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Indexes that are seldom used after a report migrates, should themselves migrate. Indexes that are often needed regardless of report location should remain on DASD. Larger indexes should migrate. Smaller indexes should remain on DASD.
If an index is defined as non-resident, its name will only be checked during hit-list processing, but the index file itself will not be opened and checked for an index value. Therefore, the hit list can include reports which have a correspondent index, but do not necessarily contain the requested index value.
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