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Unlimited cell size — this is the default option. The number of IDs returned from the query or selection criteria on the Source tab of this process is not changed. With this option, the test run operates on all the data that it would during a production run, but offer and contact histories are not populated.
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Limit output cell size to — returns an exact specified number of IDs, selected randomly from all IDs that meet your query criteria. In the text box, enter the number of IDs that you want returned. With this method, Campaign deduplicates the complete set of IDs prior to random selection, then retains only the specified number of records, so that a list of unique IDs is returned even when duplicates exist on the ID fields.
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Selecting records with this option uses a large amount of temporary space and takes the most time, because all IDs must be retrieved to the Campaign server. Use this option only when the data is not normalized on the ID field, and if it is important for exactly N records to be returned.
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