Dynamic horizontal scaling for Small to Medium-sized installations.

This project solves horizontall scale problem to increase read-only QPS in real-time by adding more nodes.

As of 23.02 MCS can't add read-only nodes sharing the same data between the nodes neither for S3, nor for distributed File Systems or block device technologies.

The topology would consist of 3 major elements:

• MaxScale proxy to Load Balance read-only requests between read-only nodes and route DML/DDL to the read-write node
• Read-write node that "owns" dbroot/-s with data
• Multiple read-only nodes that doesn't run WE or "own" dbroot/-s.

The problems to solve:

• add declarative description for a set of read-only nodes into Columnstore.xml
• teach CMAPI how to add a node with read-only role into a cluster
• handle read-only ownership in StorageManager for S3 installations