云计算中的负载均衡是什么？

Load balancing may also be referred to as traffic dispatching since it works as a traffic director for websites and applications. It disperses the user traffic to different servers to avoid subjecting a particular server to excessive traffic load, to ensure smooth performance and prevent crashes.

负载均衡在以下方面至关重要 云环境 和SaaS应用程序中，因为那里的资源是虚拟的，有时可能会因流量过载。它可以确保：

• 高可用性： 如果一台服务器宕机，流量会自动重定向到其他功能正常的服务器。
• 性能： 在同时接收多个请求时，保持应用程序的响应。
• 可扩展性： 向池中添加更多服务器以处理不断增长的流量。

请记住： 所有服务器协同工作，同时处理总工作负载，以提高所提供产品或服务的可用性。

Real-world examples: Streaming platforms such as Netflix employ load balancing to deliver a seamless flow of videos to millions of users at once.

Think of it like shopping in a busy supermarket where instead of everybody queueing up at one counter, several counters are opened to divide the load. Load balancers function similarly; they distribute the current incoming requests to the least loaded server.

Some of the common load balancing techniques include the round-robin, least connections, and IP hash, each with its advantages and use cases.

请记住： Load balancers may also take into account the health of the servers, response time, or geographical location of the servers.

Here are three differences: 

• 可扩展性： The capability to increase or decrease resources (like servers) and manage different traffic levels.
• Load Balancing: 这是将流量分配到可用资源上的行为。
• 云弹性： 包括基于流量自动扩展资源，以及可扩展性和负载分配的集成。

负载均衡广泛应用于 SaaS 应用程序中，以提高用户满意度和服务的可用性。例如：

• Microsoft Office 365: Balances traffic from millions of users accessing emails, documents, and other services.
• Zoom视频会议： 将视频或音频流量分配到多个服务器，以保持通信质量。
• Salesforce CRM： 平衡客户关系管理数据和交易量，以提高响应速度或为以下对象提供可用性 销售团队.