ECS resource limits and quotas - Elastic Compute Service

Elastic Compute Service (ECS) has limits on its features, performance, and quotas. Before you use ECS, you should understand these limits to ensure that the service can meet your business requirements. You can plan your resources and apply for quota increases in advance. This topic describes the limits of ECS and explains how to increase them.

Table dimensions

View the tables in this topic to learn about the specific limits. The columns in the tables are described as follows:

Item: The feature, performance metric, or quota that has a limit.
Note
A quota is the maximum amount of a cloud resource that an Alibaba Cloud account can use or the maximum number of operations that the account can perform.
Limit: The specific limit on the item.
If the item is an ECS-related quota, it has a quota ID. You can use the quota ID to query the current quota value.
How to increase the limit: The method to increase the limit on the item.
If a limit cannot be increased, you must plan accordingly. If a limit can be increased, you can apply for a quota increase as needed.

Instances

Restrictions	Limit	How to increase the limit
vCPU quotas	The maximum number of vCPUs for an instance family that an Alibaba Cloud account can have in a specific region with a specific billing method (subscription, pay-as-you-go, or spot instance). For more information about the limits, see vCPU quotas.	View or increase the quotas of ECS instance types
GPU and vGPU quotas	The maximum number of GPUs or vGPU instances for an instance family that an Alibaba Cloud account can have in a specific region with a specific billing method (subscription, pay-as-you-go, or spot instance). For more information about the limits, see GPU and vGPU quotas.	View or increase the quotas of ECS instance types
Maximum number of subscription instances that an Alibaba Cloud account can purchase at a time in a region	View the quota based on the quota ID `q_prepaid-instance-count-per-once-purchase`. For more information, see View or increase ECS quotas.	None
Convert pay-as-you-go to subscription	No limit on the number of instances or the quota. You cannot convert retired instance types to the subscription billing method. For more information, see Convert the billing method of instances from pay-as-you-go to subscription.	None
Convert subscription to pay-as-you-go	When you convert the billing method from subscription to pay-as-you-go, a refund is generated. The refund consumes your refund quota. If your refund quota for the current month is exceeded, you cannot request more refunds. This means you cannot convert the billing method from subscription to pay-as-you-go. For more information, see Convert the billing method of instances from subscription to pay-as-you-go. Note The refund quota is subject to the amount displayed on the conversion page. The quota is reset to zero on the first day of the next month.	None
Instance families that support secondary virtualization	Only ECS Bare Metal Instances and Super Computing Clusters support secondary virtualization. Other instance families do not support the installation of virtualization software or secondary virtualization.	None
Sound card applications	Sound card applications are not supported.	None
Attach external hardware devices	External hardware devices, such as hardware dongles, USB flash drives, external hard disks, and bank U-keys, cannot be directly attached. Try using software dongles or dynamic password-based secondary authentication.	None
Multicast protocol	The multicast protocol is not supported. To achieve one-to-many communication similar to multicast, use the unicast point-to-point method as an alternative.	None
Website ICP filing	To apply for an ICP filing for a website or app, you must purchase a subscription ECS instance for 3 months or longer. Each ECS instance can be used for ICP filings for a maximum of 5 websites or apps. For more information, see Check the server for ICP filing.	None
License	Some software or application licenses must be bound to the hardware information of an ECS instance. Migrating an ECS instance may change its hardware information. This can cause licenses that are bound to the hardware to become invalid.	None

vCPU quotas

Note

When you view a quota, the value indicates the maximum number of vCPUs for your Alibaba Cloud account in the current region, not the total maximum number of vCPUs across all regions.

GPU and vGPU quotas

Note

When you view a quota, the value indicates the maximum number of GPUs or vGPU instances for your Alibaba Cloud account in the current region, not the total maximum number of GPUs or vGPU instances across all regions.

Images

Restrictions	Limit	How to increase the limit
Maximum number of custom images that an Alibaba Cloud account can retain in a region	View the quota based on the quota ID `q_user-image-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Maximum number of accounts with which a custom image can be shared	View the quota based on the quota ID `q_user-per-image-shared-user-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Limits on images and instance types	Instance types with 4 GiB of memory or more do not support 32-bit images.	None

For more information about images, see Image overview.

