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Encyclopedia > Data logging

Data logging is the practice of recording sequential data, often chronologically. For other uses, see Data (disambiguation). ... For the novel by Michael Crichton, see Timeline (novel). ...

Contents

Etymology

To log is a verbed derivative of the noun logbook; the verb form means to record in a logbook, and may have been coined in the 1820s. The term logbook itself stems from the practice of floating a stationary "log" (actually a wooden block attached to a reel via rope) to provide a fixed point of reference for the purpose of measuring a ship's speed (see Knot (speed)). Computer scientists adopted the verb to log circa 1963 to describe the systematic recording of specific types of data processing events. Verbing is a common form of etymology and neologism in English, as well as a type of wordplay and a form of anthimeria, in which words other than verbs are used as verbs. ... Noun or noun substantive is a lexical category which is defined in terms of how its members combine with other grammatical kinds of expressions. ... logbook aboard the frigate Grand Turk A Logbook is a book for recording readings from the log (see also maritime log). ... Nationalistic independence helped reshape the world during this decade: Greece gains independence from the Ottoman Empire in the Greek War of Independence (1821-1827). ... A knot is a unit of speed abbreviated kt or kn. ... 1963 (MCMLXIII) was a common year starting on Tuesday (the link is to a full 1963 calendar). ... Data processing is any computer process that converts data into information or knowledge. ...


Computer data logging

In computerized data logging, a computer program may automatically record events in a certain scope in order to provide an audit trail that can be used to diagnose problems. A computer program is a collection of instructions that describe a task, or set of tasks, to be carried out by a computer. ... An audit trail or audit log is a chronological sequence of audit records, each of which contains evidence directly pertaining to and resulting from the execution of a business process or system function. ...


Examples of physical systems which have logging subsystems include process control systems, and the black box recorders installed in aircraft. Process control is an engineering discipline that deals with architectures, mechanisms, and algorithms for controlling the output of a specific process. ... An example of a FDR (Flight Data Recorder). ...


Many operating systems and multitudinous computer programs include some form of logging subsystem. Some operating systems provide a syslog service (described in RFC 3164), which allows the filtering and recording of log messages to be performed by a separate dedicated subsystem, rather than placing the onus on each application to provide its own ad hoc logging system. An operating system (OS) is a set of computer programs that manage the hardware and software resources of a computer. ... syslog is a standard for forwarding log messages in an IP network. ... Ad hoc is a Latin phrase which means for this [purpose]. It generally signifies a solution that has been tailored to a specific purpose, such as a tailor-made suit, a handcrafted network protocol, and specific-purpose equation and things like that. ...


In many cases, the logs are esoteric and hard to understand; they need to be subjected to log analysis in order to make sense of them. Log analysis (or system and network log analysis) is an art and science seeking to make sense out of computer-generated records (also called log or audit trail records). ...


It can be useful to combine log file entries from multiple sources. This approach, in combination with statistical analysis, may yield correlations between seemingly-unrelated events on different servers. Other solutions employ network-wide querying and reporting.

Main article: Computer data logging

This article or section does not cite any references or sources. ...

Automotive data logging

The performance characteristics of a car can be monitored through its diagnostic port. There are several ways to do this; one way is by using a handheld device with software already installed and the appropriate cable to hook into the diagnostic port. Another method is to use a PDA loaded with specialized software and employ a special cable that plugs into the diagnostic port. Finally, a PC can be used, laptops generally work best, using specialized software and connecting it to the car with a specially-made cable. Karl Benzs Velo (vélo means bicycle in French) model (1894) - entered into the first automobile race 2005 MINI Cooper S. An automobile (also motor car or simply car) is a wheeled passenger vehicle that carries its own motor. ... Look up PDA in Wiktionary, the free dictionary. ... The Altair 8800 was among the first microcomputers to be affordable by an individual, although it initially lacked peripherals and memory. ... An ultraportable IBM X31 with 12 screen on an IBM T43 Thin & Light laptop with a 14 screen A laptop computer, or simply laptop (also notebook computer or notebook), is a small mobile computer, which usually weighs 2. ...


Datalogging a car allows one to observe how well the car is running. A datalogger can be used to help tune the car, espcially if modifications have been made to the vehicle. The reason it helps is that it logs various parameters in the engine such as ignition timing, injector pulse, RPM, knock/detonation, barometer pressure, temperature, oxygen sensors, and various other sensor data. Using the information that is provided (and either some sort of piggy-back or standalone system), a user can change the injector pulse width so that the engine is fed more or less fuel, increase or decrease ignition timing, and other changes. Such changes are made to make the car run more reliably or achieve higher performance. rpm or RPM may mean: revolutions per minute RPM Package Manager (originally called Red Hat Package Manager) RPM (movie) RPM (band), a Brazilian rock band RPM (magazine), a former Canadian music industry magazine In firearms, Rounds Per Minute: how many shots an automatic weapon can fire in one minute On...


See also

A server log is a file (or several files) automatically created and maintained by a server of activity performed by it. ... syslog is a standard for forwarding log messages in an IP network. ... Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIX®) is a computer operating system originally developed in the 1960s and 1970s by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ...

Sources

  • log at the Online Etymology Dictionary

External links

  • Data Logging tutorial using a microcontroller and HyperTerminal
  • Beobachter, an opensource software to monitor log files
  • Logtext - A free command line utility and a direct link library for Windows systems
  • Pantheios - A C++ logging library
  • Mango M2M - Open source software for data logging, monitoring, and device control
  • Synotronics - Temperature & humidity data logging devices
  • A free PHP script for logging website access

  Results from FactBites:
 
Data Logging (1955 words)
Data logging is used to capture an arbitrary amount of S Meter data and save it in a file.
When the program is running, the S Meter data is always being collected from the radio at a rate of 20 samples per second.
In this case, logged data is never written to the file at a rate greater than one record per second, and the amount of data written is a single line of text.
Data logging - Wikipedia, the free encyclopedia (405 words)
Data logging is the practice of recording sequential data, often chronologically.
To log is a verbed derivative of the noun logbook; the verb form means to record in a logbook, and may have been coined in the 1820s.
In computerized data logging, a computer program may automatically record events in a certain scope in order to provide an audit trail that can be used to diagnose problems.
  More results at FactBites »

 
 

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