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. 06, 2004
Filed:
Aug. 31, 2000
Bernd J. W. Mathiske, Santa Clara, CA (US);
Sun Microsystems, Inc., Santa Clara, US;
Abstract
The present invention provides a method and apparatus for hybrid checkpointing which captures the entire address space of a process: both language internal and language external (native) memory and program state. Initially, the invention halts a currently active process. Next, the invention gets and records the native state of a process, including threads. Next, the invention gets and records the internal state of a process and utilizes persistent object caching. Thereafter, the invention checkpoints the process. In one embodiment, the invention builds and utilizes a catalogue. The catalogue records the native and internal states from prior checkpoints. Upon the invocation of a new checkpoint, the invention accesses the catalogue and determines what native and internal states have changed since the last checkpoint. If some of the states have changed the invention updates the catalogue and only checkpoints those changed states, thereby operating more efficiently.