Multiple concurrent active file systems
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United States of America Patent
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Jun 14, 2011
Grant Date -
Jun 3, 2010
app pub date -
Feb 2, 2010
filing date -
Jun 7, 2002
priority date (Note) -
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Abstract
A method and apparatus for operating a data storage system is disclosed. An original active file system holds incoming write transactions. Data is written at a selected time to blocks in a data storage device of the original active file system, the data written to blocks which do not hold old data of the data storage system. Pointers to data of the original active file system are written at the selected time to the data storage device, the pointers written to blocks which do not hold old data of the data storage system, the pointers and a previously saved data of the active file system forming a consistency point of the original active file system at the selected time. A new active file system is started using the consistency point of the original active file system at the selected time.
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