ECS resource limits and quotas - Elastic Compute Service

Elastic Compute Service (ECS) has limits on its product features, service performance, and related quotas. Some of these limits can be increased. Before you use ECS, it is important to understand these limits so you can plan accordingly. By requesting quota increases or working around fixed limits, you can ensure that ECS meets your business needs. This topic describes the limits of ECS and explains how to increase some of them.

Table dimension

You can view the tables in this topic to understand the specific limits. The columns in the tables are described as follows:

Restriction item: The product feature, service performance, or related quota that has a limit.
Note
A quota is the maximum amount of a cloud resource or the maximum number of operations that a single Alibaba Cloud account can use.
Limits: The restrictions on the current item.
If the restriction item is an ECS quota, it has a quota ID. You can use the quota ID to query the current maximum value of the quota.
How to increase quota: The method to increase the limit for the restriction item.
If a limit cannot be increased, you need to plan your resources to work around the limit. If a limit can be increased, you can request a quota increase.

Instances

Restriction item	Limit	How to increase quota
vCPU quotas	The maximum number of vCPUs for an instance family that a single Alibaba Cloud account can have in a specific region and for a specific billing method (subscription, pay-as-you-go, or spot). For more information, see vCPU quotas.	View or increase ECS instance type quotas
GPU and vGPU quotas	The maximum number of GPUs or vGPU instances for an instance family that a single Alibaba Cloud account can have in a specific region and for a specific billing method (subscription, pay-as-you-go, or spot). For more information, see GPU and vGPU quotas.	View or increase ECS instance type quotas
Maximum number of subscription instances that a single Alibaba Cloud account can purchase at a time in a specific region	To view the quota, use the quota ID `q_prepaid-instance-count-per-once-purchase`. For more information, see View or increase ECS quotas.	Not applicable
Convert pay-as-you-go to subscription	No limit on the number of instances or the quota. Instance types that are discontinued cannot be converted to subscription. For more information, see Convert a pay-as-you-go instance to a subscription instance.	Not applicable
Convert subscription to pay-as-you-go	Converting a subscription instance to a pay-as-you-go instance generates a refund. This consumes your monthly refund limit. If you exceed the limit, you cannot perform more refunds. This means you cannot convert more subscription instances to pay-as-you-go. For more information, see Convert a subscription instance to a pay-as-you-go instance. Note The refund limit is displayed on the conversion page. The limit resets on the first day of the next month.	Not applicable
Instance families that support secondary virtualization	Only ECS Bare Metal Instances and Super Computing Clusters support secondary virtualization. Other instance families do not support installing virtualization software or secondary virtualization.	Not applicable
Sound card applications	Sound card applications are not supported.	Not applicable
Attaching external hardware devices	You cannot directly attach external hardware devices, such as hardware dongles, USB flash drives, external hard drives, or bank U-Keys. You can try using software dongles or dynamic passwords for secondary authentication.	Not applicable
Multicast protocol	The multicast protocol is not supported. To implement one-to-many communication similar to multicast, use unicast point-to-point communication instead.	Not applicable
Website ICP filing	To apply for an ICP filing for a website or an app, you must purchase a subscription ECS instance with a duration of three months or more. Each ECS instance can be used for ICP filings for a maximum of five websites or apps. For more information, see Check the server for ICP filing.	Not applicable
License	The licenses of some software or applications must be bound to the hardware information of the ECS instance. Migrating an ECS instance may change its hardware information, which can invalidate the license.	Not applicable

vCPU quotas

Note

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

Images

Restriction item	Limit	How to increase quota
Maximum number of custom images that a single Alibaba Cloud account can have in a specific region	To view the quota, use the quota ID `q_user-image-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Maximum number of users with whom a single custom image can be shared	To view the quota, use 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 or more of memory cannot use 32-bit images.	Not applicable

For more information, see Overview.

