1. Several Concepts about active/standby are clarified: FailoverLinkFailoverLink is used to communicate with each other's working status. The information transmitted on Failoverlink includes the current status (active and standby) of the o device) o
1, to find out about the "master" the "preparation" of several concepts:
Failover Link
Failover link is used to communicate each other's working status between devices, and the information passed on Failover link includes:
o Current status of the
It is necessary to note that the SQL Server failover cluster (SQL Server Failover Cluster) We build is an availability cluster, not a load-balanced cluster, which is designed to ensure continuity and availability of services, not to improve service
MHA IntroductionMHA is a MySQL, a Japanese MySQL Daniel written in Perl failover scheme to ensure the high availability of the database system. During downtime (usually within 10-30 seconds), complete failover, deploy MHA, avoid master-slave
Tri Hua, Network name DbsnakeOracle ACE Director,acoug Core expert("Tri Hua article series" has been Tri Hua exclusive authorized in the cloud and the official account of the ink will be released, please continue to pay attention to)This article
This article introduces the connection management in Oracle RAC Environment in detail, and describes what is connect time load Balancing, Runtime Connection load Balancing, connect timer, respectively. Connection Failover and Runtime Connection
The connection URL of the database is configured as jdbc:oracle:thin:@ (description= (address_list= (address= (protocol=tcp) (HOST=VIP1)) (port=1521) ( Address= (PROTOCOL=TCP) (HOST=VIP2) (port=1521)) (Load_balance=yes) (Failover=on)) (Connect_data=
Implement PostgreSQL failover in CentOS 6.5
Pgpool-II is an intermediate component that works between the PostgreSQL multi-server and the PostgreSQL Data Warehouse client.
It provides the following functions:
Connection Pool: pgpool-II is used to
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