AWS EC2 Placement Groups: Partition vs Spread

Is there a good comparison table for the two types of AWS EC2 Placement Groups?

• Partition
• Spread

I have read the AWS Documentation but I am still a bit confused.

After reading the AWS Documentation a bit more and googling a little bit more, I think I have some idea. Let me try to provide the answer myself below. Comments are welcome.

• Parition Placement Group

  • Each partition within a PG has its own set of racks. Each rack has its own network and power source
  • Good for deploying large distributed and replicated workload. There are at most 7 parititions in each AZ, but the number of instances in each partition is limited only by the account limits.
  • Offer visibility into the partitions
  • Partitions can be in different AZs in the same region
  • A newer feature (compared to the Spread PG) introduced only in December 2018 (see Annoucement of the feature)

• Spread Placement Group

  • Each instance is placed in its own distinct rack. Each rack has at most one instance
  • Good for deploying applications that have a smaller number of instances. You can have at most 7 instances per AZ in the group
  • The group can span multiple AZs in the same region.