What is IO in the backend of a web application?

Question

Database

Recently, very often (especially on a toaster) there is the phrase “everything is decay, anyway everything rests on IO”. IO is input/output? Then what do they mean? DB throughput?

Answer 1

For web applications, this means the ability to write, read and give data. When there are a lot of requests for data - you can't store all the data in memory for quick access to it - you have to go after it to disk (or to another machine). As a rule, this is where the bottle neck occurs. Especially if you have both statics and the database from one machine and the logs are written from all possible places.

Answer 2

yes, this is input-output, without specifying it can be used everywhere, no matter how stupid it sounds .... here you read, a lot will become clear http://ru.m.wikipedia.org/wiki/Input-output

Answer 3

Don't stress, the answers often contain abstractions =) The main thing, when handing over a project, do not forget to create a good UI (User Interface) in the admin panel for the client - this will be noted by the client first of all, but what kind of input-output depends on the project, there are no universal answers here.