Tencent Cloud Block Storage (CBS) provides a persistent block storage service for CVM instances.
CBS automatically stores data in multiple redundant copies in an availability zone to eliminate the risk of single points of data failure, providing up to 99.9999999% data reliability.
CBS offers cloud disks of multiple types and specifications to achieve stable and low-latency storage performance.
CBS can be mounted to or unmounted from instances in the same availability zone, and its storage capacity can be altered in a few minutes, meeting elastic storage requirements. Payment is based on actual usage, and allowing you to enjoy all the above features at a low price point.
Typical Use Cases
You can purchase and mount one or more cloud disks to meet the requirements for storage capacity when the disk space on your CVM is insufficient.
You don’t need to purchase extra storage capacity while purchasing a CVM. You can purchase cloud disks later when it’s necessary.
When you need to transfer data from one CVM to another, just detach the cloud data disk from the source CVM and attach it to the target CVM.
Use multiple cloud disks to form a Logical Volume Manager (LVM) to go beyond the physical limit of a single cloud disk.
Use multiple cloud disks to form a Redundant Array of Independent Disks (RAID) configuration to go beyond the I/O performance limit of a single cloud disk.
Lifecycle
Non-elastic cloud disks have a lifecycle that completely follows the CVM. They are purchased together with the CVM and used as system disks, without support for mounting or unmounting.
The lifecycle of an elastic cloud disk is independent of the CVM instance and is not affected by its operation. You can attach multiple cloud disks to a single instance or detach a cloud disk from one instance and attach it to another as a data disk.
Types
Tencent Cloud offers five types of cloud disks: Premium Cloud Disk, SSD Cloud Disk, Balanced SSD Cloud Disk, Enhanced SSD Cloud Disk, and ulTra SSD Cloud Disk. Each type has different performance, features, and pricing. You can refer to the Cloud Disk Types and Cloud Disk Pricing Overview documents to choose the most suitable option based on your application requirements.
Related Actions
For information on CVM instance and cloud disk configurations, see Creating Cloud Disks and Attaching Cloud Disks.
For cloud disk expansion, unmounting, deletion, and other best practices, please refer to Cloud Disk Product Documentation.