machine. If the real situation is like this, it is understandable to do so. What if the situation is not so? The physical performance and configuration of each slave is not the same, and the use of random load balancing, regardless of performance, is very unscientific, which can bring unnecessary high loads to machines with poor machine performance, even the risk of downtime, while high-performance databas
includes random load balancing and weighted load balancing. A random Server Load balancer is easy to understand, that is, a random Server Load balancer instance is selected from N Server Load
-RCV-hop-for-Resp
!
SLB virtual-server DNS-dianxin 192.168.10.16
Extended-Stats
Port 53 UDP
Gslb-enable
Use-RCV-hop-for-Resp
!
SLB virtual-server dns_liw.g 192.168.10.18
Extended-Stats
Port 53 UDP
Gslb-enable
Use-RCV-hop-for-Resp
In a multi-link environment, enable the source/output function in port53 UDP.
Use-RCV-hop-for-resplserver mode vs. proxymode
Apache self-built Server Load balancer cluster function recorded by: xuanfei
I have searched the internet and found that it seems that I seldom talk about the functions of the mod_proxy module. So today I am going to learn how to buy it. Let's talk about the versions earlier than apache2.2, I have more information about the internet. I 'd like to say a few simple words below :)
The following example uses t
Generally, Server Load balancer distributes client requests to various real backend servers to achieve Server Load balancer. Another method is to use two servers, one as the master server and the other as the hot standby. All requests are distributed to the master server, sw
irqbalance, this thing in the case of small load, is a very good service, his main function is reasonable to deploy the use of each CPU core, especially for the current mainstream multi-core CPU, Simply put, the pressure can be evenly distributed to the core of each CPU, to improve the performance of a lot of help. [[Email protected] ~]# service irqbalance statusirqbalance (PID 21745) is running ... [Emai
, a Slave is assigned through a load balancing policy. The main research direction of our load balancer is the load distribution strategy, where load balancing typically includes random load balancing and weighted
distribution strategy, where load balancing typically includes random load balancing and weighted load balancing. Random load balancing It is well understood that a slave is randomly selected from n slave. Such random load balancing does not take into account machine perfor
direction of our load balancer is the load distribution strategy, where load balancing typically includes random load balancing and weighted load balancing. Random load balancing It is
log cannot be written to the problem that eventually causes the entire application to crash.3. Logging to logging server you can use a logging software, such as a syslog, to write all the logs to a central server. Although this method requires more configuration, he also provides the most robust solution.
PHP Load Balancer Instance
If you want to
, you can also consider suchTechnology: Use a proxy server to evenly forward requests to multiple servers to achieve load balancing.
3. address translation gateway Server Load balancer supports the address translation gateway of Server Load
is expressed by the weight. "Loadfactor" indicates the backend server's weight for processing load requests and response bytes. the default value is 1. you can set this value to any value ranging from 1 to 100. Load balancing is performed according to the above configuration. suppose Apache receives http://myserver/aaa Request: forward the request to the backend server. if the BalancerMember is http: // ww
server, an endless loop will occur.
How can this problem be solved? Because port 80 is already used to listen for server load balancer processing, the server cannot use port 80 to process a.com access requests. a new one is required. Therefore, we add the nginx. conf of the master server to the following code:
Server {Listen 8080;Server_name a.com;Index index.ht
Author: road ahead
Source: http://www.blogjava.net/carter0618/archive/2007/10/16/153131.htmlload balancing
A large number of links to the Server Load balancer documentation are collected here for future use.
Server Load balancer technology shenghuafen
Cluster
Address: http://www.agilesharp.com/u/yanyangtian/Blog.aspx/t-196
Detailed explanation of IIS Server Load balancer-Application Request Route Article 1: ARR Introduction
Speaking of Server Load balancer, I believe everyone is no stranger. This series mainly introduces the Server Lo
After multiple tomcat servers are used for load balancing, the tomcat port is not open to the public, so the tomcat server Load balancer can be accessed precisely.
Background:
Use Nginx and two Tomcat servers to achieve load balancing, disable tomcat ports (8080 and 8090)
. Therefore, it is not required for small network services for the time being; in addition, it is similar to Nginx/LVS/HAProxy's Linux-based open-source free server load balancer software, which is implemented at the software level, so the cost is very low.
Currently, the website architecture is generally reasonable and popular: the Web front-end uses Nginx/HAProxy + Keepalived as the
configuration.After changing the configuration, we need to restart the Nginx server, or reload (only let it reload the configuration), so that the changes take effect:Service Nginx ReloadBelow we create a test code that tests whether the access is normal "Note: Must be created in the machine where the PHP-FPM is located":cd/opt/wwwvi index. phpWrite the following code:PHP Echo ' Hello! I am server-b ';Then use the browser of other computers to access
Load BalancingMainstream open source software: LVS, keepalived, Haproxy, Nginx and so on;OSI Layer: LVS (4), Nginx (7), Haproxy (4, 7);The Keepalived load balancing function is actually the LVSLVS Load balancer can distribute other ports than 80, such as MySQL, while Nginx only supports HTTP, https, mail;LVS Introducti
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