failover scenarios

Mysql high-availability architecture MHA setup and test failover MHA project website Https://code.google.com/p/mysql-master-ha/ 1. environment introduction 1. host deployment Manager: 10.10.54.154Master: 10.10.54.156Server load balancer 1: 10.10.54.155 (backup master) Server load balancer: 10.10.54.157 2. general stepsA. First, use ssh-keygen to achieve mutual key-free login between the four hostsB. install MHAmha4mysql-node, mha4mysql-manager softwa

ProspectThe company built 2012 DHCP and configured the failover, all functions OK. Suddenly found that the address pool is not enough, the original is because the rejected phone in the filter is not synced to another, resulting in a phone connection, consuming a large number of IP addresses. So how do we get this in sync? The idea is simple. Export this list before the main, and then import the new one. Just no graphical import, so use a script to let

These two days in a detailed look at the man carp document. found that the original carp can not only achieve failover (failover) cluster, through a simple configuration or can be a local LAN load balance. Carp load Balancing uses the Arpbalance function, which is understood literally as the use of ARP load balancing, that is, the second layer of the OSI7 layer model-the data link layer. Therefore, using a

Tags: mysql master-slave failover A: Environment 192.168.1.100master 192.168.1.101slave1 192.168.1.102slave2 slave1,slave2 are all connected to the master. II: Simulate master failure Close Master Instance servicemysqlstop at this point, showslavestatus\g on Slave1,slave2 will find an error: Last_ Io_error:errorreconnectingtomaster ' [emailprotected]:3307 ' -retry-time : 60retries:1 IO process and SQL process status: slave_io_running:connecting (t

Before creating an SQL Server 2000 failover cluster, you must Configure Microsoft cluster service (MSC) and use the Cluster Administrator in Microsoft Windows NT4.0 or Windows 2000 to create at least one cluster disk resource. Before running the SQL Server installer, log on to the Cluster Administrator to locate the cluster drive, because this information is required to create a Failover cluster. 1. on the

15.5 Remove AlwaysOn Failover clusters15.5.1 PrerequisitesTo remove an AlwaysOn failover cluster, you must use the permissions of the local administrator and the permissions for all nodes that are logged on to the failover cluster.You must run the SQL Server Setup Wizard from each node of an AlwaysOn failover cluster t

=> 180, 7 failover_delay => 5 ); 8 end; 9/ PL/SQL procedure successfully completed. SQL> select name, failover_method, failover_type, goal, clb_goal from dba_services 2 where name = 'taf '; NAME FAILOVER_METHOD FAILOVER_TYPE GOAL CLB_G ------------------------------------------------------------------------ TAF BASIC SELECT LONG SQL> ho lsnrctl status .......... Service "TAF" has 1 instance (s ). Instance "GOBO4A", status READY, has 2 handler (s) for this service... The command completed su

Today, we demonstrated the switching process between switchover and failover on the virtual machine. The customer is concerned with failover. We directly turn off the virtual storage switch to simulate array faults. Failover steps are as follows: 1. select NAME,RESETLOGS_TIME,LOG_MODE,OPEN_MODE,PROTECTION_MODE,REMOTE_ARCHIVE, DATABASE_ROLE,SWITCHOVER_STATUS,FORC

Before you create a SQL Server 2000 failover cluster, you must configure Microsoft Cluster Service (MSCS) and use the Cluster Administrator in Microsoft Windows NT4.0 or Windows 2000 to create at least one cluster disk resource. Before running SQL Server Setup, note the location of the cluster drive in the Cluster Administrator because this information is required to create a new failover cluster. Only SQL

Tags: problem eth delay NEC System Environment file RET Unable to attach load Java Oracle thin and OCI connectivity for failover of multiple databases First, Thin way This method is easy to use and is not uncommon.The URL isjdbc:oracle:thin:@ (description= (Load_balance=on)(Address= (PROTOCOL=TCP) (host=127.0.0.1) (port=1521))(Address= (PROTOCOL=TCP) (host=10.132.111.14) (port=1521))(Connect_data= (service_name=busi_db))) The load_balance=on indicates

Cisco ASA failover Command Injection Vulnerability (CVE-2015-0675) Release date:Updated on: Affected Systems:Cisco ASA 1, 5500Description:CVE (CAN) ID: CVE-2015-0675 The Cisco ASA 5500 Series Adaptive Security Device is a modular platform for providing security and VPN services. It provides firewall, IPS, anti-X, and VPN services. The failover ipsec function of Cisco ASA Software has a security vulnerab

Oracle10g physical master database and slave Database: switchover switch: Switch Under normal circumstances when the master database and slave database data are synchronized, mainly used for Master/Slave maintenance, switch drill, etc.; failover Switch Oracle 10 Gb physical master database and slave Database: switchover switch: Switch Under normal circumstances when the master database and slave database data are synchronized, mainly used for Master/S

DHCP Hot Backup Using the Failover protocol of DHCP I. Current backup solutions and Defects Currently, DHCP servers adopt the cold backup solution. Only one server provides services and the backup server is enabled only when the primary server goes down. The disadvantage of this solution is: 1. High switching latency when the primary server fails. In this case, you need to disconnect the master instance from the network and change the IP address of th

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, and this process is automatically performed in most cases, manual intervention is not required. In some cases, data rollback is required for automatic failover. Deployment of replica sets (number of replica

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 save and connect to the PostgreSQL server and reuse new connections with the same attributes (that is, the user name, data library, and Protocol version ), reduces the sales of connections and increases the o

The previous article has been prepared for the configuration of the mirrored database, and the next step is to enter the real configuration phase First, set security on the mirror database server and start the database mirroring session 1, expand the database, select Virtualmanagerdb, right-click Select Task-Mirror 2, click Configure security, select is, including the witness server 3, remove the witness server, the future configuration 4, set the principal server, fill in the end nam

Tags: SQL Server 2014 log shipping13.4 Fail-Over13.4.1 Fault LocationAs explicitly mentioned in the previous sections, log shipping consists of three basic jobs: backup jobs, copy jobs, and restore jobs. Use the previous festive log transfer monitoring function to locate which job has a problem:If there is a problem with the backup job, check the primary server status.If there is a problem with the restore job, check the secondary server status, or the secondary database is in standby mode when

Tags: RAC failover Viewing listening, using a grid user 11GRAC1:11grac1->lsnrctlstatus lsnrctlforlinux:version11.2.0.3.0- Productionon14-aug-201500:30:26 copyright (c) 1991,2011,Oracle. allrightsreserved. connectingto (description= (address= (PROTOCOL=IPC) (Key=listener)) statusofthe LISTENER------------------------alias listener version tnslsnrforlinux: version11.2.0.3.0-production startdate 13-aug-201522:17:25 Uptime nbsP;0days2hr.13m

AlwaysOn Availability Group Scenarios 1. Availability GroupsAn "availability Group" (Availability Group, or AG) supports a failover environment for a discrete set of user databases (known as "Availability Databases", which collectively implement failover). An availability group supports a set of primary databases and multiple sets of corresponding secondary datab

In the master-slave architecture, create an event on the master, as shown below: mysqlshowcreateevent 'insert' \ G; * *************************** 1. row ***************************.. In the master-slave architecture, create an event on the master, as shown below: mysqlshowcreateevent 'insert' \ G; * *************************** 1. row ***************************.. In the master-slave architecture, create an event and virtual host on the master, as shown below: When slave is synced, the resul