Block storage

Limitations	Limit	How to increase the limit
Number of system disks per instance	1	None
Number of data disks per instance	The maximum number of disks that you can attach to an instance varies by instance type. For more information, see Instance families. Note When you create an instance, you can attach a maximum of 1 system disk and 16 data disks. If the instance requires more data disks, attach them after the instance is created. You can call the DescribeInstanceTypes operation to query the maximum number of disks that can be attached to an instance of a specific type.	None
Disk capacity quota for an Alibaba Cloud account in a specific region and zone	The disk capacity quota varies by disk category. You can view the capacity quota for each disk category. For more information, see View or increase block storage quotas.	View or increase block storage quotas
Capacity of a single basic disk	5 GiB to 2,000 GiB	None
Capacity of a single standard SSD	20 GiB to 32,768 GiB	None
Capacity of a single ultra disk	20 GiB to 32,768 GiB	None
Capacity of a single ESSD	PL0: 1 GiB to 65,536 GiB PL1: 20 GiB to 65,536 GiB PL2: 461 GiB to 65,536 GiB PL3: 1,261 GiB to 65,536 GiB	None
Capacity of a single ESSD AutoPL disk	1 GiB to 65,536 GiB	None
Single ESSD Entry disk	10 GiB to 32,768 GiB	None
Single Regional Enterprise SSD (ESSD)	1 GiB to 65,536 GiB	None
Capacity of a single local SSD	5 GiB to 800 GiB	None
Total capacity of local SSDs on a single instance	1,024 GiB	None
Capacity of a single elastic ephemeral disk	64 GiB to 8,192 GiB	None
Capacity limit of a single system disk	Windows Server: 40 GiB to 2,048 GiB FreeBSD: 30 GiB to 2,048 GiB Other Linux systems: 20 GiB to 2,048 GiB Note If a basic disk (a previous-generation disk that is being phased out) is used as a system disk, its maximum capacity is 500 GiB.	None
Whether you can attach new local disks to an instance that has local disks	Not allowed.	None
Whether you can change the configuration of an instance that has local disks	Only the bandwidth can be changed.	None
Mount point range for Linux system disks	`/dev/vda`	None
Mount point range for Linux data disks	The naming of mount points varies based on the number of attached data disks: 1 to 25 data disks: `/dev/xvd[b-z]`. More than 25 data disks: `/dev/xvd[aa-zz]`. For example, the 26th data disk is named `/dev/xvdaa`, and the 27th is `/dev/xvdab`.	None

Note

Block storage is calculated in binary units, where 1 GiB = 1,024 MiB.

For more information about block storage, see Block storage overview.

Snapshots

Limitations	Limit	How to increase the limit
Number of manual snapshots that can be retained for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), and Thailand (Bangkok): 2,000 Other regions: 256	None
Number of automatic snapshots that can be retained for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), and Thailand (Bangkok): 2,000 Other regions: 1,000	None
Number of archived snapshots that can be retained for a single disk	10,000	None
Number of automatic snapshot policies that an Alibaba Cloud account can retain in a single region	100	None
Number of automatic snapshot policies that can be applied to a single disk	1	None
Number of snapshots that can be concurrently created for a single disk	Enterprise SSD (ESSD) series disks (ESSDs, ESSD AutoPL disks, ESSD Entry disks, and Regional ESSDs): 10 Legacy disks (standard SSDs, ultra disks, and basic disks): 1	None
Number of snapshots that can be concurrently archived for a single disk	10	None
Block storage type	You cannot create snapshots for local disks or elastic ephemeral disks. Only ESSD series disks (ESSDs, ESSD AutoPL disks, and ESSD Entry disks) for which the multi-attach feature is disabled support the snapshot-consistent group feature. For information about the multi-attach feature, see Multi-attach for cloud disks. Only ESSD series disks (ESSDs, ESSD AutoPL disks, ESSD Entry disks, and Regional ESSDs) support the IA feature. For more information, see Use the instant access feature.	None
Download or export snapshots	You cannot download or export created snapshots. You can create custom images from snapshots and export the custom images to your on-premises device.	None
Constraints on manual and automatic snapshot creation	ESSD series disks (ESSD, ESSD AutoPL, ESSD Entry, and ESSD zone-redundant disks) A single disk supports the concurrent creation of manual and automatic snapshots. However, the number of concurrent snapshots that can be created is limited. For more information, see Snapshot limits. If the number of concurrent snapshots that are being created for a disk reaches the upper limit, subsequent snapshot creation tasks fail. Previous generation disks (standard SSDs, ultra disks, and basic disks) Concurrent creation of manual and automatic snapshots is not supported. At the point in time when an automatic snapshot is scheduled to be created, if a snapshot (manual or automatic) is being created for the disk, the system does not create an automatic snapshot at this point in time. An automatic snapshot is created at the next scheduled point in time. If an automatic snapshot is being created for a disk, you must wait for the automatic snapshot to be created before you can manually create a snapshot.	None

