TiersAtRAL < Atlas

---+ Introduction
This page briefly explains what the ATLAS computing model is, what facilities are avaliable at RAL and how ATLAS users can access them.

---+ The ATLAS computing Model


*Tier 0* This is CERN where the raw data will be produced.  This is archived at CERN before being distributed to the Tier 1s.

*Tier 1* There are around 10 Tier 1s serving ATLAS.  

*Tier 2*

*Tier 3*

This page explains the computing model and the hardware that is avaliable at RAL.

---+ Tier 1
The Tier 1 for the UK cloud is based at RAL.  The Tier 1 is in the machine room in building R89.

---+ Tier 2/3
As well as the Tier 1 there is a Tier 2 cluster also based at RAL however it is in a different building from the Tier 1 and run by different people.

-- Main.AlastairDewhurst - 2009-10-09

This topic: Atlas > WebHome > TiersAtRAL
Topic revision: r1 - 2009-10-09 - AlastairDewhurst