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Accessing DIP from the Online network

Accessing the Data Interchange Protocol (DIP) External link mark requires a connection to the CERN GPN and TN. This is in general not possible for machines on the LHCb experiment network. The access to DIP is done via a specific API-manager called PVSS00Dip. Since this manager needs access to the GPN and TN it has to run on a dedicated machine diptn01 and it connects to the event and data managers on user PVSS system. In PVSS terms this is called a "scattered" project. The procedure to get it running there is listed below.

How to use DIP in your PVSS system

  • Install the PVSS00Dip External link mark framework component
  • Make sure not to start the PVSS00dip manager (go to manager properties, click manual)
  • Send a mail with the port numbers of your event-manager and your data-manager to the Online helpdesk

Troubleshooting (READ THIS FIRST)

It is an unfortunate feature of PVSS that scattered managers do not reconnect when their event-manager is re-started. If you restart your project, you must restart your PVSS00dip manager on diptn01

How to restart PVSS00dip

  • Open the PVSS web-console External link mark on diptn01. (works only from within the LHCb Online network)
  • Select your manager (identified by the -data -event options with your port numbers and server name)
  • Restart it. Check the timestamp in the 5th column (Starttime) to verify that the manager has actually restarted. If a Stop does not seem to do the trick, then send a Kill to the manager. Verify that it starts up. Otherwise send a Start command.

Problems accessing DIP

  • Use the DIP browser, which is part of the PVSS00Dip component
  • Send a mail to the Online helpdesk, specifying DIP problem in the subject

-- NikoNeufeld - 26 Nov 2008

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Topic revision: r6 - 2010-01-21 - gary

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