adp connection

What is a long connection?In fact, a long connection is relative to the usual short connection, that is, long time to maintain the client and the server connection state.The usual short connection operation steps are:Connect-"Data transfer-" close the

1. The relationship between the HTTP protocol and the TCP/IP protocolLong connections and short connections to HTTP are essentially TCP long connections and short connections. HTTP belongs to the Application layer protocol, which uses the TCP protocol at the Transport Layer and IP protocol at the network layer. The IP protocol mainly solves the network routing and addressing problems, the TCP protocol mainly solves how to reliably pass the packet over the IP layer, so that all the packets sent b

Database Connection Pool Druid usage instructions, database connection druid Replace it with the optimal database connection pool based on factors such as comprehensive performance, reliability, stability, scalability, and ease of use. Druid: druid-1.0.29 Database Mysql.5.6.17 Replacement target: replace C3P0 with druid Reason for replacement: 1. Performance hika

Related queries in MySQL (internal connection, outer connection, self-connection)When using the database query statement, the single table query sometimes can not meet the project business requirements, in the project development process, there are many needs are involved in multi-table connection query, summarize the

1.Linux Link Concept There are two kinds of Linux links, one is called hard link (Hard link), the other is called Symbolic link (symbolic link). The ln command produces a hard link by default. The specific use is: Ln–s source file Destination file. "Hard Connection" A hard connection refers to a connection through an index node. In a Linux file system, a file

First, why should we use connection pooling technology?There are some drawbacks to the method of establishing and shutting down resources in the previous database connection. Steerage Traditional Database access: Once the database access corresponds to a physical connection, each operation of the database to open, close the physical

transferred from: http://www.cnblogs.com/heyonggang/p/3660600.html1. TCPConnectionWhen the TCP protocol is used in network communication, before the actual read and write operation, the server and the client must establish a connection, when the read and write operation is completed, the two sides no longer need the connection when they can release the connection

1. Use database connection pooling to optimize program performance L Application direct access to links disadvantage Each request requires a link to the database, and a database creation connection typically consumes relatively large resources and is created for a long time. If the site 100,000 visits a day, the database server needs to create 100,000 connections, a huge waste of database resources, and ver

PHP uses Redis persistent connection methods, phpredis connection details This article describes how PHP uses Redis persistent connection. We will share this with you for your reference. The details are as follows: Php-redis Project address on github: https://github.com/phpredis/phpredis Pconnect function declaration Time_out indicates the number of seconds after

HTTP is a non-connected transaction protocol, the underlying use of TCP, connection pooling is a TCP connection, the purpose is to make multiple HTTP requests on a TCP connection to improve performance. At the end of each HTTP request, HttpClient will determine if the connection can be persisted, and if it can be manag

socket interpretation, HTTP and socket long connection and short connection difference. TCP/IP TCP/IP is a protocol group that can be divided into three levels: Network layer, Transport layer and application layer. At the network layer are IP protocols, ICMP protocols, ARP protocols, RARP protocols, and BOOTP protocols. There are TCP protocols and UDP protocols in the transport layer. ； In the applicat

HTTP is a non-connected transaction protocol, the underlying use of TCP, connection pooling is a TCP connection, the purpose is to make multiple HTTP requests on a TCP connection to improve performance. At the end of each HTTP request, HttpClient will determine if the connection can be persisted, and if it can be manag

int I;Enum color {red, green, blue };Const double Pi = 3.1415;Union rep {...};Void test (INT p ){};Foo;Bar B; 3. compilation unit When a C or CPP file is being compiled, the Preprocessor first recursively contains the header file to form a single source file containing all necessary information. This source file is a compilation unit. This compilation unit will be compiled into a target file (. O or. OBJ) with the same name as the CPP file name ). The Conne