sticky load balancing

reproduced from this blog: http://blog.csdn.net/u014649204/article/details/25115039the design of the balance algorithm directly determines the cluster in Load Balancing performance, poorly designed algorithms can lead to unbalanced load on the cluster. The main task of the general balancing algorithm is to decide how t

In actual projects, because of the large number of user visits, often need to open multiple servers at the same time to meet the actual needs. But how do you manage them when you start multiple services at the same time? How to achieve session sharing? Let's talk about how to use Tomcat+nginx to build a server cluster and how to implement session sharing.Environment:APACHE-TOMCAT-6.0.29+APACHE-TOMCAT-6.0.29+JDK1.6+WIN7 (the server system was not used because he had just made a demo,j)1. First we

This article is about the PHP surface test seven of the nginx load balance How to configure, has a certain reference value, now share to everyone, the need for friends can refer to Load Balancing There are 4 modes of load Balancing in Nginx: 1), polling (default)Each reques

Web cluster selection and implementation of load Balancing scheme for service The Web application server cluster system is a cluster system composed of a group of servers running the same Web application at the same time, which looks like a server to the outside world. In order to balance the load of cluster server and to optimize the performance of the system

Http://publish.it168.com/2006/0315/20060315030001.shtml 1. DNS load balancing method The RR-DNS (round-robin Domain Name System) takes turns by: In a DNS server,You can configure the same name for multiple IP addresses. When the client queries this name, it will get an address when parsing this name. Therefore, for the same name, different clients will get differentTo achieve

DNSServerFunction Set-dnsserverstubzone DNSServerFunction set-dnsserverzoneaging DNSServerFunction set-dnsserverzonedelegation DNSServerFunction Show-dnsservercache DNSServerFunction Show-dnsserverkeystorageprovider DNSServerFunction start-dnsserverscavenging DNSServerFunction Start-dnsserverzonetransfer DNSServerFunction Step-dnsserversigningkeyrollover DNSServerFunction Suspend-dnsserverzone DNSServerFunction Sync-dnsserverzone DNSServerFunction Test-dnsserver DNSServerFunction test-dnsserver

Software load Balancing is generally implemented in two ways: the implementation of soft load based on operating system and the implementation of soft load based on third party application. LVS is a kind of soft load based on Linux operating system, Haproxy is an open source

are many things to do. The Nat mode is simple, that is, to change the IP address and port information to the IP address and port of the real balancing machines, so that the real service machines are hidden behind the Load balancer, the idea is the same as that of normal Nat.[Tunnel mode]: The tunnel mode is to repackage data into a new IP data packet, and then send the data to the virtual Nic by modifying

= Request.getparameter ("Dataname");if (dataname! = null dataname.length () > 0) {String DataValue = Request.getparameter ("DataValue");Session.setattribute (Dataname, DataValue);}Out.print ("list Enumeration E = Session.getattributenames ();while (E.hasmoreelements ()) {String name = (string) e.nextelement ();String value = Session.getattribute (name). toString ();OUT.PRINTLN (name + "=" + value+ "SYSTEM.OUT.PRINTLN (name + "=" + value);}%>name : value : Create Web-inf directory, creating Web

, and use the default value set for dfs. replication in the hdfs-site.xml if not specified in the startup command; HDFS Load Balancing HDFS clusters of Hadoop are prone to unbalanced disk utilization between machines. For example, when a node is added or deleted in a cluster, or the hard disk storage of a node is saturated. When the data is not balanced, the Map task may be assigned to a machine that does n

medium and large projects will take into account the distribution, the previous several articles focused on the technical cluster of data processing. Let's look at the load balancing –nginx for servers today. He can also decide to place the request on that service, in addition to the static resource processing. installation of Nginx Point I download the download well, we can directly click to open the serv

Original: http://blog.hesey.net/2013/02/introduce-to-load-balance-and-lvs-briefly.htmlIn large-scale Internet applications, load balancing devices are an essential node, originating from high concurrency and large traffic impact pressures in Internet applications, where we typically deploy multiple stateless application servers and several stateful storage server

. Mode=0 (BALANCE-RR) (Balanced rotation strategy)Link load balancing increases bandwidth, supports fault tolerance, and a link failure automatically switches the normal link. The switch needs to configure the aggregation port, Cisco is called the Port channel.Features: Transmission packet sequence is transmitted sequentially (that is: the 1th packet to go eth0, the next package will go eth1 ...). This mode

Process | solve | problems Environment Description: Development platform is dotnet b/S. NET Framework 1.1 The official web server and test machine are win2003 The original main web site, in six Web servers to do load balancing. Run more stable. A new sub station is now being developed to load balance on another three Web servers. This

Previously built under the Windows environment under the APACHE+TOMCAT load balancing (can not refer to the previous document, the document for Linux and Windows are applicable), smooth sailing, without any problems, today try to build under Linux, which encountered a few problems, Here to share with you. Linux environment, three redhat6.5 x86_64, where 192.168.1.2 install apache,192.168.1.3 and 192.168.1.

three Alteon servers were used.(2) software:Apache is a well-known HTTP server. Its Two-way proxy/reverse proxy function can also achieve the HTTP load balancing function, but its efficiency is not very good. The other haproxy is purely used to handle Server Load balancer and has a simple cache function.In terms of the built-in Server

the load-balancing architecture will be built as follows Engineering descriptionSpring-cloud-02-ribbon-retry Analog customer service, request services, resttemplate+loadbalanced to achieve load balancing Spring-cloud-02-ribbon-eureka as service discovery, manage all services SPRING-CLOUD-02-RIBBON-CLIENT-01/SPRING-CLO

As developers of back-end applications, we often develop, debug, test and publish our applications to the production environment, and users have direct access to our applications. But for Internet applications, there is a low profile or thick or thin layer of load balancing software between your application and users, and they do not show the dew silently playing an important role, so much so that we often

the difference between one or four layer and seven layer load balancing Seven-tier load balancing is based on HTTP protocol, and is suitable for load balancing of Web server. (Nginx) The four-layer