Abstract: A system for managing data availability for database transactions is disclosed. The system is programmed to receive source data and extract a plurality of events from the source data. The system is programmed to create a halt record corresponding to each event of the plurality of events. The system is programmed to resolve conflicts among one or more halt records. The system is programmed to receive a request for a specific database transaction related to a specific database item from a client device. The system is programmed to determine whether any halt record is in effect for the specific database item. The system is programmed to perform the specific database transaction in response to determining no halt record is in effect. The system is programmed to transmit a result of the specific database transaction in response to the request to the client device.

Abstract: The subject disclosure is directed towards scheduling requests using quality values that are defined for partial responses to the requests. For each request in a queue, an associated processing time is determined using a system load and/or the quality values. The associated processing time is less than or equal to a service demand, which represents an amount of time to produce a complete response.

Abstract: A system and method are provided to realize advertisement designate pushing and customers contact based on customers' network behavior, which includes a data server, advertiser devices and clients, the data server is used to match the customers' network behavior sent by the clients and the advertisement information sent by the advertiser devices and send the contact information of customers who has authorized to designate advertiser devices according to authorization behavior sent by the clients, the advertiser devices are used to designate push advertisement to customers according to the matching result of the data server manually or according to the previously determined smart pushing advertisement strategy, the clients are used to filter and display the advertisement sent by the advertiser devices and receive the customers' network behavior and authorization behavior.

Abstract: The subject disclosure is directed towards scheduling requests using quality values that are defined for partial responses to the requests. For each request in a queue, an associated processing time is determined using a system load and/or the quality values. The associated processing time is less than or equal to a service demand, which represents an amount of time to produce a complete response.