35 results about "Software aging" patented technology

A method of operating a node of a computer network which uses a plurality of servers, by determining that one of the servers has degraded health due to software aging, assigning tasks to the other servers while reducing workload at the first server, rejuvenating the first server once its workload has terminated and, after rejuvenation, assigning tasks to the first server. The servers are clustered to provide service based on a single server address (TCP/IP). The node may include a gateway interface which receives the server requests and passes them on to a dispatcher at the node. Tasks are assigned in response to health-related messages sent by the servers and received by a workload monitor agent of the dispatcher.

A system and method is provided that rejuvenates a software application to reduce the effects of software aging. An active replica corresponding to a software application is identified. If rejuvenation of the software application is appropriate, a new replica is created and state information is transferred from the active replica to the new replica. In addition, client requests are redirected to the new replica. After the state data has been transferred and requests have been redirected, the active replica is terminated. Once the active replica has been terminated, the new replica becomes the active replica. When rejuvenation is again proper, another new replica is created and the state data is transferred from the new active replica to the new replica and requests are redirected to the new replica. This process repeats whenever rejuvenation of the application is needed.

A software program is configured in accordance with a software aging process such that one or more files generated by the program are at least partially encrypted using a cryptographic key associated with a current time interval for which the files are generated. The cryptographic key may be a symmetric key used for both encryption and decryption operations, such that cryptographic key used for encryption in a given interval is also required to decrypt files encrypted during that interval. Periodic updates of the software program are provided to a legitimate user of the software program, with a given one of the updates including a different cryptographic key associated with a subsequent time interval. The cryptographic key associated with a particular one of the time intervals may be common to each of a set of legitimate copies of the software program that have received the corresponding version of the periodic update. The variation of the cryptographic keys from one interval to another discourages unauthorized use of the software program by deliberately requiring both legitimate and illegitimate users to request unusually frequent updates, thereby substantially increasing the tracing and prosecution risks borne by software pirates.

Load test is executed with an appropriate frequency which does not lead to a decrease in software development efficiency and a decrease in the precision of software aging detection. Load test of a version of software under test is executed in accordance with an execution criterion, presence or absence of a software aging problem is detected by comparing a test result of the load test with a test result of load test of a previous version of the software to be compared, and frequency of execution of subsequent load test is adjusted by changing the execution criterion based on a result of the detection.

The invention relates to a system re-graduating method of group environment applied server which tests weather the current server node is aging by aging formation, if it is aging, it sets the node as testing point, ascertains the current server node condition information of the EJB by the condition replicating operation and replicates the node condition to the backup node of anther server; the server calls the local operating system Windows APIí¬í¬ExitWindowsEx to restart the server node which comes into the group after restarting and in step with the other nodes and replicates the new condition of the current backup node to the local node; the applied server accepts the EJB application.

The invention discloses a software aging prediction method and device based on multi-model comparison, and belongs to the field of software aging, and the method comprises the steps: collecting agingindexes from a target software system, and processing the aging indexes into time sequence data as the pre-input of a model; for the aging data scale, designing an aging prediction model comprising machine learning and a neural network, calculating the prediction error of each model, and selecting the model with the minimum error as a candidate model; and calculating whether significant differences exist between the model and other models, and if the differences are obvious, selecting the model as a final aging prediction model. According to the method, the problem that the prediction result of a single model may influence decision making is solved, a user can automatically select a suitable model according to aging data features and prediction errors, active maintenance measures or earlyor late execution is avoided, and the influence on software reliability is reduced. More models can be expanded, and an optimal prediction model can be selected for different aging data scales to helpsystem operation and maintenance.

The invention discloses a software aging detection method, and the software aging detection method comprises the following steps: acquiring the total usage amount of piles corresponding to test software and target software at different moments, wherein the test software simulates the operation of the target software, and the test software is injected into a memory leak hole; determining a divergence value corresponding to each moment according to a first total usage amount corresponding to the test software and a second total usage amount corresponding to the target software, wherein the divergence value is a difference amount between the first total usage amount and the second total usage amount at the same moment; when each divergence value is less than a preset threshold, judging that the target software is not aged. The invention further discloses a software aging detection device and a computer readable storage medium. According to the method, the aging of the software is accurately determined.

