Log - Logging

> (Data|State|Operand) Management and Processing > (Data Type|Data Structure) > Log - Logging

1 - About

A log file is:

  • a list of activities an application performed.
  • and/or a common way to store data.

They are point in time event registration of line of text and therefore fall in the category of time serie

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3 - Usage

4 - Example

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5 - Management

5.1 - Creator

The creation of log is done via a library.

Example of Java Logger Library

5.2 - Format

5.3 - Processing

When the log file are becoming too big, you need to:

5.4 - (Standard|Specification)

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5.5 - Severity

RFC5424 specifies that the order of severity is assumed to be numerically ascending from most important to least important.

Example: logging levels are prioritized from 0 to 6 (highest to lowest):

{ 
  error: 0, 
  warn: 1, 
  info: 2, 
  http: 3,
  verbose: 4, 
  debug: 5, 
  silly: 6 
}

6 - Documentation / Reference