805 results about "Load testing" patented technology

A method and system using one or more load cells coordinates load testing of one or more sites under test over a network such as the Internet in accordance with one or more load test requests. In one embodiment, such method and system facilitates an economic, efficient, and accurate evaluation of the capacity of the SUTs to support concurrent users of the SUTs. A load test request is received from a User and provides information concerning a load test to be performed on a site under test (SUT). A load test is generated, and the load test is allocated to one or more load cells. The load cells perform the load test by sending load test data to the SUT and receiving responses from the SUT. Portions of a load test may be allocated to different load cells, which may be geographically remote from the SUT and/or geographically diverse. Multiple concurrent pending load tests may be processed for the same SUT. A load cell may concurrently perform all or a portion of multiple different load tests for multiple different SUT's simultaneously. A reporting function generates a report based on the responses received from the SUT. The reporting function may in addition or alternatively allow the User to view real-time results during load test execution.

A system for load test monitoring a computer system is provided. The system includes a transaction generator to provide transactions to servers to load test the servers. The system includes one or more agents provided on the servers, the agents operable to obtain server statistics from servers during load testing. The system also includes a display including a plurality of gauges. Each gauge depicts transactions statistics based on the transactions generated by the transaction generator for each server and further depicts server statistics for each server as obtained by the agents. Based on the displayed transaction and server statistics the transaction generator is adjustable to optimize the load test of the servers.

A method is disclosed that preparing a discrete event simulation model of a production network is provided including a client and a plurality of servers connected by a network comprising the steps of initiating a single business function trace test on the production network; gathering network from trace data from the network; deriving a transaction summary from the network flow trace data; initiating a single business function load test on the production network; gathering resource data from the plurality of servers; normalizing the resource data; gathering web log data from at least one server from the plurality of servers; calculating a number of business functions running on the production network; calculating a consumption of resources used by the plurality of servers; calculating a business function cost associated with the consumption of resources; creating a business function profile from the transaction summary and the business function cost; and building a discrete event simulation model from the business function profile.

The invention relates to a micro material mechanical performance testing platform under stretching-bending-twisting multi-loads, and belongs to the field of electromechanics. The micro material mechanical performance testing platform comprises a tension and compression module, a bending module, a twisting module, a detection control module and a test-piece clamping module, wherein the testing platform takes the tension and compression module as a basic function module; the twisting module is arranged at one end of the tension and compression module; the test-piece clamping module is arranged on the tension and compression module; the bending module is independently arranged at one side of a portal frame. The micro material mechanical performance testing platform can be taken as a material mechanical performance test device with an independent stretching/compressing mode or an independent bending mode or independent twisting mode, namely a single load testing mode, and can be applied to a material mechanical performance test of a twisting load under the given stretching/compressing stress level or a material mechanical performance test of a bending load under the given stretching/compressing stress level, namely a composite load testing mode. The stress strain process of a material under the effect of a composite load can be detected by the collection of a load/displacement signal by using the detection control module.

Systems and methodologies are provided for load testing a server wherein user characteristics are adjusted dynamically during the testing period of the server, based upon weightings defined in a user profile. Such dynamic adjustment enables a distribution of user characteristics as a percentage of total requests, (e.g. a per iteration model). The user characteristics can include type of user activities on a web page (e.g. search, browse, check out), browser features (e.g. browser type, browser version) net work connections, various client/server hard ware/software configurations and the like.

A method and apparatus is provided for rapidly and safely estimating the high-rate load test voltage of a storage battery utilizing open-circuit voltage, temperature and a dynamic parameter such as conductance or resistance. An output indicative of the condition of the battery is provided as a function of the estimated load test voltage of the battery compared to industry standards without the necessity to charge the battery or discharge the battery with high-rate loads using bulky load testing equipment.

An improved system and method for load testing software applications is provided. The user interface and/or application calls are captured to generate a script to emulate a user session. The script may include source language statements and, with or without editing, may be compiled into an executable script. Multiple scripts may be executed on a script driver to simulate multiple users to load test a system.

Described herein are systems and methods for website or web based application monitoring and load testing. A server is configured to execute monitoring or load testing agents on various agent devices that are placed in various locations across a network. The agents receive a playback script from the server and execute the script to simulate a user session that is part of a website monitoring or load testing project. Execution of the playback script may cause the agent to send commands to a generic browser application that in turn carries out those commands. Alternatively, or in combination, execution of the script may cause the agent to simulate operating system commands such as mouse, keyboard, and voice commands. The results of the script execution by the agent are stored and sent back to the server for potential real time alerting notification and compilation into a related report. Methods for recording the playback scripts are also provided.

A computer-based method for load testing a web application. The computer-based method comprises selecting one or more uniform resource locator (URL) parameters, identifying the selected parameters by parameter type, and loading the web application with URLs created by randomly generating the selected URL parameters. An electronic system adapted to load test a web application utilizing random parameter generation.

