Simultaneous updates to the modification time attribute of a sha

Details Simultaneous updates to the modification time attribute of a sha Simultaneous updates to the modification time attribute of a sha

1994-06-16

1996-02-06

Black, Thomas G.

Boots, shoes, and leggings

39520018, 395477, 395800, 36424294, 3642824, 3642844, 364DIG1, 3649747, 364DIG2, G06F 1730

Patent

active

054902703

ABSTRACT:
A system and method for avoiding serialization on updating the modification time of files in a cluster system. In accordance with the method, the modification time field of a file can be accessed by multiple readers or multiple writers and each client in the cluster system can update their own copy of the modification time. Whenever a client requests to read the modification time, the copies of the modification time are reconciled. The copies of the modification times are also reconciled when a cache flush or synchronization operation forces such reconciliation. The present system and method supports the requirement (of certain operating systems such as UNIX) that an explicit user-issued command to set the modification time is accomplished by granting an exclusive-write mode for the modification field.

REFERENCES:
patent: 4234918 (1980-11-01), Chu et al.
patent: 5136691 (1992-04-01), Baror
patent: 5185878 (1993-02-01), Baror et al.
patent: 5263155 (1993-11-01), Wang
patent: 5297269 (1994-03-01), Donaldson et al.

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