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Data Files from NDOS » History » Version 3

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Martin Frank, 10/15/2012 09:42 AM


Data Files from NDOS

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.