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:
Aug. 01, 2006
Filed:
Apr. 29, 2003
Rajagopal Ananthanarayanan, Milpitas, CA (US);
Ralph A. Becker-szendy, Los Gatos, CA (US);
Robert M. Rees, Los Gatos, CA (US);
Randal C. Burns, Washington, DC (US);
Darrell D. E. Long, Soquel, CA (US);
Jujjuri Venkateswararao, Beaverton, OR (US);
David M. Wolfe, Portland, OR (US);
Jason C. Young, Portland, OR (US);
Rajagopal Ananthanarayanan, Milpitas, CA (US);
Ralph A. Becker-Szendy, Los Gatos, CA (US);
Robert M. Rees, Los Gatos, CA (US);
Randal C. Burns, Washington, DC (US);
Darrell D. E. Long, Soquel, CA (US);
Jujjuri Venkateswararao, Beaverton, OR (US);
David M. Wolfe, Portland, OR (US);
Jason C. Young, Portland, OR (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Various copy-on-write implementations for a computing environment are presented. One copy-on-write implementation includes employing a read mapping table to perform a first virtual block to physical block mapping for use in reading a block of data of a file to be copy-on-written from physical storage for modification; and employing a different, write mapping table to perform a second virtual block to physical block mapping for use in writing a modified block of the file data to physical storage, wherein copy-on-write of the block of data is achieved using a single write operation. In another implementation, a distributed copy-on-write of a file for a client server environment is presented. This distributed copy-on-write includes performing, by a first client, copy-on-write of at least one block of data of the file to be copy-on-written, and performing, by a second client, copy-on-write of at least one other block of data of the file, wherein multiple clients perform the copy-on-write of the file.