nginx failover

1. Practice ScenarioSimulates the failover of an upstream flume agent when sending an event (failover)1) Initial: Upstream agent passes event to active downstream node Collector12) Collector1 fault: Kill the process to simulate the way the event is sent to Collector2, complete the failover3) Collector1 Recovery: Rerun the process, after the maximum penalty time, the event will be sent back to Collector12. c

Redis SentinelThe module has been integrated into the redis2.4+ version, although it is not release at the moment, but it can be attempted to use and understand, in fact Sentinel is still a bit complicated. The main function of the Sentinel is to provide the Redis m-s (master,slaves) cluster with 1 master Survival Detection 2) cluster M-S Service monitoring 3) automatic failover, m-s role conversion and other capabilities, in one respect, improve the

MySQL high availability solution: MHA-based Automatic Failover Cluster bitsCN.com MySQL high availability solution: MHA-based Automatic Failover ClusterComparison of common high availability solutions for MySQL (from the official manual) Only MySQL Cluster and DRBD + Heartbeat are available for automatic database failover. These two HA solutions do not depend on

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 consistency issues, and save on the cost of purchasing new servers, Does not affect server performance, easy to install, and does not change existing deployments.also s

Introduction to the high availability of a replica set the replica set achieves high availability through automatic failover. When the master node fails, the slave node can be elected as the master node, in most cases, this process is automatically performed without manual intervention. In some cases, data rollback is required for automatic failover. Deployment method of replica set (copy integration Introd

An oracle 11GR2 javasuard switchover failover article, hoping to help you. 1. switch: the user actively switches;2. failover: the master database fails and the switchover is forced; Switchover, all physical and logical standby operations in the dataguard environment can continue.Note the following before performing the physical standby switch of the volume uard:1. confirm that the network connection between

-1.5.6-1.el6.noarch.rpm-y?Service Construction:Environment preparationMonitor???? Server1???? 192.168.88.121???????? # #监控最好有独立的服务器Master???? Server2???? 192.168.88.122Slave???? Server3???? 192.168.88.123Slave???? SERVER4???? 192.168.88.124The monitor needs to be connected to Ms to get the running statusAuthorization : basic: Super, Replication,slave,reload,Sometimes, when multiple programs run MySQL failover,# #监控避免单点Create,insert,drop,select (--forc

Label: What is LooksAlive check and is alive check A SQL Server failover cluster is a highly available scenario that is based on a hot standby on the Windows Cluster service. While the cluster is running, the Windows Cluster service periodically detects the resource health state of the node and, if a failure occurs, switches the SQL Server service from the failed node to the available node based on a pre-defined