For more information about snapshots, see Snapshot overview.

SSH key pairs

Limits	Limit	How to increase the limit
SSH key pair quota for an Alibaba Cloud account in a single region	500	None
Image types that support SSH key pairs	Only Linux systems are supported.	None

For more information about SSH key pairs, see Manage SSH key pairs.

Public bandwidth

Total peak public bandwidth limit for all pay-as-you-go and spot instances that are billed on a pay-by-bandwidth basis for an Alibaba Cloud account in a single region:
Note
To request a higher bandwidth limit, you can view and apply to increase the quota using the quota ID q_internet-bandwidth-pay-by-bandwidth-of-postpaid-instance. For more information, see View or increase ECS quotas.
Region
Limit
China (Beijing), China (Shanghai), China (Hangzhou), China (Shenzhen)
50 Gbps
Hong Kong (China), Singapore
20 Gbps
Other
10 Gbps

Since November 27, 2020, the peak bandwidth for creating and upgrading ECS instances has been subject to account throttling policies:
Note
To request a higher peak bandwidth, submit a ticket.
- In a single region, the total actual peak bandwidth of all ECS instances that are billed on a pay-by-traffic basis for an Alibaba Cloud account cannot exceed 5 Gbps.
- In a single region, the total actual peak bandwidth of all ECS instances that are billed on a pay-by-bandwidth basis for an Alibaba Cloud account cannot exceed 50 Gbps.

Limits on the peak bandwidth per instance and public IP address replacement:

Important

For the Pay-by-traffic billing method, the maximum inbound and outbound bandwidth is an upper limit and not a guaranteed performance metric. When resource contention occurs, the maximum bandwidth may be limited. If your business requires guaranteed bandwidth, use the Pay-by-bandwidth billing method.

Limits	Limit	How to increase the limit
Peak inbound bandwidth per instance	If the purchased peak outbound bandwidth is 10 Mbit/s or less, Alibaba Cloud allocates an inbound bandwidth of 10 Mbit/s. If the purchased peak outbound bandwidth is greater than 10 Mbit/s, Alibaba Cloud allocates an inbound bandwidth equal to the purchased peak outbound bandwidth.	None
Peak outbound bandwidth per instance	Pay-by-traffic: Subscription instance: 200 Mbit/s Pay-as-you-go instance: 100 Mbit/s Pay-by-bandwidth: 200 Mbit/s Note The maximum public bandwidth of an ECS instance is also related to the instance type. You can view the Baseline Network Bandwidth metric in the Instance families list. The total public bandwidth of a single instance cannot exceed this limit. Some instance types, such as ecs.t6-c4m1.large, ecs.t6-c2m1.large, ecs.t6-c1m1.large, and ecs.t6-c1m4.large, are subject to a baseline network bandwidth limit, with a peak of 80 Mbit/s.	None
Limit on replacing the public IP address of a single instance	You can replace the public IP address of a new instance within six hours after creation. The IP address of an instance can be replaced a maximum of three times.	None

For more information about public bandwidth, see Public bandwidth.

