mysql group replication

slave database data is inconsistent with the master database.Application Scenario: businesses with low requirements for data read consistency 3. semi-synchronous Replication 1) Semi-sync MySQL 5.5 introduces semi-synchronous replication (semisync) to ensure that at least one slave is consistent with that of the master.Http://dev.mysql.com/doc/refman/5.6/en/

I. Principles of MySQL master-slave Replication 1. mysql replication process: each time a write operation is executed, it will save a copy to its own database. At the same time, this write operation will also be stored in a binary log file, and save them as events. Therefore, each write operation or modification operat

, Last_committd,sequence_number,In parallel replay by group on Slave, you need to wait for all SQL execution in the group to complete, then sort by sequence_number in the flush phase,This guarantees that the write order of Binlog on Master is the same as the write order of Binlog on slave.ResourcesHttp://www.tuicool.com/articles/EvQjErmysql5.7 About parallel replication:http://blog.itpub.net/28218939/viewsp

The ultimate goal of data replication is to synchronize the data of one server with the data of another server, which can achieve data redundancy or load balancing of services. A master server can connect multiple slave servers, and the slave server can act as the master server in turn. The master-slave server can be located in different network topologies. Due to the powerful mysql

problem. Master-slave multi-level replication Many read operations can use a single maste and multiple slave. However, increasing the number of slaveIO threads connected to the master after a certain slave increases the pressure on the master, resulting in Data Replication latency. Multi-level replication is designed to solve this problem. If you want to impleme

an asynchronous copy process, copied from one MySQL instace (we call master) to another MySQL instance (we call it Slave). The entire replication process between Master and Slave is done primarily by three threads, of which two threads (SQL thread and IO thread) are on the Slave side, and another thread (IO thread) on the master side.To implement

. Not all storage engines Support statement-based replication. 3.2. Record-Based Replication (Row-Based Replication) MySQL adds record-Based Replication to record actual data changes in binary logs, which is similar to other DBMS implementations. This method has advantages a

in the sync phase.MySQL 5.7 Parallel replication enables master-slave multithreaded replication based on the main library binary log group Commit and identifies the same set of transactions in the binary log log last_commited= N and the order of all transaction commits within the group transaction. In order to increas

Asynchronous replication: MySQL natively supports one-way, asynchronous replication. Asynchronous replication means there is a delay in copying data from one machine to another-most importantly this means that the data cannot be copied/applied to the slave at the same time when the application's transaction commit has

+ ---------- + -------------- + usage + | mysql-bin.000001 | 107 | usage | + usage + ---------- + -------------- + ------------------ + file and position will be used in the slave database to install 1) install mysql 2) Change the mysql configuration file my. cnf server-id = 2 # add, note that here is the underlined replay-log =/var/log/

Replication of Mysql-13mysql, replication of Mysql-13mysql 1. mysql replication Concept The DDL and DML operations of the primary database are uploaded to the replication server through

First, Mysql 5.6 new features....Improvements to replication features⒈ supports multi-threaded replication, (slave-parallel-workers=0 0: Disables multithreading;) it actually turns on the corresponding independent thread for each database. That is, each library has a separate (SQL thread), if the online business, only one database or most of the pressure on the i

Master-slave replication for mysql and master-slave replication for mysql Mysql master-master replication Summary I. Main Ideas of Mysql Master/Slave