The invention discloses a global optimization method based on the maintenance charge and for a two-tier software aging phenomenon. The method includes the following steps that the consumed memory Xi of an application tier within the time interval and the consumed memory Yi of an operation system tier within the time interval are monitored by a monitor; a two-tier software aging analysis model is built based on the updating process; the optimum value of an alarm threshold value of the operation system tier, the optimum value of the fatigue threshold value of the operation system tier and the optimum value of the alarm threshold value of the application tier are obtained according to the two-tier software aging analysis model; and the available maximum value of a two-tier software system is obtained. By means of the method, the overall availability can be improved effectively for a regeneration strategy method of the two-tier software.

The invention discloses a cloud server aging prediction method based on time series clustering and deep learning LSTM. The method comprises the following steps of extracting performance resource timeseries data on a cloud server, wherein the performance resource time series data comprises CPU idle rate data and system available memory data; preprocessing and decomposing wavelet packets on the time series data; and carrying out K-means clustering on the preprocessed data, counting a clustering center with the highest occurrence frequency, constructing a deep learning LSTM model by utilizing aclustering result, and predicting a software aging trend according to a time sequence prediction value of the LSTM model. Wavelet packet decomposition is utilized to overcome the limitation that a traditional prediction method is relatively low in prediction accuracy of non-stationary time series data and time series data with relatively large fluctuation, so that the software aging trend can be predicted more accurately. The problem of how to regenerate the software at the optimal time point for the aging phenomenon of the cloud server software is solved.

The invention provides a virtual machine working queue and redundant queue updating method for different aging scenes, and relates to the technical field of cloud computing. The method comprises the following steps: firstly, dividing different software aging scenes according to the survival time and load fluctuation conditions of the virtual machines, and then dynamically adjusting the number andsequence of working virtual machine copies by adopting a ridge regression-based virtual machine working queue dynamic updating method; and finally, dynamically updating the redundancy queue of the virtual machine based on the binary decision diagram. According to the virtual machine working queue and redundant queue updating method for different aging scenes, the service quality and the resource cost of the virtual machine are balanced through selection and switching strategies, the service quality of the system is guaranteed, and even if the working virtual machine has service failure, the redundant virtual machine can be switched in a short time to completely replace the service failure virtual machine.

The invention discloses a cross-project software aging prediction method, which comprises the following steps of: preprocessing data in a source project and a target project, reducing edge distribution and condition distribution difference by adopting joint distribution domain adaptation, and relieving a class imbalance problem by adopting an undersampling method and an improved subclass discriminant analysis method; and finally, using a machine learning classifier (logistic regression and the like) to perform prediction. According to the method, the condition distribution difference between the source project and the target project of the software aging defect data set is considered, and an improved subclass discriminant analysis method and the like are further adopted to relieve the extremely serious class imbalance problem. The problem that a traditional cross-project software aging defect prediction method is not high in precision and robustness is solved, developers are helped tofind and remove software aging related defects in the development test stage, and losses caused by the software aging problem are avoided. The feasibility of the method is verified on real software, and the method can be popularized to other software to predict software aging related defects.

The invention provides a method for predicting different types of business concurrency of a virtual machine, and relates to the technical field of cloud computing. A method for predicting different types of business concurrency of a virtual machine comprises the following steps: firstly, acquiring historical business concurrency of the virtual machine, preprocessing the historical business concurrency, and then judging the type of the virtual machine service concurrency based on improved 1 nearest neighbor-dynamic time adjustment method 1NN-DTW; and finally fitting the business concurrency without periodical change by adopting a classification regression tree. Fitting business concurrency with periodic change by adopting Fourier series FS and a classification regression tree CART; according to the method for predicting the concurrency of different types of services of the virtual machine, the concurrency of each service of the virtual machine is predicted, a basis can be provided for the next step of increase or decrease of the virtual machine, and meanwhile, the software aging condition of the virtual machine can be accurately estimated, so that the purpose of improving the performance and reliability of the working virtual machine is achieved.

