nginx的反向代理和负载均衡的区别是什么

最近在研究nginx的负载均衡和反向代理，先看下这两个简单的配置吧！

负载均衡

				
								01
							
								worker_processes 1; 
						
								02
							
								events { 
						
								03
							
								   worker_connections 1024; 
						
								04
							
								} 
						
								05
							
								http{ 
						
								06
							
								    upstream lxx {//默认是80端口 
						
								07
							
								        server 192.168.0.62 weight=2; 
						
								08
							
								        server 192.168.0.161 weight=3; 
						
								09
							
								    } 
						
								10
							
								    server { 
						
								11
							
								        listen 80; 
						
								12
							
								        location / { 
						
								13
							
								            proxy_pass http://lxx; 
						
								14
							
								        } 
						
								15
							
								    } 
						
								16
							
								}

反向代理

				
								01
							
								worker_processes 1; 
						
								02
							
								events { 
						
								03
							
								   worker_connections 1024; 
						
								04
							
								} 
						
								05
							
								http{ 
						
								06
							
								    upstream lxx {//默认是80端口 
						
								07
							
								        server 192.168.0.62 weight=2; 
						
								08
							
								        server 192.168.0.161 weight=3; 
						
								09
							
								    } 
						
								10
							
								    server { 
						
								11
							
								        listen 80; 
						
								12
							
								        location / { 
						
								13
							
								            proxy_pass http://lxx; 
						
								14
							
								15
							
								16
							
								            #Proxy Settings 
						
								17
							
								            proxy_redirect     off; 
						
								18
							
								            proxy_set_header   Host             $host; 
						
								19
							
								            proxy_set_header   X-Real-IP        $remote_addr; 
						
								20
							
								            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for; 
						
								21
							
								            proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504; 
						
								22
							
								            proxy_max_temp_file_size 0; 
						
								23
							
								            proxy_connect_timeout      90; 
						
								24
							
								            proxy_send_timeout         90; 
						
								25
							
								            proxy_read_timeout         90; 
						
								26
							
								            proxy_buffer_size          4k; 
						
								27
							
								            proxy_buffers              4 32k; 
						
								28
							
								            proxy_busy_buffers_size    64k; 
						
								29
							
								            proxy_temp_file_write_size 64k; 
						
								30
							
								        } 
						
								31
							
								    } 
						
								32
							
								}

从配置上来看，它只是多了Proxy Settings下面的一些设置参数！但从实际的表现结果来看，感觉区别并不是很大，负载均衡已经可以把用户的请求按照相关算法和规则发送到web集群的某台机器，而反向代理也是实现了如此的功能，它们的具体的区别在哪里？求普及！

(责任编辑：IT)

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nginx的反向代理和负载均衡的区别是什么