Title :
Upgrade of the CDF Run II Data Logger
Author :
Bizjak, I. ; Chlebana, F. ; Guglielmo, G.M. ; Masubuchi, T. ; McFarland, K. ; Sakumoto, W. ; Sarkis, R.E. ; Shimojima, M. ; Snider, F. ; Yu, G. ; Zhang, Dejing
Author_Institution :
Univ. Coll. London, London
fDate :
April 29 2007-May 4 2007
Abstract :
The Consumer-Server/Logger (CSL) is the final component in the CDF Data Acquisition chain before data are archived to tape. The CSL buffers data in separate data streams, records file meta information into a database and sends a fraction of events to online processors for real time monitoring of data quality. Recently, the CSL was upgraded in order to increase the logging capacity to 80 MB/s. The upgrade consists of commodity servers running Linux. A "Receiver node" distributes data via Gigabit Ethernet to eight parallel "Logger nodes" connected to external disk arrays via a Fibre Channel network. A redundant design and the availability of inexpensive large capacity disk arrays provides a highly available system that is scalable and easy to maintain. We present a description of the CSL upgrade and discuss the experience gained through commissioning to operations.
Keywords :
Linux; client-server systems; data acquisition; database management systems; high energy physics instrumentation computing; optical fibre LAN; particle detectors; real-time systems; CDF; CSL buffers; Collider Detector at Fermilab; Consumer-Server/Logger; Gigabit Ethernet; Linux; data acquisition chain; database; disk arrays; fibre channel network; logger nodes; logging capacity; online processors; real time monitoring; receiver node; redundant design; Bandwidth; Data acquisition; Data handling; Ethernet networks; Fault tolerant systems; Hardware; Linux; Network servers; Operating systems; Switches;
Conference_Titel :
Real-Time Conference, 2007 15th IEEE-NPSS
Conference_Location :
Batavia, IL
Print_ISBN :
978-1-4244-0866-5
Electronic_ISBN :
978-1-4244-0867-2
DOI :
10.1109/RTC.2007.4382823
