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Synchronous-To-Asynchronous Conversion Buffer and Application

IP.com Disclosure Number: IPCOM000062064D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Kim, MY Matick, RE [+details]

Abstract

In large, tightly coupled multiprocessor systems, typically a very large amount of main memory is shared. This amount can be many megabytes. Whenever there is an imminent system failure, it is necessary to save this shared memory and restore it later. However, the amount of time available is crucial and the amount to be saved is large. Any attempt to save this by serial storage on a single disk is too time consuming. It would be desirable to be able to store the information on disks accessed in parallel. However, each disk must work asynchronously with respect to the others while memory words are read synchronously. This presents a serious difficulty in maintaining logical consistency as well as in timing (clocking) such an operation. A desirable type of function is shown schematically in Fig. 1.