cashier balancing

When developing large network applications, sometimes a server cannot meet the requirements of the client. In this case, you can only add servers to solve the problem, that is, use multiple servers to balance the network load. By using network load balancing, multiple servers are published to the network with one IP address, which is similar to a server, if one or more servers in the network load balancing

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 load balancing. For example, wh

Understanding of Nginx Load BalancingNginx is a lightweight, high-performance webserver, he can mainly do the following two things:As an HTTP server (as with Apache)Load balancing as a reverse proxy serverNow Nginx everywhere can be seen, often see the page after the outage will show Nginx words, which also shows that nginx because of high performance, use configuration simple, open source single These features are more and more users accept, used.One

backgroundIn the previous article: Storm's basic framework analysisIt basically explores Storm's: Worker, executor, and other components of the relationship. Threading models and messaging systems. Task assignment process. Topology the process of submission to execution. However, the relationship between Nimbus, supervisor, parallelism, task allocation and load balancing is not clearly explained, and there are some flaws in t

Load balancing and failover 1, mission objectivesThis task is to solve the server load balancing and failover, this load balancing is to achieve a true sense of load balancing, the actual use, according to the server's various performance indicators for task allocation, in order to achieve fast response, experience hig

greatly affected. Because the picture is on the physical hard disk, access to the picture requires frequent I/O operations, so when the number of concurrent users is more and more, I/O operations will become the overall system performance bottlenecks. This time we will consider the image information distributed storage. Here is an idea for a medium sized business web site for a distributed dynamic storage of picture data and a load-balancing sol

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-tier processing. The haproxy runs on the current hardware and can support tens of thousan

The first time I saw this headline I was surprised that Apache can still do load balancing? It's so powerful. After a survey found that it can, and the function is not bad. This is thanks to the Mod_proxy module. Is worthy of the mighty Apache AH. Less nonsense, the following is to explain the load balancing method of setting. In general, load balancing is the

"How the border routers implement Network Load Balancing," we need to understand several relevant knowledge points about NAT, border routers, and Network Load Balancing. The primary purpose of network address translation (NAT) is to resolve IP address shortages, and to achieve TCP load balancing, in the design shown in Figure 1, Internet-connected routers adopt

Preface:At present, many Web applications, or Web interfaces, will be at the entrance of the server, using a server container to listen to the port, and then make request forwarding, such as Nginx Apache. Server containers are critical to the entire Web service, including the ability to manage service processes, perform proxies, pre-process requests, and load balance. The focus of today's discussion is to make more meaningful load balancing in a serve

Recently in the learning database of read-write separation and master-slave replication, the use of a master multi-slave strategy, using polling method, read the contents from the database. However, if a certain station from the database down, and the client does not know, each round to choose this from the database, do not have to error? Online access to the information, found a good blog post, not only the solution, but also detailed about the database partition, sub-table, cluster and load

How to use HAProxy to Set up MySQL Load balancing Dec 2, MySQL, Scaling, Server optimization Ubuntu, Debian PreludeHAProxy is an open source software which can load balance HTTP and TCP servers. In the previous article on HAPROXY we configured load balancing for HTTP and in this one we'll do the same for MySQL. All your MySQL servers has to is configured to perform master-master replication as load

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 algorithm according to the state of the server, such as through monitoring can get average response time, or CPU occupancy rate, Memor

of security, reliability, and load balancing capabilities. Cisco's innovative DHCP address allocation scheme CNR (Cisco Network Register) it can effectively solve the above problems and support other services such as TFTP and DNS ｡ 1) distributed design of DHCP Server Cisco D Two Cisco dhcp cnr servers are deployed on the two core Switches of the network. The two DHCP servers are connected through dual NICs. In addition, the hcp cnr Server can achiev

Haproxy achieves load balancing and dynamic/static Separation After haprxy Server Load balancer and dynamic/static separation, haproxy is more professional in these two aspects than nginx, including session persistence, cookie guidance, and url monitoring backend, mysql Server Load balancer is not available in nginx, but it cannot be said that haprox can replace nginx, and nginx cache is not available in proxy. Next we will use haproxy to do some basi

General scenarios and application scenarios of load balancing in summaryPolling schedulingTo request scheduling different servers in order of polling; When implemented, the server is generally weighted; this has two benefits: Performance differences for servers can be assigned different loads; When a node needs to be removed, it is only necessary to set its weight to 0; Advantages: Simple and efficient, easy to expand horizontally;Di

Nginx InstallationNginx is a lightweight Web server/reverse proxy server and e-mail (IMAP/POP3) proxy server, and is distributed under a bsd-like protocol. Developed by the Russian program designer Igor Sysoev, it is used by Russia's large portal and search engine Rambler (Russian: Рамблер). Its features are less memory, concurrency is strong, in fact, Nginx's concurrency ability indeed in the same type of Web server performance better, the Chinese mainland Use Nginx website users: Baidu, Sina,

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 and soft load based on the third application implementation.Haproxy compared to the use of LVS is much simpler, the function is also very rich. Currently, Haproxy supports two mai

In order to improve the export bandwidth, many enterprises have applied for broadband multi-line access. However, in actual use, not to apply for more than one line, you can immediately realize the superposition of bandwidth and load balancing. Multi-line bandwidth overlay and line equalization, but also need technical means to implement. In short, multi-line load balancing requires at least the following b

Server load balancer (SLB) has a high score. four web servers use server load balancer. four db servers also use server load balancer. I want to write something to check whether the eight servers connected to the two server load balancer can be connected, sometimes one or two servers are down but I don't know, so I want to write something for manual detection. your server load balancer technology also solves high load balancing problems by itself. Fou