Object Storage Service (OSS) provides the following storage classes to cover a variety of data storage scenarios from hot data storage to cold data storage: Standard, Infrequent Access (IA), Archive, and Cold Archive.
Standard
- Standard locally redundant storage (LRS)
Standard LRS uses the single-zone mechanism to distribute user data on multiple devices of different facilities in one zone. This ensures data durability and availability even if hardware failures occur.
Important Standard LRS data is stored in a specific zone. If the zone becomes unavailable, you cannot access the data. If your business requires higher availability, we recommend that you use Standard zone-redundant storage (ZRS). - Standard ZRS
Standard ZRS uses the multi-zone mechanism to distribute user data across three zones within the same region. If one zone becomes unavailable, the data that is stored in the other two zones is still accessible.
IA
- IA LRS
IA LRS uses the single-zone mechanism to distribute user data on multiple devices of different facilities in one zone. This ensures data durability and availability even if hardware failures occur.
Important IA LRS data is stored in a specific zone. If the zone becomes unavailable, you cannot access the data. If your business requires higher availability, we recommend that you use IA ZRS. - IA ZRS
IA ZRS uses the multi-zone mechanism to distribute user data across three zones within the same region. If one zone becomes unavailable, the data that is stored in the other two zones is still accessible.
Archive
Archive storage provides highly durable storage services at lower prices compared with Standard storage and IA storage. Archive objects have a minimum storage period of 60 days and a minimum billable size of 64 KB. You must restore an Archive object before you can access it. The amount of time that is required to restore an Archive object is approximately one minute. You are charged data retrieval fees. Archive storage is suitable for data that must be stored for a long period of time, such as archival data, medical images, scientific materials, and video footage.
Cold Archive
Cold Archive storage provides highly durable storage services at lower prices compared with Standard storage, IA storage, and Archive storage. Cold Archive objects have a minimum storage period of 180 days and a minimum billable size of 64 KB. You must restore an object of the Cold Archive storage class before you can access it. The amount of time that is required to restore a Cold Archive object varies based on the object size and the restoration mode. You are charged data retrieval fees when you restore Cold Archive objects. Cold Archive storage is suitable for cold data that must be stored for an ultra-long period of time, including data that must be retained for an extended period of time due to compliance requirements, raw data that is accumulated over an extended period of time in the big data and AI fields, media resources that are retained in the film and television industries, and archived videos from the online education industry.
Cold Archive storage is supported in the following regions: China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), China (Chengdu), China (Hong Kong), US (Silicon Valley), US (Virginia), Japan (Tokyo), Singapore, Australia (Sydney), Malaysia (Kuala Lumpur), Indonesia (Jakarta), Philippines (Manila), India (Mumbai), Germany (Frankfurt), UK (London), and UAE (Dubai).
Comparison of storage classes
Item | Standard LRS | Standard ZRS | IA LRS | IA ZRS | Archive | Cold Archive |
---|---|---|---|---|---|---|
Data durability | 99.999999999% (eleven 9's) | 99.9999999999% (twelve 9's) | 99.999999999% (eleven 9's) | 99.9999999999% (twelve 9's) | 99.999999999% (eleven 9's) | 99.999999999% (eleven 9's) |
Service availability | 99.99% | 99.995% | 99.00% | 99.50% | 99.00% (restored data) | 99.00% (restored data) |
Minimum billable size | N/A | N/A | 64 KB | 64 KB | 64 KB | 64 KB |
Minimum storage period | N/A | N/A | 30 days | 30 days | 60 days | 180 days |
Data retrieval fees | N/A | N/A | Based on the size of the retrieved data. Unit: GB. | Based on the size of the retrieved data. Unit: GB. | Based on the size of the restored data. Unit: GB. | Based on the size of the restored data and the data retrieval priority that is selected. Unit: GB. |
Data access | Real-time access and low latency within milliseconds. | Real-time access and low latency within milliseconds. | Real-time access and low latency within milliseconds. | Real-time access and low latency within milliseconds. | Supported after data is restored. The amount of time that is required to restore an Archive object is approximately one minute. | Supported after data is restored. The amount of time that is required to restore a Cold Archive object is determined based on the restoration priority of the object:
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Image processing | Supported | Supported | Supported | Supported | Supported after data is restored. | Supported after data is restored. |
Scenarios | Suitable for images that are used for social networking and sharing applications, and data for audio and video applications, large websites, and big data analysis. Examples: program download and mobile applications. | Suitable for storing images for social networking and sharing applications and data for audio and video applications, large websites, and big data analysis. Standard ZRS is suitable for scenarios where higher durability and availability are required. Examples: important documents of enterprises and sensitive information. | Suitable for storing data that is infrequently accessed, such as once or twice each month. Examples: hot backup data and surveillance video data. | Suitable for storing data that is infrequently accessed, such as once or twice each month. IA ZRS is suitable for scenarios where higher durability and availability are required. Examples: enterprise business data and recent medical records. | Suitable for storing data for a long period of time. Examples: archival data, medical images, scientific materials, and video footage. | Suitable for storing extremely cold data for an ultra-long period of time. Examples: data that must be retained for an extended period of time due to compliance requirements, raw data that is accumulated over an extended period of time in the big data and AI fields, media resources that are retained in the film and television industries, and archived videos from the online education industry. |