Starting and Stopping MapD Core Services

MapD Core consists of two system services: mapd_server and mapd_web_server. You can start these services individually using systemd or run them using the interactive script startmapd.

Starting and Stopping MapD Core Using systemd

For permanent installations of MapD Core, MapD recommends that you use systemd to manage the MapD Core services. systemd automatically handles tasks such as log management, starting the services on restart, and restarting the services if they die.

Initial Setup

The install_mapd_systemd.sh script asks a few questions about your environment and then installs the systemd service files in the correct location. You must run the script as the root user for the script to perform tasks such as creating directories and changing owner.

cd $MAPD_PATH/systemd
sudo ./install_mapd_systemd.sh

This script asks for the information described in the following table.

Variable	Use	Default	Notes
MAPD_PATH	Path to the MapD Core installation directory	Current install directory	Consider creating a generic symlink pointing at the install directory and set MAPD_PATH to the symlink to make upgrades easier.
MAPD_STORAGE	Path to the storage directory for MapD Core data and configuration files	/var/lib/mapd	Must be dedicated to MapD. The installation script creates the directory $MAPD_STORAGE/data, generates an appropriate configuration file, and saves the file as $MAPD_STORAGE/mapd.conf.
MAPD_USER	User MapD Core is run as	Current user	User must exist before you run the script.
MAPD_GROUP	Group MapD Core is run as	Current user’s primary group	Group must exist before you run the script.
MAPD_LIBJVM_DIR	Path to the libjvm library directory	The script attempts to find the default path	See Common Dependencies.

NOTE: On MapD releases 3.0.0 and lower, for backend rendering-enabled builds, the install_mapd_systemd.sh script installs a service named mapd_xorg. This service is configured to start Xorg on display :1, which the mapd_server service is configured to use. Before proceeding, start the mapd_xorg service before mapd_server if you want to use backend rendering:

sudo systemctl start mapd_xorg
sudo systemctl enable mapd_xorg # start mapd_xorg on startup

Starting MapD Core Using systemd

To manually start MapD Core using systemd, run:

sudo systemctl start mapd_server
sudo systemctl start mapd_web_server

Stopping MapD Core Using systemd

To manually stop MapD Core using systemd, run:

sudo systemctl stop mapd_server
sudo systemctl stop mapd_web_server

Enabling MapD Core on Startup

To enable the MapD Core services to start on restart, run:

sudo systemctl enable mapd_server
sudo systemctl enable mapd_web_server

Starting and Stopping MapD Core Using startmapd

MapD recommends that you start MapD Core using systemd. However, you can use the startmapd command for quick testing and system validation. It does not require root access to run. In addition, use startmapd on platforms that do not support systemd, such as Debian 7, CentOS 6, and Docker.

You can run MapD Core using the startmapd script provided in $MAPD_PATH/startmapd. This script creates the data directory if it does not exist, inserts a sample dataset if desired, and starts both mapd_server and mapd_web_server.

NOTE: For MapD releases 3.0.0 and lower, for backend rendering support, start Xorg and set the DISPLAY environment variable before running startmapd:

sudo X :1 &
export DISPLAY=:1

Starting MapD Core Using startmapd

To use startmapd to start MapD Core, run:

$MAPD_PATH/startmapd --config /path/to/mapd.conf

if you are using a configuration file, or

$MAPD_PATH/startmapd --data $MAPD_STORAGE

to explicitly specify the $MAPD_STORAGE directory.

Stopping MapD Core When Using startmapd

To stop an instance of MapD Core that was started with the startmapd script, kill the startmapd process using CTRL-C or pkill startmapd. You can also use pkill mapd to ensure that all processes have been killed.