Hi All,
With the advent of SL7 it is necessary to switch DIRAC to use the gfal tools for file management, e.g. input and output data. At the moment this is handled by the lcgtools within DIRAC, however these are not available on SL7.
Unfortunately it's an all or nothing approach, so we need to switch all sites in Dirac in one go.
If you are using Ganga *from CVMFS*, we will talk to the Ganga developers and you should not have to do anything.
Note that if you are using lcgtools explicitly within your jobs and they run at SL6 sites, these are still available, but your file transfers within dirac will be handled by gfal.