Block storage

Restriction item	Limit	How to increase quota
Number of system disks per instance	1 unit	Not applicable
Number of data disks per instance	The maximum number of disks that can be attached to an instance varies by instance type. For more information, see Instance families. Note The maximum number of disks that can be attached to an instance is determined by its type. You can query this limit by calling the DescribeInstanceTypes operation. When you create an instance, you can specify a maximum of 1 system disk and 64 data disks. The actual number is subject to what is displayed in the console. If you need more data disks, you can attach them after the instance is created.	Not applicable
Disk capacity quota for a single Alibaba Cloud account in a specific region and zone	The capacity quota varies by disk type. You can view the quota for each disk type. 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	Not applicable
Capacity of a single standard SSD	20 GiB to 32,768 GiB	Not applicable
Capacity of a single ultra disk	20 GiB to 32,768 GiB	Not applicable
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	Not applicable
Capacity of a single ESSD AutoPL disk	1 GiB to 65,536 GiB	Not applicable
Single ESSD Entry disk	10 GiB to 32,768 GiB	Not applicable
Capacity of a single regional ESSD	1 GiB to 65,536 GiB	Not applicable
Capacity of a single local SSD	Depends on the instance type, ranging from 5 GiB to 7,152 GiB	Not applicable
Total capacity of local SSDs per instance	Depends on the instance type, with a maximum of 8 × 7,152 GiB	Not applicable
Capacity of a single elastic ephemeral disk	64 GiB to 8,192 GiB	Not applicable
Capacity limit for a single system disk	Windows Server: 40 GiB to 2,048 GiB FreeBSD: 30 GiB to 2,048 GiB Other Linux operating systems: 20 GiB to 2,048 GiB Note When a basic disk (a previous-generation disk product that is being phased out) is used as a system disk, its maximum capacity is 500 GiB.	Not applicable
Whether you can attach new local disks to an instance with local disks	Not allowed.	Not applicable
Whether instances with local disks support configuration changes	Only bandwidth changes are allowed.	Not applicable
Mount point range for Linux system disks	`/dev/vda`	Not applicable
Mount point range for Linux data disks	The naming of mount points varies with the number of attached data disks: 1 to 25 data disks: `/dev/vd[b-z]`. More than 25 data disks: `/dev/vd[aa-zz]`. For example, the 26th data disk is named `/dev/vdaa`, the 27th is `/dev/vdab`, and so on.	Not applicable

Note

Block storage is calculated in binary units. These units represent data sizes in base 1024. For example, 1 GiB = 1,024 MiB.

For more information about block storage, see Overview.

Snapshots

Restriction item	Limit	How to increase quota
Number of manual snapshots that can be retained for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), Thailand (Bangkok), China (Ulanqab), Indonesia (Jakarta), China (Hong Kong), China (Qingdao), China (Zhangjiakou), US (Silicon Valley), China (Heyuan), China (Shenzhen), China (Beijing), China (Hangzhou), and China (Shanghai): 2,000 Other regions: 256	Not applicable
Number of automatic snapshots that can be retained for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), Thailand (Bangkok), China (Ulanqab), Indonesia (Jakarta), China (Hong Kong), China (Qingdao), China (Zhangjiakou), US (Silicon Valley), China (Heyuan), China (Shenzhen), China (Beijing), China (Hangzhou), and China (Shanghai): 2,000 Other regions: 1,000	Not applicable
Number of archived snapshots that can be retained for a single disk	10,000	Not applicable
Number of automatic snapshot policies that a single Alibaba Cloud account can retain in a single region	100	Not applicable
Number of automatic snapshot policies that can be set for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), Thailand (Bangkok), China (Ulanqab), Indonesia (Jakarta), China (Hong Kong), China (Qingdao), China (Zhangjiakou), US (Silicon Valley), China (Heyuan), China (Shenzhen), China (Beijing), China (Hangzhou), and China (Shanghai): 10 Other regions: 1	Not applicable
Number of concurrent snapshots that can be 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	Not applicable
Number of concurrent archived snapshots that can be created for a single disk	10	Not applicable
Block storage types	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 Snapshot instant access.	Not applicable
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.	Not applicable
Constraints on creating manual and automatic snapshots	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.	Not applicable

For more information about snapshots, see Overview.

SSH key pairs

Restriction item	Limit	How to increase quota
SSH key pair quota for a single Alibaba Cloud account in a single region	500	Not applicable
Image types that support SSH key pairs	Only Linux is supported.	Not applicable

For more information, see Manage SSH key pairs.

