sticky connections load balancing

consumption of system resources may vary greatly depending on the application. The number of connections does not reflect the actual application load, so when using heavy Webserver as a cluster node service (such as Apacheserver). The algorithm has a discount on the effect of balancing load. In order to reduce this ad

types: ro Roundrobin , which represents a simple pollingSTATIC-RR , which is based on the weightLeastconn , indicating that the minimum number of connections is processed firstSource , which represents the source of the request based IPRI that represents the request based on the URIRl_param that represents the URl parameter according to the requestHDR (name) , which indicates that each HTTP request is locked according to the HTTP request HeaderRdp-c

Three, load Balancing algorithmCommon load balancing algorithms include, polling, random, least link, source address hash, weighting, etc.3.1 PollingDistribute all requests, in turn, to each server, which is appropriate for the same scenario as the server hardware.Advantage: The number of server requests is the same;Di

scheduling: WLC (Weighted Least Connections) "Weighted least-link scheduling" is a superset of "minimum connection scheduling", each service node can use corresponding weights to represent its processing power, and the system administrator can dynamically set the corresponding weights, the default value is 1, The weighted minimum connection schedule is proportional to the number of established connections

to be divided #==== ====controller, Load Balancer controller ========worker.controller.type=lb #server名为controller for load Balancing worker.retries=3# Retry Count worker.controller.balance_workers=tomcat1,tomcat2# Sticky session (default is on) when the attribute value =true (or 1), the session is

Comparison of haproxy lvs nginx Load Balancing For the software that implements load balancing, let's take a look at it in detail. In terms of performance and stability, LVS is the best, basically reaching 60% of the performance of F5 hardware equipment, and other 10% are a little difficult. However, the configuration

interface.Weighted minimum connection (Weighted Least Connection)If the server has different resource capacities, then the "weighted least connections" approach is more appropriate: the number of active connections determined by the administrator's weight based on the server's situation generally provides a very balanced utilization of the server, because it draws on the advantages of the fewest

;　　Worker_rlimit_nofile 51200;　　Events {　　Use epoll;　　# Connections　　Worker_connections 8192;　　}　　HTTP {　　Include mime. types;　　Default_type application/octet-stream;　　Server_names_hash_bucket_size 128;　　# Access_log off;　　# Access_log logs/access. log;　　# Cache time (you can set different times based on different files)　　# Expires 2 h;　　Tcp_nodelay on;　　Keepalive_timeout 30;　　Gzip on;　　Gzip_min_length 10;　　Gzip_buffers 4 8 K;　　Gzip_http_version 1.1;　

One of Linux load Balancing software LVS (concept article) A brief introduction of LVSLVS is the short name of Linux virtual server, the Linux VM, a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now that LVS is already part of the Linux standard kernel, Before the Linux2.4 kernel, the use of LVS must be recompiled to support the LVS function module

configuration:Add the following to the "De.javakaffee.web.msm.MemcachedBackupSessionManager"Memcachednodes="n1:127.0.0.1:11011"Sticky="false"Sessionbackupasync="false"Failovernodes=""Sessionbackuptimeout="100000"Lockingmode="uripattern:/path1|/path2"Requesturiignorepattern=".*\. (ICO|PNG|GIF|JPG|CSS|JS) $"Transcoderfactoryclass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"/>After the above configuration, reboot Tomcat.Refe

======================================= F5 Full Name: F5-BIG-IP-GTM Global traffic manager. is a company called F5 Networks development of the four-seven-layer switch, hardware and software bundles. It is said to have originally used BSD systems, which are now Linux; hardware is Intel's PC architecture, plus the surrounding network and dedicated acceleration devices. Of course, to mention the price, are hundreds of thousands of RMB worth. This baby is the device that is used to manage the d

speed of static Web pages. However, it is also possible to consider such aTechnology, using a proxy server to forward the request evenly to multiple servers, so as to achieve load balancing purposes. 3. Address translation Gateway load Balancing supports a load-balanced add

Nginx load balancing-Overall architectureNginx Version: 1.9.1My blog: http://blog.csdn.net/zhangskdThe Load Balancer module currently available in Nginx:Ngx_http_upstream_round_robin, weighted polling, an equalization request, is the default HTTP load balancing algorithm, in

First, HAProxyHardware-based load balancing devices: F5,BIG-IP, etc.Software-based load balancing products: Haproxy,lvs,nginx, etc.In the software load balancing product, it is divided into system-based soft

Load Balancing with HaproxyFirst, the conceptHaproxy is a free and open source software written in the C language [1] that provides high availability, load balancing, and application proxies based on TCP and HTTP.Haproxy is especially useful for Web sites that are heavily loaded, and often require session-hold or seven

interface.Weighted minimum connection (Weighted Least Connection)If the server has different resource capacities, then the "weighted least connections" approach is more appropriate: the number of active connections determined by the administrator's weight based on the server's situation generally provides a very balanced utilization of the server, because it draws on the advantages of the fewest

Address edit box, type the static IP address that you want the cluster to designate (in this case, "10.115.223.10"). Click the Add Host button and you will soon be prompted to successfully create the host record (4).iv. Installing configuration NLB on Node 1Once you have prepared your preparations, you can install the NLB cluster. For two nodes, it is possible to install a configuration NLB cluster on which node first. Below we will install the configuration on Node 1.On the Desktop of Node 1,

will be the request for this service IP all directed to Dr, and Dr received the packet according to the scheduling algorithm, to find the corresponding realserver, Change the destination MAC address to Realserver's Mac and send it to this realserver? At this point, the Realserver receives this packet, it is equal to receive the packet directly from the client, the processing is returned to the client directly? Because Dr wants to change the two-layer header, So the DR and Realserver must be in

Reverse proxy Server features: Web caching (acceleration), reverse proxy, content routing (forwarding requests to a specific server based on traffic and content type, etc.), transcodingCache: Reduce redundant content transmission, save bandwidth, alleviate network bottleneck, reduce the request pressure on the original server, reduce the transmission delay, public cache everyone can use, private cache with sensitive data only for the qualification of a class or a person to useNginx can implement

efficiency, for each proxy, the proxy server must maintain two connections, one external connection and one internal connection, therefore, the load on the proxy server is very large for extremely high connection requests. The reverse proxy can execute the load balancing policy optimized for the application protocol,