On Fri, 27 Apr 2007 19:32:13 +0000, Ted MacNEIL <[EMAIL PROTECTED]> wrote:
>>DEFRAG became useless. > >I have not defragged for performance for years. >But, extent problems will always be with us, until we can predict, effectively, how big our operational files will be as the business grows. > >Yesterday's large files are today's small ones. >Extent consolidation is the only valid reason for defrag. > Why do you need to consolidate extents when most data sets can have 123 per volume? Unless you really mean contiguous space. You can have thousands of files all using a single extent and very little contiguous space. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group: G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.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
