I'm new to the MySQL world and was confused by the two. Don't they both provide high availability and sharding? Also, how does WebScaleSQL compare?

I managed to install and configure MySQL Fabric that manages multiple MySQL Server nodes. It works very well since I tested it by connecting to the Master node directly and played with the data (insert, delete). The slave nodes become identical to the master. Now, the fabric server should manage everything. Hence, the application should connect to the Fabric and not to the master node. This way, when the Master fails, Fabric will nominate a new Slave. Q1: How can I avoid Fabric server itself from becoming a single point of failure? Q2: Anyone has experience implementing Fabric? Is what I am planning to do is the best practice? Regards,