Tag Archives: Fault Tolerance

EMC VNXe Spurs Thinking Outside the Box

Chad Sakac mentions on his blog that VNXe “uses a completely homegrown EMC innovation (C4LX and CSX) to virtualize, encapsulate whole kernels and other multiple high performance storage services into a tight, integrated package.” Well this has gotten me to thinking about other uses of VNXe. If EMC could manage to “refactor” or encapsulate a few more technologies, I think we have the makings of a killer virtualization security appliance. Why would a storage appliance spur on thinking about virtualization security? Continue reading EMC VNXe Spurs Thinking Outside the Box

A Look at Stratus Technology

There used to be a FedEx commercial that had a saying “when it just has to be there overnight”. What if we did a play on words and changed the saying to work with Fault-Tolerance and or High Availability.  The saying would be something like “when it just has to remain running overnight”.

Every business environment today demands both performance and ultra-high availability.  When working with virtual environments some high availability options are included already with the ability to restart any virtual machines that were running on a host that failed and crashed.  This still has limitations in that the virtual machine would still need to be restarted and this in itself still has some downtime.  The amount of downtime can vary depending on variables with things like the number of virtual machines to be restarted and the number of hosts available to handle the virtual machines restarting.  Downtime could be as quick as five minutes or as long as thirty minutes depending on the variables. Continue reading A Look at Stratus Technology

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 host 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? Continue reading vSphere 4.1 Improvements in Availability