This glossary contains business, technology, marketing and printing terms that have been defined from a business perspective and are not intended to be "dictionary" definitions. We hope you find them useful.
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Redundant Array of Independent Disks: RAID uses a collection of disks of the same type to provide data protection, spreading data across the disks in such a way as to maximize the recoverability of the data if there is a single disk failure. The Clarity Connect web servers use RAID 5 to help ensure uptime and data integrity.
In effect, the RAID controller aggregates the disks and presents a single disk image to host operating systems so that applications never have to know where or how the data are being placed on the storage media.
A RAID subsystem is an example of aggregation combined with virtualization. It presents a virtual volume to the computer host that "looks" like one disk, when in fact the volume is made up of many disks. The virtualization allows for easy interoperability between the host and the storage subsystem.
RAID arrays write data to multiple disks in units called stripes. Striping places only a small portion of any datastream in one location, then jumps to the next physical drive. How fast data is stored and recalled is determined by the stripe size and the location of the parity.
Data can be written to this array in several ways. In RAID Level 0, the data is striped across drives without any parity bits for error checking. This does not provide any capability for recovery but does yield maximum transfer rates.
RAID Level 1 is disk mirroring. Data is written to multiple disks simultaneously. This provides complete redundancy, but the trade-off is the loss of disk space for the complete second copy.
RAID Level 3 stripes data one byte at a time across multiple drives, with parity stored on an extra drive. The speed is good; but for large files, a small data stripe size slows the transfer.
RAID Level 5 stripes sectors of data across the multiple drives with the parity interleaved. The flexibility of RAID 5 is the key to optimizing for a specific application.
A listing put out by a medium containing advertising costs, mechanical requirements, issue dates, closing dates, cancellation dates, and circulation data.
A guarantee that an advertisers current rate under the old rate card will be protected for a period, usually from three to six months, should a new rate be introduced.
The net unduplicated percent of target audience exposed to one or more media vehicles (print, radio, TV, etc.) in a media schedule. Reach is expressed as a percentage of population base.
The number of different persons or homes exposed to a specific media vehicle or schedule at least once. Usually measured over a specific period of time, e.g. four weeks. Also known as "cume, cumulative, unduplicated, or net audience".
The average number of readers of a magazine per copy of circulation. When multiplied by a magazines circulation, the result equals its audience.
The degree to which print vehicles are seen (not necessarily read) by members of the publication's audience.
The total average number of persons who are exposed to a publication as distinguished from the circulation or number of copies distributed.
Magazine space sold at a reduced price to help fill out regional editions.
Commonly referred to as ROI.
The time when a company recoops the costs of an investment.
Stands for Red, Green, Blue, the primary colors of visible light. A computer monitor "imitates" the colors of inkn on paper by using RGB technology.
Return on Investment
Clarity Connect focuses on delivering clear marketing solutions and value-added technology that have excellent ROI and short paybacks.