CentOS/RHEL 7 EE CPU Installation With Yum
|Note||MapD has been rebranded to OmniSci.|
This is an end-to-end recipe for installing OmniSci Enterprise Edition on a CentOS/RHEL 7 machine running without GPUs using Yum. This install has all of the functionality of OmniSci, except for backend rendering (Pointmap, Scatterplot, and other charts might not be available.)
Here is a quick video overview of the installation process.
|Important||The order of these instructions is significant. To avoid problems, install each component in the order presented.|
- These instructions assume the following:
- You are installing on a “clean” CentOS/RHEL 7 host machine with only the operating system installed.
- Your OmniSci host only runs the daemons and services required to support OmniSci.
- Your OmniSci host is connected to the Internet.
Prepare your host machine by updating your system, creating the OmniSci user, and enabling a firewall.
Update and Reboot
Update the entire system and reboot to activate the latest kernel.
sudo yum update sudo reboot
Create the OmniSci User
Create a group called
omnisci and a user named
omnisci, who will be the owner of the OmniSci database.
You can create the group, user, and home directory using the
useradd command with the
sudo useradd -U -m omnisci
To use Immerse, you must prepare your host machine to accept HTTP connections. You can configure your firewall for external access.
sudo firewall-cmd --zone=public --add-port=6273/tcp --permanent sudo firewall-cmd --reload
For more information, see https://fedoraproject.org/wiki/Firewalld?rd=FirewallD.
|Note||Most cloud providers use a different mechanism for firewall configuration. The commands above might not run in cloud deployments.|
Update the repo file at
the OmniSci repository specification:
[omnisci] name='omnisci ee - cpu' baseurl=https://releases.omnisci.com/ee/yum/stable/cpu enabled=1 gpgcheck=1 repo_gpgcheck=0 gpgkey=https://releases.omnisci.com/GPG-KEY-mapd
Use the following
yum command to install OmniSci:
sudo yum install omnisci
These are the steps to prepare your OmniSci environment.
Set Environment Variables
For convenience, you can update .bashrc with the required environment variables.
- Open a terminal window.
cd ~/to go to your home directory.
.bashrcin a text editor. For example,
sudo gedit .bashrc.
- Edit the
.bashrcfile. Add the following export commands under “User specific aliases and functions.”
# User specific aliases and functions export OMNISCI_USER=omnisci export OMNISCI_GROUP=omnisci export OMNISCI_STORAGE=/var/lib/omnisci export OMNISCI_PATH=/opt/omnisci export OMNISCI_LOG=/var/lib/omnisci/data/mapd_log
- Save the
- Open a new terminal window to use your changes.
The $OMNISCI_STORAGE directory must be dedicated to OmniSci: do not set it to a directory shared by other packages.
systemd installer. This script requires
sudo access. You
might be prompted for a password.
cd $OMNISCI_PATH/systemd sudo ./install_omnisci_systemd.sh
Accept the values provided (based on your
environment variables) or make changes as needed. The script creates a data
directory in $OMNISCI_STORAGE with the directories
directories are created when you insert data the first time. If you are an OmniSci administrator, the
directory is of particular interest.
Start and use OmniSciDB and Immerse.
cd $OMNISCI_PATH sudo systemctl start omnisci_server sudo systemctl start omnisci_web_server
Enable OmniSciDB to start automatically when the system reboots.
sudo systemctl enable omnisci_server sudo systemctl enable omnisci_web_server
Enter Your License Key
Validate your OmniSci instance with your license key.
- Copy your license key from the registration email message.
If you have not received your license key, contact your Sales Representative or register for your 30-day trial here.
- Connect to Immerse using a web browser connected to your host machine on
port 6273. For example,
- When prompted, paste your license key in the text box and click Apply.
- Click Connect to start using OmniSci.
To verify that everything is working correctly, load some sample data, perform an
omnisql query, and generate a Table chart using Immerse.
- OmniSci ships with two sample datasets of airline flight information collected in 2008. To install the sample data, run the following command.
cd $OMNISCI_PATH sudo ./insert_sample_data
- When prompted, choose whether to insert dataset 1 (7 million rows) or dataset 2 (10 thousand rows).
Enter dataset number to download, or 'q' to quit: # Dataset Rows Table Name File Name 1) Flights (2008) 7M flights_2008_7M flights_2008_7M.tar.gz 2) Flights (2008) 10k flights_2008_10k flights_2008_10k.tar.gz 3) NYC Tree Census (2015) 683k nyc_trees_2015_683k nyc_trees_2015_683k.tar.gz
- Connect to OmniSciDB by entering the following command (default password is HyperInteractive):
$OMNISCI_PATH/bin/omnisql password: ••••••••••••••••
- Enter a SQL query such as the following, based on dataset 2 above:
omnisql> SELECT origin_city AS "Origin", dest_city AS "Destination", AVG(airtime) AS "Average Airtime" FROM flights_2008_10k WHERE distance < 175 GROUP BY origin_city, dest_city;The results should be similar to the results below.
Origin|Destination|Average Airtime Austin|Houston|33.055556 Norfolk|Baltimore|36.071429 Ft. Myers|Orlando|28.666667 Orlando|Ft. Myers|32.583333 Houston|Austin|29.611111 Baltimore|Norfolk|31.714286
- Connect to Immerse using a web browser connected to your host machine on port 6273. For example,
- Create a new dashboard and a Table chart:
- Click New Dashboard.
- Click Add Chart. Table is the default chart type.
- Click Add Data Source.
- Choose the flights_2008_10k or the flights_2008_7M table as the datasource, depending on which dataset you chose for ingest.
- Click Add Measure.
- Choose depdelay.
- Click Add Measure.
- Choose arrdelay.
The resulting chart shows, unsurprisingly, that there is a correlation between departure delay and arrival delay.