Paul Gilmartin wrote: <begin extract> I've found that for large numbers of small files z/OS UNIX files vastly outperform legacy data sets. The allocate/open/close/free overhead is brutal. </end extract>
My measurements confirm this, but when these small files are moved [as members] into a single PDSE things change dramatically. The UNIX times are 1.47-3.07 times higher: To avoid spurious exactitude let us just say significantly higher. Here, as often, some putative UNIX advantage turns out to reflect an inadequacy. UNIX is certainly very different from and very much smaller and less mature than MVS. That it is better is in the eyes of the beholder, particularly the beholder whose grasp of the facilities that MVS makes available is less than comprehensive. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
