system expansion capability.
More than two servers to work together must involve load balancing problem, the current commonly used load balancing technology are: NAT load balancing, reverse proxy
The size of the internet increases by one times every 100 days, and customers want to get 7 days and 24 hours of uninterrupted availability and faster system response times, rather than repeatedly seeing a site "ServerToo Busy "and frequent system failures.
With the increase of traffic volume and the rapid growth of traffic volume and data flow, the processing capacity and calculation intensity of the network are increased, which makes the single equipment unable to bear. In this case, if you th
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
Load balancing is an eternal topic for a large web site. With the rapid development of hardware technology, more and more load balancing hardware devices emerge, such as F5 Big-ip, Citrix netscaler, Radware, etc., although it can solve the problem, but its high price is often prohibitive, So
Here are the configuration for Apache load balancer and reverse proxyChoose Apache HTTP Server as the front-end load server, the backend select two tomcat for the cluster, this choice is configured in session Sticky (sticky session), this way to forward the same user's request to a specific Tomcat server, Avoid the rep
This blog reposted from: http://blog.csdn.net/u014649204/article/details/25115039
The design of the balancing algorithm directly determines the performance of the cluster in load balancing. Poor design of the algorithm will lead to load imbalance in the cluster. The main task of the general
1 causeRecently, a stress test was conducted on the newly developed web system, and it was found that the response speed of concurrent logon home pages under tomcat's default configuration pressure to 600 people was severely affected, more than 2000 errors of 500 and 502 occur in one round. I made a look at the logon time statistics and printed out the total server processing time. I saw that some responses were indeed within 20 seconds, however, the average time is far from the lr test. Therefo
capability. First, increase the number of tomcat threads to 1000, and find that the number of errors 500 and 502 has dropped to dozens, but the response time has not improved yet. Later, two tomcat servers were started, and nginx was used for load balancing. the response time dropped by 40%. the processing duration of the two tomcat servers was kept at about 1 second.It seems that tomcat performance is ind
Objective:
With the explosive growth of Internet information, load balancing (loading balance) is no longer a very unfamiliar topic, as the name implies, load balance is to spread the load to different service units, not only to ensure the availability of services, but also to ensure that the response fast enough to g
1. Cluster 1.1 definition:is a set of independent computer systems that form a loosely coupled multiprocessor system that communicates between processes over a network. Applications can deliver messages over network shared memory for distributed computers.is a group of connected computers, from the outside it is a system, each node can be a different operating system or computer composed of different hardware. A cluster that provides Web services is a large Web server to the outside world. Howev
Disclaimer: This article is reproduced.When a server (including Web servers, FTP servers, or streaming media servers, etc.) is put into the network, as the number of clients increases, people often need servers that are more powerful and processing faster. To solve this problem, it is obviously not a good idea to replace the original server with a more powerful, faster server. But if you can add a new server to the processing power of the original server instead of replacing it, this scheme is u
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Article, where the information may have evolved or changed.
Section Seventh: Service Discovery and load balancing
Original address
Reprint please specify the original and translation address
This article will focus on the important parts of the two microservices architectures: Service discovery and load
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
Apache.This article is mainly about Nginx + Tomcat reverse proxy and load balancing deployment, to popular and practical-oriented. This article does not have much to do with each section and can be studied separately according to the requirements.Come down and look at the process of Nginx reverse proxy:Nginx Load Balancing
/images.confserver { listen 8080; server_name nginx.bgx.com; location / { root /code; index index.html; }}2.Nginx Load BalancingWebServer, direct user-oriented, often to be hosted 大量并发请求 , a single server 难以负荷 , I use a number of servers, the WEB front- 集群 End use Nginx``负载均衡 , will be requested 分散 to hit our back-end server cluster, implementation 负载的分发 . Then it will greatly improve the system吞吐率、请求性能、高容灾2.1Nginx
Server cluster with a balanced policy Nowadays, servers must be able to provide a large number of concurrent access services, and their processing and I/O capabilities have become bottlenecks in service provision. If the customer's increase causes the communication volume to exceed the capacity of the server, the result will inevitably be: downtime. Obviously, the limited performance of a single server cannot solve this problem. The processing capacity of a common server can only reach tens of
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
Source: Network Collection
In general, load balancing is the client's request to the backend of the various real servers to achieve load balancing purposes. There is another way is to use two servers, one as the primary server (master), the other as a hot Standby, the request is all to the primary server, when the pr
To improve server performance and workload, enterprises usually use DNS servers, network address translation, and other technologies to achieve multi-server load balancing, many of them use several servers to achieve Load Balancing for server access.
Currently, the so-called "Server
CEF (Cisco Express Exchange) detailedCEF Load BalancingOne, the destination-based balance of responsibility:Destination-based load balancing allows routers to use multiple paths to balance the load. For a source/target host, packet forwarding takes the same path, which is handled even if multiple paths are available. D
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