Add custom compaction policy based on number of range deletions in file

* compaction policy

* fix build error

Author: xy-54321

fdbclient/ServerKnobs.cpp

@@ -600,7 +600,9 @@ void ServerKnobs::initialize(Randomize randomize, ClientKnobs* clientKnobs, IsSi
 	init( SHARDED_ROCKSDB_MAX_WRITE_BUFFER_NUMBER,                 6 ); // RocksDB default.
 	init( SHARDED_ROCKSDB_TARGET_FILE_SIZE_BASE,            16 << 20 ); // 16MB
 	init( SHARDED_ROCKSDB_TARGET_FILE_SIZE_MULTIPLIER,             1 ); // RocksDB default.
-	init( SHARDED_ROCKSDB_SUGGEST_COMPACT_CLEAR_RANGE,          true );
+	bool suggestCompactRange = deterministicRandom()->coinflip();
+	init( SHARDED_ROCKSDB_SUGGEST_COMPACT_CLEAR_RANGE,            false ); if (isSimulated) SHARDED_ROCKSDB_SUGGEST_COMPACT_CLEAR_RANGE = suggestCompactRange;
+	init( SHARDED_ROCKSDB_COMPACT_ON_RANGE_DELETION_THRESHOLD,       200 ); if (isSimulated) SHARDED_ROCKSDB_COMPACT_ON_RANGE_DELETION_THRESHOLD = suggestCompactRange? 0:50; 
 	init( SHARDED_ROCKSDB_MAX_BACKGROUND_JOBS,                     4 );
 	init( SHARDED_ROCKSDB_BLOCK_CACHE_SIZE, isSimulated?   128 << 20 : 3LL << 30); // 3GB
 	init( SHARDED_ROCKSDB_CACHE_HIGH_PRI_POOL_RATIO,              0.5 ); /* Share of high priority Index&filter blocks in cache */

fdbclient/include/fdbclient/ServerKnobs.h

@@ -569,6 +569,7 @@ class ServerKnobs : public KnobsImpl<ServerKnobs> {
 	int SHARDED_ROCKSDB_TARGET_FILE_SIZE_BASE;
 	int SHARDED_ROCKSDB_TARGET_FILE_SIZE_MULTIPLIER;
 	bool SHARDED_ROCKSDB_SUGGEST_COMPACT_CLEAR_RANGE;
+	int SHARDED_ROCKSDB_COMPACT_ON_RANGE_DELETION_THRESHOLD;
 	int SHARDED_ROCKSDB_MAX_BACKGROUND_JOBS;
 	int64_t SHARDED_ROCKSDB_BLOCK_CACHE_SIZE;
 	double SHARDED_ROCKSDB_CACHE_HIGH_PRI_POOL_RATIO;