computing Grid (WLCG), formerly (until 2006) the LHC Computing Grid (LCG), is an international collaborative project that consists of a grid-based computer network infrastructure incorporating over 170 computing centers in 42 countries, as of 2017. It was designed by CERN to handle the prodigious volume of data produced by Large Hadron Collider (LHC) experiments.

By 2012, data from over 300 trillion (3×1014) LHC proton-proton collisions had been analyzed, and LHC collision data was being produced at approximately 25 petabytes per year. As of  2017 the LHC Computing Grid is the world's largest computing grid comprising over 170 computing facilities in a worldwide network across 42 countries scattered around the world that produce a massive distributed computing infrastructure with about 1,000,000 CPU cores, providing more than 10,000 physicists around the world with near real-time access to the LHC data, and the power to process it.

According to the WLCG Website as of 2024: "WLCG combines about 1.4 million computer cores and 1.5 exabytes of storage from over 170 sites in 42 countries [...] It runs over 2 million tasks per day and [...] global transfer rates exceeded 260 GB/s." Indicating substantial upgrades to WLCG over time beyond its initial release.

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