1. A method of determining files associated with one or more workflows, comprising: receiving a trace of accesses of files in at least one server; grouping the files into at least one set of files, wherein the files in the set are accessed together more than a predetermined number of times in the trace; and identifying files associated with a particular workflow based on the at least one set; and dividing the trace into a plurality of trace fragments, wherein grouping the files into the at least one set of files comprises grouping the files into the at least one set of files that appear together in more than the predetermined number of trace fragments.