celldb: version 2

- thread safe cache
- parallel commit
- multiple optimizations
- support of key-value merge operations
- improved tests and benchmarks
- in-memory version won't read from key value after start - uses vector in-memory table now
- use rocksdb::WALRecoveryMode::kTolerateCorruptedTailRecords - do not silently ignore errors during recovery

validator/validator-options.hpp

@@ -139,6 +139,9 @@ struct ValidatorManagerOptionsImpl : public ValidatorManagerOptions {
   bool get_celldb_in_memory() const override {
     return celldb_in_memory_;
   }
+  bool get_celldb_v2() const override {
+    return celldb_v2_;
+  }
   td::optional<double> get_catchain_max_block_delay() const override {
     return catchain_max_block_delay_;
   }
@@ -237,6 +240,9 @@ struct ValidatorManagerOptionsImpl : public ValidatorManagerOptions {
   void set_celldb_in_memory(bool value) override {
     celldb_in_memory_ = value;
   }
+  void set_celldb_v2(bool value) override {
+    celldb_v2_ = value;
+  }
   void set_catchain_max_block_delay(double value) override {
     catchain_max_block_delay_ = value;
   }
@@ -304,6 +310,7 @@ struct ValidatorManagerOptionsImpl : public ValidatorManagerOptions {
   bool celldb_direct_io_ = false;
   bool celldb_preload_all_ = false;
   bool celldb_in_memory_ = false;
+  bool celldb_v2_ = false;
   td::optional<double> catchain_max_block_delay_, catchain_max_block_delay_slow_;
   bool state_serializer_enabled_ = true;
   td::Ref<CollatorOptions> collator_options_{true};