ICFA Report

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Quality Monitoring Framework (DQMF) was successfully run to process pre-recorded cosmic ray

data collected in ATLAS earlier in the year as part of the ATLAS commissioning milestone runs.

The next steps include tests directly at the remote site to read in byte-stream format data collected

at ATLAS and operate it in real-time through a T/DAQ setup known as a High Level Trigger

partition so as to directly replicate the online algorithms used at the time of data collection. The

potential use cases are presently being discussed with the ATLAS LAr monitoring coordinator

using the demonstrated remote processing at Alberta of the milestone data as the baseline for

discussions.

The group is also continuing the investigation of integrating the ATLAS High Level Trigger

Event Filter system with Grid technologies, thereby enabling the use of an even larger and more

diverse sets of resources, greater than would be possible for an entirely CERN-base system. Led

by the Krakow group the application of running remote farms on the Grid has been developed on

the basis of a pilot-job system that is used to perform the processing tasks of the ATLAS Event

Filter system. Initial tests based upon earlier versions of the ATLAS T/DAQ software releases

have been successfully tested between the testbed at CERN and remote processing nodes situated

in Poland. At NIKHEF the efforts have focused on modifications to the T/DAQ software that

would enable events to be tagged at the Level-2 component of the trigger decision and

subsequently routed to remote sites for expedited processing.

The next in the series of ATLAS commissioning milestones, known as M6, is scheduled for the

first quarter of 2008 and forms the target for the next phase in the development of remote

processing monitoring farms for LAr, the processing of data in real-time on the Grid, as well as

the testing of routing of events based upon bits being set within the trigger decision.