Only thing I can think of is that the cost of reloading all of the files occur on the first tape. Where if each file was a different virtual tape, then each virtual tape is a separate reload (longer wait).
As an example: If you have 20 files on a virtual tape, then there will be one physical tape mount to move the virtual volume back into cache. When that completes all of the 20 files would be in the cache and read from there with no physical mount. If the 20 files were each a virtual volume then there could be up to 20 physical mounts, more that likely 20, to reload each virtual volume back into cache. If there never will be a reload into cache, then stacking gain nothing, except to guarantee that if you lose one file you lost then all, since they are all on the same virtual volume and physical volume too. Kenneth Leidner Imagination is more important than knowledge. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Bill Brown Sent: Tuesday, August 02, 2005 11:11 AM To: IBM-MAIN@BAMA.UA.EDU Subject: VTS and stacking Are there any benefits to stacking files on a tape when using vts? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
