postgresql multi master replication

supports one-way, bidirectional, chained cascade, and other different scenarios of replication. During the replication process, one server acts as the primary server (Master), and one or more other servers act as slave servers (salve). replication is unidirectional: MèS, but also bidirectional mÓm, of course, can also

delay for a single piece of data includes: Total Duration T = P + N + L; Where P is the pull worker processing time, N is the length of the network transmission, and L is the Load worker processing time. The binlog of the same library is not a good parallel pull of the sequence, the network length of the transmission process is also rigid, the only thing that can accelerate is the storage processing. Parallel multi-threaded inbound op

)However, the master-slave replication also brings a series of other problems, the typical is the main never synchronization, leading to the reason that the main is not synchronized: The server is generally multi-core multi-threading, resulting in the primary node can perform multiple read and write operations at the s

Label:I. Deployment notes1.1 Implementation EnvironmentThe experimental environment for this document is as follows:Pgsql Host: 192.168.1.45Pgsql Standby Machine: 192.168.1.50Software and system versionsPgsql version: Pgsql 9.2.4Linux version: Redhat 5.81.2 Document DescriptionThis document details the dual-machine extension of PG, so that the Pgsql database is equipped with dual-machine hot-standby-stream replication function. Note that there is a

Postgres/usr/local/pgsql_data######## Primary Library Initialization Pgsql# su-postgres# # Pgsql not be able to use the root user by default$ pg_ctl-d $PGDATA init# # Initialize DB# # # Configure master-Slave flow replication$ CD $PGDATA$ vim postgresql.conflisten_addresses = ' * 'Wal_level = Hot_standbyMax_wal_senders = 2log_destination = ' stderr '# # # The following is the turn on logging featureLogging

-3,... , while Slave-1 is no longer responsible for select. Slave-1 transfers the burden of the master copy thread to its own body. This is called the concept of multi-level replication. Issue 6: When a select is sent to the MySQL proxy, this time the slave-2 response, the next time by the slave-3 response, so that the query cache can not be exploited. Should f

Tags: keep tables password synchronous data orm min. com installation software IPOMaster-Slave Server IP:192.168.11.131 PostgreSQL Master192.168.11.132 PostgreSQL SlaveServer System version:# Cat/etc/redhat-releaseRed Hat Enterprise Linux Server Release 7.2 (MAIPO)PG Version:System default 9.21. Install software, configure environment variablesMaster-Slave Server:# yum Install

operationI am here MySQL standalone multi-instance, 3306, 3308, 3309Main library is 3306, from library to 3308,3309(1), on the Master Master Library1. Set Server-id value and turn on Binlog function > vi/etc/my.cnf [Mysqld]#用于同步的每台机器server-id are not the same. Server-id = ten Log-bin =/data/mysql56/data/mysql-bin 2. Restart the main library > Ser

Tags: mysql replicationIn MySQL under the master-slave replication delay problem has been in the industry is relatively large, master-slave delay due to the network disk and other related factors, but the main impact is that the master too busy write causes slave not effective from Relay_ Log to read the latest related