General Rules and Limitations
The following guidelines should be considered when using Placement Groups
Each AWS service has its own set of limits, such as the number of Amazon EC2 instances that can be launched or the number of Amazon S3 buckets that can be created. These limits are designed to ensure that AWS resources are used in a manner that is fair to all customers and that the overall performance and stability of the AWS infrastructure are not impacted.
- One Placement Group at a Time: An instance cannot be launched in more than one placement group.
- AWS is designed to help customers meet their compliance requirements, but it is the customer’s responsibility to ensure that they are in compliance with all applicable laws and regulations.
- For EC2 instances in a particular Availability Zone, capacity reservations are made via on-demand capacity reservations and zonal reserved instances.
- The Instances in a Placement Group are permitted to use the capacity reservation. It is advised that you reserve space within a cluster placement group when utilizing one that allows for capacity reservations. See Capacity Reservations in Cluster Placement Groups for further details.
- For instances located in a certain Availability Zone, Zonal Reserved Instances offer a capacity reserve. The instances in a placement group are permitted to use the capacity reservation.
- AWS is committed to the Security of Customer Data and provides a number of security features to help customers secure their resources. However, customers are ultimately responsible for securing their own data and must follow best practices to ensure the security of their resources.
Placement Group Rules and Limitations
Pre-requisite: EC2
Placement groups are a mechanism used in Amazon Elastic Compute Cloud (EC2) for controlling the placement of instances in a cluster. They have some rules and limitations that you need to be aware of when using them.
Here are some of the rules and limitations of Placement Groups:
- General Rules and Limitations
- Cluster Placement Group Rules and Limitations
- Partition Placement Group Rules and Limitations
- Spread Placement Group Rules and Limitations