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

2. Content Current solutions Requirements Discussion
Presentation title - 2

3. 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

4. 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

5. 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

6. 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

7. ATLAS
Presentation title - 7

8. 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

9. 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

10. 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

11. CMS
Presentation title - 11

12. 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

13. 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

14. DISCUSSION
Presentation title - 14