On Wed, 15 Apr 2009 10:50:37 +0200, R.S. <r.skoru...@bremultibank.com.pl> wrote:
>By the way: is there any procedure to defrag HFS/ZFS ? >I mean some process similar to PDS compress or KSDS reorg. >Is there any need to do it? >How to measure it? > >Further explanation: I'm not talking about defragmentation o f volume >containing HFS dataset, rather about defragmentation of the dataset content. > >-- For HFS, it shouldn't be needed - similar to PDSE (assuming the files within the HFS aren't in use). Pages from deleted files or index pages are can be reused after the last connection to the file has been terminated. See similr past discussions on PDSE (especially in the LNKLST) in the archives. For zFS, space is reused also. I suggest you read the zFS admin guide and in particular the section on zFS disk space allocation that describes how system and user areas are allocated in the aggregate. Do you have a reason or evidence that makes you think you need to defrag / reorg an HFS or zFS? Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:mark.zel...@zurichna.com z/OS 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
