Support Advance Elastic Scheduling

[scsldb]

Description

Advance Elastic Scheduling. including:

• Locatily ：Load-based replica/leader
• Cold/Hot Data isolation (Also supports Heterogeneous/ S3)
• External scheduling of Auto-Scale, I/O, Location, Prediction
• Database Core can handle hotspot more automatic

Category

Feature、Reliability

Value

Reduce costs

[zz-jason]

@nolouch Do we have a plan to support this feature?

[nolouch]

I think some parts are already in doing, such as geo and auto-scaling. I think this overall can be P1, it's more about a director.