dynamodb connection

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 problem, the TCP protocol mainly solves how to reliably pass the packet over the IP layer, so that the receiving end of th

Database Connection Pool, database connection pool java I. Why should I use the database connection pool? Database Connection resources are very expensive, especially when accessing the database through the network. A simple physical connection causes low performance. Theref

1. Relationship between HTTP protocol and TCP/IP protocol HTTP persistent connections and short connections are essentially TCP persistent connections and short connections. HTTP is an application layer protocol. TCP is used at the transport layer and IP is used at the network layer. The IP protocol mainly solves the problem of network routing and addressing. The TCP protocol mainly solves how to transmit packets reliably on the IP layer, so that the other end of the network receives all packets

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 protocol Long 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

What are "persistent connections" and "Transient connections "? Interpretation 1 The so-called persistent connection means that the connection is maintained no matter whether or not it is used after a socket connection is established, but the security is poor; The so-called short connection means that 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

In IntroductionC ++Before the internal connection and external connection in, describe some concepts. 1. Statement A declaration introduces a name into a scope; In c ++, it is legal to repeat a declaration in a scope. The following are declarations: Int foo (int, int); // function pre-declaration Typedef int Int; // typedef Declaration Class bar; // class pre-declaration Extern int g_var; // ext

　　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

Analysis of Database Connection Pool (2), analysis of Database Connection Pool In the previous blog, I briefly introduced the connection process and resources consumed by common databases, and briefly discussed the connection pool, in this article, we will mainly look at the use of the database

Mondiran creates a connection and mondiran creates a connection.The url used to create a connection using jdbc is in the following format: jdbc: mysql: // hostname: port/database? Key1 = value1 key2 = value2, which must start with "jabc: mysql" in the URL. The address and port of the database server, database name, and other attributes must be declared, take "? "Segmentation, each attribute is separated by

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

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

A glimpse of Linux's distinction between hard connection and soft connection I. Two connection files in Linux and their creation methods. There are two connection files in Linux mdash; although both soft connection and hard connection