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Session retention is one of the most common problems in load balancing and is a relatively complex issue.Session hold is sometimes called sticky session (Sticky Sessions).Before we introduce session-keeping techniques, we have to take some time to figure out the concepts: wh
each node, but for the application server, due to the existence of session, A better way is to distribute requests from the same session to the same node for processing. This is called sticky session load balancing, the former is called non-sticky
HTTPD load Balancing Tomcat implements the session sticky and session cluster architecture as follows:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/88/6C/wKioL1f3ajTxPkM9AADT2sKTejY987.png "title=" Session frame composition. png "alt=" Wkiol1f3ajtxpkm9aadt2sktejy987.png "/>The implementation process is as
When you use load balancing, you will experience session retention problems, which are commonly used in the following ways:1.IP Hash, assigning requests to different servers based on the IP of the client2.cookie, the server sends a cookie to the client, and a request with a specific cookie is assigned to its publisherNote: Cookies require browser support and sometimes reveal data 1.Sticky Working principle:
The cookie differs from the session, one on the client and one on the server.Environment Nginx 1.8.0Centos6. Xsticky:1.2.5 wget https://bitbucket.org/nginx-goodies/nginx-sticky-module-ng/get/master.tar.gzCookie load balancing is more obvious than iphash compared to one of the features: the Equalization of the intranet NAT user. And Iphash can't do it.Yum Install OpenSSL Openssl-develStop the Nginx service f
Nginx Sticky session is mainly realized by Nginx-sticky-module1 downloads nginx-sticky-module: https://code.google.com/p/nginx-sticky-module/downloads/listOfficial Document: Https://code.google.com/p/nginx-sticky-module/wiki/Docum
;Events {Worker_connections 1024;}HTTP {Include Mime.types;Default_type Application/octet-stream;Log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '' $status $body _bytes_sent ' $http _referer '' "$http _user_agent" "$http _x_forwarded_for";Sendfile on;Keepalive_timeout 65;Map $cookie _jsessionid $route _cookie {~.+\. (? p}Map $request _uri $route _uri {~jsessionid=.+\. (? p}Upstream Jiracluster {Server 10.32.115.91:8090;Server 10.32.115.92:8090;
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
-http_flv_module--with-http_mp4_module--http-client-body-temp-path=/var/tmp/nginx/ client--http-proxy-temp-path=/var/tmp/nginx/proxy--http-fastcgi-temp-path=/var/tmp/nginx/ Fastcgi--http-uwsgi-temp-path=/var/tmp/nginx/uwsgi--add-module=. /nginx-sticky-module-1.1Make make installNote: If you need to turn onSticky sessionfunction, need to add the above red this sentence,nginx-sticky-module-1.1where the modul
Our product has two module, deployed on separate Linux machine, module 1 need to launch HTTP request to Module 2 to obtain service. Since Module 2 has multiple units, we will deploy a load balancer (elb,elastic load Balancer) before Module 2. We're deployed in AWS, so we're using AWS ELB. AWS Elb also provides another good feature, called the Sticky Session, which is to help you direct requests to one of
Version information: The linux:red Hat Enterprise Linux Server>nginx_upstream_jvm_route is a nginx extension module that implements the function of the Cookie-based session Sticky ( Written by the Chinese). Principle of Jvm_route (from author Weibin Yao): 1. At the beginning of the request came, without the session information, Jvm_route on the basis of round> -
Apache HTTP Server is selected as the front-end Server Load balancer, and two Tomcat clusters are selected at the backend. The selected configuration method is session sticky (sticky session ), this method forwards requests from the same user to a specific Tomcat server to avoid se
time is short of priority allocation. upstream Backserver {server server1;server server2;Fair;}5. 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. upstream Backserver {server squid1:3128;server squid2:3128;hash $request _uri;Hash_method CRC32;}in servers that need to use load balancing, addProxy_pass http://backserver/;Upstream backserver{Ip_hash;server
. Azure load Balancing currently supports three distribution modes:1, five-tuple,2, Ternary,3, two-tuple. load Balancing set on the portal defaults to a five-tuple (source IP, source port, Destination IP, destination port, protocol type) to calculate the hash value. If a two-tuple (source IP, Destination IP) Distribution mode is used, the connection from the same client will be distributed to the same server in the balanced set . Note, however, that this can cause requests to not be distributed
QQ Sticky worm is a virus, is to use a false QQ landing page to deceive you, so that your QQ number stolen away! The danger is great! Small partners must pay attention, serious precautions! QQ Sticky worm transmission way: 1, disguised as a QQ brush drilling tools, game plug,2, disguised as a variety of QQ friends to send documents, mainly Office documents mainly. QQ
The sticky component is usually used in a navigation bar or toolbar. When a webpage is rolling in a certain area, the elements such as the navigation bar or toolbar are fixed at the top or bottom of the page, it is convenient for users to quickly operate the sticky component provided by such elements. It is usually used in navigation bar or toolbar. When a webpage is rolling in a certain area, you can pin t
Today's maintenance of the system found a very strange problem: AAA users and BBB users belong to the same AAA group, but with AAA user-created files, permissions set to 777, or can not be deleted with BBB users. Weird!After several turnover, found that AAA user to create the file location of the upper directory permissions is DRWXRWXRWT, do development for so many years, have not seen the so-called "T" permission, so found a company's Linux master Help, master crackling did a bunch of tests, an
Use the Sticky component to implement the tab navigation and scroll navigation with sticky effect, stickytab The sticky component is usually used in a navigation bar or toolbar. When a webpage is rolling in a certain area, the elements such as the navigation bar or toolbar are fixed at the top or bottom of the page, this allows you to quickly perform operations o
Tags:linux operations pictures binaries gid User profile Change account view we know that in Linux, the root administrator's permissions are large, can support the execution of most programs and commands to make corresponding changes to the file, write. Of course, these functions can only be reflected on the root administrator. However, there is a phenomenon, some ordinary users can modify their own password through the passwd command, and then indirectly modified the/etc/passwd file. Fo
CSS basics-use position: sticky to implement sticky LayoutIntroduction I have previously written an article to explain several common attributes of position: Explanation of position of CSS attributesWe generally know the following common examples: {position: static;position: relative;position: absolute;position: fixed;} The following three values are available at https://developer.mozilla.org/zh-cn/docs/web
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