Method and system for pruned resilvering using a dirty time log

Details Method and system for pruned resilvering using a dirty time log Method and system for pruned resilvering using a dirty time log

2010-02-17

2011-11-29

Alam, Shahid (Department: 2159)

Data processing: database and file management or data structures

Data integrity

Transactional processing

C711S170000

Reexamination Certificate

active

08069156

ABSTRACT:
A computer readable medium including executable instructions for resilvering a hierarchical block tree in a storage pool. Resilvering the hierarchical block tree involves determining that a birth time of a parent block of a branch is greater than or equal to a lowest birth time on a dirty time log (DTL) and selectively traversing child indirect blocks in the branch to obtain a child data block, where each of the child indirect blocks includes a block pointer, a data checksum, and a birth time for a referenced block, where the birth time of each of the child indirect blocks is no greater than the birth time of the parent block. Resilvering the hierarchical block tree further involves resilvering the child data block when the DTL includes a birth time of the child data block, where one of the child indirect blocks includes the birth time of the child data block.

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