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\T1/ppl/m/n/9 The I/O-aware in-dex en-ables ef-fi-cient spatio-temporal
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\T1/ppl/m/n/9 range re-trievals by di-rectly trans-lat-ing re-trieval pred-i-
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\T1/ppl/m/n/9 mech-a-nism that adap-tively em-ploys ei-ther lock-free
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\T1/ppl/m/n/9 To ad-dress the on-line I/O tun-ing prob-lem, we use
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