Seagate Technology Incorporated

Craig F Cutforth

Ajaykumar Rajasekharan

Christopher J DeMattio

Caroline W Arnold

Rajaram Singaravelu

Apparatus and method for updating map structures in an object storage system. A server communicates with users of an object storage system over a network. A plurality of data storage devices are arranged into locations to store and retrieve data objects of the users. A storage controller is associated with each location to direct data object transfers between the data storage devices of the associated location and the server using an existing map structure that describes the data objects in each location. A management module is adapted to generate a new map structure, migrate at least one data object from an existing location described by the existing map structure to a new location described by the new map structure, and to distribute the new map structure to each of the storage controllers after the migration of the at least one data object.

Updating map structures in an object storage system

Apparatus and method for accelerated testing of a multi-device storage system. In some embodiments, the storage system includes a server adapted to communicate with a user device, and a plurality of data storage devices adapted to store and retrieve data objects from the user device. The server maintains a map structure that describes the data objects stored on the data storage devices. A fault injection module is adapted to induce simulated failures of selected data storage devices in relation to a time-varying failure rate distribution associated with the data storage devices that indicates an observed failure rate over a first time interval. The simulated failures are induced by the fault injection module over a second time interval shorter than the first time interval. The server operates to modify the map structure responsive to the simulated failures.

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Louisville, CO, United States of America

Craig F Cutforth