<p>This article describes how to create read-only instances including intra-city read-only instances and remote read-only instances.</p> <p><span style="font-size:18px"><strong>Overview</strong></span></p> <p>For the purpose of reducing pressure of reading RDS general instances and realizing elastic expansion of database reading capability, you can create one or multiple read-only instances to meet the massive reading demand of database.</p> <p><span style="font-size:18px"><strong>Prerequisites</strong></span></p> <ol> <li>You have successfully created a general instance. For more information, see <a href="http://pinganyun.com/ssr/help/database/RDS/User_Guide_RDS_MySQL.Instance_Management.Create_Instance.Create_Common_Instance" target="_blank">Create a General Instance</a>.</li> <li>The system has successfully created an intra-city DR instance in the time segment you set.</li> </ol> <p><span style="font-size:18px"><strong>Usage Guidelines</strong></span></p> <ol> <li>Multiple intra-city read-only instances can be created. We recommend that you create no more than five read-only instances.</li> <li>Only one remote read-only instance can be created in each region.</li> <li>The storage specifications of a read-only instance are the same as that of the general instance by default.</li> </ol> <p><span style="font-size:18px"><strong>Procedures</strong></span></p> <p>1.&nbsp; Log in to the <a href="http://pinganyun.com/console/rds/overview" target="_blank">RDS Console</a>.</p> <p>2.&nbsp; In the left navigation pane, click <strong>RDS-MySQL</strong> to enter the <strong>DBPaaS for RDS-MySQL</strong> page.</p> <p>3.&nbsp; Select the target region.</p> <p>4.&nbsp; Click <strong>Manage</strong> in the <strong>operation</strong> column of the target general instance and select <strong>Information</strong> tab.</p> <p>5.&nbsp; In the <strong>Information</strong> area, click <strong>CREATE READ ONLY INSTANCE</strong> on the right side of the page and enter the<strong> Create Read Only Instance</strong> page.</p> <p>6.&nbsp; In the <strong>Information of Main Instance </strong>area, view and check the basic information of a general instance.</p> <p>7.&nbsp; Create a read-only 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:138px"> <p><strong>Configuration item</strong></p> </td> <td style="background-color:#ededed; vertical-align:top; width:650px"> <p><strong>Description</strong></p> </td> </tr> <tr> <td style="vertical-align:top; width:138px"> <p>Region</p> </td> <td style="vertical-align:top; width:650px"> <p>The region of a read-only instance. You can select intra-city or remote region to create an intra-city or remote read-only instance based on the business demand.</p> </td> </tr> <tr> <td style="vertical-align:top; width:138px"> <p>Availability Zone</p> </td> <td style="vertical-align:top; width:650px"> <p>The availability zone of a read-only instance.</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200207164906-12b346f399d6.png" style="height:22px; margin:0px; width:90px" />: A intra-city read-only instance can only be created in the availability zone of the intra-city DR instance.</p> </td> </tr> <tr> <td style="vertical-align:top; width:138px"> <p>Computing specifications</p> </td> <td style="vertical-align:top; width:650px"> <p>The computing specifications of a read-only instance include CPU and memory. You can select specifications different from that of a general instance to meet business demand.</p> </td> </tr> <tr> <td style="vertical-align:top; width:138px"> <p>Billing method</p> </td> <td style="vertical-align:top; width:650px"> <p>Billing method of a read-only instance is the same as that of the general instance and cannot be modified.</p> </td> </tr> </tbody> </table> <p>8. Click <strong>Confirm Order</strong>. Enter <strong>Order Confirmation</strong> page to confirm relevant information of the read-only instance.</p> <p>9. Click <strong>Confirm</strong> <strong>Open</strong>.</p> <p><span style="font-size:18px"><strong>Result</strong></span></p> <p><strong>Method 1:</strong></p> <ol> <li>On <strong>Payment Result</strong> page, click <strong>View Order </strong>to enter the <strong>Product Order</strong> page.</li> <li>The <strong>Status</strong> of target order is <strong>All finished</strong>.</li> </ol> <p><strong>Method 2:</strong></p> <p>In the left navigation pane, click <strong>RDS-MySQL</strong>. On the <strong>DBPaaS for RDS-MySQL</strong> page, select the region of the read-only instance. You can view the just created read-only instance and its <strong>Status</strong> turns from <strong>Pending</strong> into <strong>Running</strong>.</p> <p>&bull;&nbsp; &nbsp;Intra-city read-only instance</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200207164810-1d65dee09032.png" style="height:194px; width:830px" /></p> <p>&bull;&nbsp; &nbsp;Remote read-only instance</p> <p><img src="https://obs-cn-shanghai.yun.pingan.com/pcp-portal/20200207164828-1248d7cf9815.png" style="height:196px; width:830px" /></p>