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Hi Pablo, that's very interesting, and I agree completely with your conclusion, i.e. in most cases the lan data access is more efficient and scales better with respect to local disk access. Many times this is not very well understood by people, always striving to keep local files at any cost. It would be very interesting to have a comparison between the performance in proof between a dcache storage and an analogous xrootd storage, which is the default solution for that. With the same pool of workers of course. From what I've understood, dcache uses a read ahead mechanism (at the client side), while xrootd uses a scheme which is mixed with informed async prefetching. Fabrizio Pablo Fernandez ha scritto: > Hi all, > > I would like to share with you some information about my testings of > performance in Proof with different storage schemas. > > http://root.cern.ch/phpBB2/viewtopic.php?t=6236 > > I have translated this topic to the Proof Forum since seems to me more > Proof-related than just xrootd, I hope you don't mind. > > BR/Pablo