cet-is » art

Dear Artists,

The nova ddt group has recently upgraded to art version 1_08_09, since then I've discovered that the previous way in which I was retrieving a one to many association has stopped working. I've managed to find that it only seems to work if retrieve a one to one association (which includes the "many" product of the aforementioned one to many association) before hand.

Do you know why this would be?

In order to illustrate our use case and to demonstrate the problem I've prepared a small test package. This package runs in the novaddt environment and consists of the following:

1. a producer module which makes several vectors of DAQ hits
2. a producer module which makes two tracks for each vector of DAQ hits then stores the associations between each track and and a sub-set of the hits with no instance label (this would represent the hits that make up the track) and then also the entire vector of DAQ hits and each track with an instance label (this represents a link to the entire hit list within which the track was found).
3. a filter module which retrieves these products and associations

You can run this by running the following commands:

# setup novaddt
source /grid/fermiapp/nova/novaddt/srt/srt.sh
export EXTERNALS=/nusoft/app/externals
source $SRT_DIST/products/setup
source $SRT_DIST/setup/setup_novaddt.sh "$@" 
# make a test release
newrel -t development nova_ddt_sandbox_061113
cd nova_ddt_sandbox_061113/
srt_setup -a
# add in the test package
svn co svn+ssh://p-novaart@cdcvs.fnal.gov/cvs/projects/novaart-devs/trunk/users/tamsett/AssnTest ./AssnTest
cd include/
ln -s ../AssnTest/
cd ../
# make
make
# run
nova -c job/dummytrackmakeranajob.fcl /nova/ana/trigger/data/ddt.root -n 1

You'll notice that the printout from the final module (3.) shows that the track to hits association finds no tracks:

--- novaddt::DummyTrack Ana analyze. Event: 1
    --- got 10 tracks
    --- got 5 slices
    got 5 associations between slices and tracks
        slice[0]: 1 hits
            got 0 tracks
        slice[1]: 2 hits
            got 0 tracks
        slice[2]: 3 hits
            got 0 tracks
        slice[3]: 4 hits
            got 0 tracks
        slice[4]: 5 hits
            got 0 tracks

However if you now edit AssnTest/DummyTrackAna_module.cc and comment in line 86: https://cdcvs.fnal.gov/redmine/projects/novaart/repository/devs/entry/trunk/users/tamsett/AssnTest/DummyTrackAna_module.cc#L86

and then remake and run that the associations now work:

--- novaddt::DummyTrack Ana analyze. Event: 1
    --- got 10 tracks
    --- got 5 slices
    got 5 associations between slices and tracks
        slice[0]: 1 hits
            got 2 tracks
        track[0] V: 0
        track[1] V: 0
        slice[1]: 2 hits
            got 2 tracks
        track[0] V: 1
        track[1] V: 1
        slice[2]: 3 hits
            got 2 tracks
        track[0] V: 2
        track[1] V: 2
        slice[3]: 4 hits
            got 2 tracks
        track[0] V: 3
        track[1] V: 3
        slice[4]: 5 hits
            got 2 tracks
        track[0] V: 4
        track[1] V: 4

In case any of the above steps don't work the code can be seen here:

https://cdcvs.fnal.gov/redmine/projects/novaart/repository/devs?path[]=trunk&path[]=users&path[]=tamsett&path[]=AssnTest

and found in: /afs/fnal.gov/files/home/room2/tamsett/public/AssnTest

Sorry for the long email, regards

Matthew