The invention discloses a concurrent connections performance testing system and a concurrent connections performance testing method for a file system. A master control node and at least one testing node are arranged, wherein the testing node is arranged on an application server of a storage system, is mainly used for simulating an application load to test a tested system, is connected with the tested file system through a storage network, and is used for testing the tested system; and the master control node performs centralized management which comprises process scheduling and task management on the testing node through a local area network, and is used for performing centralized management on all testing nodes and counting a test result. The system comprises a parameter processing module, a tested system information collecting module, a system initialization module, a condition monitoring module, a distributed management module, a load testing module, a result counting and reporting module and a system recovery module, solves the problems that the concurrent connections of the file system are not definitely defined and a detailed and useable testing method is lacked in the prior art, and is particularly suitable for the concurrent connections performance test of a distributed file system.

In various exemplary embodiments, a method of monitoring performance of a server and a related computer-readable medium include one or more of the following: placing a load agent on at least one server; maintaining a load on the server using the load agent, wherein the load corresponds to at least one predetermined performance parameter of the server; monitoring the at least one predetermined performance parameter on the server; and gathering performance information while the load agent is monitoring the server. In various exemplary embodiments, the performance parameters include CPU usage, memory usage, network load, and disk performance. Thus, various exemplary embodiments enable a precise determination of the effect on application requests received by the server when the server is under a specific load.

The invention discloses an intelligent power grid load testing and recognition method based on steady state and transient state characteristic joint matching. A typical intelligent power grid load is selected to conduct the data collection and feature analysis, and a load characteristic data base is established; user power consumption data are obtained through an intelligent electric meter in an intelligent power grid end-user circuit breaker layer; a collection data line is preprocessed, and power utilization switch events are detected; the switch events are conducted with clustering by utilizing clustering algorithm, and each cluster corresponds to a kind of start-stop behavior of an electricity load; the clustered switch events are conducted with load recognition; a recognition result is conducted with result checking by utilizing steady state harmonic current feature analysis, and the recognition result is updated. The intelligent power grid load testing and recognition method based on the steady state and transient state characteristic joint matching can detect the type and the service condition of load equipment on the basis that the normal operation of an intelligent power grid and normal use for a user are not affected, not only contributes to the load side management of the intelligent power grid, but also is beneficial to strengthening demand side management and has great significance for achieving optimizing configuration of electric power resources and the load.

The invention discloses a static force load testing device for a concrete beam. The device comprises a base (1), a crossbeam (2), and an upright post (3) provided with an external thread, wherein the upright post (3) is respectively fixedly connected with the base (1) and the crossbeam (2) in a manner of screw-thread fit; a hydraulic jack (6), a load transducer (8) and a load allocation beam (7) are sequentially mounted on the bottom surface of the crossbeam (2); first spherical hinges (10) used for transmitting load to the concrete beam (19) are respectively arranged at the two ends of the bottom surface of the load allocation beam (7); an adjusting hole (5) is formed in the top of the base (1); the base (1) is fixedly connected with a support seat (9) used for supporting the concrete beam (19) through the adjusting hole (5); a second spherical hinge (11) is arranged at the top of the support seat (9); a linear displacement sensor used for detecting the deformation of the concrete beam (19) is mounted on the base (1); the hydraulic jack (6) is used for applying the load to the concrete beam (19), and a computer (16) is used for analyzing and processing acquired signals so as to monitor the test process; the crossbeam (2) and the support seat (9) are regulated to adapt to load tests of concrete beams of different sizes; the overall device can be dismounted and mounted, and is convenient to store and transport.

The invention discloses a device for testing composite asphalt pavement interlayer shear fatigue, and a method thereof. According to the present invention, a skew shearing experiment is adopted to determine the composite asphalt pavement interlayer shear fatigue lives under different temperature conditions. The device comprises a loading bar, a load testing system, a pressing block, a supporting block and a support platform, wherein the pressing block and the supporting block are provided with a concave part, when the loading rod loads, a specimen requiring test is positioned in a space formed by docking of the two concave parts. The testing method is: placing the specimen in the supporting block and the pressing block, loading on the specimen through a testing machine to generate the skew shearing failure to obtain the maximum failure load, and carrying out the shear fatigue experiment under the repeated load effect according to 0.2-0.8 times the maximum failure load. The device and the method are simple and easy to operate, the actual stress state of the composite asphalt pavement can be accurately simulated, and the important significances are provided for the designs and the evaluations of the composite asphalt pavement interlayer shear property and the interlayer structure and material, and the design of the asphalt layer thickness.

The invention discloses a transmission system load signal testing, analyzing and processing method of a wheel-type loader; the transmission system load signal testing of the wheel-type loader is completed by a transmission system load signal testing module; a signal acquisition device and a recorder which are mutually connected form the transmission system load signal testing module; load signal analysis and processing are completed by a load signal analyzing and processing module, and the load signal analyzing and processing module analyzes and processes the load signal recorded by the recorder; the method solves the problems of transmission system load on-line actual measurement and load testing signal processing of the wheel-type loader, reduces the interference of pseudo-signals with load spectrum generation as possible, realizes the truth of the transmission system load spectrum, uses the transmission system load spectrum in the virtual test of the power performance optimization design of the wheel-type loader so that the precision is close to the real working environment of the loader, greatly shortens the performance testing time of the wheel-type loader, and improves the optimization design precision.

