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:
Jan. 04, 2000
Filed:
Aug. 21, 1997
Dataxel Corporation, Menlo Park, CA (US);
Abstract
Local transactions are run at replication sites while receiving and tracking replication packages from primary sites. If a package coming in from a primary site updates data that a local transaction used, the data is considered stale and the local transaction is restarted. When the replication site wishes to commit (e.g., update data at the primary sites), a special dummy marker is submitted and committed. The marker comprises a dummy transaction that updates a piece of data at the primary site private to the replication site. The local site waits for the dummy transaction in the stream of replication packages sent from the primary site. Once the dummy transaction is received, the replication site is assured that any subsequent replication packages from the primary site will not affect the local transaction. If the replication packages received before the marker do not affect data items referenced during the local transaction, the local transaction commits.