Amazon EBS-optimized instance types - Amazon Elastic Compute Cloud (original) (raw)

Amazon EBS–optimized instances use an optimized configuration stack and provide additional, dedicated bandwidth for Amazon EBS I/O. This optimization provides the best performance for your EBS volumes by minimizing contention between Amazon EBS I/O and other traffic from your instance.

When attached to an EBS–optimized instance, General Purpose SSD (gp2 and gp3) volumes are designed to deliver at least 90 percent of their provisioned IOPS performance 99 percent of the time in a given year, and Provisioned IOPS SSD (io1 and io2) volumes are designed to deliver at least 90 percent of their provisioned IOPS performance 99.9 percent of the time in a given year. Throughput Optimized HDD (st1) and Cold HDD (sc1) deliver at least 90 percent of their expected throughput performance 99 percent of the time in a given year. Non-compliant periods are approximately uniformly distributed, targeting 99 percent of expected total throughput each hour. For more information, see Amazon EBS volume types in the Amazon EBS User Guide.

Some instance types are EBS-optimized by default, and there is no need to enable it and no effect if you attempt to disable it. Other instance types optionally support EBS optimization and you can enable it during or after launch for an additional hourly fee. Some instance types do not support EBS optimization.

For detailed instance type specifications and features, see the Amazon EC2 Instance Types Guide.

Considerations

• An instance's EBS performance is bounded by the instance type's performance limits, or the aggregated performance of its attached volumes, whichever is smaller. To achieve maximum EBS performance, an instance must have attached volumes that provide a combined performance equal to or greater than the maximum instance performance. For example, to achieve 80,000 IOPS for r6i.16xlarge, the instance must have at least 5 gp3 volumes provisioned with 16,000 IOPS each (5 volumes x 16,000 IOPS = 80,000 IOPS). We recommend that you choose an instance type that provides more dedicated Amazon EBS throughput than your application needs; otherwise, the connection between Amazon EBS and Amazon EC2 can become a performance bottleneck.
• The maximum number of Amazon EBS volumes that you can attach to an instance depends on the instance type and instance size. For more information, see Amazon EBS volume limits for Amazon EC2 instances.
• The maximum IOPS and throughput limits are interdependent. Depending on your I/O size, you might reach one limit before the other, which can affect overall performance. For optimal results, consider both limits when planning your workload.

EBS-optimized by default

The following instance types are EBS–optimized by default. There is no need to enable EBS optimization and no effect if you disable EBS optimization.

Instances

• General purpose
• Compute optimized
• Memory optimized
• Storage optimized
• Accelerated computing
• High-performance computing

General purpose

Note

M8g instance types support configurable bandwidth weightings. With these instance types, you can optimize an instance's bandwidth for either networking performance or Amazon EBS performance. The following table shows the default Amazon EBS bandwidth performance for these instance types. For more information, see EC2 instance bandwidth weighting configuration.

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

Compute optimized

Note

C8g instance types support configurable bandwidth weightings. With these instance types, you can optimize an instance's bandwidth for either networking performance or Amazon EBS performance. The following table shows the default Amazon EBS bandwidth performance for these instance types. For more information, see EC2 instance bandwidth weighting configuration.

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

Memory optimized

Note

R8g and X8g instance types support configurable bandwidth weightings. With these instance types, you can optimize an instance's bandwidth for either networking performance or Amazon EBS performance. The following table shows the default Amazon EBS bandwidth performance for these instance types. For more information, see EC2 instance bandwidth weighting configuration.

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

Storage optimized

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

Accelerated computing

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

High-performance computing

1 These instances can sustain the maximum performance for 30 minutes at least once every 24 hours, after which they revert to their baseline performance.

2 These instances can sustain their stated performance indefinitely. If your workload requires sustained maximum performance for longer than 30 minutes, use one of these instances.

EBS optimization supported

The following instance types support EBS optimization but EBS optimization is not enabled by default. You must enable EBS optimization, at an additional hourly fee, during or after launch to achieve the level of EBS performance described.

Note

The i2.8xlarge, c3.8xlarge, and r3.8xlarge instances do not have dedicated EBS bandwidth and therefore do not offer EBS optimization. On these instances, network traffic and Amazon EBS traffic share the same 10-gigabit network interface.