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Auto Scaling ¶
Auto Scaling Group¶
When you create an Auto Scaling group, you can set the minimum number of Amazon EC2 instances. The minimum capacity is the number of Amazon EC2 instances that launch immediately after you have created the Auto Scaling group. In this example, the Auto Scaling group has a minimum capacity of one Amazon EC2 instance.
Placement Group¶
- A placement group is concerned primarily with network throughput and reducing latency among EC2 instances within a single availability zone. AWS does support a placement group spanning multiple AZs via spread placement groups, but unless “spread” is specifically mentioned, you should assume the question references a “normal” (or “cluster”) placement group.
- Cluster placement group is the default type of placement group.
- Spread placement groups can span availability zones and support up to 7 instances per zone.