log file
Information about log file
Data logging is the practice of recording sequential data, often chronologically.
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.
Examples of physical systems which have logging subsystems include process control systems, and the black box recorders installed in aircraft.
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.
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.
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.
Data logging a car allows one to observe how well the car is running. A data logger can be used to help tune the car, especially 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.
Debt, AIDS, Trade in Africa (or DATA) is a multinational non-government organization founded in January 2002 in London by U2's Bono along with Bobby Shriver and activists from the Jubilee 2000 Drop
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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.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.
Examples of physical systems which have logging subsystems include process control systems, and the black box recorders installed in aircraft.
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.
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.
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.
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 hand-held 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.Data logging a car allows one to observe how well the car is running. A data logger can be used to help tune the car, especially 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.
See also
- Server log
- Syslog
- MultiTail - tool for watching logging (for UNIX)
- Java Logging Frameworks - logging frameworks for Java
References
Sources
External links
- Syslog.org - Logging information, discussion and help site
- 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
- For other uses, see Data (disambiguation).
Debt, AIDS, Trade in Africa (or DATA) is a multinational non-government organization founded in January 2002 in London by U2's Bono along with Bobby Shriver and activists from the Jubilee 2000 Drop
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Chronology is the science of locating events in time. An arrangement of events, from either earliest to latest or the reverse, is also called a chronology or, particularly when involving graphical elements, a timeline or a living graph. See also Chronicle.
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Verbification, or verbing, is the creation of a verb from a noun, adjective, or other word. Verbification is a form of derivation, and may involve any of the various derivational processes.
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Examples
A proper or common noun can co-occur with an article or an attributive adjective. Verbs and adjectives can't. As usual, a `*' in front of an example means that this example is ungrammatical.
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A proper or common noun can co-occur with an article or an attributive adjective. Verbs and adjectives can't. As usual, a `*' in front of an example means that this example is ungrammatical.
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Logbook was originally a book for recording readings from the log, and is used to determine the distance a ship traveled within a certain amount of time. The readings of the log have been recorded in equal times to give the distance traveled with respect to a given start position.
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Centuries: 18th century - 19th century - 20th century
1790s 1800s 1810s - 1820s - 1830s 1840s 1850s
1820 1821 1822 1823 1824
1825 1826 1827 1828 1829
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1790s 1800s 1810s - 1820s - 1830s 1840s 1850s
1820 1821 1822 1823 1824
1825 1826 1827 1828 1829
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Events and trends
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19th century - 20th century - 21st century
1930s 1940s 1950s - 1960s - 1970s 1980s 1990s
1960 1961 1962 - 1963 - 1964 1965 1966
Year 1963 (MCMLXIII
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1930s 1940s 1950s - 1960s - 1970s 1980s 1990s
1960 1961 1962 - 1963 - 1964 1965 1966
Year 1963 (MCMLXIII
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Data processing is any computer process that converts data into information or knowledge. The processing is usually assumed to be automated and running on a computer. Because data are most useful when well-presented and actually informative
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In computerized data logging, a computer program automatically records events in a certain scope in order to provide an audit trail that can be used to understand the activity of the system and to diagnose problems.
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A computer program is one or more instructions that are intended for execution by a computer. Specifically, it is a symbol or combination of symbols forming an algorithm that may or may not terminate, and that algorithm is written in a programming language.
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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.
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Process control is a statistics and engineering discipline that deals with architectures, mechanisms, and algorithms for controlling the output of a specific process. See also control theory.
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flight data recorder (FDR) is a flight recorder used to record specific aircraft performance parameters. A separate device is the cockpit voice recorder (CVR), although some versions (including the original) combine both in one unit.
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An operating system (OS) is the software that manages the sharing of the resources of a computer. An operating system processes system data and user input, and responds by allocating and managing tasks and internal system resources as a service to users and programs of the
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syslog is a standard for forwarding log messages in an IP network. The term "syslog" is often used for both the actual syslog protocol, as well as the application or library sending syslog messages.
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For the human rights organization, see .
Ad hoc is a Latin phrase which means "for this purpose". It generally signifies a solution that has been custom designed for a specific problem, is non-generalizable, and cannot be adapted to other purposes...... Click the link for more information.
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). The process of creating such records is called data logging.
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automobile (from Greek auto, self and Latin mobile moving, a vehicle that moves itself rather than being moved by another vehicle or animal) or motor car (usually shortened to just car) is a wheeled passenger vehicle that carries its own motor.
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PDa may be used as an acronym for:
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Technology
- Personal digital assistant
Science
- Panic Disorder with Agoraphobia, discussed at Panic attack#Agoraphobia
- Patent ductus arteriosus, a congenital heart defect
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personal computer (PC) is a computer whose original sales price, size, and capabilities make it useful for individuals.
It is unknown who coined the phrase with the intent of a small affordable computing device but John W.
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It is unknown who coined the phrase with the intent of a small affordable computing device but John W.
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laptop computer, or simply laptop (also notebook computer or notebook), is a small mobile computer, which usually weighs 2-18 pounds (1-6 kilograms), depending on size, materials, and other factors.
A laptop computer is much smaller than a desktop.
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A laptop computer is much smaller than a desktop.
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Revolutions per minute (abbreviated rpm, RPM, r/min, or r·min−1) is a unit of frequency: the number of full rotations completed in one minute around a fixed axis.
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A server log is a log file (or several files) automatically created and maintained by a server of activity performed by it.
A typical example is a web server log which maintains a history of page requests.
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A typical example is a web server log which maintains a history of page requests.
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syslog is a standard for forwarding log messages in an IP network. The term "syslog" is often used for both the actual syslog protocol, as well as the application or library sending syslog messages.
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MultiTail [1] is a program for monitoring multiple log files, in the fashion of the original tail program. The original tail presents the last few lines of a single log file, optionally providing a real-time display of the growing file.
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Unix (officially trademarked as UNIX®) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy.
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Introduction
Logging is a common issue for most development teams. There have been several frameworks developed to ease and standardize the process of logging for the Java platform. This page covers general purpose logging frameworks...... Click the link for more information.
Java
Paradigm: Object-oriented, structured, imperative
Appeared in: 1995
Designed by: Sun Microsystems
Typing discipline: Static, strong, safe, nominative
Major implementations: Numerous
Influenced by: Objective-C, C++, Smalltalk, Eiffel,[1]
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Paradigm: Object-oriented, structured, imperative
Appeared in: 1995
Designed by: Sun Microsystems
Typing discipline: Static, strong, safe, nominative
Major implementations: Numerous
Influenced by: Objective-C, C++, Smalltalk, Eiffel,[1]
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