Method of allowing a volume manager to release and regain reserve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 25, 2003
Grant Date -
N/A
app pub date -
Jun 30, 1998
filing date -
Jun 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a multiple machine data processing system, a volume group may be accessed by other than the original owner of the volume group and maintain integrity of the volume group. A logical volume manager on the primary machine holds all incoming I/O requests to the logical volumes in the volume group and waits for all the I/O requests already sent down to the disks in the volume group. Once all the outstanding I/O requests to the disk have been completed, the disks in the volume group are closed and reopened without reserve. The logical volume manager on a secondary machine opens the disks in the volume group without taking a reserve to allow meta-data to be refreshed on the secondary machine. When the secondary machine is finished the disks are closed. The logical volume manager on the primary machine holds all incoming I/O requests to the logical volumes in the volume group and waits for all the I/O requests already sent down to the disks in the volume group. Once all the outstanding I/O requests to the disks have been completed, the disks in the volume group are closed and reopened with reserve. The application on the primary machine does not see any of the operations and is unaffected.
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