The Object Storage Service is a highly scalable and durable multi-tenant object storage system for large amounts of unstructured data at low cost through a RESTful http API. It includes the following components: Proxy Servers (swift-proxy-server). Accepts Object Storage API and raw HTTP requests to upload files, modify metadata, and create containers. It also serves file or container listings to web browsers. To improve performance, the proxy server can use an optional cache usually deployed with memcache. Account servers (swift-account-server). Manage accounts defined with the Object Storage Service. Container servers (swift-container-server). Manage a mapping of containers, or folders, within the Object Storage Service. Object servers (swift-object-server). Manage actual objects, such as files, on the storage nodes. A number of periodic processes. Performs housekeeping tasks on the large data store. The replication services ensure consistency and availability through the cluster. Other periodic processes include auditors, updaters, and reapers. Configurable WSGI middleware, which is usually the Identity Service, handles authentication.