The invention discloses a fast load testing device and method for a chloride ion migration coefficient of concrete. An elastic connecting piece in a state of compression is adopted for exerting a sustained load on a concrete sample and the concrete sample loaded with sustained stress is subjected to an electric accelerating chloride ion migration test to calculate the chloride ion migration coefficient of the concrete sample in the state. According to the invention, the fast load testing device and method for the chloride ion migration coefficient of the concrete aim at the problems that the conventional testing device for the chloride ion migration of the concrete can not exert a load on a tested sample and consequently can neither imitate the actual loaded state of in-service concrete nor determine the chloride ion migration coefficient of the concrete under sustained load; sustained and stable pressure is exerted on the concrete sample in longitudinal direction by the resilience of the elastic connecting piece; and the reduction of pressure stress caused by the creep of the concrete sample when a tensioning screw is used for exerting load can be avoided, so that the influence of the sustained load on the permeability of the chloride ions of the concrete can be researched.

The invention discloses a design of an instrumented indenter. A driving and load testing system adopts a design that a voice-coil linear motor is connected in series with a load sensor and an indenting head subassembly; an indenting-in-sample depth testing system for a diamond indenting head adopts a design that three probe type capacitor displacement sensors are combined with a depth measuring follow-up disc; a computer control system is designed to have an open-loop working mode and a closed-loop working mode according to different test progresses, and can control the voice-coil motor, so as to control the diamond indenting head to carry out tests of indenting loading, load keeping, unloading and the like on the surface of a sample; and simultaneously, the relationship of an indenting load, an indenting depth and time can be obtained. By using the design, the influence on the measurement of an indenting-in-sample depth of the indenting head as the surface of the sample generates small-angle inclination with respect to a horizontal plane and the surface of the sample generates transitional displacement along a vertical direction due to a supporting factor or a clamping factor in a process that the sample is indented is eliminated; simultaneously, the influence of the flexibility of a frame on the measurement of the indenting-in-sample depth of the indenting head is also eliminated; and the precision of the indenting-in-sample depth of a testing indenting head is guaranteed.

A protocol sleuthing system according to the present invention for load testing a network server includes a computer configured to interconnect with the network server, a protocol engine stored in and implemented by the computer and operative to generate a plurality of synthetic users, to generate a synthetic transaction in accordance with a specified protocol, and to cause each of the plurality of synthetic users to sequentially implement a plurality of the synthetic transactions with the network sever for load testing thereof, a configuration file connected to the protocol engine that includes variables required to generate the synthetic transaction, information that defines the behavior of the plurality of synthetic users implementing the synthetic transaction, and information that defines the number of synthetic users to be created by the protocol engine, and a module that is operative to monitor each of the plurality of synthetic transactions implemented by each of the plurality of synthetic users with the network server, to detect any error event occurring during any of the plurality of synthetic transactions implemented by any of the plurality of synthetic users, and to report any error event detected during such network testing.

The invention provides a testing system for loads of frequency converters, which comprises a power supply transformer, at least one testing module and a controller. The power supply transformer outputs at least one power supply voltage, each testing module comprises at least one frequency converter to be measured and a load testing cabinet, each load testing cabinet is used as a variable load to adjust output of the corresponding frequency converter to be measured and outputs corresponding alternating-current voltage to an output end of the power supply transformer, the controller controls the magnitude of the load testing cabinet of each testing module when the load testing cabinet is used as the variable load, and accordingly the output of the frequency converters to be measured is adjusted by the aid of the load testing cabinets. A three-phase reactor is directly disposed at an output end of each frequency converter to be measured so as to realize filtering processing, and accordingly a running mode of each frequency converter with a motor load is simulated. In addition, the frequency converters with different voltage grades can be loaded and tested under the condition without the motors, residual electric energy is fed back to the output end of the power supply transformer to be recycled, and accordingly energy is saved.

A tri-axial bending load testing jig includes a die including first and second supporting axes which upholds opposite sides of a board material, the first and the second supporting axes movable so that an interval therebetween can be adjusted according to a size of the board material, a punch mounted at an upper part of the die movable in a vertical direction to press down a center portion of the board material, a punch setting unit formed in the center of the die to set the center and parallelism of the punch with respect to the first and the second supporting axes and having a punch groove for receiving the punch at the center portion of the die, and a material positioning unit guiding a position of the board material to be put on the first and the second supporting axes, according to the size of the board material.

In a load testing system, a transmission device measures a bandwidth of user data transmitted from a user terminal in real time, calculates a calculation bandwidth by subtracting the bandwidth of the user data from an evaluation bandwidth preset to evaluate the performance of a network, and transmits test data corresponding to the calculation bandwidth with the user data corresponding to the bandwidth of the user data. A reception device receives the user data and the test data transmitted with the user data, and evaluates the performance of the network based on the user data and test data.