<p>This article describes how to create a disaster recovery instance.</p> <p><strong><span style="font-size:18px">Overview</span></strong></p> <p>To ensure high availability of business, we recommend that you create a disaster recovery instance within the period for maintenance you set. When the region where a general instance is located becomes faulty and cannot be connected to, the business can be switched into a remote disaster recovery instance for proper service running.</p> <p><strong><span style="font-size:18px">Prerequisites</span></strong></p> <p>You have successfully created a general instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/mongodb/Manual.Instance_Management.Create_Instance.Create_Common_Instance" target="_blank">Create a General Instance</a>.</p> <p><strong><span style="font-size:18px">Usage Guidelines</span></strong></p> <p>1. A maximum of one remote disaster recovery instance can be created in each region.</p> <p>2. Computing specification and storage specification of remote disaster recovery instance is consistent with that of the general instance.</p> <p><strong><span style="font-size:18px">Procedures</span></strong></p> <p>1. Log in to <a href="http://pinganyun.com/console/mongodb/overview" target="_blank">DDS Management Console</a>.</p> <p>2. In the left navigation pane, click <strong>DDS Cluster</strong> to enter the <strong>DBPaaS for DDS</strong> page.</p> <p>3. Select the target region.</p> <p>4. Click <strong>Manage</strong> in the <strong>Operations</strong> column of the target general instance, and select <strong>Information</strong> tab in <strong>Configuration Management</strong>.</p> <p>5. In the right area of <strong>Information,</strong> click <strong>Create Remote Instance</strong> to enter the <strong>Create Remote Instance </strong>page.</p> <p>6. In the <strong>Common Instance Information</strong> area, view and confirm the basic information of the general instance.</p> <p>7. In the <strong>Remote Configuration</strong> area, create a remote disaster recovery instance based on the following information.</p> <table border="1" cellpadding="0" cellspacing="0"> <tbody> <tr> <td style="background-color:#ededed; vertical-align:top; width:135px"> <p><strong>Configuration item</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:649px"> <p><strong>Description</strong></p> </td> </tr> <tr> <td style="vertical-align:top; width:135px"> <p>Region</p> </td> <td style="vertical-align:top; width:649px"> <p>In the region where a remote disaster recovery instance is located, select the region different from that of the general instance.</p> </td> </tr> <tr> <td style="vertical-align:top; width:135px"> <p>Zone</p> </td> <td style="vertical-align:top; width:649px"> <p>The availability zone where a remote disaster recovery instance is located.</p> </td> </tr> </tbody> </table> <p>8. Click <strong>Confirm Order</strong>.</p> <p>9. On the <strong>Order Confirmation</strong> page, confirm purchase information and click <strong>CONFIRM OPEN</strong>.</p> <p><strong><span style="font-size:18px">Result</span></strong></p> <p><strong>Method 1:</strong></p> <p>1. On the <strong>Payment Result</strong> page, click <strong>VIEWORDER</strong> to enter the <strong>Order Management</strong> page.</p> <p>2. The <strong>Status</strong> of target order is <strong>Finished</strong>.</p> <p><strong>Method 2:</strong></p> <p>In the left navigation pane, click <strong>DDS Cluster</strong> to enter the <strong>DBPaaS for DDS</strong> page. Select the region where a remote disaster recovery instance is located, and view the new DDS remote disaster recovery instance. The <strong>Instance Type</strong> is <strong>Dataguard Instance</strong>. The <strong>Status </strong>changes from <strong>Pending</strong> to <strong>Running</strong>.&nbsp;&nbsp;</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20202408105550-1b16f3f99bb8.png" style="height:172px; width:830px" /></p>