The invention discloses a passage logic software aging test platform comprising multiple supports, an annular transmission mechanism, simulation mechanisms and a detection mechanism. A transmission belt is used as the annular transmission mechanism. Ticket cards and paperboards simulating passengers are fixed on the transmission belt. The condition of passage through a channel of the passengers is simulated by rotation of the transmission belt. Various passage conditions are simulated by the number and the position of the ticket cards and the paperboards. Different passage speed is simulated by a speed adjustable motor. The platform is fixed on the aluminum section supports, and the bottom part is provided with truckles so that movement is convenient. The whole passage logic software aging test platform has advantages of being simple in structure, low in cost and stable and reliable in working.

The invention discloses a cloud server resource performance prediction method using an ARIMA-RNN combined model, and the method comprises the steps: firstly carrying out the preprocessing of sequencedata, and enabling the original sequence data to be mapped to [-1, 1]; determining an ARIMA model, and then training, predicting and storing existing data; determining an RNN model structure, and training the RNN model by using the existing data and the prediction result of the ARIMA model on the existing data; and inputting the prediction result of the ARIMA model for the moment t data and the data of the moments t1, t2,..., tn into the RNN model to predict the data of the moment t. According to the method, the limitation that the ARIMA model is relatively low in prediction precision for datawith relatively large fluctuation is overcome, the problems of low convergence rate and instability of the RNN model are solved, finally, prediction and analysis of performance parameters of the cloud server system are realized, and the software aging phenomenon is predicted more accurately.

The invention discloses an in-project software aging prediction method based on Active Learning, and the method comprises the steps: collecting the static measurement of a code in software, selectinga sample through Active Learning, carrying out the labeling of the sample, taking the sample as a training set, and predicting the remaining samples without class labels; and adopting active Learningfor sample selection and manual labeling, and forming a training set. An oversampling and undersampling combined method is adopted to relieve the class imbalance problem, and a machine learning classifier is used for prediction. According to the method, few software aging defect data set samples are considered, time and labor are consumed for collection, the problem of polar imbalance is relievedby adopting an undersampling and oversampling combined method, developers are helped to discover and remove software aging related defects in the development and test stage, and losses caused by the software aging problem are avoided. The feasibility of the method is verified on real software, and the method can be popularized to other software to predict software aging related defects.

The invention discloses a method for predicting the resource performance of a cloud server based on an LSTM-ACO model. The method comprises the steps of firstly carrying out the preprocessing of time sequence data, and mapping original sequence data to a [0, 1] interval; then determining an LSTM model, training and predicting existing data, and optimizing the LSTM model by using an ant colony algorithm; and finally, inputting the prediction result of the LSTM model for the data of the moment t and the data of the moments t-1, t-2,..., t-n into the LSTM-ACO model, and predicting the data of the moment t. According to the method for predicting the resource performance of the cloud server based on the LSTM-ACO model, the problem that a traditional prediction method is not high in precision in the prediction process is solved, the LSTM parameters are optimized through ACO, the problem that the model is caught in a local optimal solution is avoided, and the prediction convergence speed is increased; and finally, cloud server resource and performance prediction is realized, and the software aging phenomenon is predicted more accurately.

The invention discloses a method for predicting cloud server software aging based on an EGGM model. The method comprises the following steps: firstly, decomposing cloud server performance index data through EEMD to obtain a plurality of groups of IMF components and Residual components with high and low frequencies, then predicting the high-frequency IMF components by using a GA-GRU model formed by GA optimization GRU network hyper-parameters, predicting the low-frequency IMF components and Residual components by using an MLR model, and finally superposing and reconstructing the obtained component prediction results to obtain a complete prediction result. The problems that a traditional method is prone to falling into a local optimal solution in the prediction process, and the prediction precision is too low are solved; according to the method, the fluctuation change characteristics of cloud server software aging data can be accurately extracted, the local characteristics of cloud server performance index data can be accurately predicted, and finally high-precision prediction and analysis of cloud server software aging performance index parameters are realized.