haproxy sticky

Specific application needs to be specific analysis, if it is small and medium-sized Web applications, such as the daily PV less than 10 million, with Nginx can be completely; if there are many machines, you can use DNS polling, LVS consumes more machines or more, large web sites or important services, and the server is relatively long, You can consider using LVS. One is through the hardware to carry out, the common hardware has more expensive F5 and array and other commercial load balancer, its

Detailed description of sticky bit in Linux, linuxsticky File permissions in Linux In linux, each file and directory has its own access permission, which determines whether the user can access the file or directory and how to access it. The most well-known file or directory may have three permissions: read, write, and execute operations, which are not described here. After a file is created, the system grants the owner the read and write permissions b

TCP is a "flow" protocol, a complete package may be split into multiple packets by TCP to send, or the small package into a large packet sent, which is called the TCP sticky packet and unpacking problems.Sticky bag, unpacking problem descriptionAssuming that the client sends packets D1 and D2 to the server individually, the following 4 scenarios may exist because the number of bytes read by the server is indeterminate. 1. The service end poin

As we have said before, the sender can be a K-K to send the data, the receiving end of the application can be two K two k to extract the data, of course, it is possible to take 3 K or 6K data, or only a few bytes of data, that is, the application to see the data is a whole, or said to be a stream (stream), in the underlying communication, this data may be split into many packets to send, but the number of bytes of a packet is not visible to the application, so the TCP protocol is a stream-orient

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-module.googlecode.com/files/nginx-sticky

Sticky bag phenomenonA program (command Ls-l) that first makes a remote execution of commands based on TCP; lllllll; PwdRes=subprocess. Popen (Cmd.decode ('utf-8'), Shell=True,stderr=subprocess. Pipe,stdout=subprocess. PIPE) The result of the encoding is based on the current system, if it is windows, then Res.stdout.read () read out is GBK encoded, at the receiving end needs to use GBK decoding and can only read the results from the pipelineAfter exec

RABBITMQ Construction: Reference RABBIMQ installation and cluster setupSecond, installation and configuration Haproxy1, installation HaproxyYum Install Haproxy2, Installation RsyslogA. Check if Rsyslog is installedRpm-q RsyslogB. Adding a log configuration for HaproxyCd/etc/rsyslog.dVim haproxy.conf= = = File contents$ModLoad IMUDP$UDPServerRun 514local2.*/var/log/haproxy.loglocal3.*/var/log/haproxy.loglocal10.*/var/log/haproxy.log==========C. Edit/etc/sysconfig/rsyslogVim/etc/sysconfig/rsyslogA

1, Haproxy introduction The HAProxy is a high-performance tcp/http reverse proxy load Balancer server with the following features: Complete HTTP request forwarding based on statically assigned cookies Load balancing between multiple servers and session stickiness based on HTTP cookies Primary and Standby server switchover Accept access to specific ports for service monitoring Enables smooth shutdown of a s

Objective Software load Balancing is generally implemented in two ways: operating system-based soft load implementation and soft load balancing based on third-party applications. LVS is a kind of soft load based on Linux operating system, while Haproxy is a soft load based on third party application. Haproxy compared to the use of LVS is much simpler, but like LVs, hapr