In a data processing system comprising a plurality of systems each including a plurality of console type typewriters for establishing communications pertaining to data processing operations between an operator and the system, the communication information which is entered into and derived from a central processing unit in each system by the console type typewriter is stored in a character buffer unit corresponding to the console type typewriter in a monitor transfer control unit, and a buffer sc…

An apparatus and method of intercomputer communications based on message broadcast with receiver selection is taught. A distributed computer system is described in which each computing element includes a hardware message filter which provides content tag recognition and selection. The overall system architecture allows software modularity and both hardware and software extensibility. The message filter can be preset or dynamically programmed, and can be operated in conjunction with a serial or p…

A system applicable to a multiprocessor system for processing communications among central processing units (CPUs) in which, when one of the CPUs has sent process requests to a plurality of the other CPUs at the same time, end-of-process requests appearing asynchronously to each other are processed. If the CPUs to which the requests are meant for have ended processing normally, ending of all the kinds of processing can be completed within a short period of time and without restoring to complicat…

In a communications network, each network node can maintain its own list of network resources in a topology database. When the state of a resource “owned” by a particular node changes, that node broadcasts a topology database update (TDU) message to adjacent nodes. Each adjacent node updates its own topology database and rebroadcasts the message. To minimize the amount of information that must be included in TDU messages when two nodes are reconnected after an outage, each node assigns flow redu…

A requesting manager sends a message to its local configuration processor requesting notice of status changes in a general or particular, resource or node. The configuration manager establishes a record in its status monitoring file containing the information from the requesting process’ message. The configuration manager receives messages: from remote configuration managers or local resource managers regarding resource status changes; and from its local network interface module regarding node c…

A monitor circuit is provided, which includes a data storage unit having dummy data stored therein, a buffer circuit connected to the output of the data storage unit, a coincidence circuit for comparing the data on the I/O bus connected between the buffer circuit and I/O units with the dummy data of the data storage unit, and a flag circuit for setting an abnormal flag responsive to the non-coincidence output from the coincidence circuit. During the I/O refresh of a PC, such an abnormal flag is …

Disclosed is a computer network node discovery system that provides a general way of discovering network elements, or nodes, connected to a computer network, and a specific algorithm for discovering nodes connected to a TCP/IP network, using the SNMP protocol available within the TCP/IP network software. Some nodes on a network, called discovery agents, can convey knowledge of the existence of other nodes on the network. The network discovery system queries these agents and obtains the informati…

Information with respect to a requested user who accessed a node and information with respect to a process activated in the node are stored in a file system. By successively tracking nodes accessed by the user, a path through which the user accessed the network is tracked. When the path of the network entered different management domains, a tracking operation is requested to nodes in the management domains. The results are collected and transferred to the requesting node.

The present invention provides a method for classifying an architecture of a computer, the computer having a plurality of processors that are interconnected to one or more memories via interconnect networks. The method classifies the architecture of the computer by evaluating the number of local communications between a memory and a processor and evaluating the number of shared communications between a processor and a plurality of memories. A range coefficient is then determined based on a ratio…

An evaluation data collecting system for an information processing system which connects plural processing nodes to each other by communication paths. The evaluation collecting system includes an I/O unit provided at each of the processing nodes so as to input an collection request of the evaluation data for a processing node at issue and other processing nodes and to output the evaluation data from the other processing nodes; a processing unit provided at each of the processing nodes so as to p…