Electrical computers and digital processing systems: memory – Storage accessing and control – Memory configuring
Reexamination Certificate
2005-08-23
2005-08-23
Chace, Christian P. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Memory configuring
C714S006130, C714S019000
Reexamination Certificate
active
06934826
ABSTRACT:
Methods for allocating memory for logging data written by a host computer to a source virtual disk and for managing memory allocated to a data log, in a data storage system adapted to maintain redundant data storage sets at a destination location(s) are disclosed. The data storage system maintains a data log that may be activated when a destination volume is inaccessible. During the logging process the system implements an adaptive memory allocation algorithm that adjusts the log memory allocation increment as a function of the velocity of logging data written by the host computer(s). Similarly, during a merge process the system implements an adaptive memory deallocation algorithm that deallocates log memory in response to the velocity of logging data written by the host computer(s) and the velocity of merge data transmitted to the remote system. An amount of memory allocated to logging data may be compared with an amount of memory allocated to corresponding user data and, if greater, the data log terminated.
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Elkington Susan
Hess Randy
Korgaonkar Anuja
Leveille Jason
Lubbers Clark
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