dns failover

operation. ：Start configuring Database Mirroring Backup and failover: Right-click the database selection you want to back up-tasks-mirroring,:Run mode Select "High Security with failover (synchronous) ... , click Configure security to start the configuration.Our demo uses 2 SQL Server servers, one witness server, configure the "Include witness server instance" step needs to check the option to "Yes", selec

Background information: After the main library is switched switchover or failover, the client is able to obtain its own connection to the main library. Environment modification:1. Modify $oracle_home/network/admin/tnsnames.ora priocm= (DESCRIPTION = (address_list= (address = (PROTOCOL = TCP) (HOST = ocm1.example.com) (PORT = 1521)) --Main library (address = (PROTOCOL = TCP) (HOST = ocm2.example.com) (PORT = 1521)) --Reserve

:192.168.9.23Once the secondary replica of the NIC 2 is broken, to use a network card to replace, but the secondary replica of the network card 1 to assume client trafficBest settings: do not separate the network segment, regardless of whether the NIC has been teamingare set to allow cluster network traffic on this network and allow clients to connect through that network, that is, keep the default settingsIf the cluster node does not communicate with the witness shared folder, such as domain sh

important to note that the same cluster of servers must be running the same hardware-schema version of the Windows Servers 2008 operating system, such as using the x64 or Itanium versions. The servers in the cluster must be members of the same Active Directory domain, and DNS is required for name resolution.Cluster objects:The Cluster service is responsible for managing all the capabilities of the failover

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 Power status (available only based on the dedicated failover cable) oHello Information Package (also sent through all other ports) oAct 1. Several Concepts about Master/Slave are clarified:

Using shared folders to implement the quorum disk for a failover clusterIn the previous blog post we've introduced how to build a Distributed File System (DFS), and we've explained how to configure DFS to be highly available, so today's blog post We'll show you how to use DFS to make our Windows cluster arbitration disk.Don't know if you know me in front of the blog post Why do I want to be highly available for DFS configuration, in fact, I configure

retrieves all registered IP addresses from the DNS server, attempts to connect to them sequentially or in parallel, and connects to the first responding server.For older client drivers or third-party data providers, because the Multisubnetfailover parameter cannot be used in the connection string, it is recommended that the time-out period of 15 seconds be increased for each additional IP address in order to prolong the client connection. For example

Use shared folders to implement arbitration disks for failover clusters and cluster ArbitrationUsing shared folders to implement arbitration disks for failover Clusters In the previous blog, we have introduced how to build a Distributed File System (DFS) and how to configure high availability for DFS, on this basis, we will explain how to use DFS as the arbitration disk for our Windows Cluster. I don't know

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