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Setting up replication using the create RDS wizard

The Create Replicated Data Set wizard guides you through the process of setting up replication using automatic synchronization.

 To set up replication using the Create Replicated Data Set wizard

1. Launch the wizard from the host that you want to be designated as the Primary in the RDS. Note that in a shared environment you must launch the wizard from the master node.
2. Choose Replication > Create Replicated Data Set. To use the pop-up menu, right-click Replicated Data Sets and select Create Replicated Data Set Wizard.
3. In the Replicated Data Set Creation Wizard page, select Beginner User or Advanced User.
4. If you selected Advanced User, skip to step 6. If you selected Beginner User, the Important Prerequisites page is displayed.
5. In the Important Prerequisites page, click the check boxes and then click Next. Note that this page does not appear if you selected Advanced User in step 2. You cannot proceed if the data volumes and SRL of the same names and sizes do not exist on all the hosts in the RDS.

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6. Complete the Assign a name to the Primary RVG page as follows:

Primary RVG Name	Enter the name of the Primary RVG. The name of the Primary RVG is designated as the name of the RDS. For example, hr_rvg.
Include VxVM ISP Volumes Only	Select this checkbox only if you want to include VxVM ISP (Intelligent Storage Provisioning) volumes in the RVG. You cannot include both VxVM ISP volumes and VxVM non-ISP volumes in the RVG.

After you have provided the required information, click Next.

7. Complete the Select the Disk Group and Data Volumes to be replicated page as follows:

Disk Group	Select the required disk group name from the drop-down list. For example, hrdg. The drop-down list displays shared disk groups only if you are connected to the master node.
Data Volumes	Select the names of the data volumes by holding down the SHIFT key and clicking the names of the volumes you want to select. For example, hr_dv01, hr_dv02. Note that volumes with the same names must be created on the Primary host and all Secondary hosts. If you selected Include VxVM ISP Volumes Only, the list displays VxVM ISP volumes only.

After you have provided the required information, click Next.

8. In the Select the Replication Log page, select the name of the SRL, for example, hr_srl, and then click Next. If you selected Include VxVM ISP Volumes Only, the list displays VxVM ISP volumes only.
9. In the Summary Information for Creating the Primary Replicated Volume Group page, select Create Primary RVG after reviewing the information. If the operation of creating Primary RVG was successful, the next page displays a message that indicates that the Primary RVG has been created successfully.

   If the operation fails, a failure message lists the possible reasons of failure in the Result Details area. Read the details carefully and take appropriate corrective action. For more information about the error, note down the Unique Message Identifier (UMI) that is displayed with the error message, and then refer the Veritas Technical Services knowledge base.

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     Note   UMI is a string of the format "V-xx-yy-zz". For example, V-38-1-11 is the UMI displayed when an invalid Secondary host name is entered.

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10. To add the Secondary now, click the Do you want to add Secondary? check box. If you want to add the Secondary later, click Finish.
11. Complete the Add Secondary Wizard page as follows:

     

    Hostname/IP Address for Replication
    Primary	Enter a host name or specify the IP address that can be used for replication. The Primary host name must be resolvable and reachable from the Secondary host. For example, seattle. If you entered the IP address, it must be reachable from the Secondary host. The Replication IP column in the Secondary RVG view displays the value of the Primary host.
    Secondary	Enter a host name or specify the IP address that can be used for replication. The Secondary host name must be resolvable and reachable from the Primary host. For example, london. If you entered the IP address, it must be reachable from the Primary host. The Replication IP column in the Primary RVG view displays the value of the Secondary host.
    Replication Setting	The default values for Replication Mode, SRL Protection, and Protocol are displayed. You can keep the default or change these replication settings. To change the replication settings, click Advanced. The Advanced Settings dialog box appears.

12. To change the replication settings, complete the Advanced Settings dialog box as follows, or go to the next step.

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Secondary DG	If the name of the Secondary disk group is other than the default, enter the correct Secondary disk group name. This disk group must contain the SRL and data volumes that are to be associated with the Secondary RVG that is being created.
Primary RLINK	Enter the new Primary RLINK name if the default name is not appropriate.
Secondary RLINK	Enter the new Secondary RLINK name if the default name is not appropriate.
Replication Settings
Replication Mode	Asynchronous is selected by default. Select the required mode of replication. To enable synchronous mode, select Synchronous-Override. To set the replication mode to synchronous=fail, use the command-line interface. For more information, refer to Administering Veritas Volume Replicator.
SRL Protection  AutoDCM, DCM, Override, Off	By default, SRL protection is set to AutoDCM. Select the required value to change the SRL protection mode. To enable SRL protection, select AutoDCM, DCM, or Override. To disable SRL protection, select Off. If you disable SRL protection, the SRL is allowed to overflow. To set the SRL protection mode to fail, use the command-line interface (CLI). For details on using the CLI, refer to Administering Veritas Volume Replicator.   If you are changing the replication settings for a bunker Secondary, AutoDCM or DCM are not available because a bunker does not contain data volumes, and therefore cannot use a DCM to track changes in the case of SRL overflow.
Latency Protection  Override, Off	By default, latency protection is set to Off. To enable latency protection and limit the number of updates by which the Secondary is allowed to fall behind, select Override. If you select Override, the wizard displays the boxes Latency Low Mark and Latency High Mark with default values of 9950 and 10000 respectively.  To disable latency protection, select Off.  To set the latency protection to fail, use the command-line interface (CLI). For details on using the CLI, refer to Administering Veritas Volume Replicator.
If Latency Protection is set to Override:
Latency High Mark	Displays only if Latency Protection is set to Override. The default is 10000. Enter the required numerical limit.
Latency Low Mark	Displays only if Latency Protection is set to Override. The default is 9950. Enter the required numerical limit.
Packet Size	The default is 8400. Enter the required packet size.
Protocol	Indicates the network connectivity between the Secondary and the Primary. UDP is selected by default.   If you are changing the replication settings for the bunker Secondary, you can select STORAGE, in addition to UDP or TCP.  If the bunker is replicating over IP, the protocol can be set to UDP or TCP. If the storage is directly accessible by the Primary, for example, DAS or NAS, set the protocol to STORAGE.  Select UDP, TCP, or STORAGE.
Set Bandwidth Limit	To control the network bandwidth to be used by VVR for replication, click the Set Bandwidth Limit check box; then specify the bandwidth limit. Note that the specified bandwidth limit must be greater than 56 kilo bits per second (kbps).  To disable Bandwidth Throttling, clear the Set Bandwidth Limit check box. This sets the bandwidth limit to none. By default, Bandwidth Throttling is disabled.

13. Select OK, and then select Add Secondary.
14. In the next page, the message indicates the result of the add Secondary operation. If the operation of adding Secondary RVG was successful the page displays a success message.

    If the operation fails, the page displays the failure message and lists the possible reasons of failure in the Result Details area. Read the details carefully and take appropriate corrective action. For more information about the error, note down the Unique Message Identifier (UMI) that is displayed with the error message, and then refer the Veritas Technical Services knowledge base.

15. Select Do you want to synchronize Secondary? to synchronize the Secondary using automatic synchronization; otherwise, to quit the wizard, click Finish.
16. In the Synchronize Secondary Using Automatic Synchronization page, select Synchronize, and then select Finish.

Note:
To add more volumes after creating the RVG, use the Associate Volume task.