Tom, While you don't see the activity on the channels with FCV2, you can certainly see it on the disks.
It can be especially interesting if you start hitting those volumes with updates right after the DEFRAG is finished. While z/OS thinks it's writing to empty space, the destage has to wait for the FCV2 sessions to run through a COW process. Yes, it did work much better on the Iceberg. Ron > > Doesn't really have anything to do with ECKD, it has more to do with how > DADSM allocates datasets on a volume. He still looks at the freespace in > the VTOC, so if the freespace ain't contiguous, some allocations may still > fail. Most DEFRAGs will use FlashCopy or SnapShot under the covers, so > you > shouldn't see the huge times in ENQ and data movement that you used to see > with DEFRAG (or COMPAKTOR if using FDR). > > Regards, > Tom Conley > ---------------------------------------------------------------------- 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
