I'm not sure of understanding properly your question, in the same section 30.2 it says:
"The intermediate site disk subsystems are collectively paused by the Global Mirror Master disk subsystem to create the Consistency Group (CG) set of updates. This pause would normally take 3 ms every 3 to 5 seconds. After the CG set is formed, the Metro Mirror writes, from local site (Site A) volumes to intermediate site (Site B) volumes, are allowed to continue." So, i think this "hypothesis" is not true, the IBM solution pauses the primary disk subsystem and that is enough to have consistency. My experience in my actual shop is with Global Copy/Global Mirror, and I can tell you we get Consistency Groups without suspending the Global Copy. Hope it helps, regards, Gonzalo Cengotita On Fri, Aug 5, 2011 at 4:26 PM, Tom Ambros <[email protected]>wrote: > We're being told that we are not going to see consistency groups formed on > the GM side while we run MM until we suspend MM at which point we get one > consistency group formed and can flash to our recovery volumes at the > remote site. This is inconsistent with the DS8000 Copy Services > documentation section 30.2 if I read that correctly. Can anyone confirm > or deny the 'no consistency group while Metro Mirror running', how shall > we phrase this delicately, hypothesis? > > Thanks... > > Thomas Ambros > Operating Systems and Connectivity Engineering > 518-436-6433 > > > > Email Classification: KeyCorp Internal > </pre> > > This communication may contain privileged and/or confidential information. > It > is intended solely for the use of the addressee. If you are not the > intended > recipient, you are strictly prohibited from disclosing, copying, > distributing > or using any of this information. If you received this communication in > error, > please contact the sender immediately and destroy the material in its > entirety, > whether electronic or hard copy. This communication may contain nonpublic > personal > information about consumers subject to the restrictions of the > Gramm-Leach-Bliley Act. You may not directly or indirectly reuse or > redisclose > such information for any purpose other than to provide the services for > which > you are receiving the information. > > 127 Public Square, Cleveland, OH 44114 > > <pre> > > > If you prefer not to receive future e-mail offers for products or services > from Key > send an e-mail to mailto:[email protected] with 'No Promotional E-mails' > in the > SUBJECT line. > > ---------------------------------------------------------------------- > 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 > -- ------------------------------------------------------------------------------------------ Gonzalo Cengotita Quirce ------------------------------------------------------------------------------------------ ---------------------------------------------------------------------- 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
