use 16 now for later refactor

I will try to support large db index for xcodis

config/config.go

@@ -215,8 +215,8 @@ func (cfg *Config) adjust() {
 	cfg.ConnWriteBufferSize = getDefault(4*KB, cfg.ConnWriteBufferSize)
 	cfg.TTLCheckInterval = getDefault(1, cfg.TTLCheckInterval)
 	cfg.Databases = getDefault(0, cfg.Databases)
-	if cfg.Databases > 256 {
-		cfg.Databases = 256
+	if cfg.Databases > 16 {
+		cfg.Databases = 16
 	}
 }
 

config/config.toml

@@ -11,7 +11,7 @@ data_dir = "/tmp/ledis_server"
 
 # Set the number of databases. You can use `select dbindex` to choose a db.
 # dbindex must be in [0, databases - 1].
-# Maximum databases is 256. 
+# Maximum databases is 16 now. 
 databases = 16
 
 # Log server command, set empty to disable

etc/ledis.conf

@@ -11,8 +11,8 @@ data_dir = "/tmp/ledis_server"
 
 # Set the number of databases. You can use `select dbindex` to choose a db.
 # dbindex must be in [0, databases - 1].
-# Maximum databases is 256. 
-databases = 256
+# Maximum databases is 16 now. 
+databases = 16
 
 # Log server command, set empty to disable
 access_log = ""

ledis/ledis.go

@@ -45,8 +45,8 @@ func Open(cfg *config.Config) (*Ledis, error) {
 
 	if cfg.Databases == 0 {
 		cfg.Databases = 16
-	} else if cfg.Databases > 256 {
-		cfg.Databases = 256
+	} else if cfg.Databases > 16 {
+		cfg.Databases = 16
 	}
 
 	os.MkdirAll(cfg.DataDir, 0755)