Collaborative environment and workflow decomposition for remote instrumentation Roberto Pugliese ELETTRA - Sincrotrone Trieste SCpA On Behalf of the GRIDCC Collaboration BoF - Remote Instrumentation Services in Grid Environment (RISGE) OGF20 - Manchester 7-9 May 2007
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Collaborative environment and workflow decomposition for remote instrumentation
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The GRIDCC Project The GRIDCC - Grid Enabled Remote Instrumentation with
Distributed Control and Computation (www.gridcc.org) It is a 3-years EU FP6 project started in September 2004 Define and implement the “Instrument Element” to allow a
standard remote access to any type of sensors and instruments Tight integration between instruments and the eInfrastructure Complex workflows integrating instruments, computational and
storage resources Human Computer interaction via Virtual Control Room groupware
tools that support distributed and heterogeneous teams of people in the collaborative access to the extended eInfrastructure
Instrument Element Requirements Interactive access to allow control and monitoring Standard interface to the physical devices Fast publishing of the data acquired by instruments Fast information (logs, errors, etc.) publishing to
track the behaviour of instruments and possibly solve problems
Quality of Service and Advanced Reservation Computing Grid integration
Move data from instruments to the Grid storage resources (Storage Element) and viceversa
Process data produced by instruments using Grid computing resources (Computing Element)
Instrument Discovery The discovery of the instruments or of the IEs is an issue when the number
of elements is high We can have two use cases:
Quasi static case The number of IEs is well defined In this case a register based discovery mechanism can be used. GRIDCC tesbed is using the LCG BDII (Berkely Database
Information Index ) based on LDAP The information collected in the BDII follow a GLUE schema
Dynamic case The number of IEs can change very quickly, they are very simple
devices, often with poor hardware support The discovery is just use to know which are the online IEs A new approach has been developed based on Peer to Peer (P2P)