Occurred While Attempting To Update From The Database

October_2013/doc/html/ac_user_guide/images/update_resolve_relationship_tag_alert_popup.png' alt='Occurred While Attempting To Update From The Database' title='Occurred While Attempting To Update From The Database' />North Korea, officially the Democratic Peoples Republic of Korea abbreviated DPRK, is a country in East Asia constituting the northern part of the Korean Peninsula. On this forum, a user finds ORA00604 after attempting to run a newly created table using selectfrom cdc The message they are receiving is. ZJ-Error-Reporting-768x572.jpg' alt='Occurred While Attempting To Update From The Database' title='Occurred While Attempting To Update From The Database' />Installing an Exchange Server 2. Database Availability Group. The first article in this series on Exchange Server 2. Database Availability Groups provided an overview of Exchange 2. DAG concepts. In this article well go through the installation of a simple Exchange 2. DAG with two members. The DAG will have a MAPI network as well as one replication network. The file share witness will be another member server in the domain that has no Exchange 2. Preparing to Deploy an Exchange Server 2. Database Availability Group. Installing the Mailbox Servers. Database Availability Group members run the Mailbox server role. Although they can also run the Client Access server role this is separate and not required for DAG operations. In some situations the Client Access role should not be installed on the same server, for example if you plan to use Network Load Balancing for Client Access server high availability NLB is not supported to co exist with the Failover Clustering that DAGs leverageif you have any reason to believe you might later remove the Client Access server role removal of a single server role is not possible in Exchange Server 2. Exchange Server 2. Windows Server 2. R2 and Windows Server 2. However, due to the dependency on Failover Clustering you should note the following requirements Windows Server 2. R2 must be Enterprise edition to support Failover Clustering. Windows Server 2. Standard or Datacenter edition. To install your Exchange Server 2. DAG members In my example scenario I have two servers E1. MB1 and E1. 5MB2 both running Windows Server 2. Each server is installed with both the Client Access and Mailbox server roles. A third server E1. FSW exists for the file share witness. Note thanks to the concept of incremental deployment a DAG can be created using existing mailbox servers that are already in production with active mailboxes on them. There is no hard requirement to build brand new mailbox servers to be able to deploy a DAG. Configuring Permissions on the File Share Witness. Because the file share witness server is not an Exchange server some additional permissions are required. The Exchange Trusted Subsystem group in Active Directory must be added to the local Administrators group on the server. The file share witness also requires the File Server feature installed. PS C Add Windows. Feature FS File. Server. PSC Add Windows. Feature FS File. Server. And you should verify that File and Printer Sharing is allowed through the firewall. If the file share witness is another Exchange server, such as a Client Access server, it already has the correct permissions configured. For more information see Configuring Networking for Exchange 2. Database Availability Groups. In this example each server is connected to the 1. The two Exchange servers are also connected to the 1. DAG replication traffic. Dedicated replication networks are not a requirement for Database Availability Groups, however if you do choose to deploy one or more replication networks you must ensure that DNS registration is disabled the network interfaces connected to those networks. The replication interfaces are also not configured with a default gateway. In the case where replication interfaces for the same replication network are on separate IP subnets, static routes are configured. However in this example that is not required. The configuration of the network interfaces is important for DAG network auto config to be successful. For more information see Misconfigured Subnets Appear in Exchange Server 2. School Awards Day Program Template there. DAG Network. Configuring Existing Databases. In my example the server E1. MB1 and E1. 5MB2 had databases that were automatically created during Exchange 2. To prepare for database replication within the DAG I performed the following tasks Mailbox Database 1 on E1. MB1, which already contains active mailboxes, has been moved from the default folder path onto storage volumes dedicated to databases and transaction log filesMailbox Database 2 on E1. MB2, which contained no mailboxes, has been removed from Exchange. Those steps may not be required in your environment depending on your existing databases. Pre Staging the Cluster Name Object. Depending on your environment the pre staging of the Cluster Name Object CNO may be required it is a requirement if you are running Windows Server 2. DAG members, but in any case it is a recommended best practice. The CNO is simply a computer account object in Active Directory. There are two methods you can use to create the CNO. The first is to manually create the CNO using Active Directory Users Computers. Create a new computer object with the name that you intend to give to your DAG. Then disable the computer account. Next, grant the computer account for the first DAG member Full Control permissions for the CNO computer account. Note that you may need to click the View menu in AD Users Computers and enable Advanced Features before you can see the Security tab for the computer object. The other method for creating the CNO is to use Michel de Rooijs Cluster Name Object Pre Staging script. Deploying an Exchange Server 2. Database Availability Group. Creating the Database Availability Group. In the Exchange Admin Center navigate to Servers Database Availability Groups and click the icon to create a new DAG. Enter the following details for the new Database Availability Group DAG name this should match the CNO you pre staged earlier. Witness server this is required for all DAGs, even those that have an odd number of members and hence run in node majority quorum mode. Witness directory this is optional. If you do not specify a directory Exchange will choose one for you. IP address the DAG requires an IP address on each IP subnet that is part of the MAPI network. If you do not specify IP addresses the DAG will use DHCP instead. Click Save when you have entered all of the required details. Adding Database Availability Group Members. After the DAG has been created it still does not contain any actual members. These need to be added next. Highlight the new Database Availability Group and click the icon to manage DAG membership. Add the servers that you wish to join the DAG and then click Save. This process will install and configure the Failover Clustering feature of Windows Server 2. DAG members to the cluster. Note if youre using a non Exchange server for the file share witness, and you have correctly configured the permissions on the FSW, you will still see a warning at this stage that the Exchange Trusted Subsystem is not a member of the local administrators group on the FSW. This is a bug that can be disregarded. When the operation is complete the Database Availability Group will display the members you added. In the next part of this series we will look at configuring the database copies in the DAG.