failover and failback

Java Oracle thin and OCI connectivity for failover of multiple databasesFirst, Thin wayWhere 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=BOMC)))Where load_balance=on means load is on, Java creates session connections in random ways;Load_banlance=off indicates that the load is closed, and Java crea

Tags: should odd-case operating system always off between error sharing--============================================================== Estimate is the last time before the Spring Festival blog, also estimated to be the last time this year on duty thunder, exclamation into SQL Server, also failed SQL Server. --============================================================== Scenario Description: Operating system version: Windows Server 2012 Datacenter Version Database version: SQL SERVER 2012 Ente

Create a Hyper-V failover cluster1. Add the Failover Clustering feature1) on LIUJB-NODE01, open the Server Manager to add the role function.650) this.width=650; "Width=" 768 "height=" 521 "title=" clip_image001 "style=" margin:0px;padding-top:0px; padding-right:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px; Background-image:none, "alt=" clip_image001 "src=" http://

exceptions? [WARN] +--------+--------+-----------+| Server | do_db | ignore_db |+--------+--------+-----------+| Master | TestDB | |+--------+--------+-----------+ Replication user exists? [Pass]Checking server_id values [pass]Checking server_uuid values [pass]is slave connected to master? [Pass]Check Master information file [pass]Checking InnoDB compatibility [pass]Checking storage engines compatibility [pass]Checking lower_case_table_names setting [pass]Checking slave delay (seconds behind

Tags: blog enabled ref NTA tin role Primary notTechnical recommendations and programmes. 要求failover后不重建备库，并能够把failover的数据库重新切换回备库 主库为newtest,备库为snewtest备库上已经开启了闪回Get a reference to the SCNSQL> select current_scn from v$database;CURRENT_SCN----------- 4491930View the Flashback database feature is open.SQL> select flashback_on from v$database;FLASHBACK_ON------------------------------------YESThen we start

Label: SQL Server AlwaysOn technology relies on the Windows WSFC feature, the Failover Clustering feature. Both Liunx corosync+pacemaker and Oracle Grid Infrastructure need to complete the control of cluster resources and resource isolation. WSFC transfers and isolates the resources associated with SQL Server, such as nodes, IP, disk resources, and so on. This article describes the installation of Windows WSFC and prepares you for an AlwaysOn

Recently in a Windows Server 2012 failover run environment, plan to run SQL Server on top of AlwaysOn, the virtual server is running on the VMware ESXi 5.5.0 platform and found if the virtual server uses e1000e () Type of network adapter, failover communication often fails, when two servers ping each other, occasionally drops packets, if the E1000,vmxnet3 type of network card is used, the

In each column, "WebSphere contrarian investors" will answer questions, provide guidance and discuss the underlying topics associated with WebSphere products, often giving proven recommendations that contradict popular perceptions. Knowledge consolidation Time Over the past few weeks, I've spent a lot of time providing in-house training for technical sales experts on the newly released Ibm®websphere®application Server V7. Part of the training has been allocated to basic materials to back up th

Remember last year that you wrote a piece of Exchange Server 2007 SP1 CCR, but it's a Windows Server 2003-based platform. The failover cluster for Windows Server 2008 has been a number of projects, including SQL 2005, Exchange 2007, and so on. Today, I'm going to repeat the CCR feature of the Mail to my friends who love Microsoft technology and hope you will support me. Prerequisite A before can follow along with the steps provided at this article s

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

source and sink to the Channela1.sources.r1.channels=C1a1.sinks.k1.channel= C1The remaining agents are identical except for the host IP address and other configurations　　agent2-agentn Start commandWhen it comes to flume multi-level start-up, it is recommended to start from data sourceBin/flume-ng agent-c conf-f conf/avro-logger.conf-n a1-dflume.root.logger=info,console　　Agent1 Start commandBin/flume-ng agent-c conf-f conf/exec-avro.conf-n agent1-dflume.root.logger=info,console　　Writing scripts

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