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The Tier-1 operations are structured in 4 groups: the computing farm is man-aged by the Farming group; the Mass Storage System, the databases and thetransfer the transfer service are managed by the Data Management group; the LAN and WAN connections of CNAF are managed by the Network group and, last butnot but not least, the facilities of the center are managed by the Facility Management group. Besides these groups, the User Support group takes care of helping theusers the users to efficiently exploit the Data Center infrastructure.
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