Elastic network interfaces

Limits	Limit	How to increase the limit
Maximum number of secondary Elastic Network Interfaces (ENIs) that an Alibaba Cloud account can create in a region	View the quota based on the quota ID `q_elastic-network-interfaces`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
VPC and zone limits for attaching ENIs to instances	An instance and its attached ENIs must be in the same VPC and the same zone. Multiple ENIs attached to an instance can belong to different vSwitches in the same VPC and zone. If you attach two or more ENIs from the same subnet to an instance, network issues such as asymmetric routing may occur. You can assign one or more secondary private IP addresses to a primary or secondary ENI to achieve high utilization of VPC-type ECS instances and to transfer traffic during a failover. For more information, see Secondary private IP addresses.	None
Maximum number of ENIs that can be attached to a single instance	The number of ENIs that can be attached to an instance is determined by its instance type. For more information, see the ENIs column in Instance families.	None

For more information about ENIs, see ENI overview.

Prefix lists

Limits	Limit	How to increase the limit
Maximum number of prefix lists for an Alibaba Cloud account in a single region	100	None
Maximum number of entries in a single prefix list	200	None
Maximum number of associated resources for a single prefix list	1,000	None

For more information about prefix lists, see Prefix list overview.

Security groups

Limits	Limit on basic security groups	Limit on enterprise security groups
Maximum number of security groups for an Alibaba Cloud account in a region	You can view or apply to increase the quota using the quota ID `q_security-groups`. For more information, see View or increase ECS quotas.	Same as for basic security groups.
Maximum number of security groups that can be associated with a single ENI	10	Same as for basic security groups.
Maximum number of rules (inbound and outbound) in all security groups associated with a single ENI	1,000	Same as for basic security groups.
Maximum number of rules in a single security group where the authorization object is a security group	20	0. In an enterprise security group, you cannot add rules where the authorization object is a security group. You also cannot use an enterprise security group as the authorization object in other security group rules.
Maximum number of VPC-type ECS instances that a single VPC-type security group can contain	Not fixed. The number depends on the number of private IP addresses that the security group can contain.	No limit
Maximum number of private IP addresses that a single VPC-type security group can contain for an Alibaba Cloud account in a region	6,000 Note The number of used IP addresses is calculated based on the number of private IP addresses on the ENIs (including the primary and secondary ENIs of an instance) associated with a security group. This count is the sum of all IP address types, such as primary private IPv4, IPv6, secondary private IPv4, IPv4 prefixes, and IPv6 prefixes. If you have more than 6,000 private IP addresses to access each other over the internal network, add the ECS instances which use the private IP addresses, to multiple security groups, and configure security group rules to allow access between the security groups. You can view the maximum number of private IP addresses in a basic security group in a VPC in the Quota Center by using the quota ID `q_vpc-normal-security-group-ip-count`.	65,536 Note The number of used IP addresses represents the total number of ENIs associated with a security group, including both primary and secondary network interfaces of an instance.
Public access ports	For security reasons, port 25 on ECS instances is disabled by default. We recommend that you use an SSL-encrypted port, typically port 465, to send emails.	Same as for basic security groups.

For more information about security groups, see Security group overview.

Reserved instances

Restrictions	Limit	How to increase the limit
Total number of regional reserved instances for an Alibaba Cloud account across all regions	20	Submit a ticket
Number of zonal reserved instances for an Alibaba Cloud account in a single zone	20	Submit a ticket
Reserved Instance Specifications	The gn6i and t5 instance families do not support regional reserved instances. You also cannot split or merge them. Note The instance types available for purchase are displayed on the buy page.	None
Eligible resources	Only pay-as-you-go instances (excluding spot instances) are eligible for deduction. Only fees for compute resources (vCPUs and memory) can be deducted. Fees for network, storage, and other resources cannot be deducted. For more information about ECS instance billing, see Billing overview. Reserved instances for Windows can also deduct image fees. Note The cost of a reserved instance for Windows already includes the Windows image fee. It can deduct the image portion of the bill for pay-as-you-go instances running Windows.	None

For more information about reserved instances, see What is a reserved instance?

