lte failover

After you have created a failover cluster earlier, we will configure failover clustering in this article primarily to configure the quorum disks and cluster shared volumes used by the failover cluster. Open "Failover Cluster Manager" in Server1 's "administrative Tools", as shown in Figure 1, right click on the cluster

Myth #1: After a server failover, a running transaction continues to execute Of course it's wrong! Each failover is accompanied by some form of recovery. However, if a connection is disconnected because of a server or instance crash that occurs when a transaction is not being executed, SQL Server has no way to re-establish the context of the transaction and continue to perform the transaction after the

Myth #1: After a server failover, a running transaction continues to execute Of course it's wrong! Each failover is accompanied by some form of recovery. However, if a connection is disconnected because of a server or instance crash that occurs when a transaction is not being executed, SQL Server has no way to re-establish the context of the transaction and continue to perform the transaction after the

DHCP failover in Windows Server 2012 allows administrators to deploy DHCP services with native high availability, the main objectives of this feature are as follows:DHCP failover in Windows Server 2012 allows administrators to deploy DHCP services with native high availability, the main objectives of this feature are as follows:Always provide DHCP service availability on the corporate network.If a DHCP serv

Misunderstanding #1: After server failover, ongoing transactions continue to be executed Of course this is wrong! Each failover is accompanied by some form of recovery. However, if the transaction being executed does not have a Commit, the connection is disconnected because the server or instance crashes, SQL Server cannot re-establish the transaction context on the Server after the

this, we have been ignoring the azure of a unique secret, currently I have not found other public cloud to provide DSR support!Below we create two virtual machines using CentOS 6.7 Images and configure a Linux server failover cluster on the Azure China edition.Pre-preparation work:1. Place two virtual machines in the same cloud service and must use standard type virtual machines.2. Assign a fixed network IP address (DIP) and public IP address (Reserv

1 Flush any unsent redo from the primary database to thetarget standby database. If the primary database can be mounted, it may be possible to flush any unsent archived andcurrent redo from the primary database to the standby database. if thisoperation is successful, a zero data loss failover is possible even if theprimary database is not in a zero data loss data protection mode. Ensure that Redo Apply is active at the targetstandby database. Sta

The previous gitlab dual-host mutual backup environment (refer to the previous blog post) still has a problem: the backend database is a single server and there is a risk of spof. In the past few days, we have investigated relevant materials, mysql-proxy can be used to solve this problem. Environment required: Build a master-slave environment with two MySQL servers: Master-Master Build mysql-proxy on one serverSummary 1. Set up the MySQL Master/Slave environment: Master-Master 2. Implement

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. SelectNAME, RESETLOGS_TIME, LOG_MODE, OPEN_MODE, PROTECTION_MODE, REMOTE_ARCHIVE, DATABASE_ROLE, SWITCHOVER_STA

15.6 Upgrading AlwaysOn Failover Clusters15.6.1 PrerequisitesThe prerequisites for upgrading an FCI (failover cluster instance) are roughly the same as for upgrading a standalone instance.You cannot upgrade a standalone instance to an FCI. If you need to upgrade a standalone instance of SQL Server to an FCI, you must do so by following these steps.(1) Install the FCI.(2) Migrating the user database database

If we want to ensure high availability of SQL Server, we can adopt a Failover cluster. The simplest failover cluster is two servers, one active server and the other standby server. This is the cluster in AP mode. Another mode is the AA mode, that is, both servers are running SQL Server instances. SQL Server does not have RAC like Oracle, so it is impossible to say that the two servers run the same instanc

Label:1.failover Pre-check#如果有多个standby数据库 to see which standby received the latest redo. sql> SELECT * from V$archive_dest_status; #查看standby库接收到的最新的SCN sql> Select thread#,sequence#, Last_change#,last_time from V$standby_log; thread# sequence# last_change# last_time ---------------------------------------------- 1 7128 126385274 2 May-April -16 1 0 0 1 0 0 sql> 2. Exe

Today our topic is a new feature in Windows Server 2012, DHCP failover, DHCP is not too much to introduce this is a very basic knowledge, DHCP in Windows Server 2012 In fact there are three major new features, namely:DHCP Fail-OverPolicy-based allocationPowerShell for DHCPIn Windows server R2, two high-availability options are available for DHCP server deployment. Each of these options is related to a number of questions.DHCP in Windows

After Node 1 is reboot, why is the resource of Node 1 not failover to node 2? Symptom: the customer asked a question, that is, during the reboot process of Node 1, through monitoring, there was no After Node 1 is reboot, why is the resource of Node 1 not failover to node 2? Symptom: the customer asked a question, that is, during the reboot process of Node 1, through monitoring, there was no After Node

The failover processing process bitsCN.com after the master database of db0101 is down in 48 nodes groups online Failover processing after 48 nodes in the online group and db0101 master database are down When a call is received, db0101 is Down and an error is reported: (1) Error 500,503,504 Error on the application page (2) email alert db0201 is down now! 1. Initial Determination of symptoms Ping ipv222

11g Dataguard standby cut into the main library and restored to the original standby environment after the test is completed#######################Overview:11204 single machine to implement DG, because the local requirements (read-write mode) to open standby, and then the original production environment can not have any impact, still external services;The idea is that: Standby direct failover to primary db, then the original DG relationship is destroy

1. Switch: User actively switch;2. Failover: Main Library failure, forced to switch; Switchover: General switchover switch are planned to switch, characterized by switching, will not lose any data, and this process is reversible, the entire dataguard environment will not be destroyed, All physical and logical standby in the original Dataguard environment can continue to work.Before you make a physical standby switch for Dataguard, you need to be awar

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

A failover cluster must meet certain requirements of the hardware, software, and network infrastructure, and it requires an administrative account with the appropriate domain permissions. Specifically as follows: (i) Hardware requirements for failover clusters In a failover cluster, the following hardware is required: (1) Server: It is recommended that you use

This topic explains how to use the Failover Cluster Management tool or Cluster.exe to evict a node from a Windows Server 2008 failover cluster. After a node is exited from the cluster, the node cannot host the clustered mailbox server. If, for any reason, you attempt to evict a node from a failover cluster, you can use the last procedure in this topic to force t