Help Center> Object Storage Service> Glossary

A-E

    • A
      API

      See application programming interface.

      application programming interface

      An application programming interface is a particular set of rules and specifications that are used for communication between software programs.

    • B
      bucket

      A container used to store objects. A bucket name must be unique.

      bucket policy

      A group of control policies that accept or reject requests to access buckets, and control the permissions of one or more users to access buckets and objects in buckets.

    • C
      CORS

      See cross-origin resource sharing.

      cross-origin resource sharing

      Cross-origin resource sharing (CORS) is a mechanism that allows many resources (such as, fonts and JavaScript) on a web page to be requested from another domain outside the domain from which the resource originated.

    K-O

      • L
        LCM

        See life cycle management.

        life cycle management

        Covers phases from creating an object to deleting the object and indicates a management means to automatically delete objects that meet specific conditions.

      • O
        object

        A basic data unit in object storage service. It consists of object data and object metadata that describes object attributes.

        Object Storage Service

        Object Storage Service (OBS), a cloud storage service, provides data storage that features easy extensibility, high security, proven reliability, and high cost efficiency. Users can manage and use objects through HTTP-based interfaces. It is applicable to large-scale data storage services.

        OBS

        See Object Storage Service.

        OBS Archive

        OBS Archive is applicable to archiving rarely-accessed (once a year) data. The application scenarios include data archive and long-term data retention for backup. OBS Archive is secure, durable, and inexpensive, which can replace tape libraries. However, it can take up to hours to restore data from OBS Archive.

        OBS Infrequent Access

        OBS Infrequent Access is applicable to storing semi-frequently accessed (less than 12 times a year) data requiring quick response. The application scenarios include file synchronization or sharing, and enterprise-level backup. It provides the same durability, access latency, and throughput as OBS Standard but at a lower price. However, OBS Infrequent Access has lower availability than OBS Standard.

        OBS Standard

        OBS Standard features low access latency and high throughput. It is applicable to storing frequently-accessed (multiple times per month) hot data or small files (less than 1 MB) requiring quick response. The application scenarios include big data, mobile applications, hot videos, and social media images.

      P-T

        • P-T
          SDK

          See software development kit.

          software development kit

          A set of software development interfaces for service management and control, device management, user management, resource management, and system maintenance. SDKs can be used to develop diversified applications.

          static website hosting

          A service mode in which users store static website files on object storage services, set buckets to the hosting mode, and visit static websites by accessing buckets in the object storage services.

        U-Z

          • U-Z
            versioning

            Records and stores the versions of objects at different times in the system to trace and manage multiple object versions, so that data of a specific version can be recovered when an anomaly occurs.