Savings plans

Limits	Limit	How to increase the limit
Number of savings plans that an Alibaba Cloud account can purchase	200	None
Eligible resources	Only pay-as-you-go ECS and ECI instances (excluding spot instances) are eligible for deduction. For more information about deductible items and deduction rules, see Deductible items and deduction rules for savings plans. For ECS instances, savings plans can deduct fees for: compute resources (vCPU and memory), images, system disks, data disks (including capacity fees, provisioned performance fees, and performance burst fees), and fixed public bandwidth. For more information about ECS instance billing, see Billing overview. For ECI instances (non-specified instance types), savings plans can deduct fees only for compute resources (vCPU and memory). For more information about ECI instance billing, see ECI instance billing.	None

For more information about savings plans, see What is a savings plan?

Storage Capacity Units

Limits	Limit	How to increase the limit
Maximum capacity of a Storage Capacity Unit (SCU) that can be purchased at a time	50 TiB	Submit a ticket
Maximum number of SCUs that can be purchased in a single region	100	None
Product types supported by SCUs	ESSDs, standard SSDs, ultra disks, and basic disks. Capacity NAS and Performance NAS. Standard snapshots. OSS Standard, OSS Infrequent Access, and OSS Archive. Storage capacity of Cloud Backup backup vaults. Album and Drive Service.	None
Deductible types	Only pay-as-you-go bills can be deducted. Pay-as-you-go bills for disks on spot instances cannot be deducted.	None
Effective time	You can set an effective time, but it cannot be more than six months after the creation time.	None
Create and manage SCUs using an API	Not supported.	None

For more information about SCUs, see Storage Capacity Units (SCUs).

Launch templates

Limits	Limit	How to increase the limit
Maximum number of launch templates that an Alibaba Cloud account can have in a region	View the quota based on the quota ID `q_launch-template-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Maximum number of versions for a single launch template that an Alibaba Cloud account can have in a region	View the quota based on the quota ID `q_launch-template-version-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Launch template parameters	When you create a launch template, all parameters are optional. However, if a launch template does not include required parameters, such as the instance type and image, you must specify these parameters when you use the template to create an instance.	None
Modify a created launch template	After a launch template is created, it cannot be modified. You can create a new version of the launch template to change the configuration parameters. For more information, see Manage launch template versions.	None

For more information about launch templates, see Launch template overview.

Deployment sets

Limitations	Limit	How to increase the limit
Maximum number of deployment sets that an Alibaba Cloud account can have in a region	View the quota based on the quota ID `q_deployment-set-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Number of instances that a single deployment set can contain	The number of instances that a deployment set can contain depends on the deployment strategy you choose. For more information, see Deployment strategies.	None
Create Dedicated Hosts in a deployment set	You cannot create Dedicated Hosts in a deployment set.	None
Region and zone limits	Instances and deployment sets must be in the same region. Instances in a deployment set that uses the low-latency network strategy must all be in the same zone.	None
Instance types that can be created in a deployment set	Different deployment strategies support only specific instance families. You can call the DescribeDeploymentSetSupportedInstanceTypeFamily operation and specify a deployment strategy to get the supported instance families.	None
Merge deployment sets	Deployment sets cannot be merged.	None

For more information about deployment sets, see Deployment sets.

Auto provisioning groups

Limitations	Limit	How to increase the limit
Provision instances across regions	Auto provisioning groups do not support provisioning instances across regions.	None
Maximum number of configuration sources that can be specified for a single auto provisioning group	You can specify only one specific version of a launch template as the basic configuration for instances in a single auto provisioning group. However, you can extend the instance types in the template to form multiple resource pools.	None
Maximum number of resource pools that can be set for a single auto provisioning group	A single auto provisioning group supports a maximum of 20 resource pools (combinations of zones and instance types).	None
Maximum number of instances that can be created in a single auto provisioning group	1,000	None

For more information about auto provisioning groups, see Auto provisioning overview.

