File Merger: a very simple configurable application of LHCb in Noether

... perhaps I should have called it concatenate ...

(the result of task #32774 )

....... Concatenate

What is it?

  • FileMerger() is a very simple configurable which has only one use, to concatenate files together and output a merged file.
  • It is able to merge many MDF files, RAW files, or DSTs, and employs a combination of:
    • InputCopyStream
    • MergeFSRs
    • MDFWriter

How to use it?

  • Setup the project SetupProject Noether

  • Set up your input
    • any gaudi-card dataset will work, in Ganga, from the book-keeping, or from the TestFileDB... here is an example with a file stored in the TestFileDB
#imagine this is in a file called mydata.py
from GaudiConf import IOExtension
IOExtension().inputFiles(["root://eoslhcb.cern.ch//eos/lhcb/grid/prod/lhcb/swtest/lhcb/swtest/2011_smallfiles_EW/00010197_00000049_1.radiative.dst"])

  • Use the merger
#the default will create a file called merged.dst
from Configurables import FileMerger
FileMerger()

  • e.g.: =gaudirun.py mydata.py $FILEMERGEROPTS/Default.py =

Resources

Options and settings

  • FileMerger is about the simplest possible configurable application it's possible to write in LHCb software.
  • FileMerger has very few options, and all of them are very obvious...
class FileMerger(LHCbConfigurableUser):
    ## Possible used Configurables
    __used_configurables__ = [ LHCbApp ]

    __slots__ = {
          "EvtMax":            -1    # Maximum number of events to process
        , "SkipEvents":        0
        , "Simulation":        False # True implies use SimCond
        , "DataType":          '2012' # Data type, can be [ '2012','2011','2010'... ]
        , "DDDBtag" :          'default' # default as set in DDDBConf for DataType
        , "CondDBtag" :        'default' # default as set in DDDBConf for DataType
        , "OutputFile" :       'merged.dst' # output filename
        , "MergeFSR"   :       True #whether to merge FSRs on the output if MDF
        , 'WriteFSR'    :      True #copy FSRs as required if not MDF

        }

-- RobLambert - 21 Mar 2014

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Topic revision: r4 - 2014-03-24 - RobLambert
 
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