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. 23, 2005
Filed:
Mar. 26, 2002
Clark Lubbers, Colorado Springs, CO (US);
Susan Elkington, Colorado Springs, CO (US);
Randy Hess, Colorado Springs, CO (US);
Stephen J. Sicola, Palmer Lake, CO (US);
James Mccarty, Colorado Springs, CO (US);
Anuja Korgaonkar, Colorado Springs, CO (US);
Jason Leveille, Colorado Springs, CO (US);
Clark Lubbers, Colorado Springs, CO (US);
Susan Elkington, Colorado Springs, CO (US);
Randy Hess, Colorado Springs, CO (US);
Stephen J. Sicola, Palmer Lake, CO (US);
James McCarty, Colorado Springs, CO (US);
Anuja Korgaonkar, Colorado Springs, CO (US);
Jason Leveille, Colorado Springs, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Methods for allocating memory for logging data written by a host computer to a source virtual disk and for managing memory allocated to a data log, in a data storage system adapted to maintain redundant data storage sets at a destination location(s) are disclosed. The data storage system maintains a data log that may be activated when a destination volume is inaccessible. During the logging process the system implements an adaptive memory allocation algorithm that adjusts the log memory allocation increment as a function of the velocity of logging data written by the host computer(s). Similarly, during a merge process the system implements an adaptive memory deallocation algorithm that deallocates log memory in response to the velocity of logging data written by the host computer(s) and the velocity of merge data transmitted to the remote system. An amount of memory allocated to logging data may be compared with an amount of memory allocated to corresponding user data and, if greater, the data log terminated.