Publishing PVSS data on the Web FW WG 23rd April 2008

Content Current solutions Requirements Discussion Presentation title - 2

ALICE Current system: Requirements: Possible solutions No specific solution for web access. Current needs covered by remote access via terminal servers Requirements: No strong need for we publishing A main page with a picture of the detector to summarize states of high level CUs One page per detector with a few parameters Refresh time in the order of seconds Possible solutions Send data from DCS to ALICE logbook that has a web interface Presentation title - 3

LHCb Current system: Requirements: No specific solution for web access. Current needs covered by remote access. Requirements: Publish summary information Publish PVSS panels Ideally without modifications Allow for navigation between panels, but not commands Presentation title - 4

ATLAS Current system: Combination of two sources: PVSS web server used to extract FSM information Screenshots of some specific panels Taken every minute Using PVSS imageToFile Information is combined in the ATLAS web server NFS mount to get files (images + data) PHP scripts Access open to everyone Presentation title - 5

DCS PVSS distributed system ATLAS DCS PVSS distributed system PVSS machine PVSS web server 4 Uis managers (1 per CPU) with several threads Web server Presentation title - 6

ATLAS Presentation title - 7

ATLAS Requirements: Scalability: Currently only one server machine that can handle ~50 panels Lighter mechanism (e.g. some HTML rather than images) Open historical trends on demand (e.g. with a right click in the web page) Presentation title - 8

CMS Current system: Publication of FSM states Publication mechanism DIM client connects to FSM processes Transfer to web server via RMI (Java RPC) Caching mechanism Display JSP application (connects to publisher via RMI) Oracle web server Access open to everyone Presentation title - 9

DCS PVSS distributed system CMS DCS PVSS distributed system Publishing machine DIM client connected to FSM processes Java RMI Oracle web server (J2EE/Apache) Presentation title - 10

CMS Presentation title - 11

CMS Requirements: Possible solutions Display of PVSS panels Only navigation, without commands Integrate Access Control Synchronised with LDAP server Possible solutions Look at PVSS JAVA UI Oracle Portal Presentation title - 12

Common needs? Display of summary information Show PVSS panels and navigate through them Small set regularly The rest on demand Don’t allow commands to be sent Scale Users: ~100 Refresh: ~60 seconds Presentation title - 13

DISCUSSION Presentation title - 14