Invention Grant
- Patent Title: Continuous data protection journaling in data storage systems
- Patent Title (中): 数据存储系统中连续数据保护日志记录
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Application No.: US12173188Application Date: 2008-07-15
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Publication No.: US08554734B1Publication Date: 2013-10-08
- Inventor: Paresh Chatterjee , Narayanan Balakrishnan , Raja Jayaraman , Narayanaswami Ganapathy
- Applicant: Paresh Chatterjee , Narayanan Balakrishnan , Raja Jayaraman , Narayanaswami Ganapathy
- Applicant Address: US GA Norcross
- Assignee: American Megatrends, Inc.
- Current Assignee: American Megatrends, Inc.
- Current Assignee Address: US GA Norcross
- Agency: Meunier Carlin & Curfman, LLC
- Main IPC: G06F7/00
- IPC: G06F7/00 ; G06F17/00

Abstract:
Technologies for providing block-level continuous data protection can operate without additional external devices. I/O operations to a storage volume may be logged to a sequential journal volume. The logging can occur in parallel to the I/O operation thereby having little, or no, impact on the performance of the storage system. Previous data need not be backed up; instead only new I/O operations may be recorded in the journal or log. Snapshot events may also be recorded to the logging journal. When a volume is to be recovered, a snapshot can be mounted and I/O operations after the snapshot creation, but prior to the recovery point, can be played back onto the snapshot. Operators may be provided with a flexible mechanism for reviewing and recovering data after a data loss. Using snapshots and I/O journals, a volume can be rolled back to a desired point nearly instantaneously.
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