Public bandwidth

The total peak bandwidth limit for all pay-as-you-go and spot instances that use the pay-by-bandwidth billing method under a single Alibaba Cloud account in a single region:
Note
If you need a higher bandwidth limit, you can view and request 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 Name
Limit
China (Beijing), China (Shanghai), China (Hangzhou), and China (Shenzhen)
50 Gbps
China (Hong Kong) and Singapore
20 Gbps
Other
10 Gbps

Starting from November 27, 2020, the peak bandwidth for creating and changing the configuration of ECS instances is affected by account-level rate limiting policies:
Note
If you need a higher peak bandwidth, submit a ticket.
- In a single region, the total actual peak bandwidth of all pay-by-traffic ECS instances under a single Alibaba Cloud account cannot exceed 5 Gbps.
- In a single region, the total actual peak bandwidth of all pay-by-bandwidth ECS instances under a single Alibaba Cloud account cannot exceed 50 Gbps.

Limits on the peak bandwidth and public IP address replacement for a single instance:

Important

For the pay-by-traffic billing method, the inbound and outbound peak bandwidth values are upper limits and are not guaranteed. During periods of resource contention, the peak bandwidth may be limited. If your business requires guaranteed bandwidth, use the pay-by-bandwidth billing method.

Restriction item	Limit	How to increase quota
Peak inbound bandwidth for a single instance	If the purchased outbound peak bandwidth is 10 Mbit/s or less, Alibaba Cloud allocates 10 Mbit/s of inbound bandwidth. If the purchased outbound peak bandwidth is greater than 10 Mbit/s, Alibaba Cloud allocates inbound bandwidth equal to the purchased outbound peak bandwidth.	Not applicable
Peak outbound bandwidth for a single instance	Pay-by-traffic: Subscription instances: 200 Mbit/s Pay-as-you-go instances: 100 Mbit/s Pay-by-bandwidth: 200 Mbit/s Note The public bandwidth limit for a single ECS instance also depends on the instance type. You can view the Baseline Network Bandwidth metric in the Instance families list. The total public bandwidth of a single instance will not 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 limited by the baseline network bandwidth to a peak of 80 Mbit/s.	Not applicable
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 of its creation. An instance's public IP address can be replaced a maximum of three times.	Not applicable

For more information about public bandwidth, see Public bandwidth.

Elastic network interfaces

Restriction item	Limit	How to increase quota
Maximum number of ENIs (secondary ENIs) that a single Alibaba Cloud account can create in a specific region	To view the quota, use 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 an instance	The instance and the attached ENI 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 vSwitch to an instance, you may encounter network issues such as asymmetric routing. You can assign one or more secondary private IP addresses to an ENI (primary or secondary) to achieve high utilization of VPC-type ECS instances and traffic failover. For more information, see Secondary private IP addresses.	Not applicable
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 the instance type. For more information, see the Elastic Network Interface column in Instance families.	Not applicable

For more information about elastic network interfaces (ENIs), see Overview.

Prefix lists

Restriction item	Limit	How to increase quota
Maximum number of prefix lists for a single Alibaba Cloud account in a single region	100	Not applicable
Maximum number of entries in a single prefix list	200	Not applicable
Maximum number of associated resources for a single prefix list	1,000	Not applicable

For more information, see Overview.

Security groups

Restriction item	Basic security group limits	Enterprise security group limits
Maximum number of security groups for a single Alibaba Cloud account in a specific region	To view or increase the quota, use the quota ID `q_security-groups`. For more information, see View or increase ECS quotas.	Same as for basic security groups
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) for all security groups associated with a single ENI	1,000	Same as for basic security groups
Maximum number of rules per security group that specify another security group as the authorization object	20	0. You cannot add rules with a security group as the authorization object to an enterprise security group. You also cannot use an enterprise security group as the authorization object in other security group rules.
Number of ECS instances that a security group in a VPC can contain	This number is not fixed. It depends on the number of private IP addresses that the security group can contain.	No limit
Maximum number of private IP addresses that a security group in a VPC can contain per 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 port	For security reasons, port 25 on ECS instances is restricted by default. To send emails, you must use an SSL-encrypted port, such as port 465.	Same as for basic security groups

For more information about security groups, see Overview.

