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Creating a PAR package to read a given ROOT file
Starting with version 5.32/00 it is possible to easily create a PAR file to read the content of data stored into a ROOT file. This is done via TFile::MakeProject, exploiting the fact that ROOT files are self-describing and contain enough information to read what is stored. The method MakeProject of TFile has been augmented with the possibility to store the relevant information in form of a PAR file.
Changing the default ROOT version
The version of the ROOT distribution installed on the PROOF cluster is the ROOT version run by PROOF by default. It is possible to choose a different version for the 'proofserv' applications run on the master and worker machines. The only requirement is that the versions are compatible with the version run by the xrootd/xproofd daemon applications, which is typically the case for ROOT later than 5.22/00. This functionality also provides a convenient way to easy have debug and optimized version available to users.
