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These cookies are on by default for visitors outside the UK and EEA. To costeffectively scale to meet these high volumes, modern computing best practice generally requires adding more servers. If a single server goes down, the load balancer redirects traffic to the remaining online servers. When a new server is added to the server group, the load balancer automatically starts to send requests to it. The relative computing capacity of each server is factored into determining which one has the least connections. NGINX Plus can optionally apply a consistent hash to minimize redistribution of loads if the set of upstream servers changes. Changing which server receives requests from that client in the middle of the shopping session can cause performance issues or outright transaction failure. In such cases, it is essential that all requests from a client are sent to the same server for the duration of the session. Another use case for session persistence is when an upstream server stores information requested by a user in its cache to boost performance. Switching servers would cause that information to be fetched for the second time, creating performance inefficiencies. This is common in environments such as the Amazon Web Services (AWS) Elastic Compute Cloud (EC2), which enables users to pay only for the computing capacity they actually use, while at the same time ensuring that capacity scales up in response traffic spikes. In such environments it greatly helps if the load balancer can dynamically add or remove servers from the group without interrupting existing connections. How F5 Load Balancer Works Software Onto TheVendors of hardwarebased solutions load proprietary software onto the machine they provide, which often uses specialized processors. To cope with increasing traffic at your website, you have to buy more or bigger machines from the vendor. Software solutions generally run on commodity hardware, making them less expensive and more flexible. How F5 Load Balancer Works Install The SoftwareYou can install the software on the hardware of your choice or in cloud environments like AWS EC2. Layer 7 load balancing enables the load balancer to make smarter loadbalancing decisions, and to apply optimizations and changes to the content. More than 400 million websites worldwide rely on NGINX Plus and NGINX to deliver their content quickly, reliably, and securely. The comprehensive load balancing capabilities in NGINX Plus enable you to build a highly optimized application delivery network. NGINX Plus helps you maximize both customer satisfaction and the return on your IT investments.
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