ECS Bare Metal Instance types & Burstable instance types

Introduction of ECS Bare Metal Instance types


ECS Bare Metal Instance is an innovative computing service developed by Alibaba Cloud based on state-of-the-art virtualization 2.0 technology. Virtualization 2.0 endows ECS bare metal instances with the elasticity of virtual machines (ECS instances), the performance and features of physical machines, and the full support for nested virtualization.

ECS bare metal instances combine the strengths of both physical machines and ECS instances to deliver powerful and robust computing capabilities. ECS Bare Metal Instance uses virtualization 2.0 to provide your business applications with direct access to the processors and memory resources of the underlying servers without virtualization overheads. ECS Bare Metal Instance retains the hardware feature sets (such as Intel VT-x) and resource isolation capabilities of physical machines, which is ideal for applications that need to run in non-virtualization environments.

ECS Bare Metal Instance integrates features from both physical and virtual machines based on the proprietary chips, hypervisor system software, and a redefined server hardware architecture. ECS Bare Metal Instance can seamlessly connect with other Alibaba Cloud services for storage, networking, and database tasks and is fully compatible with ECS images. These properties allow you to build resources to suit your business requirements.

When you use ECS Bare Metal Instance, take note of the following items:
ECS bare metal instances do not support instance type changes.
ECS bare metal instances support failover. When the physical machine that hosts an ECS bare metal instance fails, the instance is failed over. Data is retained in the disks of the instance.

Benefits of ECS Bare Metal Instance types



ECS Bare Metal Instance provides the following benefits based on technological innovations:
Exclusive computing resources
ECS Bare Metal Instance is a cloud-based elastic computing service that provides the same performance and resource isolation capabilities as physical machines. It can ensure the exclusivity of computing resources without virtualization overheads or performance loss. ECS Bare Metal Instance supports high clock speeds and configurations of 8, 32, 80, 96, and 104 vCPUs. An ECS bare metal instance that has eight vCPUs can have a maximum clock speed of 3.7 GHz to 4.1 GHz and provide better performance and faster response for gaming and finance scenarios than competing products.

Chip-level security
In addition to physical isolation, ECS Bare Metal Instance uses a chip-level trusted execution environment of Intel® Software Guard Extensions (SGX) to ensure that encrypted data can be computed only in a secure and trusted environment. This chip-level hardware security protection provides security for your data in the cloud and allows you to control all data encryption and key protection processes. For more information, see Install SGX.

Compatibility with multiple private clouds
ECS Bare Metal Instance can address high-performance computing needs and help you construct hybrid clouds. Thanks to the flexibility, elasticity, and other strengths inherited from the mix of physical and virtual machines, ECS Bare Metal Instance can implement re-virtualization and allow local private clouds to be seamlessly migrated to Alibaba Cloud without performance overheads arising from nested virtualization. This provides you a new method to move business to the cloud.

Support for heterogeneous instruction set processors
ECS Bare Metal Instance uses the virtualization 2.0 technology developed by Alibaba Cloud and supports instruction set processors such as Advanced RISC Machine (ARM) at no additional costs.

This topic describes the features of Elastic Compute Service (ECS) Bare Metal Instance families and lists the instance types of each instance family.

Burstable instance types Overview



Burstable instances are an economical instance type that is intended to meet burst performance requirements in entry-level computing scenarios. This topic describes the features, use scenarios, instance families and instance types, baseline performance, CPU credits, and performance modes of burstable instances.

What are burstable instances?
Burstable instances use CPU credits to maintain computing performance and are suitable for scenarios in which CPU utilization is typically low but experiences occasional bursts. Burstable instances can accumulate CPU credits and consume the credits to burst performance above their CPU baseline as needed by your workloads. This consumption pattern does not affect the environments or applications that are deployed on the instances. Burstable instances are more flexible and cost-effective than other types of instances in terms of CPU utilization.

The CPU credit mechanism allows you to save computing power during off-peak hours for use during peak hours and reduce costs. If you have unplanned performance requirements, you can enable unlimited mode for your burstable instances.

Use scenarios


When you purchase an enterprise-level instance, its vCPUs are exclusively reserved for your use. You are charged for the vCPUs regardless of whether you fully utilize their performance. If you require a high level of CPU performance for only a portion of a day, some vCPU resources are left idle for the remainder of the entire day but you are still charged for these unused resources. To prevent this situation, you can use burstable instances to better meet your business requirements.

Burstable instances apply to scenarios that require higher-than-normal performance for a specific period, such as stress testing service applications, lightweight applications, microservices, and web application servers. We recommend that you evaluate your business requirements to determine the performance levels required during off-peak and peak hours before you make a purchase. The baseline performance of the instances that you purchase must meet your business requirements during off-peak hours to achieve the required performance at significantly lower costs.
Note
If the purchased burstable instances do not meet your requirements, you can change the configurations. For more information, see Configuration changes.
The workloads of Windows applications and graphic UIs have high requirements on CPU utilization. If you create an instance of a t-series burstable instance type, the instance may run slowly or go down. We recommend that you change the instance type to better suit your business requirements. For example, you can select g-series general-purpose instance types, c-series compute-optimized instance types, or r-series memory-optimized instance types.

For more information, please check the official documentation.

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