influxdb replication

1. Preparatory workFirst, you need to prepare 2 machines and install MySQL separately. My version here is 5.1.73,mysql database installation please refer to: http://www.cnblogs.com/tangyanbo/p/4289753.html Linux System for CentOS The machines were: master:192.168.1.227 slave:192.168.1.225 Scenario: Both master and slave are the databases that were just created, i.e. the data is in a consistent scenario2. Configure replicationThe approximate steps are as follows: 1) Create a copy account on each

to • It is supported by many frameworks • It can be combined with a variety of other replication methods • It can support PostgreSQL very well (e.g. using pl/proxy) Light and shadow tend to go together, so fragmentation has its shortcomings, as follows: • Adding servers to a running cluster is cumbersome (depending on the type of partition function) • Your flexibility may be severely reduced. • Not all types of queries will have the same effect on a

Object replication lvalue-rvalue reference, object Replication Passing real parameters to functions and functions return copies of temporary variables by value. Function efficiency is crucial to execution performance. If such a copy operation is avoided, the execution time may be greatly shortened. Class CMessage {private: char * m_pMessage; public: void showIt () const {cout CMessage message;Message. m_p

The data synchronization function of mysql not only provides load balancing for database queries to a certain extent, but also provides great help for database redundancy, backup, recovery, and load balancing. The data synchronization function can be implemented through master-slave replication, while master-slave replication is performed asynchronously. mysql only supports one master and multiple slaves, a

Master-slave replication for mysql and master-slave replication for mysql Perform the following steps for master-slave replication: Assume that the two master-slave mysql servers are deployed on the same machine on different ports. For example, the server ip address is 58.83.223.20. Ports: 3306 and 3307 If the two services are master and slave, the two services a

I. OverviewKeep one server's data in sync with other server data. Data from one master library can be synchronized to multiple repositories, and the repository itself can be configured as the main repository for other servers.Main applications:1) Data distribution2) Load Balancing3) Pseudo backup. Add more secure technical supplements based on backup4) High availability and failover. Avoid MySQL single point of failure5) Upgrade test. Before upgrading the database, copy the data to the standby s

Shallow Replication refers to the replication behavior based entirely on the data content in the memory, that is, it faithfully copies the data to the target memory region regardless of the original data type. The default copying constructor and the value assignment function of the C ++ compiler are all shortest copies. For example: Class A {public: A (int I): m (I) {} PRIVATE: int M ;}; A (2); a B ();

Build a MYSQL master-slave replication structure and a mysql master-slave replication Structure 1. Select two servers as the master and backup databases respectively. 2. log on to the server, Yum install mysql; Yum install mysql-server; 3. Start the server Service mysqld start 4. log on to mysql as the root user and execute the following commands to add and authorize the

Mysql master replication and mysql Replication The customer needs high availability in the project, and the database is a key part of high availability. I have studied the high availability of many mysql instances, using mysql cluster and mysql master-slave master-master replication. The mysql cluster is too complex and has five nodes. Of course, it should be dep

For example, distinguish between shallow replication and deep replication in Python, and for example, distinguish between python The copy module is used to copy objects. This module is very simple and only provides two main methods: copy. copy and copy. deepcopy, which respectively represent the shortest copy and deep copy. What is light replication, what is dee

One, main library thread status (state) valueThe following list shows the most common states (show processlist) that may be seen in the State column of the Binlog dump thread of the primary server in master-slave replication. If the Binlog dump thread is not visible on the primary server, this means that replication is not running, that is, no slave hosts are currently connected. Sending Binlog eve

Tags: identified server user login status Master AB replication (master-slave replication)you can have MySQL implement:1. Data backup (master server data is all synchronized to slave server)2. Can load balance reduce the pressure of the primary server3. True MySQL read and write separation Configuration MethodPrimary server:1. Primary server MY.CNF Configurationcat/etc/my.cnf[Mysqld]Log-bin=mysql_binserver

Mysql master-slave replication and mysql master-slave ReplicationMysql master-slave replication step 1) download MySQL (Ubuntu) sudo apt-get install mysql-server mysql-client2) Change mysql configuration file vi/etc/mysql/my. the cnf modification content is as follows # bind the local IP address, as master bind-address = 192.168.0.75 # As master server-id = 1 # Remove comment log_bin =/var/log/mysql/mysql-b

The object is either a value copy or a reference copy. string, number, and Boolean variables are valuesCopy. Arrays, objects, and functions are reference replication.1. Value replication: 2. Reference replication: Value replication and reference replication in the AngularJS

Deep replication is a copy of the reference type. Replication is a replication of value type. For example: Using system;Using system. Collections. Generic;Using system. text; Namespace Test{Public class content{Public int val; } // Icloneable is inherited only when deep replication is used.// Public class cloner: iclon

In transactional replication, data synchronization delays are often encountered. Sometimes these delays are due to the execution of an update in publication, such as Update TA set col=? Where?, this update contains a huge amount of data. At the subscription end, this update is decomposed into multiple commands (one command per data row by default) and applied to the subscription. In the last resort, we need to skip this big business and let

MongoDB Master-slave replication is a master data snapshot that does not need to be completed in advance from the database like MySQLBackground: MongoDB supports one master one from or multiple copies from1) Master node:Mongod--dbpath=/usr/mongodb/data/--logpath=/usr/mongodb/log/mongodb.log--master# #可选--oplogsize--directoryperd main node oplog size (in megabytes)2) Slave node:Mongod--dbpath=/usr/mongodb/data/--logpath=/usr/mongodb/log/mongodb.log--sl