ceremonyclient/pebble/testdata/singledel_manual_compaction
Cassandra Heart 2e2a1e4789
v1.2.0 (#31)
2024-01-03 01:31:42 -06:00

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# 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, .)