ECS resource usage limits and quotas - Elastic Compute Service

Elastic Compute Service (ECS) is subject to limits on its features, performance, and related quotas. Before you use ECS, you must understand these limits to plan for your business needs. You can request an increase for some quotas, while others are fixed and may require workarounds. This topic describes the limits of ECS and explains how to request an increase for specific quotas.

Column descriptions

The tables in this topic describe the limits for each module and contain the following columns:

Limit item: The feature, performance metric, or quota that is subject to 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.
Limit: The specific restriction for the limit item.
If the limit item is an ECS-related quota, it has a corresponding quota ID that you can use to check its current value.
How to increase quota: The method to request a quota increase, if available.
If a quota cannot be increased, you must plan a workaround. If a quota can be increased, you can request an increase using the specified method.

Instances

Limit item	Limit	How to increase quota
vCPU quota items	The maximum number of vCPUs for a specific 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 specific limits, see vCPU quota items.	View or increase ECS instance type quotas
GPU and vGPU quota items	The maximum number of GPUs or vGPU instances for a specific 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 specific limits, see GPU and vGPU quota items.	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	Use the quota ID `q_prepaid-instance-count-per-once-purchase` to view the corresponding quota. 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 amount. 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.	None
Convert subscription to pay-as-you-go	Converting a subscription instance to a pay-as-you-go instance generates a refund. This refund consumes your refund quota. If your monthly refund quota is exceeded, you cannot receive more refunds. This means you cannot convert subscription instances to pay-as-you-go instances. For more information, see Convert a subscription instance to a pay-as-you-go instance. 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	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 password for secondary authentication.	None
Multicast protocol	The multicast protocol is not supported. To implement one-to-many communication similar to multicast, use unicast point-to-point communication instead.	None
Website ICP filing	To apply for an ICP filing for a website or an app, you must purchase a subscription ECS instance for three months or longer. Each ECS instance can be used for the ICP filing of a maximum of five websites or apps. For more information, see ICP filing server check.	None
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.	None

vCPU quota items

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 maximum number of vCPUs across all regions.

GPU and vGPU quota items

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 maximum number of GPUs or vGPU instances across all regions.

Images

Limit item	Limit	How to increase quota
Maximum number of custom images that a single Alibaba Cloud account can have in a specific region	Use the quota ID `q_user-image-count` to view the corresponding quota. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Maximum number of users with which a single custom image can be shared	Use the quota ID `q_user-per-image-shared-user-count` to view the corresponding quota. 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.	None

For more information, see Image overview.

Block storage

Limit item	Limit	How to increase quota
Number of system disks per instance	1	None
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 call the DescribeInstanceTypes operation to query this limit. 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.	None
Disk capacity quota for a single Alibaba Cloud account in a specific region and zone	The capacity quotas for different types of disks vary. 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	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	Varies by instance type, from 5 GiB to 7,152 GiB	None
Total capacity of local SSDs for a single instance	Varies by instance type, up to 8 × 7,152 GiB	None
Capacity of a single elastic ephemeral disk	64 GiB to 8,192 GiB	None
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 The maximum capacity of a basic disk (a previous-generation disk that is being phased out) used as a system disk is 500 GiB.	None
Whether new local disks can be attached to an instance with local disks	Not allowed.	None
Whether instances with local disks support configuration changes	Only bandwidth changes are allowed.	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/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.	None

Note

Block storage is calculated in binary, which is base-1024. For example, 1 GiB = 1,024 MiB.

For more information, see Block storage overview.

Snapshots

Limit 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 (Chengdu), Japan (Tokyo), SAU (Riyadh - Partner Region), UAE (Dubai), Germany (Frankfurt), China (Qingdao), China (Hong Kong), UK (London), China (Hangzhou), China (Shanghai), Singapore, and Indonesia (Jakarta): 2,000 Other regions: 256	None
Number of automatic snapshots that can be retained for a single disk	China (Hohhot), China (Guangzhou), Philippines (Manila), Thailand (Bangkok), China (Chengdu), Japan (Tokyo), SAU (Riyadh - Partner Region), UAE (Dubai), Germany (Frankfurt), China (Qingdao), China (Hong Kong), UK (London), China (Hangzhou), China (Shanghai), Singapore, and Indonesia (Jakarta): 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 a single Alibaba Cloud account can retain in a single region	100	None
Number of automatic snapshot policies that can be set for a single disk	In the console: 1 API operations: 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), and China (Beijing): 10 Other regions: 1	None
Number of concurrent snapshot creation tasks for a single disk	ESSD series disks (ESSD, ESSD AutoPL, ESSD Entry, and zone-redundant ESSD): 10 Previous generation disks (standard SSD, ultra disk, and basic disk): 1	None
Number of concurrent snapshot archiving tasks for a single disk	10	None
Block storage type	local disks, and elastic ephemeral disks do not support snapshot creation. Currently, only ESSD series disks (ESSD, ESSD AutoPL, and ESSD Entry) support the snapshot-consistent group feature, and the multi-attach feature must be disabled for the disks. Only ESSD series disks (ESSD, ESSD AutoPL, ESSD Entry, and zone-redundant ESSD) support the snapshot instant access feature. For more information, see Snapshot instant access.	None
Download or export snapshots	You cannot download or export created snapshots. You can first use a snapshot to create a custom image, and then export the custom image to a local 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, see Snapshot overview.

