List of Grid Topology information sources

In this document we try to compile the list of existing sources of information about Grid Topology.

The List


  • Description: registration database for EGEE sites
  • Type of information:
    • Sites with all administrative information, contact details, certification status, type (Production/PPS) and site-BDII URI
    • Nodes associated to sites (many-to-one) with general information about provided services (CE, SRM, not clean...)
    • Services - only "node type" tags attached to Nodes, no detailed information (supported VOs, endpoints, etc.)
    • Higher level of administrative structure for sites: ROCs, Countries, other groupings
    • Scheduled Maintenance information for targets on ROC, Group, Site, and Node level
  • Originator:
    • most of information entered manually by site admins,
    • basic details approved (on registration only!) by ROC representative,
    • certification status set only by ROC/COD representative
  • Updates: manual, not frequent, not regular, not always reliable


  • Description: policy enforcement tool for VOs
  • Type of information:
    • BDII exclusion settings - VO usage policy for service instances like: (LCG) CE, gLite-CE, SE. Can be one of: always (Yes), never (No), according to SAM tests(SAM). Additional flag if scheduled downtime should trigger exclusion
    • Central services selection - simple Yes/No flags per VO for instances of services like: LFC, FTS, ... (what is the meaning?)
    • Critical tests selection - selection of critical tests per VO for each type of service
  • Originator: VO managers or delegated representative
  • Updates: manual, not frequent, not regular, quite reliable

WLCG List of Tier1/2 sites

  • Description: static list extracted by WLCG management from MoU
  • Type of information: a single tag for each site about its 'tierness': 0, 1, 2 or none (3) ?
  • Originator: WLCG management
  • Updates: manually inserted into SAM DB upon request from WLCG management


CIC Portal

  • Description: ?
  • Type of information:
    • Virtual Organisations
    • ?
  • Originator: VO managers, ?
  • Updates: ?

LHC experiments





OSG Registration DB

Any other?

-- PiotrNyczyk - 18 Feb 2008
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Topic revision: r2 - 2008-02-20 - PiotrNyczyk
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