Use Limits Overview

Account Limits for Purchasing CVM Instances

• You need to sign up for a Tencent Cloud account. For more information, please see Sign up for Tencent Cloud for registration instructions.
• You need to go through identity verification. For more information on how to verify your identity, please see Identity Verification Guide.
• When you create a postpaid CVM, the system will freeze the CVM fee for one hour. Make sure that the account has sufficient balance to pay for the order.

Use Limits for CVM Instances

• Virtualized software cannot be installed or re-virtualized (such as installing VMware or Hyper-V).
• You cannot use sound card applications or external hardware devices (such as ISO files, USB disks, external disks and U-keys).
• The public gateway is available only in Linux systems.

Purchase Limits for CVM Instances

• For each user in each availability zone, the total quota for postpaid CVM instances is 30.

• For more information, please see Purchase Limits for CVM Instances.

Image Limits

• Public image and service marketplace image: none.
• Custom image: Each region supports a maximum of 10 custom images.
• Shared image: Each custom image can be shared to a maximum of 50 Tencent Cloud users, and can only be shared to the accounts in the same region as the source account.
• For more information, please see Image Type Limits.

ENI Limits

• The number of ENIs bound to a CVM is quite different from that of private IPs bound to an ENI depending on the CPU and memory configurations. These allowed numbers are shown in the following table:

Bandwidth Limits

• Upper Limit of the Outbound Bandwidth (Downstream Bandwidth):

  Network Billing Method	CVM		Available range of the upper limit of bandwidth (Mbps)
  	CVM Billing Method	CVM Configuration
  Bill-by-Traffic	Postpaid CVM	ALL	0-100
  	Prepaid CVM	Cores ≤ 8	0-200
  		8 < Cores < 24	0-400
  		Cores ≥ 24	0-400 or no speed limit
  Bill-by-Bandwidth	Postpaid CVM	ALL	0-100
  	Prepaid CVM	Guangzhou Zone 1 Guangzhou Zone 2 Shanghai Zone 1 Hong Kong Zone 1 Toronto Zone 1	0-200
  		Other availability zones	0-1,000
  Shared bandwidth	ALL		0-200 or no speed limit

• Upper Limit of the Inbound Bandwidth (Upstream Bandwidth):

  • If the fixed bandwidth purchased by users is larger than 10 Mbps, Tencent Cloud assigns the public network inbound bandwidth that is equal to the purchased bandwidth.
  • If the fixed bandwidth purchased by users is less than 10 Mbps, Tencent Cloud assigns 10 Mbps public network inbound bandwidth.

Disk Limits

Security Group Limits

• Security groups are region and project-specific. CVMs can only be associated with the security groups in the same region and project.
• Security groups apply to any CVM instances in network environment.
• Each user can set a maximum of 50 security groups for each project in each region.
• A maximum of 100 inbound/outbound access policies can be set for a security group.
• A CVM can be associated with multiple security groups, and a security group can be associated with multiple CVMs. No number limit is imposed.
• Security groups bound with CVMs in basic network cannot filter data packets sent from (or to) relational database (CDB) and cloud cache service (Redis and Memcached) of Tencent Cloud. If necessary, you can use iptables to filter traffic of such instances.
• The quota limits are as follows:

VPC Limits