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:
Jul. 14, 1992
Filed:
Apr. 16, 1990
Alexander H Frey, Jr, Pasadena, CA (US);
Richard C Mosteller, Sierra Madre, CA (US);
International Business Machines Corporaiton, Armonk, NY (US);
Abstract
This is method for parity protecting distributed data files in a multi-node, parallel data processing network, with each node having a data store. Each data file is organized as a series of fixed size file data blocks, each file data block being comprised of a block identifier and a plurality of data bit positions. The method comprises: distributing at least N-1 file data blocks across N-1 nodes, each of the N-1 file data blocks being stored in a data store at an available physical location, which physical location may be selected from any within an area of the data store reserved for file data blocks, each data store having an associated directory indicating where each file data block is located; exclusive OR'ing data bits in corresponding bit positions in each of the N-1 file data blocks; and storing the Exclusive OR results in corresponding bit positions of a parity file data block in a data store in node N.
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