Incremental disk backup
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 1998
Grant Date -
N/A
app pub date -
Mar 22, 1996
filing date -
Mar 30, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Each node of a distributed (multi-node) data processing system, which includes a plurality of shared data storage disks, has a respective incremental backup bit-file containing one bit for each datablock of the shared disks. The bits are initially set to logical 0. When a node writes data to a datablock the respective bit is reset to logical 1. Upon an incremental backup requirement, one node reads all of the bit-files, forms the logical OR thereof and forms a respective new bit-file. The blocks whose bits equal 1 in this new bit-file are then backed up. The bit-files are stored in the node main memories for quick access and will be lost upon node failure. However if a redo log is maintained, bit-files can be reconstructed.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully