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Automatic Synchronization of Multiple Mapped Segments

IP.com Disclosure Number: IPCOM000062556D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Duvall, KE Hooten, AD O'Quin, JC [+details]

Abstract

By modifying the Copy-on-Write function, synchronization of a common access file on a triggered basis (automatic synchronization) is achieved. It would be desirable to automatically synchronize Copy-on-Write for common files in a UNIX* environment. By modifying the Copy-on- Write function in the following manner, synchronization of common access files on a triggered basis (automatic synchronization) has been achieved. A system parameter is set at initialization time to define the trigger granularity in Hertz. A flag is set in the information node (i-node) structure in the SHMAT system call, indicating that autosync is enabled. When the autosync function is enabled by any single user, the autosync function is transparent to all users. The autosync function works as follows: 1.