SSH key pairs

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

For more information, see Manage SSH key pairs.

Public bandwidth

A limit applies to the total peak public bandwidth that you can purchase for all pay-as-you-go and spot instances that use the pay-by-bandwidth billing method for an Alibaba Cloud account in a region.
Note
If you need a higher bandwidth limit, you can use the quota ID q_internet-bandwidth-pay-by-bandwidth-of-postpaid-instance to view this quota and request an increase. For more information, see View or increase ECS quotas.
Region Name
Limit
China (Beijing), China (Shanghai), China (Hangzhou), China (Shenzhen)
50 Gbps
China (Hong Kong), Singapore
20 Gbps
Other
10 Gbps

Effective November 27, 2020, the peak bandwidth for creating ECS instances and changing their configurations is subject to account-level throttling 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 for 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 for 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 peak inbound and outbound bandwidth values are upper limits and are not guaranteed. In cases of resource contention, the peak bandwidth may be limited. If your business requires guaranteed bandwidth, use the pay-by-bandwidth billing method.

Limit item	Limit	How to increase quota
Peak inbound bandwidth for a single instance	If the purchased peak outbound bandwidth is 10 Mbit/s or less, Alibaba Cloud allocates 10 Mbit/s of inbound bandwidth. If the purchased peak outbound bandwidth is greater than 10 Mbit/s, Alibaba Cloud allocates inbound bandwidth equal to the purchased peak outbound bandwidth.	None
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 cannot exceed this limit. Due to network baseline bandwidth limits, the peak bandwidth for some instance types, such as ecs.t6-c4m1.large, ecs.t6-c2m1.large, ecs.t6-c1m1.large, and ecs.t6-c1m4.large, is 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 of its creation. You can replace the public IP address of an instance a maximum of three times.	None

For more information, see Public bandwidth.

Elastic Network Interface

Limits	Limit	How to increase quota
Maximum number of ENIs (secondary ENIs) that a single Alibaba Cloud account can create in a specific region	Use the quota ID `q_elastic-network-interfaces` to view the corresponding quota. For more information, see View or increase ECS quotas.	View or increase ECS quotas
VPC and zone limits for attaching an ENI to an instance	The instance and the attached ENI must be in the same VPC and zone. Multiple ENIs attached to an instance can belong to different vSwitches in the same VPC and zone. If you attach two or more network interfaces 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.	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 the instance type. For more information, see the Elastic Network Interface column in Instance families.	None

For more information, see ENI overview.

Prefix lists

Limit item	Limit	How to increase quota
Maximum number of prefix lists for a single 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, see Prefix list overview.

Security groups

Limit item	Basic security group limits	Enterprise security group limits
Maximum number of security groups per Alibaba Cloud account in a region	Use the quota ID `q_security-groups` to view or request an increase for the corresponding quota. For more information, see View or increase ECS quotas.	Same as basic security groups
Number of security groups that can be associated with a single Elastic Network Interface (ENI)	10	Same as basic security groups
Maximum total number of rules (inbound and outbound) for all security groups associated with a single ENI	1,000	Same as basic security groups
Number of rules in a single security group where the authorization object is another security group	20	0. In an enterprise security group, you cannot add rules where the authorization object is another security group. You also cannot use an enterprise security group as the authorization object in other security group rules.
Number of VPC-type ECS instances that a single VPC-type security group can contain	Not fixed. The number is affected by the number of private IP addresses the security group can contain.	Unlimited
Number of private IP addresses that a single VPC-type security group can contain for a single Alibaba Cloud account in a specific 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 of ECS instances is restricted by default. Use a Secure Sockets Layer (SSL) encrypted port, usually port 465, to send emails.	Same as basic security groups

For more information, see Security group overview.

Reserved instances

Limit 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 specifications	The 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 actual interface.	None
Resource types that can be offset	Only pay-as-you-go instances (excluding spot instances) can be offset. Only compute resource (vCPU and memory) fees can be offset. Fees 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 fees. Note The purchase price of a Windows-type reserved instance already includes the Windows image fee. It can be used to offset the image portion of the bill for a pay-as-you-go instance running Windows.	None

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

Savings plans

Limit item	Limit	How to increase quota
Number of savings plans a single Alibaba Cloud account can purchase	200	None
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: compute 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 no specified instance type), only compute resources (vCPUs and memory) can be offset. For more information about ECI instance billing, see ECI instance billing.	None

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

Storage capacity units

Limit item	Limit	How to increase quota
Maximum capacity of SCUs 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 file systems and Performance NAS file systems. Standard snapshots. Standard OSS, Infrequent Access OSS, and Archive OSS. Storage capacity of Cloud Backup backup vaults. Albums and Drive service.	None
Offset type	Only pay-as-you-go bills can be offset. Pay-as-you-go bills for disks in spot instances cannot be offset.	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, see Storage Capacity Unit (SCU).

