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1 TadSmith commented Permalink

Could you elaborate on the change volumes? And how they may potentially allow us to mirror across a smaller pipe?

2 anthonyv commented Permalink

Hi, <br /> The change volumes are effectively snapshots that capture the state of the volume and lets the machine determine the delta of changes at each scheduled replication interval. <br /> That delta are then mirrored and the machine waits for the next interval to expire. <br /> This means that if the same blocks are being repeatedly changed, then they are only mirrored once per scheduled interval (instead of every time the block is changed). <br /> This means far less traffic is sent. <div>&nbsp;</div> There are some details in the Copy Service chapter of this new Redbook: <br /> http://www.redbooks.ibm.com/abstracts/sg247938.html?Open <div>&nbsp;</div> I will be writing in a post in the coming weeks...