Cloud Block Storage (CBS) provides you with persistent data block-level storage services for Cloud Virtual Machines.
- The data in the Cloud Block Storage is automatically stored in multiple copies within the availability zone, avoiding the risk of single point failure of data and providing up to 99.9999999% data reliability.
- Cloud Block Storage provides disk instances of various types and specifications to meet the requirements of stable and low-latency storage performance.
- Cloud Block Storage can be mounted/unmounted on instances in the same availability zone, and storage capacity can be adjusted within minutes to meet flexible data needs. You only need to pay a fair price for the configured resources to enjoy the above features.
Typical use cases
- If the Cloud Virtual Machine is found to have insufficient hard disk storage capacity during use, you can purchase one or more Cloud Block Storages and mount them to the Cloud Virtual Machine to meet the storage capacity requirements.
- No additional storage space is required when purchasing a Cloud Virtual Machine. When storage needs arise, the storage capacity of the Cloud Virtual Machine can be scaled up by purchasing a Cloud Block Storage.
- When there is a demand for data exchange among multiple Cloud Virtual Machines, the demand can be fulfilled by unmounting the Cloud Block Storage (data disk) and remounting it to other Cloud Virtual Machines.
- You can purchase multiple Cloud Block Storages and configure LVM (Logical Volume Manager) logical volumes to break the storage capacity upper-limit of a single Cloud Block Storage.
- You can purchase multiple Cloud Block Storages and configure RAID (Redundant Array of Independent Disks) policies to break the I/O capacity upper-limit of a single Cloud Block Storage.
Lifecycle
The lifecycle of elastic Cloud Block Storage is independent of the Cloud Virtual Machine instance and is not affected by the instance operation. You can attach multiple Cloud Block Storages to a single instance, or detach a Cloud Block Storage from an instance and attach it to another instance.