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Object storage

Ceph’s software libraries provide client applications with direct access to the RADOS object-based storage system, and also provide a foundation for some of Ceph’s advanced features, including RADOS Block Device (RBD), RADOS Gateway (RGW), and the Ceph File System (CephFS).

RADOS Gateway (RGW)

Ceph Object Gateway is an object storage interface built on top of librados to provide applications with a RESTful gateway to Ceph Storage Clusters. Ceph Object Storage supports two interfaces:

  • S3-compatible: Provides object storage functionality with an interface that is compatible with a large subset of the Amazon S3 RESTful API.
  • Swift-compatible: Provides object storage functionality with an interface that is compatible with a large subset of the OpenStack Swift API.

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librados

The Ceph librados software libraries enable applications written in C, C++, Java, Python, PHP, and several others, to access Ceph’s object storage system using native APIs. The librados libraries provide advanced features, including:

  • partial or complete reads and writes
  • snapshots
  • atomic transactions with features like append, truncate and clone range
  • object level key-value mappings

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