Method and system for reclaiming storage on a shared storage device or independent of the mount state of a file system
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United States of America Patent
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Feb 10, 2015
Grant Date -
Oct 25, 2012
app pub date -
Apr 22, 2011
filing date -
Apr 22, 2011
priority date (Note) -
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Abstract
A method for storage reclamation in a shared storage device. The method includes executing a distributed computer system having a plurality of file systems accessing storage on a shared storage device, and initiating a reclamation operation by using a reclamation agent that accesses the shared storage device. The method further includes reading the file system data structure that represent unallocated storage blocks of one of the plurality of file systems that will undergo a reclamation operation. A plurality of I/O resources that are used to provide I/O to the unallocated storage blocks are then interrupted. Storage from the unallocated storage blocks is then reclaimed, and normal operation of the I/O resources that are used to provide I/O to the unallocated storage blocks is resumed.
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