On Sun, 3 Jul 2005 15:22:26 +0800, Ron and Jenny Hawkins <[EMAIL PROTECTED]> wrote:
>Ravi, > >You have two disconnected environments sharing the same volume, and possibly >the same datasets. Reserve is used to maintain the integrity of volume and >datasets when the volume is shared across systems. You are suggesting >converting reserves, with no method to propagate the enqueue to the other >system - there goes your integrity. > >Because the backup reserves the volume, it will be inaccessible to other >systems until the backup completes. Perhaps a way around this is to use >Concurrent Copy for your Volume Dumps. That way the enqueue only exists >while DFDSS establishes the Datamover session, and you actually get a backup >with better consistency. > > SETSYS VOLUMEDUMP(CC) > >Ron Ravi, There can be all kinds of issues with sharing volumes without an integrity manager like GRS or MIM (MII). Search the archives for lots of information on this. As for Ron's recommendation, you can also implement a DFDSS exit to the ENQ/RESERVE is only for the duration of reading the VTOC instead of the duration of the entire dump. It is discussed in the DFDSS manuals and I've also posted it to IBM-MAIN a long time ago. Search the archives for ADRUNEQ. Cheers, Mark -- Mark Zelden Sr. Software and Systems Architect mailto: [EMAIL PROTECTED] Systems Programming expert at http://Search390.com/ateExperts/ 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