Reserved instances

Restriction item	Limit	How to increase quota
Total number of regional reserved instances for a single Alibaba Cloud account across all regions	20	Submit a ticket
Number of zonal reserved instances for a single Alibaba Cloud account in a single zone	20	Submit a ticket
Reserved instance types	gn6i and t5 instance families do not support regional reserved instances, splitting, or merging. Note The instance types available for purchase with reserved instances are subject to what is displayed on the purchase page.	Not applicable
Resource types that can be offset	Only pay-as-you-go instances (excluding spot instances) can be offset. Only the costs of computing resources (vCPUs and memory) can be offset. Costs for resources such as network and storage cannot be offset. For more information about ECS instance billing, see Billing overview. Windows-type reserved instances also support offsetting image costs. Note The cost of a Windows image is included when you purchase a Windows-type reserved instance. This can offset the image portion of the bill for pay-as-you-go instances running Windows.	Not applicable

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

Savings plans

Restriction item	Limit	How to increase quota
Number of savings plans a single Alibaba Cloud account can purchase	200	Not applicable
Resource types that can be offset	Only pay-as-you-go ECS and ECI instances (excluding spot instances) can be offset. For more information about offset items and rules, see Savings plan offset items and rules. For ECS instances, only the following can be offset: computing resources (vCPUs 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 (with unspecified instance types), only computing resources (vCPUs and memory) can be offset. For more information about ECI instance billing, see ECI instance billing.	Not applicable

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

Storage capacity units

Restriction item	Limit	How to increase quota
Maximum capacity of an 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	Not applicable
Product types supported by SCUs	ESSDs, standard SSDs, ultra disks, and basic disks. Capacity NAS file systems and Performance NAS file systems. Standard snapshots. Standard, Infrequent Access (IA), and Archive OSS. Storage capacity of Cloud Backup backup vaults. Photo Album and Cloud Storage.	Not applicable
Offset type	Only pay-as-you-go bills can be offset. Pay-as-you-go bills for disks of spot instances cannot be offset.	Not applicable
Effective time	You can set an effective time, but it cannot be more than six months after the creation time.	Not applicable
Create and manage SCUs using an API	Not supported.	Not applicable

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

Launch templates

Restriction item	Limit	How to increase quota
Maximum number of launch templates that a single Alibaba Cloud account can have in a specific region	To view the quota, use 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 a single Alibaba Cloud account can have in a specific region	To view the quota, use 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 the launch template does not include necessary parameters, such as instance type and image, you must provide them when you use the template to create an instance.	Not applicable
Modify a created launch template	You cannot modify a launch template after it is created. You can change configuration parameters by creating a new version of the launch template. For more information, see Manage launch template versions.	Not applicable

For more information, see Overview.

Deployment sets

Restriction item	Limit	How to increase quota
Maximum number of deployment sets that a single Alibaba Cloud account can have in a specific region	To view the quota, use 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 a deployment set can contain depends on the deployment strategy you choose. For more information, see Deployment strategies.	Not applicable
Create a dedicated host in a deployment set	Deployment sets do not support creating dedicated hosts.	Not applicable
Region and zone limits	An instance and its deployment set must be in the same region. For deployment sets with a low-latency network strategy, all instances must be in the same zone.	Not applicable
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.	Not applicable
Merge deployment sets	Deployment sets cannot be merged.	Not applicable

For more information, see Deployment sets.

Auto provisioning groups

Restriction item	Limit	How to increase quota
Provision instances across regions	Auto provisioning groups do not support provisioning instances across regions.	Not applicable
Maximum number of configuration sources that can be specified for a single auto provisioning group	A single auto provisioning group can specify a maximum of one specific version of a launch template as the basic configuration for instances. However, you can extend the instance types in the template to form multiple resource pools.	Not applicable
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).	Not applicable
Maximum number of instances that can be created in a single auto provisioning group	1000	Not applicable

For more information, see Overview.

