Global Mirror with change volume analysis using the BVQ GUI (the follow-on step to solve problems)
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In the blog entry before I showed how we can easily monitor Global mirror with change volume (GMCV)
This is the main benefit of BVQ - giving you a great overview with web-monitoring to recognize problems and allowing you to go deep to solve problems in a follow-on step.
The following picture shows the write data rate between two clusters running a GMCV relationship.