Launch templates

Limit item	Limit	How to increase quota
Maximum number of launch templates a single Alibaba Cloud account can have in a specific region	Use the quota ID `q_launch-template-count` to view the corresponding quota. 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	Use the quota ID `q_launch-template-version-count` to view the corresponding quota. 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 required parameters (such as instance type and image), you must provide them when using the template to create an instance.	None
Modify an existing launch template	After a launch template is created, it cannot be modified. You can change configuration parameters by creating a new version of the launch template. For more information, see Manage launch template versions.	None

For more information, see Launch template overview.

Deployment sets

Limitations	Limit	How to increase quota
Maximum number of deployment sets a single Alibaba Cloud account can have in a specific region	Use the quota ID `q_deployment-set-count` to view the corresponding quota. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Number of instances 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.	None
Create a Dedicated Host in a deployment set	Deployment sets do not support the creation of Dedicated Hosts.	None
Region and zone limits	The instance and the deployment set must be in the same region. Instances in a deployment set with a low-latency network strategy must 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 instance families supported by each strategy.	None
Merge deployment sets	Deployment sets cannot be merged.	None

For more information, see Deployment sets.

Auto provisioning groups

Limits	Limit	How to increase quota
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	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.	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	1000	None

For more information, see Auto provisioning overview.

Cloud Assistant

Limit item	Limit	How to increase quota
Maximum total number of Cloud Assistant commands for a single Alibaba Cloud account in a specific region	Use the quota ID `q_axt-command-count` to view the quota. For more information, see View or increase ECS quotas.	View or increase ECS quotas
Limit on the output size of Cloud Assistant tasks for a single Alibaba Cloud account in a specific region	Use the quota ID `q_axt-task-output-size` to view the quota. For more information, see View or increase ECS quotas.	None
Retention period for the output of Cloud Assistant tasks for a single Alibaba Cloud account in a specific region	Use the quota ID `q_axt-task-output-life` to view the quota. For more information, see View or increase ECS quotas.	None
Maximum number of activation codes for managed instances of Cloud Assistant for a single Alibaba Cloud account in a specific region	Use the quota ID `q_cloud-assistant-activation-count` to view the quota. For more information, see View or increase ECS quotas.	None
Maximum number of instances for command execution per Alibaba Cloud account in a specific region	Use the quota ID `q_task-instance-count` to view the quota. For more information, see View or increase ECS quotas.	View or increase ECS quotas
File size limits for Base64-encoded Bat, PowerShell, or Shell scripts and custom parameters based on the scenario	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.	None
Maximum number of custom parameters per command	20	None
Operating system	Cloud Assistant commands can run 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 5, 6, 7, and later Note For Red Hat, you must download the RPM package and install 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 Instances created from ECS public images have the Cloud Assistant Agent installed by default. 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

Limit item	Limit	How to increase quota
Maximum number of diagnostic lines 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, see Diagnose network connectivity.

API

Limit 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: The rate limit for APIs with the version 2014-05-26, such as those for images, security groups, and block storage.
To view the ECS API rate limit, see View the ECS API rate limit.
Elastic Block Storage API rate limit: The rate limit for advanced block storage feature APIs with the version 2021-07-30.
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: This type of API rate limit cannot be increased.
Elastic Block Storage API rate limit: You can request a quota increase. For more information, see View or increase the Elastic Block Storage API rate limit.

For more information, see Integration overview.

Quota ID	Quota item description	Applicable instance families (Click an instance family link to view specific instance types)	Quota	How to increase quota
q_ecs_restrict_prepay_c	Maximum number of vCPUs for subscription restricted-purchase instances	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. 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	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. 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)	Supercomputing Cluster instance types (excluding GPU-accelerated compute-optimized instance types)	Use the quota ID to view the quota. 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)	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	Use the quota ID to view the quota. 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)	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)	Use the quota ID to view the quota. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_restrict_postpay_c	Maximum number of vCPUs for pay-as-you-go restricted-purchase instances	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. 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	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. 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 high-performance computing (HPC) instances (scc)	Super Computing Cluster instance types (excluding GPU-accelerated compute-optimized instance types)	Use the quota ID to view the quota. 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)	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	Use the quota ID to view the quota. 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)	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)	Use the quota ID to view the quota. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_restrict_spot_c	Maximum number of vCPUs for spot restricted-purchase instances	xn4, n4, mn4, and e4, previous-generation shared instance families Discontinued instance types	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. 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	Use the quota ID to view the quota. 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)	Use the quota ID to view the quota. For more information, see View or increase ECS instance type quotas.	View or increase ECS instance type quotas
q_ecs_hpc_spot_c	Maximum number of vCPUs for spot high-performance computing (HPC) instances (scc)	Supercomputing Cluster instance types (excluding GPU-accelerated compute-optimized instance types)	Use the quota ID to view the quota. 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)	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	Use the quota ID to view the quota. 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)	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)	Use the quota ID to view the quota. 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), China (Shenzhen)	50 Gbps
China (Hong Kong), Singapore	20 Gbps
Other	10 Gbps