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:
Oct. 21, 2008
Filed:
Jun. 20, 2005
Hae-young Bae, Incheon, KR;
Jae-dong Lee, Seoul, KR;
Young-hwan OH, Cheon-An, KR;
Gyoung-bae Kim, Cheong-Ju, KR;
Myoung-keun Kim, Incheon, KR;
Soon-young Park, Incheon, KR;
Ho-seok Kim, Bucheon, KR;
Yong-il Jang, Bucheon, KR;
Hae-Young Bae, Incheon, KR;
Jae-Dong Lee, Seoul, KR;
Young-Hwan Oh, Cheon-An, KR;
Gyoung-Bae Kim, Cheong-Ju, KR;
Myoung-Keun Kim, Incheon, KR;
Soon-Young Park, Incheon, KR;
Ho-Seok Kim, Bucheon, KR;
Yong-Il Jang, Bucheon, KR;
Inha-Industry Partnership Institute, Inchon, KR;
Abstract
The present invention provides a recovery method using extendible hashing-based cluster logs in a shared-nothing spatial database cluster, which eliminates the duplication of cluster logs required for cluster recovery in a shared-nothing database cluster, so that recovery time is decreased, thus allowing the shared-nothing spatial database cluster system to continuously provide stable service. In the recovery method, if a failure occurs in a predetermined node, a second node in a group, including the node, records cluster logs in main memory on the basis of extendible hashing. If the node that has failed recovers itself using a local log, the second node in the group transmits cluster logs in packets to a recovery node that is the failed node. If the recovery node reflects the received cluster logs and maintains consistency with other nodes in the group, the recovery node resumes normal service.