Go to Home Page
Scientific Program
Docs by topics
Social events
Conference location
 • Grid WShop & Tutorial
 • Grid Program
 • Visiting Padova
 • INFN Padova
 • University of Padova
 • CHEP: '94 '95 '97 '98

Last update: Apr 1, 2000

to first abs  to previous absby abs number to next abs  to last abs


to first abs on this KT  to previous abs on this KTon same keytopic to next abs on this KT  to last abs on this KT


Event data storage and management in STAR

Victor Perevoztchikov
 Brookhaven National Laboratory

Speaker: Victor Perevoztchikov

  The Solenoidal Tracker At RHIC (STAR) is a large acceptance collider detector, commissioned for operation at Brookhaven National Laboratory in 1999. STAR is designed to measure the momentum and identify several thousand particles per event. About 300 Terabytes data will be generated each year. To handle the volume and complexity of STAR data, sophisticated data structures, persistency mechanisms and data management tools have been developed. STAR employs a C++ transient data model with an interface independent of persistency mechanism. Its underlying implementation employs ROOT I/O (partially modified to meet STAR requirements) to provide very flexible persistency, including management of relations between objects and between event components stored on different files. STAR modifications to ROOT I/O support schema evolution of data structures. Data persistency tools are complemented by MySQL-based management of metadata, data locality and event tags. In this paper we present an overview of these facilities and our experience with maintenance and evolution of large and complex OO data structures.

Presentation:  PowerPoint Short Paper:  Adobe Acrobat pdf 

  | Top | Home | Bulletins | Committees | Scientific Program | Docs by topics | Social Event | Conference Location | Secretariat |