Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-03-20
2007-03-20
Shah, Sanjiv (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C718S105000
Reexamination Certificate
active
10909511
ABSTRACT:
A disk volume access controlling method includes the steps of setting a threshold number of times of accesses from a computer to a predetermined disk volume per time unit, acquiring a number of times of accesses to the predetermined disk volume per time unit, seeking whether or not the number of times of accesses acquired exceeds the threshold number of times, creating a mirror volume for the predetermined disk volume in case that the number of times of accesses acquired exceeds the threshold number of times, and changing an access pass between the computer and the predetermined disk volume to another access pass between the computer and the newly created mirror volume. It then becomes possible to distribute accesses to a certain disk volume, and further to make the accesses to a plurality of volumes even.
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Chen, Ming-Syan, et al., Using Rotational Mirrored Declustering for Replica Placement in a Disk-Array-Based Video Server, ACM.
Itaya Takashi
Kawamura Nobuo
Nakanishi Yoshifumi
Antonelli, Terry Stout and Kraus, LLP.
Golden James R.
Hitachi , Ltd.
Shah Sanjiv
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