ECS resource limits and quotas - Elastic Compute Service

Elastic Compute Service (ECS) has limits on its features, performance, and quotas. You can request an increase for some of these quotas. Before you use ECS, review the limits to ensure the service meets your business needs. Plan ahead to request quota increases or to work around limits that cannot be changed. This topic describes the limits of ECS and explains how to request an increase.

Explanation of table columns

Review the tables in each section to understand the specific limits. The table columns are explained as follows:

Limit item: The product 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.
Restriction: This section describes the restrictions for this item.
If the limit item is an ECS quota, it has a quota ID. You can use the quota ID to query the maximum value of the limit.
How to increase the quota: Indicates whether you can request an increase for the limit.
If a limit cannot be increased, you must plan your resources to stay within the specified limit. If a limit can be increased, you can follow the specified method to request an increase.

Instances

Limit item	Limit	How to increase the quota
vCPU quota items	The maximum number of vCPUs of an instance family that a single Alibaba Cloud account can have in a specific region for a specific billing method (subscription, pay-as-you-go, or spot). For more information, see vCPU quota items.	View or increase ECS instance type quotas
GPU card and vGPU quota items	The maximum number of GPU cards of an instance family or the maximum number of vGPU instances that a single Alibaba Cloud account can have in a specific region for a specific billing method (subscription, pay-as-you-go, or spot). For more information, see GPU card 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	To view the quota, use 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 a pay-as-you-go instance to a subscription instance.	None
Convert subscription to pay-as-you-go	When you convert a subscription instance to a pay-as-you-go instance, a refund is issued. Refunds consume your refund quota. If your monthly refund quota is exceeded, you cannot process 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
Loading external hardware devices	You cannot directly load external hardware devices, such as hardware dongles, USB flash drives, external hard disks, or bank USB keys. You can try using software dongles or dynamic password for secondary authentication.	None
Multicast protocol	The multicast protocol is not supported. To achieve one-to-many communication similar to multicast, use unicast point-to-point communication 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 a period of 3 months or longer. Each ECS instance can be used for ICP filings for 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 cause the license to become invalid.	None

vCPU quota items

Note

When you view a quota, the specified quantity is 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 card and vGPU quota items

Note

When you view a quota, the specified quantity is the maximum number of GPU cards or vGPU instances for a single Alibaba Cloud account in the current region, not the total maximum number across all regions.

Images

Limit item	Limit	How to increase the quota
Maximum number of custom images that a single Alibaba Cloud account can retain 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 memory cannot use 32-bit images.	None

For more information about images, see Overview of images.

Block storage

Limit item	Limit	How to increase the 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 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, you need to attach them after the instance is created. You can call the DescribeInstanceTypes API to query the maximum number of disks that can be attached to different instance types.	None
Disk capacity quota for a single Alibaba Cloud account in a specific region and zone	The capacity quota varies by disk category. You can view the 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
Capacity of a single regional 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 per 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 operating systems: 20 GiB to 2,048 GiB Note The maximum capacity of a basic disk (a retired disk category) used as a system disk is 500 GiB.	None
Can you attach new local disks to an instance with local disks?	No.	None
Can you change the configuration of an instance with local disks?	You can change only the bandwidth.	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`, the 27th is `/dev/xvdab`, and so on.	None

Note

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

For more information about block storage, see Overview of block storage.

Snapshots

Limit item	Limit	How to increase the 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), and Germany (Frankfurt): 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), and Germany (Frankfurt): 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	1	None
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	None
Number of concurrent snapshots that can be archived for a single disk	10	None
Block storage class	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 a snapshot	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 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.	None

For more information about snapshots, see Overview of snapshots.

SSH key pairs

Limit item	Limit	How to increase the 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 is supported.	None

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

Public bandwidth

The total public 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 region is as follows:
Note
To request a higher bandwidth limit, use the quota ID q_internet-bandwidth-pay-by-bandwidth-of-postpaid-instance to view and increase the quota. 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

Since November 27, 2020, the peak bandwidth for creating and modifying ECS instances is affected by the account throttling policy:
Note
If you need a higher peak bandwidth, you can submit a ticket.
- The total peak bandwidth of all pay-by-traffic ECS instances under a single Alibaba Cloud account in a region cannot exceed 5 Gbps.
- The total peak bandwidth of all pay-by-bandwidth ECS instances under a single Alibaba Cloud account in a region cannot exceed 50 Gbps.

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

Important

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

Limit item	Limit	How to increase the quota
Peak inbound bandwidth per 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 per 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. 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.	None
Limit on replacing the assigned public IP address for 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 about public bandwidth, see Public bandwidth.

Elastic network interfaces

Limit item	Limit	How to increase the 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 instances	The instance and the ENI to be attached 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 network interface cards 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 about ENIs, see Overview of ENIs.

Prefix lists

Limit item	Limit	How to increase the 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 about prefix lists, see Overview of prefix lists.

