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:
Apr. 30, 2013
Filed:
Aug. 18, 2010
Mark G. Hayden, Gardnerville, NV (US);
Lawrence Michael Ruane, Parker, CO (US);
Mark G. Hayden, Gardnerville, NV (US);
Lawrence Michael Ruane, Parker, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
One embodiment of the present invention is directed to a multi-node data-storage system comprising a number C of component-data-storage-system nodes that store data pages of a data object in a mirror and in 0, 1, or more parity-encoded snapshots, the mirror comprising 2 or more replicates including a 0replicate and each parity-encoded snapshot containing 1 or more stripes, each stripe including snapshot data pages and snapshot parity pages. The multi-node data-storage system features a snapshot operation that generates a next parity-encoded snapshot and transfers data pages of the data object from the mirror to the next-generated parity-encoded snapshot, the snapshot operation distributing each snapshot data page to the node that contained the corresponding 0-replicate data page, distributing successive snapshot data pages to successive nodes in a cyclic order with respect to the C nodes, and distributing snapshot data and parity pages to the C nodes so that the data and parity pages of each stripe reside on different nodes and so that the data and parity pages are evenly balanced among the C nodes following distribution of a threshold number of snapshot pages.