Closed zjs1224522500 closed 1 year ago
Please refer to the 4th paragraph of Section 4 in the paper. The size of sorted runs (SSTables) is not even, so if there are 10 SSTable for the same key range, the aggregated size is not 10x of leveling; it is averaged out to ~3.3.
The same thing also happens in Jungle; batch size is not even. But, Jungle triggers inter-level merge based on the actual size, not the number of batches. So it is closer to the expected size (10x for C=10) than tiering.
Page 57 and 58 in this slide visualize it.
Got it~ Thanks for your reply!