Core Scalability TechniquesArtur Ejsmont

What is scalability?

● Ability to adjusting capacity - UP and DOWN● Doing it in cost-effective way

Types of scalability

Three underlying techniques

1. Adding Clones2. Functional Partitioning3. Data Partitioning

1. Adding Clones

How it works:● All nodes are interchangeable

Benefits:● You can scale by adding/removing nodes● Losing a node reduces capacity (no downtime)

Example 1

How it works:● Isolate and split functionality● Monolithic V.S SOA

Benefits:● Each partition becomes a “product”

2. Functional Partitioning

Example 2

How it works:● Nodes are responsible for subsets of data● Ideally they share nothing

Benefits:● Supports endless data growth

3. Data Partitioning

Example 3

Adding Clones:● Either STATELESS on requires SYNCHRONIZATION

Functional partitioning: ● Difficult to add later on● Limited number of partitions

Data Partitioning:● You always need the “Sharding Key”● Difficult to work across shards

Challenges

Questions?