EC2 Placement Groups

Question 1

What is a Cluster?

Answer 1

Packs instances close together in Availibility Zone.
- Allows workloads to have load latency network performance.
- Typically for HPC applications.

Question 2

What is a Partition?

Answer 2

Spreads instances across logical partitions so that groups of instances in one partition do not share underlying hardware w/ groups of instances in another.
- Typically used by large distributed & replicated workloads.
- Ex: Hadoop, Cassandra, & Kafka.

Question 3

What is a Spread Placement Group?

Answer 3

Each instance is placed on distinct underlying hardware.
* Instances will not share same physical server, rack, or power source.