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Use Limits Overview

Last updated: 2022-08-26 11:00:46

    Account-level Limits for Purchasing CVM Instances

    • You need to sign up for a Tencent Cloud account. For more information, see Signing up for a Tencent Cloud Account.
    • If you create a pay-as-you-go CVM, the system will freeze the cost of one-hour CVM usage. Make sure that your account has sufficient balance for the order.

    CVM Instance Use Limits

    • Virtualized software cannot be installed or re-virtualized (such as installing VMware or Hyper-V).
    • You cannot use sound cards or mount external hardware devices (such as USB flash drives, external disks, and U-keys).
    • Only Linux CVMs can act as a public gateway.

    CVM Instance Purchase Limits

    • The purchase limit of pay-as-you-go CVM instances for each user in each AZ is between 30 and 60.
    • For more information, see Purchase Limits.

    Image Limits

    • Public images: No use limits.
    • Custom images: Each region supports a maximum of 10 custom images.
    • Shared images: Each custom image can be shared with a maximum of 50 Tencent Cloud users. Custom images can only be shared with accounts in the same region as the source account.
    • For more information, see Image Types.

    ENI Limits

    Based on CPU and memory configurations, the number of ENIs bound to a CVM instance differs from the number of private IPs bound to an ENI. The quotes are as shown below:

    Note:

    The number of IP addresses bound to a single ENI indicates the maximum number allowed. The EIP quota is not provided based on this upper limit but based on EIP use limits.

    Model Instance Type Number of ENIs
    CPU: 1 core CPU: 2 cores CPU: 4 cores CPU: 6 cores CPU: 8 cores CPU: 10 cores CPU: 12 cores CPU: 14 cores CPU: 16 cores CPU: >16 cores
    Standard Standard S5 2 4 4 - 6 - - - 8 8
    Standard Storage Optimized S5se - - 4 - 6 - - - 8 8
    Standard SA2 2 4 4 - 6 - - - 8 8
    Standard S4 2 4 4 - 6 - - - 8 8
    Standard Network-optimized SN3ne 2 4 4 - 6 - 8 - 8 8
    Standard S3 2 4 4 - 6 - 8 - 8 8
    Standard SA1 2 2 4 - 6 - - - 8 8
    Standard S2 2 4 4 - 6 - 8 - 8 8
    Standard S1 2 4 4 - 6 - 8 - 8 8
    High IO High IO IT5 - - - - - - - - 8 8
    High IO IT3 - - - - - - - - 8 8
    Memory Optimized Memory Optimized M5 2 4 4 - 6 - 8 - 8 8
    Memory Optimized M4 2 4 4 - 6 - 8 - 8 8
    Memory Optimized M3 2 4 4 - 6 - 8 - 8 8
    Memory Optimized M2 2 4 4 - 6 - 8 - 8 8
    Memory Optimized M1 2 4 4 - 6 - 8 - 8 8
    Compute Compute Optimized C4 - - 4 - 6 - - - 8 8
    Compute Network-optimized CN3 - - 4 - 6 - - - 8 8
    Compute C3 - - 4 - 6 - - - 8 8
    Compute C2 - - 4 - 6 - - - 8 8
    GPU-based GPU Compute GN6 - - - - - - - - - 8
    GPU Compute GN6S - - 4 - 6 - - - - -
    GPU Compute GN7 - - 4 - 6 - - - - 8
    GPU Compute GN8 - - - 4 - - - 8 - 8
    GPU Compute GN10X - - - - 6 - - - - 8
    GPU Compute GN10Xp - - - - - 6 - - - 8
    FPGA-based FPGA Accelerated FX4 - - - - - 6 - - - 8
    Big Data Big Data D3 - - - - 6 - - - 8 8
    Big Data D2 - - - - 6 - - - 8 8
    Big Data D1 - - - - 6 - - - - 8
    CPM Not supported

    Bandwidth Limits

    • Maximum outbound bandwidth (downstream bandwidth)

    • The following rules apply to instances created after 00:00, February 24, 2020:

      Network Billing MethodInstanceMaximum Bandwidth Range (Mbps)
      Instance Billing MethodInstance Configuration
      Bill-by-trafficPay-as-you-go instancesAll0-100
      Bill-by-bandwidthPay-as-you-go instancesAll0-100
      Bandwidth packageAll0-2000
    • The following rules apply to instances created before 00:00, February 24, 2020:

      Network Billing MethodInstanceRange of Bandwidth Cap (Mbps)
      Instance Billing MethodInstance Configuration
      Bill-by-trafficPay-as-you-go instancesAll0-100
      Bill-by-bandwidthPay-as-you-go instancesAll0-100
      Bandwidth packageAll0-2000
    • Maximum inbound bandwidth (upstream bandwidth)
      • Purchased fixed bandwidth > 10 Mbps:Tencent Cloud will assign a public network inbound bandwidth equals to the purchased bandwidth.
      • Purchased fixed bandwidth < 10 Mbps, Tencent Cloud will assign 10-Mbps public network inbound bandwidth.

    Disk Limits

    LimitationsDescription
    Elastic cloud disk capabilityStarting from May 2018, all data disks purchased with CVM instances are elastic cloud disks, which can be unmounted from and remounted to CVM instances. This feature is supported in all availability zones.
    Cloud disk performanceI/O specification applies to both input and output performance at the same time.
    For example, if a 1-TB SSD has a maximum random IOPS of 26,000, it means that both its read and write performance can reach this value. Due to performance limits, if the block size in this example is 4 KB or 8 KB, the maximum IOPS can be reached. If the block size is 16 KB, the maximum IOPS cannot be reached (throughput has already reached the limit of 260 MB/s).
    Elastic cloud disks per CVMA maximum of 20
    Snapshots per region64 + Number of cloud disks in the region x 64
    Attaching cloud disks to a CVMThe CVM instance and cloud disks must be in the same availability zone.
    Snapshot rollbackSnapshot data can only be rolled back to the cloud disk where the snapshot was created.
    Creating cloud disks using snapshot - Type limitOnly snapshots of data disks can be used to create new elastic cloud disks.
    Creating cloud disks using snapshot - Size limitThe capacity of new cloud disk must be larger than the source disk of the snapshot.

    Security Group Limits

    • Security groups are region-specific. A CVM instance can only be bound to security groups in the same region.
    • Security groups are applicable to CVM instances in any network environment.
    • Each user can configure a maximum of 50 security groups for each project in a region.
    • A maximum of 100 inbound or outbound rules can be configured for a security group.
    • One CVM instance can be associated with multiple security groups, and a security group can be associated with multiple CVM instances.
    • Security groups associated with CVM instances on the classic network cannot filter packets from or to TencentDB (MySQL, MariaDB, SQL Server, or PostgreSQL) and NoSQL (Redis or Memcached) databases. Instead, you can use iptables or purchase CFW to filter traffic for such instances.
    • The quotas are as shown below:
      ItemLimit
      Security groups50 per region
      Rules in a security group100 for inbound rules and 100 for outbound rules
      CVM instances associated with a security group2,000
      Security groups associated with a CVM instance5
      Security groups referenced by a security group10

    VPC Limits

    Resource Limit
    VPCs per region per account 20
    Subnets per VPC 100
    Classic network-based CVMs associated with each VPC 100
    Route tables per VPC 10
    Route tables associated with each subnet 1
    Routes per route table 50
    HAVIPs per VPC 10
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