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Use of the skimmer on Noric machines
The skimmer is only usable on linux, and most of its features will not work outside of SLAC network, because it needs the access to intput ROOT data files, and to the metadata database for the pipeline I data files (at least for the step which is preparing the list of input ROOT data files). This is why it is recommended to use the skimmer only on noric machines, where any new release is installed by its developers.
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- Perl 5, which should be found with "/usr/bin/env perl".
- One of the supported ROOT releases (see above), specified wirh $ROOTSYS.
The predefined data kinds
The kinds of trees which can be skimmed is currently hardcoded, and especially targetted to GLAST needs. For each of those tree, we expect a top main branch. Actually, we distinguish two sets of trees : the ones which only rely on predefined ROOT types and have a single level of branches under the main one (the tuple-like trees), and the others. The latter typically requires the loading of a dedicated data description library before the concrete skimming takes place. The last release v7r0 should understand the following types :
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