Basics

Lets start with some basics

vSphere 5.5 U1 Product Documentation – https://www.vmware.com/support/pubs/vsphere-esxi-vcenter-server-pubs.html

vSphere 5.5 U1 Configuration Maximums – http://www.vmware.com/pdf/vsphere5/r55/vsphere-55-configuration-maximums.pdf

Virtual SAN – What’s New  – http://www.vmware.com/files/pdf/products/vsan/VMware_Virtual_SAN_Whats_New.pdf

Virtual SAN Design Guide – https://www.vmware.com/files/pdf/products/vsan/VSAN_Design_and_Sizing_Guide.pdf

 

Also check out the Videos page for some other great references