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Mongrel (web Server)
Mongrel is an open-source software HTTP library and web server written in Ruby by Zed Shaw. It is used to run Ruby web applications and presents a standard HTTP interface. This makes layering other servers in front of it possible using a web proxy, a load balancer, or a combination of both, instead of having to use more conventional methods employed to run scripts such as FastCGI or SCGI to communicate. This is made possible by integrating a custom high-performance HTTP request parser implemented using Ragel. Mongrel was the first web server used by Twitter, and inspired Node.js according to Ryan Dahl. Shaw subsequently created Mongrel2, an open-source " language agnostic" web server and the successor to Mongrel server. Deployment One popular configuration was to run Apache HTTP Server 2.2 as a load balancer using mod_proxy_balancer in conjunction with several Mongrel instances. Each Mongrel instance would run on a separate TCP port, configured via the mongrel_cluster manageme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zed Shaw
Zed A. Shaw is a software developer best known for creating the ''Learn Code the Hard Way'' series of programming tutorials, as well as for creating the Mongrel web server for Ruby web applications. He is also well known for his polemical views on programming languages and communities. Software Shaw authored the Mongrel web server for Ruby web applications. Mongrel was the first web server used by Twitter, and inspired Node.js, according to its creator Ryan Dahl. Mongrel2 is the language-agnostic successor to Mongrel. He has also written a Python mail server called Lamson, on which the mailing list site LibreList is built. Learn Code the Hard Way Shaw is the author of learncodethehardway.org, which offers to teach users Python, Ruby, C, Regex, and SQL. Polemics and controversies Shaw has been outspoken in his criticism of certain programming language and technical communities. Ruby on Rails His most famous and well-covered piece was the article "Rails is a Ghetto" which h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCGI
The Simple Common Gateway Interface (SCGI) is a protocol for applications to interface with HTTP servers, as an alternative to the CGI protocol. It is similar to FastCGI but is designed to be easier to parse. Unlike CGI, it permits a long-running service process to continue serving requests, thus avoiding delays in responding to requests due to setup overhead (such as connecting to a database). SCGI is a ''protocol'' which defines ''communication'' between a web server and an application server. This is in contrast to CGI, which is an earlier application (gateway) interface designed to let the application programmer avoid the complexity of sockets and long-running service processes when poor scalability and high overhead are acceptable. The SCGI protocol leverages the fact that the web server has already parsed and validated the HTTP request, and canonically communicates the request to the SCGI server while letting the application programmer avoid parsing ambiguities and protocol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puma (web Server)
Puma is an HTTP web server derived from Mongrel and written by Evan Phoenix. It stresses speed and efficient use of memory. Reception and use Puma is the web server shipped with Mastodon and recommended by the Heroku hosting provider as a replacement for Unicorn. Deliveroo Deliveroo is a British online food delivery company founded by Will Shu and Greg Orlowski in 2013 in London, England. It operates in the United Kingdom, France, Belgium, Ireland, Italy, Singapore, Hong Kong, the United Arab Emirates and Kuwait ... published a benchmark comparing the two servers and concluded “Puma performs better than Unicorn in all tests that were either heavily IO-bound or that interleaved IO and CPU work”, but that Unicorn was still slightly better performing in situations where CPU load was the limiting factor. References External links * {{Web server software Free web server software Free software programmed in Ruby Web server software for Linux Software using the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single Threading
In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system. The implementation of threads and processes differs between operating systems. In Modern Operating Systems, Tanenbaum shows that many distinct models of process organization are possible.TANENBAUM, Andrew S. Modern Operating Systems. 1992. Prentice-Hall International Editions, ISBN 0-13-595752-4. In many cases, a thread is a component of a process. The multiple threads of a given process may be executed concurrently (via multithreading capabilities), sharing resources such as memory, while different processes do not share these resources. In particular, the threads of a process share its executable code and the values of its dynamically allocated variables and non- thread-local global variables at any given time. History Threads made an early appearance under the name of "tasks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruby On Rails
Ruby on Rails (simplified as Rails) is a server-side web application framework written in Ruby under the MIT License. Rails is a model–view–controller (MVC) framework, providing default structures for a database, a web service, and web pages. It encourages and facilitates the use of web standards such as JSON or XML for data transfer and HTML, CSS and JavaScript for user interfacing. In addition to MVC, Rails emphasizes the use of other well-known software engineering patterns and paradigms, including convention over configuration (CoC), don't repeat yourself (DRY), and the active record pattern. Ruby on Rails' emergence in 2005 greatly influenced web app development, through innovative features such as seamless database table creations, migrations, and scaffolding of views to enable rapid application development. Ruby on Rails' influence on other web frameworks remains apparent today, with many frameworks in other languages borrowing its ideas, including Django in Pyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unicorn (web Server)
