# Configuration
This document explains the configurable properties of the node. Klaytn node package ships with good defaults and requires very little configuration. If you changed any settings of a running node, you must restart the node to reflect the changes.
## CN Configuration File location
* `kcnd.conf` for configuring the Consensus Node
The configuration file is located in the `conf` directory, whose default location depends on whether or not the installation is from an archive distribution (`tar.gz`) or a package distribution (RPM).
* For the archive distribution, the config directory location defaults to `$INSTALL_PATH/kcn-linux-amd64/conf/`.
* For the package distribution, the config directory defaults to `/etc/kcnd/conf/`.
## PN Configuration File location
* `kpnd.conf` for configuring the Proxy Node
The configuration file is located in the `conf` directory, whose default location depends on whether or not the installation is from an archive distribution (`tar.gz`) or a package distribution (RPM).
* For the archive distribution, the config directory location defaults to `$INSTALL_PATH/kpn-linux-amd64/conf/`.
* For the package distribution, the config directory defaults to `/etc/kpnd/conf/`.
## EN Configuration File location
* `kend.conf` for configuring the Endpoint Node
The configuration file is located in the `conf` directory, whose default location depends on whether or not the installation is from an archive distribution (`tar.gz`) or a package distribution (RPM).
* For the archive distribution, the config directory location defaults to `$INSTALL_PATH/ken-linux-amd64/conf/`.
* For the package distribution, the config directory defaults to `/etc/kend/conf/`.
## Configuration File Format
CN and PN have the same configuration file format and the properties.
Below is a sample configuration file for the CN that participates in the `cypress` network and stores the blockchain data in the default location, which is `~/kcnd_home` with the archive distribution, `/var/kcnd/data` with the package distribution.
```
# Configuration file for the kcnd
# cypress, baobab is only available if you don't specify NETWORK_ID.
NETWORK="cypress"
# if you specify NETWORK_ID, a private network is created.
NETWORK_ID=
PORT=32323
SERVER_TYPE="fasthttp"
SYNCMODE="full"
VERBOSITY=3
MAXCONNECTIONS=100
# LDBCACHESIZE=10240
REWARDBASE="0x0"
...
DATA_DIR=
LOG_DIR=$DATA_DIR/logs
```
The recommended txpool sizes for CN are as follows.
```
TXPOOL_EXEC_SLOTS_ALL=16384
TXPOOL_NONEXEC_SLOTS_ALL=16384
TXPOOL_EXEC_SLOTS_ACCOUNT=16384
TXPOOL_NONEXEC_SLOTS_ACCOUNT=16384
```
The recommended txpool sizes for PN are as follows.
```
TXPOOL_EXEC_SLOTS_ALL=8192
TXPOOL_NONEXEC_SLOTS_ALL=8192
TXPOOL_EXEC_SLOTS_ACCOUNT=8192
TXPOOL_NONEXEC_SLOTS_ACCOUNT=8192
```
The recommended txpool sizes for EN are as follows.
```
TXPOOL_EXEC_SLOTS_ALL=4096
TXPOOL_NONEXEC_SLOTS_ALL=4096
TXPOOL_EXEC_SLOTS_ACCOUNT=4096
TXPOOL_NONEXEC_SLOTS_ACCOUNT=4096
```
## Properties
The configuration file has the following configurable properties. CN and PN configuration files have the same properties except `REWARDBASE.`
| Name | Description |
| ------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| NETWORK | Network name that this node will join. This value is used when NETWORK\_ID is not defined. ("cypress", "baobab") |
| NETWORK\_ID | Klaytn network ID. If you create a local private network, you will define the network ID for your own. Following IDs are reserved for pre-configured networks.
8217 : Cypress (Main network)
1000 : Aspen test network
1001 : Baobab test network
|
| PORT | P2P port. (Default: "32323") |
| SERVER\_TYPE | JSON RPC server type. ("http", "fasthttp") |
| SYNCMODE | Blockchain sync mode. ("fast", "full") |
| VERBOSITY | Logging verbosity. (0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail) |
| MAXCONNECTIONS | Maximum number of physical connections. All single-channel peers can have up to MAXCONNECTIONS peers. All multi-channel peers can have up to MAXCONNECTIONS/2 peers. Network connection is disabled if it is set to 0. (Default: 10) |
| LDBCACHESIZE | Size of in-memory cache in LevelDB (MiB). (Default : 768) |
| REWARDBASE | Account address that will receive block consensus rewards. This property only applies to CN. |
| TXPOOL\_EXEC\_SLOTS\_ALL | Maximum number of executable transaction slots for all accounts. (Default: 4096) |
| TXPOOL\_NONEXEC\_SLOTS\_ALL | Maximum number of non-executable transaction slots for all accounts. (Default: 1024) |
| TXPOOL\_EXEC\_SLOTS\_ACCOUNT | Number of executable transaction slots guaranteed per account. (Default: 16) |
| TXPOOL\_NONEXEC\_SLOTS\_ACCOUNT | Maximum number of non-executable transaction slots guaranteed per account. (Default: 64) |
| TXPOOL\_LIFE\_TIME | Maximum amount of time non-executable transactions is queued. (Default : 5m) |
| RPC\_ENABLE | Enable the HTTP-RPC server if it is set to 1. |
| RPC\_API | Comma-separated list of APIs offered over the HTTP-RPC interface. (admin, debug, klay, miner, net, personal, rpc, txpool, web3) |
| RPC\_PORT | HTTP-RPC server listening port. (Default: "8551") |
| RPC\_ADDR | HTTP-RPC server listening interface. (Default: "localhost") |
| RPC\_CORSDOMAIN | Comma-separated list of domains from which to accept cross-origin requests (browser enforced) |
| RPC\_VHOSTS | Comma-separated list of virtual hostnames from which to accept requests (server enforced). Accepts '\*' wildcard. (Default: {"localhost"}) |
| WS\_ENABLE | Enable the WS-RPC server if it is set to 1. |
| WS\_API | APIs offered over the WS-RPC interface. (admin, debug, klay, miner, net, personal, rpc, txpool, web3) |
| WS\_ADDR | WS-RPC server listening interface. |
| WS\_PORT | WS-RPC server listening port. (Default : "8552") |
| WS\_ORIGINS | Origins from which to accept websockets requests. (Default: "localhost") |
| AUTO\_RESTART | Restart the process when the current block has not been updated for `autorestart.timeout` (e.g., 60s, 10m and 1h) if it is set to 1. |
| METRICS | Enable metrics collection and reporting if it is set to 1. |
| PROMETHEUS | Enable prometheus exporter if it is set to 1. |
| DB\_NO\_PARALLEL\_WRITE | Disable parallel writes of block data to persistent database if it is set to 1. |
| MULTICHANNEL | Create a dedicated channel for block propagation if it is set to 1. |
| SUBPORT | Listening sub port number if multichannel option is enabled. (Default : "32324") |
| NO\_DISCOVER | Turn off the discovery option if it is set to 1. |
| BOOTNODES | Comma-separated kni addresses of bootstrap nodes. |
| ADDITIONAL | For additional command-line options. e.g) --txpool.nolocals |
| DATA\_DIR | Klaytn blockchain data folder path. |
| LOG\_DIR | Log folder path. |