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Jan Zirnstein, 10/18/2012 09:46 AM


Data Files from NDOS

CHECK WITH THE RUN COORDINATOR BEFORE DOING ANY OF THIS!

This wiki entry describes how to collect data from NDOS and store it as a data file that can be used with our DDT framework.

First, you need to make sure that data is being collected. Check the MicroSlice rate of the DCMs on Ganglia , it should be 20 kHz.

Once that is verified you can log into one of the NDOS buffer nodes:

ssh novadaq@novadaq-ctrl-farm-01.fnal.gov

NDOS has 16 buffer nodes (01 - 16). Note that the novaddt user does not have permissions on the buffer nodes.

Now you just need to set up the environment and run the job:

setup_novaddt
ddt-filter -c ddt-writeFile.fcl

This will run on the data stream and dump the data into a file called ddt.root.

Files from live data should be stored in

/nova/ana/trigger/data/

with format

DDTData-<det>-<size>-<date>-<run>.root
where
  • <det> is one of NDOS, ND, or FD
  • <size> is number of milislices (1000,10000,etc)
  • <date> is of format yymmdd
  • <run> is 1, 2, 3, 4, etc.