The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Mar. 27, 2008
Tyler A. Akidau, Seattle, WA (US);
Aaron J. Passey, Seattle, WA (US);
Neal T. Fachan, Seattle, WA (US);
Jonathan Walton, Seattle, WA (US);
Tyler A. Akidau, Seattle, WA (US);
Aaron J. Passey, Seattle, WA (US);
Neal T. Fachan, Seattle, WA (US);
Jonathan Walton, Seattle, WA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
In general, embodiments of the invention relate to reading data from and writing data to a storage system. Specifically, embodiments of the invention relate to a read only mode for a portion of a storage system. In one embodiment, a selective read-only mode for a portion of a storage system is implemented by monitoring a condition that affects a subset of persistent storage in a storage system, by detecting the condition, by entering a read-only mode for the subset, and by enforcing a policy of processing write requests and read requests to the storage system, which includes processing the write requests without modifying user data stored on the subset and processing the read requests, including requests for user data stored on the subset.