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The activity of recording information about events or occurrences to a log file or database. The automatic recording of data for the purpose of accessing and updating it.

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A chronological record of system activities that is sufficient to enable the reconstruction, review, and examination of each event in a transaction from inception to output of final results. Chronological record of system activities to enable the reconstruction and examination of the sequence of events and/or changes in an event. The records created by recording information about events and occurrences into a database or log file. Some common uses of audit trails include reconstructing an event, extracting information about an incident, and proving or disproving culpability.
Most Web servers produce “log files,” timestamped lists of every request that the server receives. For each request, the log file contains anonymous information such as date and time, the IP address of the browser making the request, the document or action that is being requested, the location of the document from which the request was made, and the type of browser that was being used. Log files are usually used to ensure quality of service. They also can be used in a limited way to analyze visitor activity.
A temporary storage area, usually in RAM. The purpose of most buffers is to act as a holding area, enabling the CPU to manipulate data before transferring it to a device. Because the processes of reading and writing data to a disk are relatively slow, many programs keep track of data changes in a buffer and then copy the buffer to a disk. For example, word processors employ a buffer to keep track of changes to files. Then when you save the file, the word processor updates the disk file with the contents of the buffer. This is much more efficient than accessing the file on the disk each time you make a change to the file. Note that because your changes are initially stored in a buffer, not on the disk, all of them will be lost if the computer fails during an editing session. For this reason, it is a good idea to save your file periodically. Most word processors automatically save files at regular intervals. Another common use of buffers is for printing documents. When you enter a PRINT command, the operating system copies your document to a print buffer (a free area in memory or on a disk) from which the printer can draw characters at its own pace. This frees the computer to perform other tasks while the printer is running in the background. Print buffering is called spooling. Most keyboard drivers also contain a buffer so that you can edit typing mistakes before sending your command to a program. Many operating systems, including DOS, also use a disk buffer to temporarily hold data that they have read from a disk. The disk buffer is really a cache.
A computerized log file summarizing, in chronological sequence, the processing activities and events performed by a system. The log file is usually maintained on magnetic storage media.
A data manipulation language (DML) provides the necessary commands for all database operations, including storing, retrieving, updating, and deleting database records. The database programming language that allows users to interact with the data contained within the schema.

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