**6.2.2 Concluding remarks - WLCG**

The experience from the first year and a half of the LHC data taking implies that the WLCG has built a truly working grid infrastructure. The LHC experiments have their own distributed models and have used the WLCG infrastructure to deliver Physics results within weeks after the data recording which has never been achieved before. The fact that a significant numbers of people are doing analysis on the Grid, that all the resources are being used up to the limits and the scientific papers are produced with an unprecedented speed is proving an evident success of the WLCG mission.

#### **6.3 ALICE performance**

To conclude this section, we will briefly summarize the experience and performance of the ALICE experiment. ALICE started extremely successfully the processing of the LHC data in 2009: the data collected during the first collisions delivered by the LHC on November 23rd (2009) got processed and analyzed so fast that within one week the article with the results from the first collisions was accepted for publication as the first ever scientific paper with the Physics results from the LHC collisions [65].
