IOPS Explained

I found this great article explaining IOPS and correlation to latency read/write % and IO data size.
IOPS Explained Article

How to use esxtop

I found this great article full of benefitial references for using esxtop. Here it is: http://www.yellow-bricks.com/esxtop/

How to download a diagnostic log bundle from an ESX/ESXi host using PowerCLI

Login to desired host using PowerCLI:
Connect-VIServer -Server HostnameOrIPAddress

Download a diagnostic log bundle from host:
Get-VMHost HostNameOrIP | Get-Log -Bundle -DestinationPath c:\Storage\Location\