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:
Mar. 19, 2013
Filed:
Sep. 20, 2005
Deepak Tawri, Mountain View, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
John A. Colgrove, Los Altos, CA (US);
Raghu Krishnamurthy, Santa Clara, CA (US);
Anand A. Kekre, Pune, IN;
Robert Baird, San Jose, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Deepak Tawri, Mountain View, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
John A. Colgrove, Los Altos, CA (US);
Raghu Krishnamurthy, Santa Clara, CA (US);
Anand A. Kekre, Pune, IN;
Robert Baird, San Jose, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Symantec Operating Corporation, Mountain View, CA (US);
Abstract
Applications executing on various nodes in a distributed storage environment may write data to primary storage and may also replicate the data to secondary storage via a replication target. An interval coordinator may coordinate the periodic saving of checkpoints or snapshots of the replicated data. The interval coordinator may determine the length of consistency intervals between the saving of each of the checkpoints. Writes to the replication target from each of the nodes may be associated with the current consistency interval and, in some embodiments, with a unique per-node sequence number. When transitioning between consistency intervals, each node may be configured to temporarily suspend completion of the writes and to send the replication target a consistency interval marker indicating that the node has completed all writes for the current consistency interval.