• To obtain additional, dedicated capacity for Amazon EBS I/O, you can launch some instance types as EBS–optimized instances. Some instance types are EBS–optimized by default. For more information, see Amazon EBS–Optimized Instances (p. 770) . The following table summarizes the networking and storage features supported by the current generation instance types. VPC only EBS only SSD volumes Placement group HVM only Enhanced networking IPv6 support (VPC only) C3 Yes Yes Intel 82599 VF Yes C4 Yes Yes Yes Yes Intel 82599 VF Yes D2 Yes Yes Intel 82599 VF Yes G2 Yes Yes Yes 161
Amazon Elastic Compute Cloud User Guide for Linux Instances Instance Limits VPC only EBS only SSD volumes Placement group HVM only Enhanced networking IPv6 support (VPC only) I2 Yes Yes Yes Intel 82599 VF Yes M3 Yes M4 Yes Yes Yes Yes m4.16xlarge : ENA All other sizes: Intel 82599 VF Yes P2 Yes Yes Yes Yes ENA Yes R3 Yes Yes Yes Intel 82599 VF Yes R4 Yes Yes Yes Yes ENA Yes T2 Yes Yes Yes Yes X1 Yes Yes Yes Yes ENA Yes Instance Limits There is a limit on the total number of instances that you can launch in a region, and there are additional limits on some instance types. For more information about the default limits, see How many instances can I run in Amazon EC2? For more information about viewing your current limits or requesting an increase in your current limits, see Amazon EC2 Service Limits (p. 851) . T2 Instances T2 instances are designed to provide moderate baseline performance and the capability to burst to significantly higher performance as required by your workload. They are intended for workloads that don't use the full CPU often or consistently, but occasionally need to burst. T2 instances are well suited for general purpose workloads, such as web servers, developer environments, and small databases. For more information about T2 instance pricing and additional hardware details, see Amazon EC2 Instances . If your account is less than 12 months old, you can use a t2.micro instance for free within certain usage limits. For more information, see AWS Free Tier . Contents • Hardware Specifications (p. 163) • T2 Instance Requirements (p. 163) • CPU Credits (p. 163) • Monitoring Your CPU Credits (p. 165) 162
Amazon Elastic Compute Cloud User Guide for Linux Instances T2 Instances Hardware Specifications For more information about the hardware specifications for each Amazon EC2 instance type, see Amazon EC2 Instances . T2 Instance Requirements The following are the requirements for T2 instances: • You must launch your T2 instances into a virtual private cloud (VPC); they are not supported on the EC2-Classic platform. Amazon VPC enables you to launch AWS resources into a virtual network that you've defined. You cannot change the instance type of an existing instance in EC2-Classic to a T2 instance type. For more information about EC2-Classic and EC2-VPC, see Supported Platforms (p. 618) For more information about launching a VPC-only instance, see Instance Types Available Only in a VPC (p. 617) .
- Spring '16
- ........., Amazon Web Services, Amazon Elastic Compute Cloud, Amazon Virtual Private Cloud