VMware Metro Storage Cluster Explained – Part 1: The Challenge

First and foremost, vMSC stands for vSphere Metro Storage Cluster, that is, a vSphere HA/DRS cluster stretched over distance. After attending Duncan Epping & Lee Dilworths presentation at VMworld 2013 on vSphere Metro Storage Clusters (Session BCO4872), it got me thinking about writing this article. The use case for vMSC is pretty clear….to provide VM mobility and resilience across Data Centers. As a storage practitioner for 12 years, one of Read More …

Modern solutions for meeting RPO/RTO ?

What is RPO/RTO ? The question of RPO/RTO has caused some confusion for IT folks through the years. Let’s start with the traditional definition of a recovery point from Wikipedia: It is the maximum tolerable period in which data might be lost from an IT service due to a major incident. The RPO gives systems designers a limit to work to. For instance, if the RPO is set to 4 hours, then in Read More …