File system capable of generating snapshots and providing fast sequential read access
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United States of America Patent
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Aug 13, 2013
Grant Date -
N/A
app pub date -
Mar 29, 2007
filing date -
Mar 29, 2007
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Abstract
An on-disk structure of a file system has the capability to generate snapshots and provide fast sequential read access to data containers, such as files. The on-disk structure arranges sequential portions of files on disk within regions, wherein each region comprises a predetermined amount of disk space represented by blocks and wherein the data of the files stored within each region may or may not be stored sequentially within the region. In addition, the on-disk structure accommodates a plurality of types of regions, including (i) active regions that contain active file system data for large files, (ii) snapshot regions that contain “copy out” snapshot data for the large files and (iii) metadata regions that contain metadata, as well as directories and small files.
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