CASSANDRA-20918 Add cursor-based low allocation optimized compaction implementation#4402

Open

nitsanw wants to merge 15 commits intoapache:trunkfrom

jmckenzie-dev:compaction-work-pr-prep

Commits on Aug 28, 2025

Add cursor based optimized compaction path (WIP)

Nitsan Wakart
authored and
jmckenzie-dev
committed

Commits on Sep 29, 2025

Merge branch 'trunk' into compaction-work-pr-prep
nitsanw
authored

Commits on Oct 9, 2025

Fix MEGABYTE constant
Nitsan Wakart
committed

Commits on Oct 14, 2025

Fix 0x11/0x10 should be 0b11/0b10
Nitsan Wakart
committed
Introduce ENABLE_CURSOR_COMPACTION controls via CassandraRelevantProperties/Config
Nitsan Wakart
committed
Revert `matched` comments left to track stats tracking
Nitsan Wakart
committed
Revert change to RandomAccessReader and match row skipping logic from elsewhere using seek
Nitsan Wakart
committed
Improve CompactionCursor javadoc
Nitsan Wakart
committed
Extract `isSupported` from constructor
Nitsan Wakart
committed

Commits on Oct 15, 2025

Fix Trasnactions/Transformations
Nitsan Wakart
committed
Add comment and rename `sortForPartitionMerge` -> `prepareForPartitionMerge` and return true when partitions remain
Nitsan Wakart
committed
Typo: `preturbed` -> `perturbed`
Nitsan Wakart
committed
Javadoc for bubbleInsertToPreSorted and minor refactor
Nitsan Wakart
committed
Typo: passed -> past
Nitsan Wakart
committed
Remove redundant TODOs
Nitsan Wakart
committed