Data processing: database and file management or data structures – File or database maintenance – Database backup
Reexamination Certificate
2011-04-12
2011-04-12
Cottingham, John R. (Department: 2167)
Data processing: database and file management or data structures
File or database maintenance
Database backup
C707S704000
Reexamination Certificate
active
07925631
ABSTRACT:
A process such as a snapshot creation application process freezes a file system upon initiating a process to create a snapshot of a file system or a part thereof. Upon freezing the file system, the snapshot application process causes a second process to make a change to the file system. If the change is successfully made before the snapshot creation application process tries to thaw the file system, the second process sends a signal back to the snapshot application. Upon receiving a signal from the second process, the snapshot creation application process outputs a warning to a user that the snapshot is inconsistent. The snapshot application also causes a third process to automatically thaw the file system, if a certain period of time has passed and the third process has not received a signal from the snapshot application process indicating the snapshot has been successfully created.
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Nasre Rupesh
Thillai Kumaravel
Vishwanath Aditya
Blakely , Sokoloff, Taylor & Zafman LLP
Cottingham John R.
Network Appliance Inc.
Richardson James E
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