ARC Remote EXecution service

 NorduGrid is a collaboration aiming at development, maintenance and
 support of the free Grid middleware, known as the Advanced Resource
 Connector (ARC).
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 The ARC Resource-coupled EXecution service (AREX) provides a service
 for the execution of compute jobs - also known as a Compute Element.
 A-REX also handles transfer of input and output data, as well as
 input data caching to minimise data traffic.