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. 26, 2010
Filed:
Nov. 23, 2005
Radha Shelat, Pune, IN;
Dilip Madhusudan Ranade, Pune, IN;
Navin Kabra, Pune, IN;
Bijayalaxmi Nanda, Orissa, IN;
Anindya Banerjee, West Bengal, IN;
Radha Shelat, Pune, IN;
Dilip Madhusudan Ranade, Pune, IN;
Navin Kabra, Pune, IN;
BijayaLaxmi Nanda, Orissa, IN;
Anindya Banerjee, West Bengal, IN;
Symantec Operating Corporation, Mountain View, CA (US);
Abstract
A system for fault tolerant multi-stage data replication with relaxed coherency comprises one or more processors and memory coupled to the processors, where the memory stores program instructions executable by the processors to implement a data replication service. In response to an update request directed at a data object, in a first stage of replication, the data replication service is configured to update respective primary replicas at a plurality of primary replica sites for the data object, and to store metadata descriptors at each of the plurality of primary replica sites. The data replication service is configured to determine whether a notification of the update is to be sent to any other replica sites. In response to identifying such other replica sites, an update notification including contents of a metadata descriptor may be sent to the other replica sites in one or more additional replication stages.