Hi Rene, Thank you for your advice regarding optimizing the use of AutoSave. We are intending to use AutoSave in an online context, in which we want to read data soon after it is written by the DAQ, and before the data file has closed. In this respect, minimizing the processing time while providing fast access to the data is important to us, and it would be very useful to have an automized method of optimizing the basket size and frequency of autosave calls if this is something you can possibly implement in future versions of root. The data structures and event sizes may also change over the course of the experiment so having an automatic method of retuning parameters would be helpful. Best regards, Sue Kasahara Rene Brun wrote: ... > So, it is up to you to tune the basket sizes to minimize the overhead > induced by too many AutoSaves in time and the read performance. > I would appreciate getting more feedback on this important subject. > > One could for example imagine to implement the following scenario. > Root could automatically select a better basket size when enough data > has > been collected to compute the mean/rms of each entry per branch. > One could also imagine a function TTree::Hints suggesting the best > numbers. > > Rene Brun
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