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HAProxy
HAProxy is a free and open source software that provides a high availability load balancer and Proxy (forward proxy,[2] reverse proxy) for TCP and HTTP-based applications that spreads requests across multiple servers.[3] It is written in C[4] and has a reputation for being fast and efficient (in terms of processor and memory usage).[5] HAProxy is used by a number of high-profile websites including GoDaddy, GitHub, Bitbucket,[6] Stack Overflow,[7] Reddit, Slack,[8] Speedtest.net, Tumblr, Twitter[9][10] and Tuenti[11] and is used in the OpsWorks product from Amazon Web Services.[12] HistoryHAProxy was written in 2000[13] by Willy Tarreau,[14] a core contributor to the Linux kernel,[15] who still maintains the project. In 2013, the company HAProxy Technologies, LLC was created.[citation needed] The company provides a commercial offering, HAProxy Enterprise and appliance-based application-delivery controllers named ALOHA. FeaturesHAProxy has the following features:
HAProxy Community vs HAProxy EnterpriseHAProxy Enterprise Edition is an enterprise-class version of HAProxy that includes enterprise suite of add-ons, expert support, and professional services. It has some features backported from the HAProxy development branch.[20] ALOHAHAProxy Technologies’ ALOHA is a plug-and-play load-balancing appliance that can be deployed in any environment. ALOHA provides a graphical interface and a templating system that can be used to deploy and configure the appliance.[21] VersionsHAProxy has had the following version releases:[22]
PerformanceServers equipped with 6 to 8 cores generally achieve between 200,000 and 500,000 requests per second, and have no trouble saturating a 25 Gbit/s connection under Linux.[23] 64-core ARM servers were shown to reach 2 million requests per second and 100 Gbit/s.[24] Similar softwareSee alsoReferences
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