OBS has the following storage classes: Standard, Warm, and Cold. In such a manner, OBS meets customers' requirements on storage performance and costs.
- OBS Standard features low access latency and high throughput. It is applicable to storing frequently accessed (multiple times per month) hot or small files (< 1 MB) that require quick response. The application scenarios include big data, mobile applications, hot videos, and social media images.
- OBS Warm is applicable to storing semi-frequently accessed (less than 12 times a year) data that requires quick response. The application scenarios include file synchronization, file sharing, and enterprise-level backup. It provides the same durability, access latency, and throughput as OBS Standard but at a lower price. However, OBS Warm has lower availability than OBS Standard.
- OBS Cold is applicable to archiving rarely accessed (once a year) data. The application scenarios include data archiving and long-term data retention for backup. Cold is secure, durable, and inexpensive, which can replace tape libraries. However, it can take up to hours to restore data from OBS Cold.