Unicorn is a Rack HTTP server to serve Ruby web applications on UNIX environment. It is optimised to be used with nginx. It is based on now deprecated Mongrel 1.1.5 from 2008. Architecture Unicorn uses a master/worker architecture, where a master process forks worker processes and controls them. The application runs in a single thread. Reception and use Unicorn was considered as “one of the most popular servers for Rails”. Twitter started to test Unicorn in 2010. This server is shipped with Discourse. Their system administrator Sam Saffron noted Unicorn was reliable, as it reaps unresponsive workers. Unicorn inspired other projects like Gunicorn, a fork to run Python applications. As of 2018, projects tend to favour Puma. The Heroku hosting provider recommends since 2015 to migrate from Unicorn to Puma. Deliveroo published a benchmark comparing the two servers and concluded “Puma performs better than Unicorn in all tests that were either heavily IO-bound or that interl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port (computer Networking)
In computer networking, a port is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system, a port is a logical construct that identifies a specific process or a type of network service. A port is identified for each transport protocol and address combination by a 16-bit unsigned number, known as the port number. The most common transport protocols that use port numbers are the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). A port number is always associated with an IP address of a host and the type of transport protocol used for communication. It completes the destination or origination network address of a message. Specific port numbers are reserved to identify specific services so that an arriving packet can be easily forwarded to a running application. For this purpose, port numbers lower than 1024 identify the historically most commonly used services ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mod Proxy
mod_proxy is an optional module for the Apache HTTP Server. This module implements a proxy, gateway or cache for Apache. It implements proxying capability for AJP13 (Apache JServ Protocol version 1.3), FTP, CONNECT (for SSL), HTTP/0.9, HTTP/1.0, and (since Apache 1.3.23) HTTP/1.1. The module can be configured to connect to other proxy modules for these and other protocols. One powerful feature of Apache is flexible virtual hosting—multiple virtual hosts on a single server. This is a convenient way to partition separate websites and applications. With mod_proxy it is possible to set various web framework-based applications up as virtual hosts as well. mod_proxy can help to improve LAMP security or to strip SSL from HTTP requests. History This module was experimental in Apache 1.1.x. As of Apache 1.2, mod_proxy stability was greatly improved. Since Apache 2.0, proxy features are divided into several modules in addition to mod_proxy: mod_proxy_http, mod_proxy_ftp, and m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apache HTTP Server
The Apache HTTP Server ( ) is a free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation. The vast majority of Apache HTTP Server instances run on a Linux distribution, but current versions also run on Microsoft Windows, OpenVMS, and a wide variety of Unix-like systems. Past versions also ran on NetWare, OS/2 and other operating systems, including ports to mainframes. Originally based on the NCSA HTTPd server, development of Apache began in early 1995 after work on the NCSA code stalled. Apache played a key role in the initial growth of the World Wide Web, quickly overtaking NCSA HTTPd as the dominant HTTP server. In 2009, it became the first web server software to serve more than 100 million websites. , Netcraft estimated that Apache served 23.04% of the million busiest websites, while Nginx served 22. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Language-independent Specification
A language-independent specification (LIS) is a programming language specification providing a common interface usable for defining semantics applicable toward arbitrary language bindings. LIS's are language-agnostic; they mitigate the risk that a certain language binding might reduce compatibility with other languages. An ideal LIS allows the language bindings to take advantage of features of a programming language uncompromisingly. Examples of LIS include Interface description language interface description language or interface definition language (IDL), is a generic term for a language that lets a program or object written in one language communicate with another program written in an unknown language. IDLs describe an inter ..., Simplified Wrapper and Interface Generator and Common Language Infrastructure. Recursive transcompiling can be used to distribute a language independent specification across many different technologies, with each technology potentially keep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongrel2
Mongrel2 is an open-source "language agnostic" web server written by Zed Shaw, and is the successor to Shaw's Mongrel server. The server supports HTTP, Flash XMLSockets, WebSocket WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection. The WebSocket protocol was standardized by the IETF as in 2011. The current API specification allowing web applications ...s and long polling connections. Language agnostic Mongrel2 is described as language agnostic, meaning it does not prefer any specific programming language over another. The server's documentation says: Development Shaw began working on the server in June 2010 and released version 1.0 of the software on September 1, 2010. Mongrel2 has nothing in common with the original Mongrel webserver, except for using the same HTTP parser. References External links * Free web server software 2010 software Web server software for Linux {{free-software ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Node
In general, a node is a localized swelling (a "knot") or a point of intersection (a vertex). Node may refer to: In mathematics *Vertex (graph theory), a vertex in a mathematical graph *Vertex (geometry), a point where two or more curves, lines, or edges meet. *Node (autonomous system), behaviour for an ordinary differential equation near a critical point *Singular point of an algebraic variety, a type of singular point of a curve In science and engineering Astronomy *Orbital node, the points where an orbit crosses a plane of reference ** Lunar node, where the orbits of the sun and moon intersect ** Longitude of the ascending node, how orbital nodes are parameterized Biology *Lymph node, an immune system organ used to store white blood cells *Node of Ranvier, periodic gaps in the insulating myelin sheaths of myelinated axons *Sinoatrial node and atrioventricular node, specialized tissues in the heart responsible for initiating and coordinating the heartbeat *Primitive knot or p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
