March 2008
Intermediate to advanced
326 pages
10h 22m
English
book
SAN Volume Controller: Best Practices and Performance Guidelines
by Jon Tate, Deon George, Thorsten Hoss, Ronda Hruby, Ian MacQuarrie, Barry Mellish, Peter Mescher
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Chapter 9.4.7. Saving bandwidth creating Metro Mirror and Global Mirror relationships
Page 165
Chapter 9. Copy services 165 disabled. Starting the flash copy mapping will re- enable the cache, improving the VDisks’ performance for Global Mirror I/ O. 9.4.6 Using Metro Mirror or Global Mirror with FlashCopy SVC allows you to use a VDisk in a Metro Mirror or Global Mirror relationship as a source VDisk for a FlashCopy mapping. You cannot use a VDisk as a FlashCopy mapping target that is already in a Metro Mirror or Global Mirror relationship. When you prepare a FlashCopy mapping, the SVC puts the source VDisks into a temporary cache- disabled state. This temporary state adds additional latency to the Metro Mirror relationship, because I/ Os that ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.