How do you know where an object is located with Virtual SAN?

You must have been wondering the same thing after reading the introduction to Virtual SAN. Last week at VMworld I received many questions on this topic, so I figured it was time for a quick blog post on this matter. How do you know where a storage object resides with Virtual SAN when you are striping across multiple … [Read more...]

vSphere 5.5 nuggets: High Availability Enhancement

There aren’t a lot of changes in 5.5 when it comes to vSphere High Availability aka HA, but one is worth noting. As most of you are probably aware of, vSphere HA in the past did nothing with VM to VM Affinity or Anti Affinity rules. Typically for people using “affinity” rules this was not an issue, … [Read more...]

vSphere 5.5 nuggets: Change Disk.SchedNumReqOutstanding per device!

Always wanted to change Disk.SchedNumReqOutstanding per device instead of per host? Well now with vSphere 5.5 you can! I didn’t know about this either, but my colleague Paudie pointed this out. Useful feature when you have several storage arrays and you need to tweak these values, now lets be clear… I do … [Read more...]

Testing vSphere Virtual SAN in your virtual lab with vSphere 5.5

For those who want to start testing the beta of vSphere Virtual SAN in their lab with vSphere 5.5 I figured it would make sense to describe how I created my nested lab. (Do note that performance will be far from optimal) I am not going to describe how to install ESXi nested as there are a billion articles out there … [Read more...]

What’s new in vSphere 5.5 for DRS?

In vSphere 5.5 a couple of new pieces of functionality have been added to DRS. The first one is around the maximum number of VMs on a single host that DRS should allow. I guess some of you will say hey didn’t we introduce that last year with that advanced setting called “LimitVMsPerESXHost“? Yes that … [Read more...]

vSphere 5.5 nuggets: changes to disk.terminateVMOnPDLDefault

Those who were in the vSphere 5.5 beta program might have noticed it but I am suspecting many did not. With vSphere 5.5 there is finally an advanced setting to enable Disk.terminateVMOnPDLDefault. This advanced setting was introduced with vSphere 5.0 and unfortunately needed to be enabled in a file … [Read more...]

Different tiers of storage in a single Storage DRS datastore cluster?

This question around adding different tiers of storage in a single Storage DRS datastore cluster keeps popping up every once in a while. I can understand where it is coming from as one would think that VM Storage Profiles combined with Storage DRS would allow you to have all types of tiers in one cluster, but then … [Read more...]