Circular and bi-directional mirroring of flexible volumes

Details Circular and bi-directional mirroring of flexible volumes Circular and bi-directional mirroring of flexible volumes

2005-10-31

2008-12-16

Alam, Hosain T (Department: 2166)

Data processing: database and file management or data structures

Database design

Data structure types

C711S113000

Reexamination Certificate

active

07467169

ABSTRACT:
A method and system mirror flexible volumes in a circular or bi-directional configuration, without creating a deadlock. A source filer maintains a number of log files on a destination filer, where the number of log files is greater than or equal to the number of cache flush operations the primary filer performs between cache flush operations on the destination filer. The source filer can create the log files in advance. Alternatively or in addition, the source filer can create the log files as needed, i.e., the source filer can create a log file when the source filer flushes its cache. Once the destination filer flushes its cache, the log files created prior to the destination filer cache flush can be deallocated or reused.

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