Exclusive control system of file

Abstract

Abstract PURPOSE:To shorten an accessing time and to increase the number of processors easily by attaining the exclusive control of a common file on a disc volume for plural processors connected to a file control device. CONSTITUTION:Processors (a) constituting a roughly coupled multiprocessor system are connected to a fire control device (b) through channels and a lock command is generated from one of the processors (a) to the device (b) to obtain the permission of access to the common file on a disc volume (d) to be used by respective processors (a) in common. In this case, a processor name, a task name, a file name, and information or the like to be shunted in the processors (a) are specified in the lock command and stored in a memory of the device (b) so that the stored contents can be referred and updated by a command from the processor (a), and after completing the accesss to the common file, the processor (a) generates an unlock command.

Inventors

• 👤 Teruaki Masai
• 👤 正井　輝彰

Bibliographic Details