Cloud Assistant

Limitations	Limit	How to increase the limit
Maximum number of Cloud Assistant commands for an Alibaba Cloud account in a region	You can view the quota using the quota ID `q_axt-command-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Output size limit for Cloud Assistant tasks for an Alibaba Cloud account in a region	You can view the quota using the quota ID `q_axt-task-output-size`. For more information, see View or increase ECS quotas.	None
Output retention period for Cloud Assistant tasks for an Alibaba Cloud account in a region	You can view the quota using the quota ID `q_axt-task-output-life`. For more information, see View or increase ECS quotas.	None
Maximum number of activation codes for Cloud Assistant managed instances for an Alibaba Cloud account in a region	You can view the quota using the quota ID `q_cloud-assistant-activation-count`. For more information, see View or increase ECS quotas.	None
Maximum number of instances supported for command execution for an Alibaba Cloud account in a region	You can view the quota using the quota ID `q_task-instance-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Size limits for Base64-encoded Bat, PowerShell, or Shell scripts and custom parameters, based on the scenario	Create a command: The file size (after Base64 encoding) cannot exceed 18 KB. Run and save a command: The file size cannot exceed 18 KB. Run a command without saving it: The file size cannot exceed 24 KB. Upload a file: The file size cannot exceed 32 KB.	None
Maximum number of custom parameters in a single command	20	None
Operating system	You can run Cloud Assistant commands only on instances that use the following operating systems: Alibaba Cloud Linux CentOS 6, 7, and 8 or later CoreOS Debian 8, 9, and 10 or later OpenSUSE Red Hat 5, 6, and 7 or later Note For Red Hat, you must download the RPM package to install the Cloud Assistant Agent. For more information, see Install the Cloud Assistant Agent. SUSE Linux Enterprise Server 11, 12, and 15 or later Ubuntu 12, 14, 16, and 18 or later FreeBSD 11, 12, 13, and 14 or later Windows Server 2012, 2016, and 2019 or later Note The Cloud Assistant Agent is installed by default on ECS instances created from public images. For instances created from custom images or Alibaba Cloud Marketplace images, you must first confirm that the operating system supports Cloud Assistant, and then install the Cloud Assistant Agent. For more information, see Install the Cloud Assistant Agent.	None

For more information about Cloud Assistant, see Cloud Assistant overview.

Network connectivity diagnostics

Limits	Limit	How to increase the limit
Maximum number of diagnostic paths in a single region	100	None
Maximum number of diagnostic tasks in a single region	1,000	None
Maximum number of concurrent diagnostic tasks in a single region	5	None

For more information about network connectivity diagnostics, see Diagnose network connectivity.

API

Limitations

Limit

How to increase the limit

API rate quotas

API rate quotas are constraints on the frequency of OpenAPI calls. They are divided into two categories based on the API version and resource type:

Elastic Compute Service (ECS) API rate quotas: Rate limits for APIs of version 2014-05-26 for resources such as images, security groups, and block storage.
To view the ECS API rate quotas, see View ECS API rate quotas.
Block Storage API rate quotas: Rate limits for advanced block storage feature APIs of version 2021-07-30.
To view the Block Storage API rate quotas, see View or increase Block Storage API rate quotas.

Elastic Compute Service (ECS) API rate quotas: You cannot apply to increase this type of API rate quota.
Block Storage API rate quotas: You can apply to increase the quota. For more information, see View or increase Block Storage API rate quotas.

For more information about ECS APIs, see Integration overview.

