Prefetcher

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H. Joe Lee edited this page Jun 8, 2022 · 19 revisions

Prefetcher

Prefetcher promotes the BLOBs in Hermes to improve the I/O performance. It predicts the next BLOBs to get and place them in a queue.

Algorithms

Frequency: Count the number of times a BLOB has been read since its creation.
Recency: Calculate the interval between the present and the last access time of a BLOB.