Jul2010

vSphere 4.1 Improvements in Availability

With the release of vSphere 4.1 there have been some great enhancements that have been added with this release. In one of my earlier post I took a look at the vSphere 4.1 release of ESXi. This post I am going to take a look at vSphere 4.1 availability options and enhancements. So what has changed with this release? A maximum of 320 virtual machines per cluster has been firmly set. In vSphere 4.0 there were different VM/Host limitations for DRS as well as different rules for VMware HA. VMware has also raised the number of virtual machines that can be run in a single cluster from 1280 in 4.0 to 3000 in the vSphere 4.1 release. How do these improvements affect your upgrade planning?

Nov2009

EMC Hints at Storage Technology Breakthrough in VMworld Demo

This technique operates completely transparent to the vSphere environment, as only a single LUN is presented to the two hosts. So a single vMotion and a “logical” storage vMotion (actually hyper-speed synchronous dual write) are combined into a single vMotion which only takes a few minutes or seconds to execute.