High-performance log-structured RAID
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United States of America Patent
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May 16, 2006
Grant Date -
Jun 26, 2003
app pub date -
Dec 9, 2002
filing date -
Dec 26, 2001
priority date (Note) -
Expired
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Abstract
This invention describes a high-performance, log-structured implementation of a RAID subsystem that can be efficiently implemented in software. The methods described here allow the RAID subsystem to achieve high performance without using specialized hardware such as non-volatile memory or hardware XOR/DMA engines. Furthermore, the RAID implementation described here is well suited for supporting many functions required for advanced storage virtualization such as virtual disks, graceful addition and removal of disks, tolerating multi-disk failures, and snapshots.
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