Part - 6 - AWS - Placement Group

What is Placement Group?

A placement group is a logical grouping of instances within a single Availability Zone. Using Placement groups enables applications to participate in a low-latency, 10 Gbps network. Placement Groups are recommended for applications that benefit from low network latency, high network throughput, or both.

·        A placement group can't span multiple Availability Zones.

·        The name you specify for a placement group must be unique within your AWS account.

·        Only certain types of instances can be launched in a placement group ( Computer Optimized, GPU, Memory Optimized, Storage Optimized)

·        AWS recommend homogenous instances within placement groups.

·        You can't merge placement groups.

·        You can't move an existing instance into a placement group. You can create an AMI from your existing instance, and then launch a new instance from the AMI into a placement group.

·        Example it is used, where high computing is required, hike hadoop cluster.