1. Random algorithm:the load balancing method randomly assigns the load to each available server, selects a server by the random number generation algorithm, and sends the connection to it. the same request will fall to machine A, a will fall on machine B, the cache will be frequently eliminated, so that the cache hit rate is low. 2. Polling algorithm:The polling
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
Basic load balancingAlgorithm, Mainly including the following (refer to F5 products ):
Random: The Load Balancing Method Randomly distributes the load to each available server, selects a server through the random number generation algorithm, and sends the connection
server list is not changed.4. Weighted round-robin methodDifferent back-end servers may not have the same machine configuration and current system load, so they have varying compression capabilities. Configure a high, low-load machine with higher weights to handle more requests, and configure low, high-load machines, assign them lower weights, lower their system
Load balancing, the cluster must be mastered, the following describes several algorithms of load balancing.1, polling, that is, all requests are distributed once on the server, each server processing requests are the same, suitable for the same computer hardware.2. Weighted
The main load balancing algorithms are useful in Nginx, the following article on these algorithms introduced in more detail, please refer to.
http://baidutech.blog.51cto.com/4114344/1033718
The paper mentions several common software load
: #ipvsadm -a -t 172.16 .100 .1 : 80 -r 192.168 .10 .9 -m 5. View-L|l[options]-n:数字格式显示主机地址和port号--stats:统计信息--rate:速率--timeout:显示tcp、tcpfin和udp会话的超时时间值--daemon--sort:跟协议、地址、port进行排序,默觉得升序-c:显示当前ipvs连接状况6. Remove all cluster Services: -C:清空ipvs规则7. Save the Rules-S:(用输出重定向进行保存)格式:`#ipvsadm -s >/path/to/somefile`8. Load the previous rule:-R格式:`#ipvsadm -R View Original
Original works, agreed to reprint, please be sure to use hyperl
ip)每个请求按访问ip的hash结果分配,这样每个访客固定访问一个后端服务器,可以解决session的问题。Upstream favresin{Ip_hash;Server 10.0.0.10:8080;Server 10.0.0.11:8080;}fair(第三方)按后端服务器的响应时间来分配请求,响应时间短的优先分配。与weight分配策略类似。Upstream favresin{Server 10.0.0.10:8080;Server 10.0.0.11:8080;Fair}Url_hash (third Party)Assign requests by the hash result of the access URL so that each URL is directed to the same back-end server, which is more efficient when the backend server is cached.Note: In upstream the hash statement is added, the server stateme
Load balancing, the cluster must be mastered, the following describes several algorithms of load balancing.1, polling, that is, all requests are distributed once on the server, each server processing requests are the same, suitable for the same computer hardware.2. Weighted
I. SummaryAs the system becomes larger and more complex, the system architecture is developed from the original single system to the vertical system to the present distributed system. In the distributed system, the public service module can be high availability, high fault tolerance, high scalability, however, when the system becomes more and more complex, things need to be considered more and more naturally, the requirements are more and more high, such as service routing,
[Article Zhang Feast this article version: v1.0 last modified: 2008.05.22 reproduced Please specify from: HTTP://BLOG.S135.COM/F5_BIG_IP]In the recent comparison of testing the performance of F5 big-IP and Citrix NetScaler load balancers, write this article to document the common application configuration methods for F5 big-IP.Currently, many vendors have launche
F5 BIG-IP Server Load balancer configuration instance and Web Management Interface experience [original] Big | medium | small [| by banquet] [Author: Zhang banquet this article version: V1.0 last modified: for more information, see http://blog.s135.com/f5_big_ip].
Recently, the performance of F5 BIG-IP and Citrix NetScaler L
Reprint: http://www.zyan.cc/f5_big_ip/In the recent comparison of testing the performance of F5 big-IP and Citrix NetScaler load balancers, write this article to document the common application configuration methods for F5 big-IP.Currently, many vendors have launched a load balancer dedicated to
(application layer) load balancing. 8) DNS Response equalization (Flash DNS): On the Internet, whether it is HTTP, FTP or other service requests, the client is usually through the domain name resolution to find the exact IP address of the server. Under this equalization algorithm, the load balancer device in different geographic locations receives the domain nam
exact IP address of the server. Under this equalization algorithm, the load balancer device in different geographic locations receives the domain name resolution request from the same client and resolves the domain name to the IP address of the corresponding server (that is, the IP address of the server with the load balancer in the same location) and returns it to the client at the same time. The client w
Based on the huge network structure, the use of Cluster Server brings a lot of load problems such as traffic. So the relative, load-balanced technology also emerged. Each technology requires product support, so let's now look at one of the F5 load balancers. So first of all, we first introduce the structure of the prod
Based on the huge network structure, the use of cluster servers brings a lot of traffic and other load problems. In contrast, Server Load balancer technology has also emerged. Every technology requires Product Support. Now let's get to know one of F5 Server Load balancer. First, we will introduce the structure and func
feature is richer and more flexible, and makes the entire network smarter. As shown, the connections on both sides of the seven-tier load balancer (client-side and server-side) are independent.3. In short, four-tier load balancing is based on the ip+ port. Seven-tier load balancin
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