Want a free digital copy of the vSphere Design Pocketbook?

I just noticed that PernixData is offering free copies of the vSphere Design Pocketbook. Only thing you will need to do is register here. I believe at VMworld they handed out roughly 1500 copies of these, and they have been very well received. For those who don’t know, this book was “authored by the … [Read more...]

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...]

Minimum bandwidth requirements per concurrent vMotion?

I have been digging for a long time now to figure out what the minimum bandwidth requirements are per concurrent vMotion. After a long time I finally managed to get a statement. In the past the statement was made that 622Mbps was the minimum required bandwidth for vMotion, it appears that this is incorrect for vSphere … [Read more...]

ESXi “Management traffic” tickbox, what does it do?

I have seen this popping up various times over the last few years. That little tickbox on your VMkernel NIC that says “Management traffic” (aka management network) what is it for? What if I untick it, will SSH to that VMkernel still work? Will the HA heartbeat still work? Can I still ping the VMkernel NIC? … [Read more...]

My VMworld US 2013 schedule…

It seems that the dust has finally settled, it is clear what my VMworld schedule will look like. Well for now at least, as I will expect some “one on one” slots to be added, as part of the Expert track. If one of the sessions fills up there might also be a repeat, who knows… I will use this blogpost … [Read more...]