Scaling and high availability

Scalability refers to the elasticity of compute resources, meaning adding more compute capacity as data volume increases to support a heavier workload. It is sometimes necessary to scale down resources that aren't in use to save compute costs. Scaling can be of two types: vertical or horizontal. Vertical scaling refers to replacing existing node types with bigger instance types. This is not sustainable after a point because there is an upper bound on the largest possible instance. Horizontal scaling refers to the addition of more worker nodes of the same type and is truly infinitely scalable. Each serves different scenarios. If the largest partition is no longer divisible, we benefit from a bigger node type. However, the advantage is that some of the nodes can be turned off when there is low data volume. This is an infrastructure and architecture capability and not directly related to Delta.

High availability (HA) refers to the system uptime...