Joel, If you are using At-Time split with Shadowimage then you don't have to do anything from the Host side except tell the Storage Controller(s) what time the Point in Time should be. It is instant and consistent.
If you're splitting Shadowimage Volumes using the archaic PPRC commands then the time to issue the commands can be lengthy, but that has more to do with ANTRQST then the storage. BCM has substantially greater parallelism. Ron > > I would, however, concur that the copy is not "instantaneous". > Establishing the FlashCopy relationship for 300 - 400 drives takes us > somewhere on the order of a minute, so you must, for example, suspend > DB2 updates and some other update activities during the establishment > process to be sure that you have consistent volume backups that will > actually be usable for a Disaster Recovery. The establishment time is > short enough that this appears to affected users as a short-term period > of bad response rather than a system outage, and users that only need > read access to data shouldn't even see an interruption. If you > incorrectly assume that multi-volume FlashCopy is instantaneous and take > no precautionary actions to insure data consistency, you are likely to > end up with inconsistencies in your DB2 tables, catalogs out of sync > with datasets on other volumes, etc., etc. > ---------------------------------------------------------------------- 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