Quota ID	Quota description	Applicable instance family (Click the link in this column to view the instance types.)	Quota	How to increase the limit
q_ecs_restrict_prepay_c	Maximum number of vCPUs for subscription instances with purchase limits	xn4, n4, mn4, and e4, previous-generation shared instance families Retired instance types	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_local_storage_prepay_c	Maximum number of vCPUs for subscription instances with local storage (d and i series)	big data instance families (d series) instance families with local SSDs (i series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_share_prepay_c	Maximum number of vCPUs for subscription shared entry-level instances (e and t series)	e, economy instance family t6, burstable instance family t5, burstable instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_ebm_prepay_c	Maximum number of vCPUs for subscription ECS Bare Metal Instances (ebm)	ECS Bare Metal Instance types (excluding GPU-accelerated compute-optimized ECS Bare Metal Instance types)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_hpc_prepay_c	Maximum number of vCPUs for subscription High Performance Computing instances (scc)	Super Computing Cluster instance types (excluding GPU-accelerated compute-optimized SCC)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_high_mem_prepay_c	Maximum number of vCPUs for subscription memory-optimized instances (re and se series)	re7p high-memory instance family re6p persistent memory-optimized instance family re6p persistent memory-optimized instance family re4, high-memory instance family re4e, high-memory instance family se1ne, network-enhanced memory-optimized instance family se1, memory-optimized instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_enterprise_prepay_c	Maximum number of vCPUs for subscription enterprise-level compute instances (g, c, r, u, hf, and sn series)	general-purpose instance families (g series) compute-optimized instance families (c series) Enhanced instance families (excluding re6p, re6, or re4 instance families) memory-optimized instance families (r series) (excluding se1ne and se1) universal instance families (U instances) high frequency instance families (hf series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_restrict_postpay_c	Maximum number of vCPUs for pay-as-you-go instances with purchase limits	xn4, n4, mn4, and e4, previous-generation shared instance families Retired instance types	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_local_storage_postpay_c	Maximum number of vCPUs for pay-as-you-go instances with local storage (d and i series)	big data instance families (d series) instance families with local SSDs (i series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_share_postpay_c	Maximum number of vCPUs for pay-as-you-go shared entry-level instances (e and t series)	e, economy instance family t6, burstable instance family t5, burstable instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_ebm_postpay_c	Maximum number of vCPUs for pay-as-you-go ECS Bare Metal Instances (ebm)	ECS Bare Metal Instance types (excluding GPU-accelerated compute-optimized ECS Bare Metal Instance types)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_hpc_postpay_c	Maximum number of vCPUs for pay-as-you-go high-performance computing (HPC) instances (scc)	Super Computing Cluster instance types (excluding the GPU-accelerated compute-optimized instance types)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_high_mem_postpay_c	Maximum number of vCPUs for pay-as-you-go memory-optimized instances (re and se series)	re7p high-memory instance family re6p: persistent memory-optimized instance family re6p persistent memory-optimized instance family re4, high-memory instance family re4e, high-memory instance family se1ne, network-enhanced memory-optimized instance family se1, memory-optimized instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_enterprise_postpay_c	Maximum number of vCPUs for pay-as-you-go enterprise-level compute instances (g, c, r, u, hf, and sn series)	general-purpose instance families (g series) compute-optimized instance families (c series) Enhanced instance families (excluding re6p, re6, and re4 instance families) memory-optimized instance families (r series) (excluding se1ne and se1) universal instance families (U instances) high frequency instance families (hf series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_restrict_spot_c	Maximum number of vCPUs for spot instances with purchase limits	xn4, n4, mn4, and e4, previous-generation shared instance families Retired instance types	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_local_storage_spot_c	Maximum number of vCPUs for spot instances with local storage (d and i series)	big data instance families (d series) instance families with local SSDs (i series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_share_spot_c	Maximum number of vCPUs for spot shared entry-level instances (e and t series)	e, economy instance family t6, burstable instance family t5, burstable instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_ebm_spot_c	Maximum number of vCPUs for spot ECS Bare Metal Instances (ebm)	ECS Bare Metal Instance types (excluding GPU-accelerated compute-optimized ECS Bare Metal Instance types)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_hpc_spot_c	Maximum number of vCPUs for spot HPC instances (scc)	Super Computing Cluster instance types (excluding GPU-accelerated compute-optimized instance types)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_high_mem_spot_c	Maximum number of vCPUs for spot memory-optimized instances (re and se series)	re7p: high-memory instance family persistent memory-optimized instance family re6p re6p persistent memory-optimized instance family re4, high-memory instance family re4e, high-memory instance family se1ne, network-enhanced memory-optimized instance family se1, memory-optimized instance family	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types
q_ecs_enterprise_spot_c	Maximum number of vCPUs for spot enterprise-level compute instances (g, c, r, u, hf, and sn series)	general-purpose instance families (g series) compute-optimized instance families (c series) Enhanced instance families (excluding re6p, re6, or re4 instance families) memory-optimized instance families (r series) (excluding se1ne and se1) universal instance families (U instances) high frequency instance families (hf series)	View the quota based on the quota ID. For more information, see View or increase the quotas of ECS instance types.	View or increase the quotas of ECS instance types

Region	Limit
China (Beijing), China (Shanghai), China (Hangzhou), China (Shenzhen)	50 Gbps
Hong Kong (China), Singapore	20 Gbps
Other	10 Gbps