sticky connections load balancing

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: what is a connection (Connection), what is a se

downQuery Nginx main process numberPs-ef | grep nginxCalmly stop Kill-quit master process numberFast Stop Kill-term main process numberForce Stop kill-9 NginxIf the PID file path is configured nginx.conf, if not, in the logs directoryKill-Signal type '/usr/local/nginx/logs/nginx.pid 'Upgrade1. Replace the old program file with the new program first2, KILL-USR2 the old version of the program's main process number or process file nameAt this point the old Nginx master process will rename its proc

, support the URL detection backend server problem detection will be very good to help.4, it is just like the LVS, itself is only a load balancer software, simply from the efficiency of the haproxy more than Nginx has a better load balancing speed, in concurrent processing is better than nginx.5, Haproxy can load balan

from the active connection of the cache, instead of creating a new one immediately. If the cache is empty, NGINX then creates a new connection. This operation reduces the latency between Nginx and upstream servers and reduces the utilization of temporary ports. Therefore, NGINX can handle high concurrency. This technology, coupled with other load balancing technologies, is sometimes calledConnection Pool,

the actual application layer and then the client must establish a connection (three handshake), and then according to the specific fields in the message, Plus the server selection method of the Load Balancer device setting determines the final selected internal server. Load balancer device In this case, it is more like a proxy server. The load balancer and the f

, Plus the server selection method of the Load Balancer device setting determines the final selected internal server. Load balancer device In this case, it is more like a proxy server. The load balancer and the front-end clients and the backend servers establish TCP connections separately. So from this point of view, t

proxy server can monitor backend servers, such as system load, response time, availability, TCP connections, and traffic, so as to adjust the load balancing policy based on the data. 5. The reflection proxy server allows you to always forward all requests in a session cycle to a specific backend server (

reverse proxy server. The load balancer and the front-end clients and the backend servers establish TCP connections separately. So from this point of view, the seven-layer load balancer is significantly more demanding for load balancing devices, and the ability to handle se

options: Client Affinity: A cookie is assigned to requests from different clients, and then the cookie is followed to identify which server the request should be handled by. Host name Affinity: Based on host name for sticky processing, there are two provider that can be used: Microsoft.Web.Arr.HostNameRoundRobin: Ensure that the server is distributed as evenly as possible Microsoft.Web.Arr.HostNameMemory: Allocate accord

options: Client Affinity: A cookie is assigned to requests from different clients, and then the cookie is followed to identify which server the request should be handled by. Host name Affinity: Based on host name for sticky processing, there are two provider that can be used: Microsoft.Web.Arr.HostNameRoundRobin: Ensure that the server is distributed as evenly as possible Microsoft.Web.Arr.HostNameMemory: Allocate accord

What is LVS??? Let's start with a brief introduction to LVS (Linux Virtual Server), which is actually a cluster (Cluster) technology that uses IP load balancing technology and content-based request distribution technology. The scheduler has a good throughput rate, transfers the request evenly to the different server execution, and the scheduler automatically shields off the server's failure, thereby forming

processed, all requests that originate behind the client of the request are handed over to the same server for processing. This is the server Affinity. Apr provides us with two options: Client Affinity: A cookie is assigned to requests from different clients, and then the cookie is followed to identify which server the request should be handled by. Host name Affinity: Based on host name for sticky processing, there are two provider that

gateway directs all requests to the IP address of the Service to the DR. After receiving the data packet, the DR will follow the scheduling algorithm, find the corresponding REALSERVER, change the destination MAC address to the MAC address of the REALSERVER, and send it to the REALSERVER. When the REALSERVER receives this packet, it is equal to directly receiving this packet from the client, after processing, it is directly returned to the client. Because DR needs to change the L2 packet header

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

-Based Least Connection): local-Based Least join The locality-based least connection algorithm is used for load balancing and scheduling of the target IP address of the Request Message. It is not used in the Cache cluster system because the IP address of the customer request packet in the Cache cluster is changed, if any backend server can process any request, the algorithm is designed to schedule requests

enterprise-class features that are chargeable, including session consistency, health checks, dynamic update configurations, and more. HTTP Load Balancing NGINX Plus provides many optimizations for HTTP load balancing, such as HTTP upgrades, long-connection optimizations, content compression, and response caching. The

Ribbon Load Balancing mechanismIn the previous chapter, "Introduction and construction of the Ribbon framework (no integration with Springcloud, independent use)" introduced the Ribbon Framework and construction use, then in this chapter will talk about the Ribbon load balancing mechanism, the following rules of the au

Layer-4 and layer-7 Load Balancing details, layer-4 and layer-7 Load Balancing I. background of SLB: SLB (Server Load balancer): when multiple servers provide the same service, the Server Load balancer device has a virtual service

Massive Image Distributed Storage and Load Balancing Research, massive Load Balancing Research on Distributed Storage and load balancing of Massive images For Web servers, users' access to image information consumes a lot

Rotten mud: keyword introduction of high load balancing learning haproxy, load balancing haproxy This document consistsIlanniwebProviding friendship sponsorship, first launched in the dark world In the previous article, we briefly explained the installation and Setup of haproxy. In this article, we will introduce the