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Nginx sticky module implements session stickiness Nginx sticky module implements session stickiness Note: nginx is installed in the system.1. Download and decompress the nginx sticky module.# Cd/usr/local/src# Wget http://nginx-sticky
/test.jspServer Info:Out.println (REQUEST.GETLOCALADDR () + ":" + request.getlocalport () + "Out.println ("String dataname = Request.getparameter ("Dataname");if (dataname! = null dataname.length () > 0) {String DataValue = Request.getparameter ("DataValue");Session.setattribute (Dataname, DataValue);}Out.print ("Enumeration E = Session.getattributenames ();while (E.hasmoreelements ()) {String name = (string) e.nextelement ();String value = Session.getattribute (name). toString ();OUT.PRINTLN (
Today, the ' large server ' model has been replaced by a large number of small servers, using a variety of load balancing techniques. This is a more feasible approach that minimizes the cost of hardware. The advantages of ' more small servers ' outweigh the past ' large server ' patterns in two ways: 1. If the server goes down, the load balancing system will stop requesting the server to go down and distrib
Windows Azure Platform Family of articles CatalogNote: If Azure is facing a customer that is only an enterprise customer, an enterprise customer accessing the Internet with a NAT device, because multiple clients use the same source IP address, can cause a single server to be under a lot of stress.This feature has been out for some time, the author here to do a little note. Readers familiar with the Azure platform know that the rules for Azure load
pools. Such as: , we click on "Choose an availability set" to select a high-availability set of the previous 2 Web VMS Setup is complete, such as: In part V, we need to set up the load balancer to the backend Web Server Listener (Probe), and the load balancer will not send traffic to this Web server when there is
Source: http://steven2011.iteye.com/blog/1296588 Download: http://httpd.apache.org/(test with version 2.2)Document: http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html Apache2.2 \ conf \ httpd. conf 1. enable the required module (find the corresponding module and uncomment it) Loadmodule proxy_module modules/mod_proxy.soLoadmodule proxy_balancer_module modules/mod_proxy_balancer.soLoadmodule proxy_http_module modules/mod_proxy_http.so # This is used to create a cookie for
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 use load balanc
Tomcat Load balancer (MOD_JK for Apache):1, based on the Apache MOD_JK to achieve:Apache/ \Tom1 Tom2After completing the installation of two tomcat1,tomcat2, it is hoped that the load balance can be achieved, and using MOD_JK can realize the fault recovery function of the node, that is, a node problem, MOD_JK will not participate in the
= localhostWorker. tomcat1.type = ajp13 # Specify the size of the open connection cache.# Worker. tomcat1.cachesize ## Specifies the load balance factor when used# A Load Balancing worker.# Note:# ----> Lbfactor must be> 0# ----> Low lbfactor means less work done by the worker.Worker. tomcat1.lbfactor = 900 #------------------------# Second Tomcat server#------------------------Worker. tomcat1.port = 8009W
debugJkMount/* lb1 // All contents under the Access root are sent to the cluster lb1.JkMount/status/stat1 4. Configure the configuration file workers. properties of the mod_jk module: Vim/etc/httpd/conf. d/workers. properties-------------------------------------------------------->Worker. list = lb1, stat1Worker. TomcatA. type = ajp13 // The mode used by httpd to connect to tomcatWorker. TomcatA. host = 192.168.19.66Worker. TomcatA. port = 8009Worker. TomcatA. lbfactor = 1 // weightWorker. Tomc
cluster system 2004-06-28 x0ne Centralized management of the basic SSL Structure Some Ideas Create a dual-nic Server Load balancer (improving upload and download efficiency) [copy] 2005-12-31 lbyyy Win2003 network load balance 2005-08-21 longrujun Analysis on solving Java server performance problems (group chart) 2005-11-29 renco [Original] Evaluatio
-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 Load service-group in port 53 UDP is the proxy mode, while loa
(HH): select the server based on the HTTP header in the user request message; -Persistent hostname (ph): the server is selected based on the hash value of the hostname in the HTTP header in the user request message; -Persistent URL (PU): the server is selected based on the static correspondence between the URI tag and the value. -SSL session ID (sslsid): select a server based on the SSL session ID. C.
caches can be used in applications, instead of distributed sessions and caches. Here, we use Session as an example, because in many cases, we need to deploy a site application to multiple servers. If Session is used in some places, in particular, distributed sessions are used to save user data. User logon is the most obvious example (to prevent users from logging on from server, when the current request is
disadvantage of Nginx.2. backend server health check only supports Port detection, but does not support url detection. Direct Session persistence is not supported, but can be solved through ip_hash. LVS: implements a high-performance and high-availability server load balancer using Linux kernel clusters. it has good Scalability, Reliability, and Manageability ).
definition block, followed by a space, followed by a port number. Defines a VIP that can implement load balancing on multiple TCP ports.(1) Delay_loop. The health check interval, in seconds.(2) Lb_algo. Load balancing scheduling algorithm, the use of the WLC or RR is often used in Internet applications.(3) Lb_kind. Load-balanced forwarding rules. Generally inclu
, it can load balance almost all applications, including HTTP, databases, and online chat rooms. LVS has the following Disadvantages: 1. software itselfRegular Expression Processing is not supported, and dynamic/static separation cannot be performed.But now many websites have strong requirements in this regard. This is the advantage of nginx/haproxy + keepalived.2. If there are a large number of website applications, the implementation of LVS/DR +
QQ group: 179242260nginx as a server Load balancer Application The load balancing function of nginx is implemented through the upstream command. Therefore, its load balancing mechanism is relatively simple. It is a layer-7 Load Balancing implementation based on content and a
seconds of delay when receiving the response. Network Server Load balancer allocates incoming network communication between one or more virtual IP addresses (cluster IP addresses) assigned to the Network Server Load balancer cluster, resulting in changeable performance. Then, the host in the cluster simultaneously r
. In transparent mode, the Server Load balancer system transmits the IP address of the original client as the source IP address. In non-transparent mode, the Server Load balancer system uses the virtual IP address (VIP) of the Server Load
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