Cloud Assistant

Restriction	Limit	How to increase the quota
Maximum number of Cloud Assistant commands for a single Alibaba Cloud account in a specific region	To view the quota, use 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 a single Alibaba Cloud account in a specific region	To view the quota, use the quota ID `q_axt-task-output-size`. For more information, see View or increase ECS quotas.	Not applicable
Retention period for Cloud Assistant task output for a single Alibaba Cloud account in a specific region	To view the quota, use the quota ID `q_axt-task-output-life`. For more information, see View or increase ECS quotas.	Not applicable
Maximum number of activation codes for Cloud Assistant managed instances for a single Alibaba Cloud account in a specific region	To view the quota, use the quota ID `q_cloud-assistant-activation-count`. For more information, see View or increase ECS quotas.	Not applicable
Maximum number of instances supported for command execution for a single Alibaba Cloud account in a specific region	To view the quota, use the quota ID `q_task-instance-count`. For more information, see View or increase ECS quotas.	View or increase ECS quotas
File size limits for Bat, PowerShell, or Shell scripts and custom parameters after Base64 encoding	Create command: The file size (after Base64 encoding) cannot exceed 18 KB. Run and save command: The file size cannot exceed 18 KB. Run command without saving: The file size cannot exceed 24 KB. Upload file: The file size cannot exceed 32 KB.	Not applicable
Maximum number of custom parameters in a single command	20	Not applicable
Operating system	You can run Cloud Assistant commands only on the following operating systems: Alibaba Cloud Linux CentOS 6, 7, 8, and later CoreOS Debian 8, 9, 10, and later OpenSUSE Red Hat Enterprise Linux 5, 6, 7, and later Note For Red Hat Enterprise Linux, you must download and install the RPM package for the Cloud Assistant Agent. For more information, see Install the Cloud Assistant Agent. SUSE Linux Enterprise Server 11, 12, 15, and later Ubuntu 12, 14, 16, 18, and later FreeBSD 11, 12, 13, 14, and later Windows Server 2012, 2016, 2019, and later Note The Cloud Assistant Agent is installed by default on instances created from ECS public images. For instances that are 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.	Not applicable

For more information about Cloud Assistant, see Overview.

Network connectivity diagnosis

Restriction item	Limit	How to increase quota
Maximum number of diagnostic routes in a single region	100	Not applicable
Maximum number of diagnostic tasks in a single region	1,000	Not applicable
Maximum number of concurrent diagnostic tasks in a single region	5	Not applicable

For more information, see Diagnose network connectivity.

API

Restriction item

Limit

How to increase quota

API rate limit

An API rate limit is a constraint on the frequency of OpenAPI calls. It is categorized into two types based on the API version and resource type:

Elastic Compute Service API rate limit: This applies to APIs with the version 2014-05-26 for resources such as images, security groups, and block storage.
For more information about how to view the ECS API rate limit, see View the ECS API rate limit.
Elastic Block Storage API rate limit: This applies to advanced feature APIs for block storage with the version 2021-07-30.
For more information about how to view the Elastic Block Storage API rate limit, see View or increase the Elastic Block Storage API rate limit.

Elastic Compute Service API rate limit: You cannot request to increase this type of API rate limit.
Elastic Block Storage API rate limit: You can request to increase this quota. For more information, see View or increase the Elastic Block Storage API rate limit.

For more information about ECS APIs, see Integration overview.

Quota ID	Quota description	Applicable instance families (Click a link to view the instance types of an instance family.)	Quota	How to increase quota
q_ecs_restrict_prepay_c	Maximum number of vCPUs for subscription general-purpose instances	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_hpc_prepay_c	Maximum number of vCPUs for subscription high-performance computing (HPC) instances (scc)	SCC instance types (excluding GPU-accelerated compute-optimized instance types)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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, and re4) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency instance families (hf series)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_restrict_postpay_c	vCPU limit for pay-as-you-go instances of instance classes with purchase limits	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_hpc_postpay_c	Maximum number of vCPUs for pay-as-you-go HPC instances (scc)	SCC instance types (excluding GPU-accelerated compute-optimized instance types)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency instance families (hf series)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_restrict_spot_c	vCPU quota for preemptible instances	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_hpc_spot_c	vCPU limit for preemptible high-performance computing (HPC) instances (scc)	SCC instance types (excluding GPU-accelerated compute-optimized)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_high_mem_spot_c	Maximum number of vCPUs for spot 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	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
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, and re4) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency instance families (hf series)	To view the quota, use the quota ID. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas

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