SQL DB scability

系统设计
1

Try to clarify the SQL scalability, Like Oracle, it also support cluster DB , and could add new DB instance in Cluster.

Assume when No SQL scale to more instance, need to add hardware , and make configuration change.

Hope to clarify what is the reason or difference for SQL and NO SQL scability process to make NO SQL have better scability process?

2

NoSQL 往往 out-of-box 提供分布式解决方案，把分布式的性能，易用的配置作为核心卖点，而像 MySQL 需要引入额外的 Proxy 来实现分布式。当然这是从传统上而言，也不都是绝对的。
现在传统的 SQL 数据库也会分布式解决方案，NoSQL 和 SQL 设计理念也会取长补短。