What is Nginx?

Apache which had been at the forefront of web revival is now giving its way to Nginx. Nginx is spreading at a fast pace worldwide, and at NHN as well we have been replacing web servers by Nginx more and more.

Let’s look at what Nginx is and how it differs from Apache Web Server.

In the beginning of 21st century as the use of internet became more active, people began to shed more interest on web servers capable of processing more requests. Later the C10k problem emerged in this era, in other words to enable each web server to be capable of processing 10,000 clients at the same time. Therefore a need to develop a better Network I/O and Thread management technology was emerged. During this period, far less-developed technology was applied to Linux than previous ones such as epoll and NPTL.

    epoll was designed for better process of IO events on Linux. kqueue (FreeBSD) and IOCP (Windows) are similar. NPTL is a thread library of Linux loaded on Kernel 206 and up (based on safe version). It provided enormous improvement in thread performance.

It is fair to say that the emergence of several technology was not the result of an effort to tackle C10k problem (as a common problem) but "The C10k problem" succeeded in putting together efforts to enhance performance of network server development. As a result various web servers such as Nginx, Lightpad and Cherokee made with new technology were in the market.

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