postgresql multi master replication

Implement Multi master Replication Using Stored ProceduresThe method is simple. The principle is: slave uses a table to save the masterfile and position of each master, and then uses the scheduler to traverse and change to different masters at intervals.Note the following: * The MySQL scheduler is disabled by default

Login 3306:$mysql-uroot-h127.0.0.1-p3306To create a replication user:Mysql>grant replication Slave, replication client on * * to [e-mail protected] ' localhost ' identified by ' repl ';Mysql>flush privileges;Log in from the library:$mysql-uroot-h127.0.0.1-p3307Mysql>change master to master_host= ' localhost ', master_

: Query OK, 0 rows affected (0.01 sec) Here, the configuration is complete. Test Let's do this, create a table on C, then kill it on D and see if there is any on C. Create database example;CREATE TABLE Example.dummy ( id varchar); #note here was ' not ' And then, on D, see if there's a table: Show tables in example; You will see: +-------------------+ | Tables_in_example | +-------------------+ | dummy | +-------------------+ 1 row in S

The new version of mysql sets up multi-thread master-slave Replication I. First, get Mysql-5.7.11-1.el6.x86_64.rpm-bundle.tar Tar xf mysql-5.7.11-1.el6.x86_64.rpm-bundle.tar Yum install-y mysql-community-client-5.7.11-1.el6.x86_64.rpm mysql-community-common-5.7.11-1.el6.x86_64.rpm mysql-community-libs-5.7.11-1. el6.x86 _ 64.rpm mysql-community-libs-compat-5.7.1

PostgreSQL replication cluster overview, PostgreSQL replication Cluster For pg replication, high availability, and load balancing clusters, write an overview for future reference. Pg has the following various replication-Based Cl

Galera is a synchronous multi-master cluster for MYSQL/INNODB databases. Some features and benefits of Galera are: Synchronous replication. Multi Master topology. Read/write to any cluster node. Automatic membership control. Data consistency between

corrected directly by commandView the current server_idShow variables like ' server_id ';Set to another value againSet global server_id=2;Once again, you can start the slave.Then we can do some test work, the establishment of a new database on the main library or a new table or add changes to the record will be synchronized to the library4, MySQL some other unusual solutionThe following error occurred using MySQL:Mysqladmin:can ' t turn off logging; Error: ' Access denied; You need the SUPER pr

seconds:Mysql> CREATE TABLE New_table2 (ID int,str varchar (100));Query OK, 0 rows affected (1.07 sec)(3) Query from the server at this time, table New_table2 is not createdMysql> Show tables;+----------------+| Tables_in_test |+----------------+| hahahaha || test_table || Wochenggongle |+----------------+4 rows in Set (0.01 sec)(4) When you create a table on the primary server, you will find that the creation time is only 0.09 seconds, becauseOnce timed out, it automatically drops to asynchron

= 10Early-plugin-load = ""Default_storage_engine = InnoDBInnodb_data_home_dir =/data/3306/dataInnodb_data_file_path = Ibdata1:10m:autoextendInnodb_log_group_home_dir =/data/3306/dataInnodb_buffer_pool_size = 128MInnodb_log_file_size = 32MInnodb_log_buffer_size = 8MInnodb_flush_log_at_trx_commit = 1Innodb_lock_wait_timeout = 50[Mysqldump]QuickMax_allowed_packet = 16M[MySQL]No-auto-rehash[Myisamchk]Key_buffer_size = 32MSort_buffer_size = 768KRead_buffer = 2MWrite_buffer = 2M[Mysqlhotcopy]Interact

internal firewall of PostgreSQL, which represents one of the two most important configuration files in a PostgreSQL cluster. It allows the user to define any type of authentication based on the source of the request. A database administrator, understanding the pg_hba.conf file is critical because this file determines whether a slave is allowed to connect to master