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OceanBase使用libeasy原理源码分析:客户端 - 数据库(内核) - 清泛网 - 专...

..._t用来封装一个要发出去的请求,easy_client_t用来封装一个TCP连接的发起端,easy_hash_t是一个哈希表,easy_hash_list_t是采用开放寻址解决hash冲突的链表节点。 一、异步请求 在OceanBase 0.4 中,mergeserver请求chunkserver是异步的方式。实...
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Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

...ost" the socket connector is used, but when you connect to "127.0.0.1" the TCP/IP connector is used. You could try using "127.0.0.1" if the socket connector is not enabled/working. share | improve t...
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Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)

...ill connect via a Unix-domain socket to a server on the local host, or via TCP/IP to localhost on machines that don't have Unix-domain sockets. Your OS supports Unix domain sockets, but PostgreSQL's Unix socket that psql needs either doesn't exist or is in a different location than it expects. Sp...
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What is a “callback” in C and how are they implemented?

...ack is invoked. In the following program we create a socket to listen for TCP connection requests and when a request is received, the function doing the listening then invokes the callback function provided. This simple application can be exercised by running it in one window while using the telnet...
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Repairing Postgresql after upgrading to OSX 10.7 Lion

...ful with this: This setting changes the access from the domain socket to a TCP connection. While it probably works, you might lose a bit of performance and usable ports on your machine which can be a problem depending on your setup. The solution provided by John is correct. – p...
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腾讯Tencent开源框架介绍(持续更新) - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...服务的核心框架采用C++编写,跨语种的RPC采用类似protobuf通信模式。源码安装部署请参考: https://tarscloud.github.io/TarsDocs/installation/source.html,不得不说他们的文档写的还是非常详细的。 安装完成是这样的: 管理平台: ...
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Format of the initialization string does not conform to specification starting at index 0

...verAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword; Specifying TCP port Server=myServerAddress;Port=1234;Database=myDataBase;Uid=myUsername;Pwd=myPassword; Oracle Using TNS Data Source=TORCL;User Id=myUsername;Password=myPassword; Using integrated security Data Source=TORCL;Integ...
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Lost connection to MySQL server at 'reading initial communication packet', system error: 0

...o I need to allow port 3306 in iptables: >iptables -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT share | improve this answer | follow | ...
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搭建高可用mongodb集群(三)—— 深入副本集内部机制 - 大数据 & AI - 清...

...的4个。。。 心跳 综上所述,整个集群需要保持一定的通信才能知道哪些节点活着哪些节点挂掉。mongodb节点会向副本集中的其他节点每两秒就会发送一次pings包,如果其他节点在10秒钟之内没有返回就标示为不能访问。每个节...
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How to test an Internet connection with bash?

... tcping would also be of help here. ( tcping www.yahoo.com 80 ) && echo "Site is up" – David Ramirez Aug 7 '15 at 15:14 ...