OBS has three storage classes: OBS Standard, OBS Infrequent Access, and OBS Archive. With the three storage classes, OBS comprehensively meets customers' requirements on storage performance and cost.

  • OBS Standard features low access latency and high throughput. It is applicable to storing hot files (accessed several times per month on average), small files (< 1 MB), and frequently accessed data. The application scenarios include Big Data, mobile applications, hot videos, and social media images.
  • OBS Infrequent Access is applicable to storing less frequently accessed data (less than 12 times per year on average) with fast access response. The application scenarios include file synchronization or sharing, and enterprise-level backup. Compared with OBS Standard, OBS Infrequent Access has the same data durability, throughput, and access latency. In addition, its cost is lower than OBS Standard. However, its availability is slightly lower than OBS Standard.
  • OBS Archive is applicable to archiving infrequently accessed data (once a year on average). The application scenarios include data archive and long-term retention for backup data. OBS Archive is secure, durable, and inexpensive, which can replace tape libraries. However, it takes hours to restore data from OBS Archive for low cost.