Atomic operation in remote storage and device for executing this

Details Atomic operation in remote storage and device for executing this Atomic operation in remote storage and device for executing this

1997-10-17

2000-10-03

Yoo, Do Hyun

Electrical computers and digital processing systems: memory

Storage accessing and control

Shared memory area

711100, 711101, 711118, 711145, 711147, 711152, G06F 1316

Patent

active

061287091

ABSTRACT:
In order to allow a plurality of remote data processing systems (1, 2) to communicate with one another by means of a storage unit (8) shared among these remote systems, each data processing system (1, 2) has the capability to reserve itself temporary exclusive access to the storage unit (8) by means of atomic operations. One particular atomic operation used is comprised of replacing a current value of a register (OPA) in the storage unit (8) with a new value communicated by the data processing system (1, 2) remote from the storage unit, it being understood that the remote data processing system knows an old value of the register (OPA) that is not necessarily equal to its current value. A device is installed in a storage controller (7, 16, 27) for the purpose of executing the atomic operation locally relative to the storage unit (8).

REFERENCES:
patent: 5325487 (1994-06-01), Au et al.
patent: 5613071 (1997-03-01), Rankin et al.
patent: 5644716 (1997-07-01), Autechaud et al.
patent: 5666546 (1997-09-01), Donnan
patent: 5835742 (1998-11-01), James et al.

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