The index of your 20 line file is <20TB number>
Unless, in turn, you locate the index itself in pi at a much smaller index. And so on...
Find k candidate indices for your data, then locate each of them. If the smallest one is a significantly smaller index space, repeat.
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Unless, in turn, you locate the index itself in pi at a much smaller index. And so on...
Find k candidate indices for your data, then locate each of them. If the smallest one is a significantly smaller index space, repeat.