Security groups

Limit item	Basic security group limits	Enterprise security group limits
Maximum total 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 total number of rules (including inbound and outbound rules) for all security groups associated with a single ENI	1,000	Same as for basic security groups
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.
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 that 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 on ECS instances is restricted by default. We recommend that you use an SSL-encrypted port (typically port 465) to send outbound emails.	Same as for basic security groups

For more information about security groups, see Overview of security groups.

Reserved instances

Limit item	Limit	How to increase the 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 as reserved instances are subject to what is displayed on the buy page.	None
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. The costs of 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-type reserved instance already includes the Windows image fee. It can offset the image portion of the bill for a pay-as-you-go instance running Windows.	None

For more information about reserved instances, see What are reserved instances?.

Savings plans

Limit item	Limit	How to increase the quota
Number of savings plans that 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 the 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 (not of a specified instance type), only computing resources (vCPUs and memory) can be offset. 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

Limit item	Limit	How to increase the 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	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. Backup vault storage capacity for Cloud Backup. Photo and Drive Service.	None
Offset type	Only pay-as-you-go bills can be offset. Bills for cloud disks of spot instances cannot be offset.	None
Effective period	You can set the effective period, but it cannot exceed six months from the creation time.	None
Create and manage SCUs using API operations	Not supported.	None

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

Launch templates

Limit item	Limit	How to increase the 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	All parameters are optional when you create a launch template. However, if required parameters such as instance type and image are not included in the template, you must provide them when you use the template to create an instance.	None
Modify a created launch template	You cannot modify a launch template after it is created. You can create a new version of the launch template to change configuration parameters. For more information, see Manage launch template versions.	None

For more information about launch templates, see Overview of launch templates.

Deployment sets

Limit item	Limit	How to increase the 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 that a deployment set can contain depends on the deployment policy you select. For more information, see Deployment policies.	None
Create Dedicated Hosts in a deployment set	Deployment sets do not support creating 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 the low-latency network policy must be in the same zone.	None
Instance types that can be created in a deployment set	Different deployment policies support only specific instance families. You can call DescribeDeploymentSetSupportedInstanceTypeFamily and specify a deployment policy to query the instance families supported by each policy.	None
Merge deployment sets	Deployment sets cannot be merged.	None

For more information about deployment sets, see Deployment sets.

Auto provisioning groups

Limit item	Limit	How to increase the 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 only one version of a launch template as the base 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 configured 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 about auto provisioning groups, see Overview of auto provisioning.

Cloud Assistant

Limit item	Limit	How to increase the quota
Total 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.	None
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.	None
Maximum number of activation codes for 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.	None
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 immediately and save command: The file size cannot exceed 18 KB. Run immediately but do not save command: The file size cannot exceed 24 KB. Upload 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 the following operating systems: Alibaba Cloud Linux CentOS 6/7/8 and later CoreOS Debian 8/9/10 and later OpenSUSE RedHat 5/6/7 and later Note For RedHat, you must download the RPM package and install the Cloud Assistant Agent yourself. 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 public images provided by ECS have the Cloud Assistant Agent installed by default. For instances created from custom images or Alibaba Cloud Marketplace images, you must confirm that the operating system supports Cloud Assistant and install the Cloud Assistant Agent yourself. For more information, see Install the Cloud Assistant Agent.	None

For more information about Cloud Assistant, see Overview of Cloud Assistant.

Network connectivity diagnostics

Limit item	Limit	How to increase the 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 diagnostic tasks that can run concurrently in a single region	5	None

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

API

Limit item

Limit

How to increase the quota

API rate limits

API rate limits restrict the frequency of OpenAPI calls. Based on the API version and resource type, they fall into two categories:

ECS API rate limits: Rate limits for API operations of version 2014-05-26, such as those for images, security groups, and block storage.
For more information about how to view ECS API rate limits, see View ECS API rate limits.
Block Storage API rate limits: Rate limits for advanced block storage API operations of version 2021-07-30.
For more information about how to view Block Storage API rate limits, see View or increase Block Storage API rate limits.

ECS API rate limits: These rate limits cannot be increased.
Block Storage API rate limits: You can request an increase. For more information, see View or increase Block Storage API rate limits.

For more information about ECS APIs, see Integration overview.

Quota ID	Quota item description	Applicable instance families (Click a link in this column to view the specific instance types.)	Quota	How to increase the 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 Retired 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 (scc) instances	Super Computing Cluster 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 The 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, or re4) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency (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	Maximum number of vCPUs for pay-as-you-go restricted-purchase instances	xn4, n4, mn4, and e4, previous-generation shared instance families Retired 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 high-performance computing (scc) instances	Super Computing Cluster instance types (excluding the 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, or re4) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency (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	Maximum number of vCPUs for spot restricted-purchase instances	xn4, n4, mn4, and e4, previous-generation shared instance families Retired 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	Maximum number of vCPUs for spot high-performance computing (HPC) instances (scc)	Super Computing Cluster instance types (excluding GPU-accelerated compute-optimized SCC 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_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, or re4) Memory-optimized instance families (r series) (excluding se1ne and se1) Universal instance families (U instances) High frequency (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), China (Shenzhen)	50 Gbps
China (Hong Kong), Singapore	20 Gbps
Other	10 Gbps