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> 2. A very serious problem (in addition to the raw number of jobs) is > that Daniele's chain do not make use of a 'new' input format > implemented weeks ago in both anaQA and anaRecoil: While chaining > you can either specify just a filename or a filename and the number > of events. If you do the former, ROOT will open the file, extract > the number of events, close it. Go to the next file. Do that for > all files in the chain. Multiply by 100, if all of your jobs start > up at the same time in the long queue. (Or at least 125.) You > will completely saturate and kill any server. On the other hand, > if you do specify the number of events, ROOT opens the rootfiles > only for processing, and then we have some CPU cycles to spend and > the access is quickly becoming asynchronous. It might be beneficial > to switch to the new chaining scheme. At least consider it. how can I produce a list of files with the number of events? Do you have a macro available? I see that you produced the new chains for data in ~ursl/macros/fsx/vub/chains/csx-*. Do you have the same for generic MC? Thanks a lot, Daniele