config: add rocksdb as a db backend option (#4239)

Closes #3831

The support for rocksdb was added a while back in
https://github.com/tendermint/tm-db/pull/12. This commit merely updates
the documentation.

CHANGELOG_PENDING.md

@@ -18,7 +18,7 @@ and a validator address plus a timestamp. Note we may remove the validator
 address & timestamp fields in the future (see ADR-25).
 
 Special thanks to external contributors on this release:
-@erikgrinaker, @PSalant726, @gchaincl, @gregzaitsev, @princesinha19
+@erikgrinaker, @PSalant726, @gchaincl, @gregzaitsev, @princesinha19, @Stumble
 
 Friendly reminder, we have a [bug bounty
 program](https://hackerone.com/tendermint).
@@ -98,6 +98,7 @@ program](https://hackerone.com/tendermint).
 - [p2p] \#4053 Add `unconditional_peer_ids` and `persistent_peers_max_dial_period` config variables (see ADR-050) (@dongsam)
 - [cli] \#4234 Add `--db_backend and --db_dir` flags (@princesinha19)
 - [cli] \#4113 Add optional `--genesis_hash` flag to check genesis hash upon startup
+- [config] \#3831 Add support for [RocksDB](https://rocksdb.org/) (@Stumble)
 
 ### IMPROVEMENTS:
 

cmd/tendermint/commands/run_node.go

@@ -85,7 +85,7 @@ func AddNodeFlags(cmd *cobra.Command) {
 	cmd.Flags().String(
 		"db_backend",
 		config.DBBackend,
-		"Database backend: goleveldb | cleveldb | boltdb")
+		"Database backend: goleveldb | cleveldb | boltdb | rocksdb")
 	cmd.Flags().String(
 		"db_dir",
 		config.DBPath,

config/config.go

@@ -160,7 +160,7 @@ type BaseConfig struct { //nolint: maligned
 	// and verifying their commits
 	FastSyncMode bool `mapstructure:"fast_sync"`
 
-	// Database backend: goleveldb | cleveldb | boltdb
+	// Database backend: goleveldb | cleveldb | boltdb | rocksdb
 	// * goleveldb (github.com/syndtr/goleveldb - most popular implementation)
 	//   - pure go
 	//   - stable
@@ -172,6 +172,10 @@ type BaseConfig struct { //nolint: maligned
 	//   - EXPERIMENTAL
 	//   - may be faster is some use-cases (random reads - indexer)
 	//   - use boltdb build tag (go build -tags boltdb)
+	// * rocksdb (uses github.com/tecbot/gorocksdb)
+	//   - EXPERIMENTAL
+	//   - requires gcc
+	//   - use rocksdb build tag (go build -tags rocksdb)
 	DBBackend string `mapstructure:"db_backend"`
 
 	// Database directory

config/toml.go

@@ -86,7 +86,7 @@ moniker = "{{ .BaseConfig.Moniker }}"
 # and verifying their commits
 fast_sync = {{ .BaseConfig.FastSyncMode }}
 
-# Database backend: goleveldb | cleveldb | boltdb
+# Database backend: goleveldb | cleveldb | boltdb | rocksdb
 # * goleveldb (github.com/syndtr/goleveldb - most popular implementation)
 #   - pure go
 #   - stable
@@ -98,6 +98,10 @@ fast_sync = {{ .BaseConfig.FastSyncMode }}
 #   - EXPERIMENTAL
 #   - may be faster is some use-cases (random reads - indexer)
 #   - use boltdb build tag (go build -tags boltdb)
+# * rocksdb (uses github.com/tecbot/gorocksdb)
+#   - EXPERIMENTAL
+#   - requires gcc
+#   - use rocksdb build tag (go build -tags rocksdb)
 db_backend = "{{ .BaseConfig.DBBackend }}"
 
 # Database directory

docs/tendermint-core/configuration.md

@@ -39,7 +39,7 @@ moniker = "anonymous"
 # and verifying their commits
 fast_sync = true
 
-# Database backend: goleveldb | cleveldb | boltdb
+# Database backend: goleveldb | cleveldb | boltdb | rocksdb
 # * goleveldb (github.com/syndtr/goleveldb - most popular implementation)
 #   - pure go
 #   - stable
@@ -51,6 +51,10 @@ fast_sync = true
 #   - EXPERIMENTAL
 #   - may be faster is some use-cases (random reads - indexer)
 #   - use boltdb build tag (go build -tags boltdb)
+# * rocksdb (uses github.com/tecbot/gorocksdb)
+#   - EXPERIMENTAL
+#   - requires gcc
+#   - use rocksdb build tag (go build -tags rocksdb)
 db_backend = "goleveldb"
 
 # Database directory