# This is not actually a manual compaction test, and simply uses manual # compaction to demonstrate single delete semantics. Specifically, it # demonstrates that the behavior can be non-deterministic if not used # correctly. # Define a sequence of SET=>SET=>DEL=>SET=>SINGLEDEL. define target-file-sizes=(1, 1, 1, 1, 1) L1 a.SINGLEDEL.10: L2 a.SET.9:v3 L3 a.DEL.8: L4 a.SET.7:v2 L5 a.SET.6:v1 ---- 1: 000004:[a#10,SINGLEDEL-a#10,SINGLEDEL] 2: 000005:[a#9,SET-a#9,SET] 3: 000006:[a#8,DEL-a#8,DEL] 4: 000007:[a#7,SET-a#7,SET] 5: 000008:[a#6,SET-a#6,SET] # No data. iter first ---- . # Compact away the DEL. compact a-b L2 ---- 1: 000004:[a#10,SINGLEDEL-a#10,SINGLEDEL] 3: 000009:[a#9,SET-a#9,SET] 4: 000007:[a#7,SET-a#7,SET] 5: 000008:[a#6,SET-a#6,SET] # No data. iter first ---- . # Do two compactions to compact away the SINGLEDEL and 1 SET. compact a-b L1 ---- 2: 000010:[a#10,SINGLEDEL-a#10,SINGLEDEL] 3: 000009:[a#9,SET-a#9,SET] 4: 000007:[a#7,SET-a#7,SET] 5: 000008:[a#6,SET-a#6,SET] compact a-b L2 ---- 4: 000007:[a#7,SET-a#7,SET] 5: 000008:[a#6,SET-a#6,SET] # Deleted data reappears. iter first ---- a: (v2, .)