colleagues, in our adaptation of galaxy for large-scale natural language processing, a fairly common use pattern is to invoke a workflow on a potentially large number of text files. hence, i am wondering about facilities for uploading an archive (in ‘.zip’ or ‘.tgz’ format, say) containing several files, where i would like the upload tool to extract the files from the archive, import each individually into my history, and (maybe optionally) create a list collection for the set of files. in my current galaxy instance (running version 2015.03), when i upload a multi-file ‘.zip’ file, part of the above actually happens: however, the upload tool only imports the first file extracted from the archive (and helpfully shows a warning message on the corresponding history entry). have there been relevant changes in this neighborhood in more recent galaxy releases? related to the above, we have started to experiment with potentially large collections and are beginning to worry about the scalability of the collection mechanism. in principle, we would like to operate on collections comprised of tens or hundreds of thousands of individual datasets. what are common collection sizes (in the number of components, not so much in the aggregate file size) used in other galaxy instances to date? what kind of gut reaction do galaxy developers have to the idea of a collection containing, say, a hundred thousand entries? with thanks in advance,