Mastering Concurrency in Go by Nathan Kozyra

Author:Nathan Kozyra [Kozyra, Nathan]
Language: eng
Format: epub, pdf
Publisher: Packt Publishing
Published: 2014-07-22T21:00:00+00:00

However, the Web in 1990 and the Web when the C10K question was first posed were two very different environments.

By 1999, most sites had some level of secondary or tertiary latency provided by third-party software, CGI, databases, and so on, all of which further complicated the matter. The notion of serving 10,000 flat files concurrently is a challenge in itself, but try doing so by running them on top of a Perl script that accesses a MySQL database without any caching layer; the challenge is immediately exacerbated.

By the mid 1990s, the Apache web server had taken hold and largely controlled the market (by 2009, it had become the first server software to serve more than 100 million websites).

Apache's approach was rooted heavily in the earliest days of the Internet. At its launch, connections were initially handled first in, first out. Soon, each connection was assigned a thread from the thread pool. There are two problems with the Apache server. They are as follows:

Blocking connections can lead to a domino effect, wherein one or more slowly resolved connections could avalanche into inaccessibility

Apache had hard limits on the number of threads/workers you could utilize, irrespective of hardware constraints

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