Jan, I suggest you look in the Redbook at this address: http://www.redbooks.ibm.com/abstracts/sg246787.html Book number is: SG24-6787 Title: DS8000 Copy Services for IBM Systems z It is dated February 2009 and so is up to date.
Terry Draper zSeries Performance Consultant [email protected] mobile: +966 556730876 --- On Sat, 29/8/09, Jan Vanbrabant <[email protected]> wrote: From: Jan Vanbrabant <[email protected]> Subject: What happens in a DS8000 Metro Mirror (PPRC-Sync) config when the relationship between a volume pair is broken? To: [email protected] Date: Saturday, 29 August, 2009, 1:33 PM Hi, 1° What happens in a DS8000 Metro Mirror (PPRC-Sync) config when the relationship between a volume pair is broken, say, because of network problems? This network outage could for example last for hours. How does the system keep track of the source updates & changes in the mean time, in order to resynchronize the volume pair later on? With the IBM FlashCopy SE feature, there is something like the copy repository where only the capacity needed to save pre-change images of the source data is allocated. Is there also kind of such a “copy repository” with Metro Mirror? If yes, has it to be sized? Or is the storage server capable of handling & managing this by itself? Where can I find more info on this? Have any benchmarks or tests been done in this perspective? I would appreciate it utmost if you would route me to appropriate reading material? 2° I assume (dare hope) that the resynchronization process can be (or is) prioritized the right way in order to not perturbate the real & usually ongoing I/O response time? Cheers,Jan ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
