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Designing of LBGM on IBM Storwize V7000 & Performance Monitoring

By Archive User posted Thu February 16, 2012 04:03 AM

  

Originally posted by: Suman Debnath


LBGM(Low Bandwidth Global Mirror) is the latest technology which comes with IBM SVC v6.3, where asynchronous replication from DC to DR with SVC/V7000 can be setup with less bandwidth, prior to v6.3 the regular Global Mirror was very much sensitive to available bandwidth, where we can't tweak the RPO(directly/indirectly). With Global Mirror with Change Volume(LBGW), SVC/V7000 uses an internal Flash Copy for the Global Mirror replication. This paper, would help you to understand the internals of LBGW/Global Mirror with Change Volume, design and implementation of LBGM on IBM Storwize V7000.   (  https://www.ibm.com/developerworks/mydeveloperworks/blogs/869bac74-5fc2-4b94-81a2-6153890e029a/resource/ImplementationofLBGMandPerformanceMonitoring_v1.pdf  )
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Archive User
Tue November 17, 2015 10:01 AM

Originally posted by: Bridgestone


This gives a very good overview of the copy service with change volumes. Some times, it's hard to get all settings right, in right order, from Knowledge Center. This was very helpful, thank you! :) /Joakim

Archive User
Wed May 02, 2012 11:53 AM

Originally posted by: Suman Debnath


They took "single" option out of code before they GA'd 6.3 but when I put that in this doc, it was based in the code. I think single may be put back in in the future but for now "none" and "multi" are your only choices. I'm working on the next version of this paper with this modification also trying to add one section on Bandwidth Calculation/RPO/Cycle Mode relationship and inter-dependency. Thanks for appreciating the paper, please do share all your inputs to make the doc more comprehensive and useful. Regards, Suman

Archive User
Wed May 02, 2012 06:36 AM

Originally posted by: MApa82


Hi, In the paper, the "cyclingmode" parameter accepts the 'single' value; but in the v7000 6.3.0.2 this value is unaccepted (only "none|multiple" are accepted values). Is this a mistake or an improvement in the next firmware release? Anyway, thanks for the paper! It's a great work! Thanks, Ma.