在connection的生命里,会一直有一个user thread(以及user thread对应的THD)陪伴它. Connection和Session概念 来自Stackoverflow的一个回答: A session is just a result of a successful connection. Any MySQL client requires some connection settings to establish a connection, and after the c…
Name ipsec.conf - IPsec configuration and connections Description The optional ipsec.conf file specifies most configuration and control information for the Openswan IPsec subsystem. (The major exception is secrets for authentication; seeipsec.secrets…
A novel massively parallel supercomputer of hundreds of teraOPS-scale includes node architectures based upon System-On-a-Chip technology, i.e., each processing node comprises a single Application Specific Integrated Circuit (ASIC). Within each ASIC n…
The QSslSocket class provides an SSL encrypted socket for both clients and servers. More... Header: #include <QSslSocket> Since: Qt 4.3 Inherits: QTcpSocket Note: All functions in this class are reentrant. List of all members, including inherited me…
Latest Paho Status (2) 摘自:http://modelbasedtesting.co.uk/ I last wrote about the state of Paho in October. This post is a continuation of that one. Java Client Some of you might know that James Sutton, who is co-project lead with me and has worked on…
curl.1 the man page Related: Manual FAQ HTTP Scripting NAME curl - transfer a URL SYNOPSIS curl [options / URLs] DESCRIPTION curl is a tool to transfer data from or to a server, using one of the supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTT…
Unit2: Transport 学习目标: how TCP set up a connection what TCP segment looks like how can TCP be in high performance detect errors Finite State Machine, a basic tools and approach to network protocol design 2.1 The TCP service model Transmission Control…
是这样的,最近我在开发Api(重构),用的数据库是Sqlserver,使用的Orm是 SqlSugar(别问我为什么选这个,boss选的同时我也想支持国人写的东西,且文档也很全). 被催的是,写好了程序本地(windows10 pro 64 bit)运行正常,一部署到测试机器(centos7.2 64 bit)就报错: 报错1 An unhandled exception occurred while processing the request. SqlSugarException: Engl…
A TCP connection progresses through a series of states during its lifetime. The following diagram illustrates the possible states for a TCP connection and how the states transition based on various events from either the network or from the local TCP…
今天项目中报了如下错误 The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 查了下网上,都是说是mysql默认8小时关闭不用的连接.用数据库连接池导致的.可是项目中这个功能是用来导数据的,是动态连接,直接java jdbc 获取connection的,用完之后就关闭了.最后运维的人员查出来是i…
Three-Way Handshake The following scenario occurs when a TCP connection is established: The server must be prepared to accept an incoming connection. This is normally done by calling socket, bind, and listen and is called a passive open. The client i…
The last packet sent successfully to the server was milliseconds ago. The driver has not received any packets from the server. 今天操作数据库较大数据库访问量的时候出现问题,大致是数据库连接缓冲池的问题,弄了半天的mysql (ubuntu). 解决办法: (1)使用JDBC URL中使用autoReconnect属性,url添加 &autoReconnect=true&a…
Visual SourceSafe Internet---------------------------Could not find the Visual SourceSafe Internet Web Service connection information for the specified database (\\169.16.51.10\hr phase 2 vss). Would you like to launch the Visual SourceSafe connecti…
