galera cluster postgresql

MariaDB Galera Cluster deployment (how to quickly deploy MariaDB Cluster) MariaDB, as a branch of Mysql, is widely used in open-source projects, such as the Popular openstack. To ensure the high availability of services and improve the load capacity of the system, cluster deployment is essential.MariaDB

Fragmentation of the cluster When a cluster is split into several individual groups due to network reasons (a group may be a single node or several interconnected nodes), the data is inconsistent and may result in brain fissures and inconsistent data. In this case, only one set of nodes can continue to serve, the state of this set of nodes is primary. When this happens,

MariaDB Galera Cluster deployment (how to quickly deploy the MariaDB Cluster), galeramariadb MariaDB, as a branch of Mysql, is widely used in open-source projects, such as the Popular openstack. To ensure the high availability of services and improve the load capacity of the system, cluster deployment is essential.Mar

Tags: mariadb mysql centos galeraMARIADB Galera cluster Installation:Operating system: Centos7.4 versionNumber of clusters: 3 nodesHost information: 192.168.153.142 node1 selinux=disabled firewalld off192.168.153.143 Node2 selinux=disabled Firewalld Close192.168.153.144 node3 selinux=disabled Firewalld CloseBuild steps1. Mutual parsing between hosts: Three nodes are executedVim/etc/hosts192.168.153.142 Node

] wsrep:new cluster View:global state:412b064f-1944-11e4-b9f8-a70b3179cc21:6, view# 5:primary, Nu Mber of Nodes:3, my index:0, protocol version 3140801 15:32:51 [Warning] wsrep:gap in state sequence. Need state transfer.140801 15:32:53 [note] wsrep:running: ' Wsrep_sst_rsync--role ' joiner '--address ' 127.0.0.1 '--auth ' Sst:sstpass '--datad IR '/var/lib/mysql/'--defaults-file '/etc/my.cnf '--parent ' 8388 "140801 15:32:54 [Note] wsrep:prepared SST r

Information_schema.key_column_usage as COn (T.table_schema = C.constraint_schema and t.table_name = C.table_nameand c.constraint_name = ' PRIMARY ')Left JOIN Information_schema.statistics as SOn (T.table_schema = S.table_schema and t.table_name = S.table_nameand S.index_type in (' Fulltext ', ' SPATIAL '))WHERE T.table_schema not in (' Information_schema ', ' performance_schema ', ' MySQL ')and T.table_type = ' BASE table 'and (T.engine ORDER by T.table_schema,t.table_name;The above script list

Install the MARIADB version of the package with the Galera cluster feature first:Official Document: https://mariadb.com/kb/en/mariadb/getting-started-with-mariadb-galera-cluster/The replication implemented by Galera cluster differ

Tags: galera clusterFirst, MySQL Galera introductionMysql/galera is a multi-master cluster of Mysql/innodb with the following features:1) Synchronous replication2) active-active multi-Master topology3) Any node in the cluster can read and write4) Automatic identity control,

Galeramysql cluster memo Mysql Cluster BitsCN.com FeaturesMySQL/Galera is a multi-master synchronization cluster, but it only uses the MySQL/InnoDB engine and has the following features:Synchronous replicationTopology of multiple master serversRead/write on any nodeAutomatically control members and delete faulty nodesA

Tags: Percona mode workflow Database transparent clone mysq VPD BinFirst, Galera cluster introduction 1, galera cluster: 集成了Galera插件的MySQL集群，是一种新型的，数据不共享的，高度冗余的高可用方案，目前Galera Cluster

#Galera集群特点 No delay between clusters, synchronous replication. While Master-slave master-slave asynchronous replication, there is a delay. Active-active Multi-master, the cluster internal server is written at the same time, must wait for all the databases in the cluster to complete the data write, the feedback is complete, so there is no data loss s

MARIADB, as a branch of MySQL, is already widely used in open source projects, such as hot OpenStack, so the cluster deployment is essential to ensure high availability of the service while increasing the load capacity of the system.MariaDB Galera Cluster IntroductionThe MARIADB cluster is a MARIADB synchronous multi-h

First, MySQL Galera introduction1. Galera characteristicsMysql/galera is a multi-master cluster of Mysql/innodb with the following features:1) Synchronous replication2) active-active multi-Master topology3) Any node in the cluster can read and write4) Automatic identity cont

Tags: mysql mariadb PXC galeraFirst, Background introductionEither Binlog or Gtid, the essence of which is in the form of I/o_thread and Sql_thread synchronization, because the replication delay can not avoid the criticism, based on the MARIADB introduced Galera cluster to solve the problem.Second, Galera cluster intro

DirectoryOpenstack-mitaka Overview of High AvailabilityOpenstack-mitaka High-availability environment initializationOpenstack-mitaka High-availability Mariadb-galera cluster deploymentOpenstack-mitaka High Availability of memcacheOpenstack-mitaka High Availability pacemaker+corosync+pcs High availability clusterOpenstack-mitaka Highly Available certification services (Keystone)Openstack-mitaka High Availabi

Setup of MySQL/MariaDB Galera cluster in Linux MariaDB Introduction MariaDB is a MySQL Branch maintained by the open-source community. It is developed by MySQL founder Michael Widenius and uses a GPL license. MariaDB is designed to be fully compatible with MySQL, including APIs and command lines, so that it can easily become a substitute for MySQL. For more information, see: Http://mariadb.org/(official web

://s2.51cto.com/wyfs02/M01/87/36/wKiom1fXos-w04eaAAAPNcN7CnE045.png "title=" Qq20160913145458.png "alt=" Wkiom1fxos-w04eaaaapncn7cne045.png "/>In node two (if there are multiple nodes on each other) perform the above 1 to 29 steps to install the configuration database.On node one execution:Modify/USR/LOCAL/MARIADB/ETC/MY.CNF.D/WSREP.CNF The following parameters in the [mysqld] sectionWsrep_on=onBinlog_format=rowDefault-storage-engine=innodbinnodb_autoinc_lock_mode=2bind-address=0.0.0.0Wsrep_prov

=192.168.3.131 Port port=3306 Protocol=tcp Accept '--permanent firewall-cmd--add-rich-rule ' rule family=ipv4 source address=192.168.3.129 port port=4567 protocol=tcp Accept '--permanent firewall-cmd--add-rich-rule ' rule Family=ipv4 source address= 192.168.3.130 Port port=4567 protocol=tcp Accept '--permanent firewall-cmd--add-rich-rule ' rule Family=ipv4 source address=192.168.3.131 Port port=4567 protocol=tcp Accept '--permanent The following 4-6 steps operate on the

Official documents:http://galeracluster.com/documentation-webpages/index.htmlFirst, the working principle of Galera clusterThe main focus is data consistency. Transactions can be applied either to each node or not to all. So, as long as they are configured correctly, the database remains in sync.Unlike traditional MySQL replication, galera replication plug-ins can solve multiple problems, including multiple

Label:MARIADB, as a branch of MySQL, is already widely used in open source projects, such as hot OpenStack, so the cluster deployment is essential to ensure high availability of the service while increasing the load capacity of the system. MariaDB Galera Cluster IntroductionThe MARIADB cluster is a MARIADB synchronous