Creation of a central database of Monte-Carlo events is motivated by simulation needs which are specific to the high energy physics domain. In general, the correct and reliable Monte-Carlo simulation of complex processes requires rather sophisticated expertise. Often, different physics groups in various experimental collaborations approach the same experts and authors of Monte-Carlo event generators in order to prepare Monte-Carlo event samples for a particular physics process. If these events are stored in a public place along with the corresponding and comprehensive documentation, it helps to verify the samples and compare different Monte-Carlo models, and prevents то squander computing resources and, especially, precious human time.

Main LCG MCDB Features

  • Content Management System with a powerful and flexible Web interface for authors of event samples
  • Tree graph of directories with articles published in MCDB to browse the database
  • Power search engine based SQL/XML
  • CASTOR as the native storage for the MC samples
  • Direct uploading of one or several files from AFS/CASTOR/GRID to LCG MCDB
  • Direct downloading of files from LCG MCDB via Web/CASTOR/GRID (URI)
  • Flexible and reliable authorization system based on CERN AFS/Kerberos logins or LCG GRID certificates
  • SQL structure of documentation on the event samples
  • Backup of the stored samples and corresponding SQL information
  • API to the LHC collaboration software environments
  • HepML. A unified and flexiable format for event files ( more details)

LCG MCDB Web-server


CMS MCDB TWiki page


Information for users

On-line help and How-to for authors



Short Dictionary

Publications about MCDB

API to Collaboration software

CMSSW interface

Technical information
* SVN MCDB Repository

* Parameters describing event samples in LCG MCDB

* XML Schema of LCG MCDB article (a part of HepML)

* Status Report



* Developers documentation

Other document
* Summary for the MC4LHC workshop
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Topic revision: r13 - 2012-04-04 - LevDudko
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