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author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 16 Jan 2012 11:11:30 +0000 |
parents | e00f8f8c0486 |
children | f94bcab2a6ae |
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<!DOCTYPE article SYSTEM "../../dtd/article.dtd"> <article name="nginx" link="/en/" lang="en"> <section> <para> nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server, written by <link url="http://sysoev.ru/en/">Igor Sysoev</link>. For a long time, it has been running on many heavily loaded Russian sites including <link url="http://www.yandex.ru">Yandex</link>, <link url="http://www.mail.ru">Mail.Ru</link>, <link url="http://vkontakte.ru">VKontakte</link>, and <link url="http://www.rambler.ru">Rambler</link>. According to Netcraft nginx served or proxied <link url="http://news.netcraft.com/archives/2012/01/03/january-2012-web-server-survey.html">8.49% busiest sites in January 2012</link>. Here are some of the success stories: <link url="http://blog.fastmail.fm/2007/01/04/webimappop-frontend-proxies-changed-to-nginx/">FastMail.FM</link>, <link url="http://barry.wordpress.com/2008/04/28/load-balancer-update/">Wordpress.com</link>. </para> <para> The sources are distributed under the <link url="../LICENSE">2-clause BSD-like license</link>. </para> </section> <section id="basic_http_features" name="Basic HTTP server features"> <para> <list> <item> Serving static and index files, and <link doc="docs/http/ngx_http_autoindex_module.xml">autoindexing</link>; <link doc="docs/http/ngx_http_core_module.xml" id="open_file_cache">open file descriptor cache</link>; </item> <item> <link doc="docs/http/ngx_http_proxy_module.xml">Accelerated reverse proxying with caching</link>; <link doc="docs/http/ngx_http_upstream_module.xml">simple load balancing and fault tolerance</link>; </item> <item> Accelerated support with caching of <link doc="docs/http/ngx_http_fastcgi_module.xml">FastCGI</link>, uwsgi, SCGI, and memcached servers; <link doc="docs/http/ngx_http_upstream_module.xml">simple load balancing and fault tolerance</link>; </item> <item> Modular architecture. Filters include gzipping, byte ranges, chunked responses, XSLT, SSI, and <link doc="docs/http/ngx_http_image_filter_module.xml">image transformation</link> filter. Multiple SSI inclusions within a single page can be processed in parallel if they are handled by proxied or FastCGI servers; </item> <item> SSL and TLS SNI support. </item> </list> </para> </section> <section id="other_http_features" name="Other HTTP server features"> <para> <list> <item> Name-based and IP-based virtual servers; </item> <item> <link doc="docs/http/ngx_http_core_module.xml" id="keepalive_timeout">Keep-alive</link> and pipelined connections support; </item> <item> Flexible configuration; </item> <item> <link doc="docs/control.xml" id="reconfiguration">Reconfiguration</link> and <link doc="docs/control.xml" id="upgrade">upgrade of an executable</link> without interruption of the client servicing; </item> <item> <link doc="docs/http/ngx_http_log_module.xml" id="log_format">Access log formats</link>, <link doc="docs/http/ngx_http_log_module.xml" id="access_log">buffered log writing</link>, and <link doc="docs/control.xml" id="logs">fast log rotation</link>; </item> <item> 3xx-5xx error codes <link doc="docs/http/ngx_http_core_module.xml" id="error_page">redirection</link>; </item> <item> The rewrite module: URI changing using regular expressions; </item> <item> Executing different functions depending on the client address; </item> <item> Access control based on <link doc="docs/http/ngx_http_access_module.xml">client IP address</link> and <link doc="docs/http/ngx_http_auth_basic_module.xml">HTTP Basic authentication</link>; </item> <item> The PUT, DELETE, MKCOL, COPY, and MOVE methods; </item> <item> <link doc="docs/http/ngx_http_flv_module.xml">FLV</link> and <link doc="docs/http/ngx_http_mp4_module.xml">MP4</link> streaming; </item> <item> <link doc="docs/http/ngx_http_core_module.xml" id="limit_rate">Response rate limiting</link>; </item> <item> Limiting the number of simultaneous <link doc="docs/http/ngx_http_limit_conn_module.xml">connections</link> or <link doc="docs/http/ngx_http_limit_req_module.xml">requests</link> coming from one address; </item> <item> Embedded Perl. </item> </list> </para> </section> <section id="mail_proxy_server_features" name="Mail proxy server features"> <para> <list> <item> User redirection to IMAP/POP3 backend using an external HTTP authentication server; </item> <item> User authentication using an external HTTP authentication server and connection redirection to an internal SMTP backend; </item> <item> Authentication methods: <list> <item> POP3: USER/PASS, APOP, AUTH LOGIN/PLAIN/CRAM-MD5; </item> <item> IMAP: LOGIN, AUTH LOGIN/PLAIN/CRAM-MD5; </item> <item> SMTP: AUTH LOGIN/PLAIN/CRAM-MD5; </item> </list> </item> <item> SSL support; </item> <item> STARTTLS and STLS support. </item> </list> </para> </section> <section id="architecture_and_scalability" name="Architecture and scalability"> <para> <list> <item> One master and several worker processes; worker processes run under an unprivileged user; </item> <item> The notification methods: kqueue (FreeBSD 4.1+), epoll (Linux 2.6+), rt signals (Linux 2.2.19+), /dev/poll (Solaris 7 11/99+), event ports (Solaris 10), select, and poll; </item> <item> The support of the various kqueue features including EV_CLEAR, EV_DISABLE (to temporarily disable events), NOTE_LOWAT, EV_EOF, number of available data, error codes; </item> <item> sendfile (FreeBSD 3.1+, Linux 2.2+, Mac OS X 10.5+), sendfile64 (Linux 2.4.21+), and sendfilev (Solaris 8 7/01+) support; </item> <item> <link doc="docs/http/ngx_http_core_module.xml" id="aio">File AIO</link> (FreeBSD 4.3+, Linux 2.6.22+); </item> <item> <link doc="docs/http/ngx_http_core_module.xml" id="directio">DIRECTIO</link> (FreeBSD 4.4+, Linux 2.4+, Solaris 2.6+, Mac OS X); </item> <item> Accept-filters (FreeBSD 4.1+) and TCP_DEFER_ACCEPT (Linux 2.4+) <link doc="docs/http/ngx_http_core_module.xml" id="listen">support</link>; </item> <item> 10,000 inactive HTTP keep-alive connections take about 2.5M memory; </item> <item> Data copy operations are kept to a minimum. </item> </list> </para> </section> <section id="tested_os_and_platforms" name="Tested OS and platforms"> <para> <list> <item> FreeBSD 3 — 10 / i386; FreeBSD 5 — 10 / amd64; </item> <item> Linux 2.2 — 2.6 / i386; Linux 2.6 / amd64; </item> <item> Solaris 9 / i386, sun4u; Solaris 10 / i386, amd64, sun4v; </item> <item> AIX 7.1 / powerpc </item> <item> Mac OS X / ppc, i386; </item> <item> Windows XP, Windows Server 2003. </item> </list> </para> </section> </article>