LCG Monte-Carlo Events Data Base: current status and plans MCDB team: S. Belov L. Doudko S. Makarychev A. Sherstnev S.Belov, JINR, Dubna on behalf of LCG MCDB group

Overview Motivations To Provide Configuration, Book-keeping, Documentation, Storage for the Shared Monte-Carlo Event Files To keep track of the full generation chain, Exploiting the Competences of Monte Carlo Experts and Monte Carlo Authors CMS MCDB [hep-ph/0403100] http://cmsdoc.cern.ch/cms/generators/mcdb/ Only parton level files; AFS storage; No Searchable; No SQL LCG MCDB proposal [hep-ph/0404241] http://mcdb.cern.ch Same authors + Additional human resources and technical support Core software supported by LCG Software Project Infrastructure MySQL; CASTOR (RFIO); CGI; Perl; Apache 1

Terminology Article – a document describing a set of event samples. The documents are the main Web content of MCDB Category – a class of articles and physics models concerned a particular type of physical processes. It corresponds to leaves in MCDB Web catalog Author – an expert in Monte-Carlo generators. (S)he can upload new event samples to MCDB and describe them in corresponding articles Moderator – a person who has privileges to manage author profiles and moderate any information in the database 2

MCDB Scheme Web site Administrator API Moderator Application software Authors management Article Search in DB Comment articles Download Author registration Administrator Metadata DB: SQL database Event samples storage: local discs, CASTOR, etc API Moderator Upload Application software Author End-user 3

Ready for tests by end-users Short MCDB Status Articles Management (done) Event Files management (done) Authors management (done) Users comments management (done, not tested) Authorization block (done 95%) Search engine (done 30%) Documentation (done 20%) Ready for tests by end-users 4

End-users: browse catalogue, read articles 5

End-users: Search for articles 6

End-users: Download event files 7

End-user: leave comments on articles 8

Registration as MCDB author 9

Article management (done) The article management system provides a clear Web interface to document event samples Allows to use pre-entered information to describe MC generators, physics models, cuts, etc. in articles Permits to edit previously created articles Preview and then publishing documents to the Web Articles are presented in a very structured way 10

Event Files Management (done) Event files are stored on CASTOR Upload and download are realized through the Web MCDB uses server local discs for files cashing (to/from CASTOR) GRID and API interfaces (in the future) 11

Author authentication and access control system Based on CERN AFS passwords Checks whether author is registered in system and user’s privilege (author/moderator) Moderator is able to block author accounts if necessary Grid-certificates based authorization: in the future 12

Some technical details MCDB was ported to SLC3 - Installation of all nessesary software and packages - Detailed instruction on MCDB setup from the beginning Registered MCDB accounts - CASTOR : mcdbsupp, now 1Tb space on tapes - lxplus Savannah project page http://savannah.cern.ch/projects/mcdb Slightly modified SQL tables structure CVS tree cleanup 13

Conclusion: working prototype is ready We have a working version of MCDB - Basic Web functionality is supported - Event files stored on Castor - Deployed on http://mcdb.cern.ch (under CERN Scientific Linux) - system needs “external“ testing 14

Future plans Documentation (end-users, developers) Model conception refining (physical models, generator models, variable parameters, etc.) Application Package Interface - API for collaborations software - Grid interfaces (POOL, Grid users’ certificates) Development uniform event format (HEPML realization) 15