What is POSP? What is the system logic? POS Receipt must Read

Posproxy,pos front-facing system. Mainly used for the management of front-end POS tools and transaction forwarding, the specific function has:  1. Key and download management for POS Tools;  2. Legal detection and filtering of trading;  3. Trading monitoring and Shunt;  4. The back-Office system plays the role of security protection and firewall;  5. Concurrent control of transactions and transaction queuing;  6. Access to POS transactions and conversion of transaction messages;  7. Manages the activation and shutdown of each access direction.　　  with POSP, can expand more business, do more business distribution and channel access, such as payment, online payment, third-party business, etc., can carry on the platform of the operation of the business from the logical framework, the entire application is divided into channel layer, front-line system, post-system and public system. The channel layer interacts with the outside world to shield the difference between the external protocol and the internal Protocol; The front-line system is the daily transaction processing system, the whole system's daily operation depends on the normal operation of the system, the system failure in the front-line system will more or less affect the daily transaction processing.　　The post-line system is a system that summarizes, counts and induces the processing of frontline systems, delays the front-line system for processing, and relays the system to the front-line system as a backup system. In daily processing, the channel layer receives POS, External System, page and other initiating transaction requests, through the transaction system forwarding complete transaction processing, trading system according to the card rules, trading rules and other information to determine the transaction routing, the System account processing and External System account processing; management platform can manage various operations of the page,　　View trading and account information, conduct account and transaction control, monitor account and transaction risk. At the end of the day, the trading system initiates the daily cut, and the transaction data of the day is cut to the backup system for data cleaning and backup; The trading system notifies the account system to perform the day-to-day processing of the account system and cuts the account data to the backup system for backup. , the transaction system and the account system after the daily cut is the data cut and the necessary day-end processing, the completion of the front-end system. In theory, the day-cut process only modifies the trading time of the system and can be completed within 1 seconds, but the daily cut can be completed in 30 seconds, taking into account critical transactions and required data preparation. After the end of the frontline system, the post-line system can carry on the daily end processing of the large data volume without affecting the front-line transaction, in some special cases, the post-line system can be continuously or suspend the end-of-line processing, such as data failure recovery. After the system of data processing in accordance with the prescribed order, complete the end of the system, and feedback to the front-line system, so theoretically, the end-of-line system will only affect the front line system query system data. The front-line system and the backend system are designed to meet the financial system's 24-hour operational potential, and the Big Data processing systemBusiness function  1. Consumer transactions:  consumption, consumption, consumption cancellation, consumption cancellation rushed positive, return.   2. Pre-Authorization class transactions:  pre-authorization, pre-authorization stamping, pre-authorization revocation, pre-authorization revocation punch, pre-authorization completion, pre-authorization to complete the punch, pre-authorization to complete revocation, pre-authorization to complete the cancellation of the punch.   3. Expand Transaction:  Balance Enquiry, transfer, change, payment (telephone, water, electricity, gas, etc.).   4. Terminal Application Management:  sign-in, check-out, batch settlement, batch on-off, parameter download, echo test, POS terminal status send.   5. Monitoring and business Management:  terminal condition monitoring, transaction monitoring, merchant management, terminal management, card table management, risk control management, transaction retrieval, liquidation and reconciliation, report statistics

What is POSP? What is the system logic? POS Receipt must read