How to achieve Data synchronization in Active/Active clustering using SQL Server 2012 Standard Edition I have a requirement of Active/Active clustering to be implemented using SQL Server 2012 Standard Edition in shared storage SAN. How the data share or synchronization between the two instances on the the disks of nodes in shared storage is going to achieve on the same.

My concern here is how the data synchronization happens between the two nodes in SQL Server 2012 Standard Edition and how to configure the same?
There is no such thing in SQL 2012. 

There are Availability Groups which don't use shared storage. It it's Enterprise edition only (or SQL 2016).