round robin load balancing

according to the load balancing type (active/active, active/standby ,...), the user can only see a single IP Address outside. As for how many servers are there, the user does not need to know (like the concept of cluster and cloud computing ). Figure 1 distributed user vs server farm (Web server farm) Figure 2 the red arrow shows the Failover architecture (HA), which has different functions than

several common scheduling algorithms for load Balancing clusters(1) Polling (Round Robin): The access requests are assigned in sequence to each node in the cluster (real server), equal to each server, regardless of the actual number of connections and system load of the server(2) Weighted polling (Weighted Round

There are several ways to load balance:one, based on the client way:Each client program has a certain knowledge of the server cluster, which in turn sends requests to different servers in a load-balanced manner. This approach is primitive, and now some older systems are still using this approach, and the client simply uses polling to achieve load

Server | network | Conversion SUMMARY: This paper discusses the load balancing technology and load allocation strategy used by distributed network server, and realizes load balancing gateway on FreeBSD based on network address translation, which is applied to our Internet ne

Nginx series ~ Implementation of Server Load balancer and WWW server, nginx Load Balancing The last two lectures are mainly about the Nginx environment, which does not involve the development of the real environment. In this example, describe how to configure Nginx for the Server Load balancer and WWW server and how to

it is mapped by default without any matching conditionsBackend app # define a backend part named appBalance roundrobinServer app1 192.168.3.128: 80 checkServer app2 192.168.3.129: 80 checkStats enable # enable the server status monitoring page After the configuration is complete, restart haproxy. Service haproxy restart 4. Test [Root @ usvr-124 haproxy] # curl 192.168.3.124/1.html Hello, 192.168.3.129 [Root @ usvr-124 haproxy] # curl 192.168.3.124/1.html Hello, 192.168.3.128 From this we can se

1. OverviewThe first two times in this article, we have been talking about the construction of Nginx + keepalived. At the beginning of this article, we are going to honor the promise of the previous article, the following two articles we will introduce the Nginx + keepalived and LVS + keepalived to build a highly available load layer system. If you do not know about Nginx and LVS, see my previous two articles, "Architecture Design:

,ip6t_reject,nf_conntrack_ipv6,nf_defrag_ipv6 Characteristics of LVS Cluster 3.1 IP load balancing and load scheduling algorithm 1. IP Load Balancing TechnologyLoad balancing technology has a number of implementation scenarios,

device in front of the cluster to achieve traffic distribution.Load Balancing (Balance), which means that load (work tasks, access requests) are balanced and distributed across multiple operating units (servers, components) for execution. is the ultimate solution for high-performance, single-point-of-failure (high availability), scalability (horizontal scaling).This article is the first article on

I. Introduction of LVSLVS is the short name of Linux virtual server, which is 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, the LVS must be recompiled to support the LVS function module before the Linux2.4 kernel is used. However, since the Linux2.4 kernel, the various functions of LVS have been built-in, without any patches to the kernel, which can be directly used by LVs .lv

load balancingWe know that the role of load balancer in load balancing devices is crucial, and it plays a connecting role. On the one hand, receives the user's network request, on the other hand transfers the request according to some algorithm to the specific application server, realizes the

with Apache + mod_jk + Tomcat to achieve Tomcat The load balancing of the clusterIf there is a problem, you can use the CMD CD in the Apache installation file under the bin, run the httpd file, the error message will be printed out.The problem I have here is that the Include conf/mod_jk.conf cannot load the configuration file (this is the problem in English trans

Nginx reverse proxy, load balancing, and nginx reverse load1What is reverse proxy and reverse proxy? 1.1 Forward proxy 1.2 Reverse Proxy 1.2 Use Nginx implements reverse proxy Nginx only forwards requests. There are multiple http servers in the background to provide services. The nginx function is to forward requests to the backend servers and decide who to forward the requests. 1.2.1 Install tomcat Create

module at startup. the external virtual network interface device is bond0. Add the following two lines: alias bond0 bonding Options bond0 mode = 0 miimon = 250 use_carrier = 1 updelay = 500 downdelay = 500 Note: miimon is used for link monitoring. For example: miimon = 100, the system monitors the link connection status every MS. If one line fails, it is transferred to another line. The value of mode indicates the working mode, which has a total, 2, 3 and other four modes, commonly used for 0,

Absrtact: This paper discusses the load balancing technology used in distributed network server and the strategy of load distribution, and realizes the load balance gateway on FreeBSD based on network address translation, which is applied to our Internet network server and distributes the

Load balancing algorithms can be divided into two categories: Static load Balancing algorithm, server-based capacity, is a high-configuration server than the low-provisioned server to allocate more requests, dynamic load balancing

Transferred from: https://www.cnblogs.com/xrq730/p/5154340.htmlWhat is load balancingLoad balancing, the English name is load Balance, refers to the multiple servers in a symmetric way to form a collection of servers, each server has an equivalent status, can be provided separately from external services without the assistance of other servers. With a

LVS Reference: http://zh.linuxvirtualserver.org/ Several terms:Director: Also known as scheduler, LVS front-end device; RealServer: a real internal server is actually providing services; VIP: The public IP address, that is, the IP Address requested by the customer; Dip: the address for communication between the scheduler and the RealServer;LVS has three working modes: LVS implements Server Cluster load balancing