<p>Elastic Load Balancing (ELB) can effectively integrate the business system entry, load-balance the traffic flow, and enhance the availability of the cluster. The internet ELB service and intranet ELB service are provided. These are appropriate for internet business customers who required high-performance, highly scalable and respond massive users&rsquo; request. At the same time, PingAn Cloud provide the high reliability classic F5 load balancing for traditional financial customers. The Internet ELB Instance is mainly applicable for Websites or APPs of which the service is publishing on Internet. Comparatively, the Intranet ELB Instance is mainly applicable for the communication of intranet systems within VPC.</p>

Product Components



<p><strong>High-performance</strong></p> <p>ELB extends the bandwidth of network devices and servers based on business load scaling to increase throughput, enhance network data processing capabilities and increase network flexibility and availability. &nbsp;</p> <p><strong>Flexib</strong><strong>ility</strong><strong> and </strong><strong>H</strong><strong>ighly</strong><strong>-a</strong><strong>vailability</strong></p> <p>Providing two types of ELB services, Internet ELB and Intranet ELB, capable of selecting different ELB products and strategies according to the specific business scenario; with availability of more than 99.9% &gt;= 99.9%.</p> <p><strong>Cost Saving</strong></p> <p>ELB saves money by eliminating the need to purchase large hardware devices and supporting pay-per-use models</p> <p><strong>Self-service and convenient</strong></p> <p>ELB supports self-service application within several minutes, without administrator intervention, supporting flexible configuration of a variety of forwarding strategies, advanced custom forwarding control</p> <p><strong>Security Regulation</strong></p> <p>Classic Intranet ELB Instances are subordinated to a certain type (DMZ/SF/PTR) network domain VPC, and cannot render public network ELB services for the Internet oriented business before it is linked to the Internet Gateway (IGW); therefore, its architecture is much more secure, and its deployment construction complies with financial security codes.</p>

Application scenarios

<p><img src="https://obs-cn-shanghai.yun.pingan.com/pacloud/20180601184259-150f79e49717.png" style="height:581px; width:882px" /></p> <p><strong>About the application scenario</strong></p> <p>ELB Instances provide the service IP address as a uniform interface for client access. Each ELB Instance can be configured with multiple listeners to provide multi-port listening services for the same service IP address. Each listener can be configured with a specific server resource pool, and you can also designate the same server resource pool for multiple listeners.&nbsp;</p>

Terms and Descriptions

<table border="1" cellpadding="0" cellspacing="0" style="width:0px"> <tbody> <tr> <td> <p>Term</p> </td> <td> <p>Description</p> </td> </tr> <tr> <td> <p>Elastic Load Balancing</p> </td> <td> <p>A network load balancing service provided by Ping An Cloud for customers, providing a unified access interface for computing node clusters formed by ECS Instances; mainly providing TCP, HTTP and HTTPS load balancing services.</p> </td> </tr> <tr> <td> <p>Load Balance Instance</p> </td> <td> <p>The actual carrier of ELB services; users create ELB Instances and configure them to deploy ELB services.</p> </td> </tr> <tr> <td> <p>Listener</p> </td> <td> <p>A key function of ELB Instance is providing listening ports, protocols, ELB algorithms, health checks, and server resource pool configuration; the operation of ELB services mainly depends on the user&#39;s creation and configuration of the listener.</p> </td> </tr> <tr> <td> <p>Server Resource Pool</p> </td> <td> <p>Computing resource clusters that provide some kind of Internet service form a server resource pool. The ELB service provides a uniform access interface to the Internet client, and then distributes the traffic accessed by the client to the member servers in the server resource pool through the ELB algorithm, so as to achieve ELB.</p> </td> </tr> <tr> <td> <p>Service IP Address</p> </td> <td> <p>An ELB Instance notifies the network where the client resides of the unified access interface by releasing the service IP address externally.&nbsp;</p> </td> </tr> <tr> <td> <p>SSL Certificate</p> </td> <td> <p>When creating an HTTPS protocol, users upload the SSL certificate by themselves and use the certificate for security verification.&nbsp;</p> </td> </tr> </tbody> </table>
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