Volume stacking model
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United States of America Patent
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Sep 30, 2003
Grant Date -
N/A
app pub date -
Nov 29, 1999
filing date -
Nov 29, 1999
priority date (Note) -
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Abstract
Systems and methods for creating and maintaining a stacked volume using one more volumes or extents of a storage subsystem is disclosed. The systems and methods define a hierarchy of operations and components that process operations. The hierarchy includes plex operations for an entire volume, mapping operations that concatenate volumes and/or extents, plex operations for a volume or extent that is a sub-component of a stacked volume. The hierarchy also includes striping operations that create and maintain storage volume stripes comprising sub-volumes and/or extents. In addition, the hierarchy includes configuration operations that operate directly on a storage volume through a hardware or software volume provider. Together, the hierarchy defined allows a flexible, extensible mechanism to build stacked volumes that provide for increase performance, fault tolerance, and/or aggregate volume size, while elimination volume combinations that can cause performance problems.
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