Abstract: A computer-readable recording medium recording a system performance monitoring program for monitoring performance at desired timing and under desired conditions. A monitoring unit collects and stores status information indicating the operating statuses of servers in a status information memory. When other status information is necessary for evaluating performance, the monitoring unit instructs an access unit to make an appropriate access. The access from the access unit produces desired conditions and the missing status information is created. The monitoring unit collects and stores the created status information in the status information memory. When necessary status information is all stored in the status information memory, the evaluation unit reads the necessary status information to check whether the performance meets a prescribed performance criterion.

Abstract: A system analyzing apparatus analyzes a processing state of a computer system that includes a plurality of types of unit processing. The system analyzing apparatus includes a selecting unit that selects a plurality of representative unit processing based on similarities between individual units of the unit processing; and a grouping unit that groups each unit processing based on similarity between the each unit processing and each of representative unit processing selected by the selecting unit.

Abstract: A network-configuration management apparatus manages a configuration of a network in which a plurality of network devices including a plurality of servers is connected. An upper-layer-specification receiving unit receives an upper layer specification from a user. A grouping unit groups the servers based on the received upper layer specification. A configuration display unit that displays the configuration of the network based on the grouping of the servers.

Abstract: The present invention provides a network configuration change evaluation program, a network configuration change evaluation device, and a network configuration change evaluation method which can evaluate influence due to configuration change of a network.

Abstract: An analysis method for carrying out an analysis for responses of a computer system including a plurality of servers, includes: obtaining data concerning a CPU utilization ratio of each of the plurality of servers from the computer system, and storing the data concerning the CPU utilization ratio into a CPU utilization ratio storage; obtaining processing history data generated in the computer system, generating data of a request frequency by users of the computer system, and storing the processing history data into a request frequency data storage; and estimating an average delay time in each server by using the CPU utilization ratio of each server, which is stored in the CPU utilization ratio storage, and the request frequency stored in the request frequency data storage, and storing the estimated average delay time into a server delay time storage. By carrying out such a processing, the analysis can be carried out without changing the computer system to be analyzed and any additional cost.

Abstract: A service distribution device and method for balancing load distribution among servers without placing the servers in a high load or overloaded state. Models of the servers and services are generated from the record of monitored packets. Simulations are performed to predict the server load, and based on the results of the predictions, settings are determined to distribute the services among the servers so that load is balanced.

Abstract: A computer-readable recording medium recording a system performance monitoring program for monitoring performance at desired timing and under desired conditions. A monitoring unit collects and stores status information indicating the operating statuses of servers in a status information memory. When other status information is necessary for evaluating performance, the monitoring unit instructs an access unit to make an appropriate access. The access from the access unit produces desired conditions and the missing status information is created. The monitoring unit collects and stores the created status information in the status information memory. When necessary status information is all stored in the status information memory, the evaluation unit reads the necessary status information to check whether the performance meets a prescribed performance criterion.

Abstract: The communication availability information between a plurality of transmitters and a plurality of destinations before the communication state between a transmitter and a destinations in a communication network changes from available to unavailable is compared, layer by layer from an upper layer toward a lower layer, with the communication availability information after change, and destinations in paths where the communication state has changed from available to unavailable are grouped. Thus, the communication network is divided into a plurality of affected ranges and an interface of a device located at the border between the affected ranges is deduced as a fault occurrence point.

Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.

Abstract: According to this invention, it is possible to display the overall configuration of a network and, at the same time, an important part of the network in detail according to the objective of monitoring so as to be able to grasp/monitor the important part of the network in detail, while globally grasping/monitoring the network configuration, for the purpose of an efficient monitoring operation on the network configuration. A network configuration management apparatus 100 for managing the configuration of a network 101 formed by connecting a plurality of network devices comprises a topology information acquiring section 11 for acquiring topology information on each of the network devices and a degree of importance determining section 12 for computationally determining the degree of importance of each of the network devices, using the topology information acquired by the topology information acquiring section 11.

Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.

Abstract: Upon receipt of an end point list, a model setting unit requests the measurement/information collection unit to search a path. The model setting unit receives a path appliance list from the measurement/information collection unit, and generates the configuration of a simulation model of a network. The model setting unit selects an appropriate model for each component of the configuration of the simulation model. Then, the model setting unit sets the parameter value of the model based on the measurement result and the collected information received from the measurement/information collection unit, and automatically generates the simulation model of the network.

Abstract: A system analysis program which can accurately analyze the operational status of a system without modifying functions of the system for providing services. A message analysis unit analyzes the contents of collected messages, and determines the times of occurrence of the messages, the process types requested by the messages, and whether or not each of the messages is a request message or a response message. In response to an instruction for model generation, a model generation unit generates a transaction model satisfying at least one limiting condition related to caller-called relationships between processes, based on a set of messages selected in accordance with a selection criterion based on the certainty of existence of caller-called relationships. Then, in response to an instruction for analysis, an analysis unit analyzes the processing status of a transaction based on a protocol log conforming to the transaction model.

Abstract: Connections included in the topology of a lower-order layer of a plurality of layers are grouped according to device setting information of a plurality of devices composing a communication network with a communication function having a hierarchical structure composed of the plurality of layers, and an information reach range in a higher-order layer is generated. Then, the topology of the higher-order layer is generated based on the obtained information reach range.

Abstract: A source address-fabricated packet detection unit that detects a packet with a fabricated source IP address comprises a packet controller that controls the input/output of a packet and acquires a source IP address and TTL value of the input packet; a reference TTL value storage section that stores a reference TTL value that represents a normal time to live range and source address in a correspondence manner; and an address fabrication determination section that compares the TTL value of the input packet and reference TTL value corresponding to the source IP address of the input packet to determine the presence or absence of the fabrication of the source IP address in the input packet based on the comparison result.

Abstract: By providing a plurality of packet relay processing units, each of which is realized by a different CPU, for a packet relay device performing an advanced function, such as a proxy server, a fire wall and the like, which comprises a server and a network interface card connected to this server, sessions can be appropriately distributed among the plurality of packet relay processing units and simultaneously the packet relay device is controlled in such a way that packets in the same session are processed by the same packet relay processing unit.

Abstract: A TCP communications performance measuring device 2 obtains an effective bandwidth (a transfer speed) representing performance in TCP communications, wherein performance indexes or both of a round trip time and a maximum segment size which are obtained based on TCP communications variable-length packets transmitted and received pursuant to a TCP (Transmission Control Protocol) defined as protocol of a transport layer of the OSI Reference model, and any one of an average congestion window size, a packet discard rate and a packet discard event rate. The measuring device 2 therefore includes a packet monitoring unit, a performance index detecting unit 22, a session management unit 23, a session management table 24 and a performance calculating unit 25. The measuring device 2 is capable of measuring the performance in the TCP communications on a communications route of a network without specially transmitting the multiplicity of measurement-oriented packets to the network.

Abstract: A communications network control system includes a packet judging circuit 412 for judging whether a variable-length packet inputted via a network 12 is a control packet CPKT self-addressed and containing control information for network control, or a transfer packet TPKT that should be transferred to other addresses, and a control information management circuit 512 for receiving the control packet judged to be the control packet by the judging circuit via the network, and managing and processing the control information, based on the received control packet.

Abstract: A packet processing unit and a session managing unit, which are conventionally arranged in a server, are arranged in a network connecting device, and the network connecting device performs a packet relay process based on session management. As a result, the load on a server is reduced, and a process by the server is performed faster.

Abstract: In order to measure the load on a server and perform its allotment with high efficiency, the communication from a client to a server is monitored. The communication data size per connection is measured as the load on the server, the change of the communication data size per connection is detected, the maximum is recorded, and if the communication data size decreases at the time when the maximum is detected, the load on the server is judged to be heavy.