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Welcome to the LHCb Online web

This web-site collects information for the operation of the LHCb Online system. More specifically for the central and shared Online services, which are used by all sub-detectors and which are required to run the entire experiment. If you are a new user in LHCb, a shifter or a piquet, this one is (should be) a good starting point.

The amount of material on this web is quite big and we are painfully aware that the structure is far from perfect. Work is in progress to improve this. Please be patient or even better: help.

The material on this top-page is of interest for any user of the Online system. In addition you will find here specialised sub-webs dedicated to System Administration the Online on-call shifter: OnlinePiquet and R&D projects in Online computing by members of the Online team.

Working from home

Since the LHCb Online network is not directly accessible from the internet working from home is not as straight forward as logging into CERN. Here we explain the recommended ways to access the Online system from outside. The minimum requirements are that you have a computer running Linux, Mac OS-X or Windows in a reasonably recent version, an internet connection and a valid CERN account, which allows you to login into lxplus.

The LHCb Online system has both Linux and Windows machines. On Linux tasks can often be achieved from the command line (ssh) alone, but some tasks, in particular PVSS panels require a graphical session. On Windows the possibilities of the command-line are severely limited (crippled some people would say) and for experts only, so graphical remote sessions are the only option. All these options from and to all OS-es will be explained here. The explanations here are sorted by the remote (i.e. home) operating system.

Understanding the system

The LHCb Online system consists of several large systems, which are intimately connected: the DataAcquisition (DAQ) with its private network, the ExperimentControlSystem, the HLTFarm, the OnlineMonitoring

Working with the raw-data

More Stuff

Online Web Utilities

NikoNeufeld - 28 Apr 2011
Topic revision: r166 - 2022-09-28 - NikoNeufeld

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