AWS EC2 Types

 T3 instace:T3 instances are the next generation burstable general-purpose instance type that provide a baseline level of CPU performance with the ability to burst CPU usage at any time for as long as required. T3 instances offer a balance of compute, memory, and network resources and are designed for applications with moderate CPU usage that experience temporary spikes in use.

T3 instances accumulate CPU credits when a workload is operating below baseline threshold. Each earned CPU credit provides the T3 instance the opportunity to burst with the performance of a full CPU core for one minute when needed. T3 instances can burst at any time for as long as required in Unlimited mode.

Features:

• Burstable CPU, governed by CPU Credits, and consistent baseline performance
• Unlimited mode by default to ensure performance during peak periods and Standard mode option for a predictable monthly cost
• Powered by the AWS Nitro System, a combination of dedicated hardware and lightweight hypervisor
• AWS Nitro System and high frequency Intel Xeon Scalable processors result in up to a 30% price performance improvement over T2 instances

Use Cases:

Micro-services, low-latency interactive applications, small and medium databases, virtual desktops, development environments, code repositories, and business-critical applications

T3a:T3a instances are the next generation burstable general-purpose instance type that provide a baseline level of CPU performance with the ability to burst CPU usage at any time for as long as required. T3a instances offer a balance of compute, memory, and network resources and are designed for applications with moderate CPU usage that experience temporary spikes in use. T3a instances deliver up to 10% cost savings over comparable instance types.

T3a instances accumulate CPU credits when a workload is operating below baseline threshold. Each earned CPU credit provides the T3a instance the opportunity to burst with the performance of a full CPU core for one minute when needed. T3a instances can burst at any time for as long as required in Unlimited mode.

Features:

• AMD EPYC 7000 series processors with an all core turbo clock speed of 2.5 GHz
• Burstable CPU, governed by CPU Credits, and consistent baseline performance
• Unlimited mode by default to ensure performance during peak periods and Standard mode option for a predictable monthly cost
• Powered by the AWS Nitro System, a combination of dedicated hardware and lightweight hypervisor