SRDF/Metro and vMSC BPs WP

I finally managed to cobble together enough time to complete a whitepaper on best practices when running Dell EMC SRDF/Metro with VMware vSphere Metro Storage Cluster (vMSC) that has been on my list for some time. I have an older paper on this topic but its focus was more on the application side – in particular Oracle Apps and Oracle Extended RAC. The vSphere version in that paper was 6.0 U1, so it’s a bit outdated for general best practices, however it is still a good resource on the Oracle side if you are doing RAC. The new paper is just the best practices for running SRDF/Metro with vMSC.

You can download it directly from the Dell EMC website here without logging in.

For those who may not be familiar with vMSC – it is a stretched cluster. At a high level, you have two datacenters within synchronous distance (e.g. campus) and each has an array and some ESXi hosts. You then configure a storage replication solution like SRDF/Metro between the arrays and present the storage to the ESXi hosts in a single vCenter. VMware sees a single device/datastore so now you can freely vMotion VMs across the ESXi hosts but also across the datacenters. In this configuration VMware vSphere DRS and HA play important roles, and this paper covers those best practices.

I used most of the latest software/hardware versions in the environment, but on both the Dell EMC and vSphere side you’ll be able to rely on it even if you are a version lower.

  • PowerMaxOS 5978.221.221 release
  • Unisphere for PowerMax 9.0
  • Solutions Enabler 9.0
  • VMware vSphere vCenter 6.7 U1
  • VMware vSphere ESXi 6.7 U1
  • PowerPath/VE 6.3

One area I covered more extensively in this paper is the pathing setup for uniform and nonuniform configurations. That was lacking in the last paper since it was focused on a singular environment. I’ll keep this paper updated going forward with the newest versions/features from both VMware and Dell EMC.


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