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What is spooling in os?

What is spooling in os?
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  • The term "spool" is an acronym of "Simultaneous Peripheral Off-line Output Listing". Spooling is a process of transferring data by placing it in a temporary working area and using it when necessary.
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  • When a job is executed, the operating system satisfies its requests for cardreader
    input by reading from the disk and when the job requests the printer to
    output a line that line is copied into a system buffer and is written to the disk.
    When the job is completed, the output is actually printed. This form of processing
    is called spooling i.e. simultaneous peripheral operation on-line. Spooling, uses
    the disk as a huge buffer, for reading as far ahead as possible on input devices
    and for storing output files until the output devices are able to accept them.
    Spooling is also used for processing data at remote sites. The CPU sends the
    data via communications paths to a remote printer. The remote processing is
    done at its own speed, with no CPU intervention. The CPU just needs to be
    notified when the processing is completed, so that it can spool the next batch of
    data.
    Spooling overlaps the I/O of one job with the computation of other jobs. Spooling
    has a direct beneficial effect on the performance of the system. Spooling can
    keep both the CPU and the I/O devices working at much higher rates
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  • stand for simultaneous peripheral operation on line. a spool is a buffer that hold output for a device such as a printer that can search only job at a time many application needs their output at the same time ,in that case complete output will be saved in the separation disk and will be given to the printer slowly according to their speed
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  • spooling stands for simultaneous peripheral operations on-line. its refer to putting jobs in a buffer, a special area in a memory or on a disk where a device can access them when it is ready
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  • spooling stands for "simultaneous peripheral operations on-line". Spooling is the process of a sending data to a spool, or temporary storage area in the computer's memory. its refer to putting jobs in a buffer.
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  • This reply was removed on 2014-01-12.
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    , spooling refers to putting jobs in a buffer, a special area in memory or on a disk where a device can access them when it is ready. Spooling is useful because devices access data at different rates. The buffer provides a waiting station where data can rest while the slower device catches up.

    The most common spooling application is print spooling. In print spooling, documents are loaded into a buffer (usually an area on a disk), and then the printer pulls them off the buffer at its own rate. Because the documents are in a buffer where they can be accessed by the printer, you can perform other operations on the computer while the printing takes place in the background. Spooling also lets you place a number of print jobs on a queue instead of waiting for each one to finish before specifying the next one.
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