MariaDB is a drop-in replacement for MySQL. It is easy to install, offers many speed and performance improvements, and is easy to integrate into most MySQL deployments. Answers for compatibility questions can be found at: MariaDB versus MySQL – Compatibility. MariaDB offers more storage engines than MySQL, including Cassandra (NoSQL), XtraDB (drop-in replacement for InnoDB), and OQGRAPH.
First, you’ll follow a simple best practice: ensuring the list of available packages is up to date before installing anything new:
yum -y update
Now find which repo you should use with the MariaDB repository generator. We’re going to add the CentOS 6 (64 bit) MariaDB 10.0 repository.
vim /etc/yum.repos.d/MariaDB10.repo
# MariaDB 10.0 CentOS repository list – created 2014-10-10 17:33 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos6-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
Then exit and save the file with the command :wq .
Step #2: Add the EPEL Repository
The Open Query Graph engine (OQGRAPH) for MariaDB may have dependencies such as Judy that are apart of Extra Packages for Enterprise Linux (EPEL), which is a community repository of non-standard packages for the RHEL distribution. To install the EPEL repository:
rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Step #3: Install the Cassandra Storage Engine for MariaDB 10.0
Clean-up the repository cache information with the following command:
yum clean all
At this point, installing the Open Query Graph engine (OQGRAPH) is as simple as running just one command:
yum -y install MariaDB-oqgraph-engine
Login to the MySQL server from the command line with the following command:
mysql -u root -p
In this case, I’ve specified the user root with the -u flag, and then used the -p flag so MySQL prompts for a password. Enter your current password to complete the login.
From the MySQL command line issue the following command:
SHOW ENGINES;
You should receive a result similar to:
Now, finish installing the storage engine:
INSTALL SONAME 'ha_oqgraph';
Which should return:
Query OK, 0 rows affected (0.00 sec)
Now let’s verify that the storage engine is installed. Run the following command and look for OQGRAPH in the Enginecolumn:
SHOW ENGINES;
You should receive a result similar to:
