Introduction of Storage Class

Last updated:2021-04-28 11:04:02

To meet different data access frequency and cost requirements, KS3 provides the following storage classes:

  • Standard storage: Provides general-purpose object storage services. Standard storage is applicable to frequently accessed data with hot contents that requires a lower delay and higher throughput, for example, audio, video, picture, and static website resources.

  • Low frequency storage: Applicable to business scenarios where data needs long-term storage but are infrequently accessed. Low frequency storage can provide a millisecond-level delay while reducing the storage cost. It allows for high-speed instant data retrieval. However, infrequent access storage requires a minimum storage duration of 30 days. Deleting an object with a storage duration less than 30 days incurs an early deletion fee. In addition, a data retrieval incurs a data retrieval fee, whether from an internal network or external network.

  • Archive storage: Applicable to business scenarios where data needs to be stored for a long time but rarely needs to be accessed. Compared with standard storage and infrequent access storage, archiving storage can provide the same data reliability and service availability at a greatly reduced cost. However, it takes 1 to 10 minutes of restore time for data to enter a readable state. Therefore, archiving storage is suitable for data that needs long-term storage, such as medical images, archives, business logs, and video materials. Archive storage requires a minimum storage duration of 90 days. Deleting an object with a storage duration less than 90 days incurs an early deletion fee. In addition, a data retrieval incurs a data retrieval fee.

For price information about KS3 storage classes, see KS3 storage pricing.

Comparison of storage classes

Specification Standard storage Low frequency storage Archive storage
Data reliability 99.999999999% 99.999999999% 99.999999999%
Access availability 99.95% 99.9% 99% (After data is restored)
Minimum storage duration N/A 30 days 90 days
Access delay Real-time access, ms-level delay Real-time access, ms-level delay Normal access after 1 to 10 minutes of restore time
Picture processing Supported Supported Supported for restored
Scenarios Audio and video distribution sites, picture sharing, large websites, and mobile applications Enterprise application and database backup, surveillance camera data, and video clippings Medical images, archives, business logs, and video clippings

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