Choosing the right database for your application is not an easy task, but it is vital to the success of the application. MariaDB is a drop-in replacement for MySQL with additional features and better performance. Learn how to install or upgrade mariadb on CentOS 8 / RHEL 8 in this post!
Introduction
MariaDB is a free and open source relational database management system. It is a fork of the popular MySQL database system. MariaDB is compatible with MySQL, which means that it can use all of the existing MySQL databases and tools. MariaDB is widely used in both production and development environments.
CentOS and RHEL are two popular Linux distributions. Both distributions use the RPM Package Manager (RPM) to install, update, and remove software packages. MariaDB is available in the RPM repository for both distributions.
In this guide, we will show you how to install MariaDB on CentOS 7 and RHEL 7. We will also show you how to create a new database and user, and how to grant privileges to the user.
Adding MariaDB Repository to Yum
To add the MariaDB repository to yum, you will need to install the MariaDB RPM package from the MariaDB website. You can do this by running the following command:
curl -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | sudo bash
After running this command you will be able to install the latest version of MariaDB from the official MariaDB repository.
Installing MariaDB Server
Once the repository has been added, you can install MariaDB by running the following command:
yum install MariaDB-server MariaDB-client
How to Enable MariaDB Service to Start At Boot
To enable the MariaDB service to start automatically at boot, you’ll need to use the chkconfig command. You can do this by running the following command:
systemctl enable mariadb
This will enable the MariaDB service to start automatically whenever the server is rebooted.
How to Start MariaDB Service
The first thing you need to do is start the MariaDB service. You can do this by running the following command:
systemctl start mariadb
How to Secure MariaDB Server Installation
It is important to secure your MariaDB server installation to protect your data from being accessed by unauthorized users. One way to do this is to set a password for the root user. You can do this by running the following command:
mysql_secure_installation
Answer the questions the prompt gives you for best experience.
You will be prompted to enter a password for the root user, put your password there and make sure you copy it to a safe location, so you will not lose it.
Adding a New Database to The MariaDB Server
Adding a new database to the MariaDB server is a simple process. First, log in to the MariaDB server as root. Then, create a new database using the “CREATE DATABASE” command. For example, to create a new database named “new_db”, you would use the following command:
CREATE DATABASE new_db;
Creating a User And Granting It Permissions
In order to create a new user, log into the MariaDB shell as the root user and running the following commands:
Creating the user “new_user” and the password “password”:
CREATE USER 'new_user'@'localhost' IDENTIFIED BY 'password';
Granting permissions for the new user on the new database:
GRANT ALL PRIVILEGES ON new_db.* TO 'new_user'@'localhost' IDENTIFIED BY 'password';
Flushing privileges (saves privileges):
FLUSH PRIVILEGES;
Conclusion
In this article, we have shown you how to install MariaDB on a AlmaLinux 8 or RHEL 8 server.
We also showed you how to create a new database and user, and how to grant the user permissions to access the database. Once you have MariaDB installed and configured on your server, you can begin working with databases and tables. Thanks for reading!
Introduction
There are a lot of databases that you see on your day to day life, but not all have the same features and functions. One database that is particular to this article is Redis which has been in existence for over 5 years. With it’s built in caching functionalities, Redis doesn’t need as much time to complete as many other databases do. With that said, today we will be discussing about Redis Sentinel with High Availability and how useful it can be for managing private data of millions of users out there.
What is Redis?
Redis is an open source database that is often used for data caching and message queuing. It is known for its high performance and scalability. Redis Sentinel is a high availability solution for Redis. It provides failover and automatic failover in the event of a failure or outage.
What is Redis Sentinel?
Redis Sentinel is a high availability solution for Redis. It provides a mechanism for monitoring, discovering and failover for Redis instances.
Sentinel also recently gained the ability to automatically promote slaves to masters if needed, making the failover process completely automatic. This is a very important feature, as it reduces the time needed to recover from a failure and eliminates any potential for human error.
Overall, Sentinel is a very robust solution that can help keep your Redis instance up and running even in the face of failures.
What Does a High Availability Installation Do?
Installing Redis in a high availability configuration is pretty simple. All you need is to have two or more instances of Redis running on different nodes. The nodes can be physical or virtual machines. Redis Sentinel is a monitoring and failover tool that comes with Redis. It is designed to work with Redis in a high availability setup.
Redis Sentinel monitors the health of your Redis instances and automatically fails over to a standby instance if the primary instance goes down. This way, your data is always available and accessible even if one of the servers goes down.
There are a few things to keep in mind when setting up Redis in a high availability configuration. First, make sure that each instance has its own dedicated storage. This way, if one instance goes down, the others can still access the data. Second, configure yoursentinel.conf file so that each instance knows about the other instances in the cluster.
Last, but not least, test your setup! Install Redis on your local machine and try running some commands to see if everything is working as expected. If everything looks good, then you’re ready to deploy Redis in a high-availability setup.
How can you prevent data loss with Redis and Redis Sentinel?
Redis Sentinel is a high availability solution that helps to prevent data loss in the event of a Redis server failure. By configuring multiple Redis servers as sentinels, Sentinel can monitor the health of the servers and automatic failover to a standby server if necessary. This ensures that your data is always available and prevents loss in the event of a failure.
Why Should You Use High Availability?
There are many reasons to use high availability options for your Redis data service. Some of these reasons include:
- To ensure that your data is always available and can be quickly accessed by your applications.
- To avoid any downtime of your data service, which can be critical for business users.
- To improve the performance of your data service by making use of multiple servers.
- To increase the security of your data by replicating it across multiple servers.
- To reduce the cost of running your Redis data service by using cheaper commodity hardware.
Conclusion
Redis Sentinel is a key component of Redis’ high availability offering. By providing automatic failover and monitoring of your Redis servers, Sentinel gives you the peace of mind that your data is always accessible. If you are running a mission-critical Redis deployment, I highly recommend using Redis Sentinel to ensure that your data is always available.
There are many factors to consider when choosing a database for your business. Two of the most popular databases are MySQL and MariaDB. Both databases are open source and have a large community of users and developers. MariaDB is a fork of MySQL, and both databases are widely used in web applications. However, there are some differences between the two databases that you should be aware of. MySQL is owned by Oracle, while MariaDB is developed by the original developers of MySQL. MariaDB is compatible with all major Linux distributions, while MySQL is only compatible with some. MariaDB has a number of storage engines that are not available in MySQL. MariaDB also supports a wider range of character sets and has better performance on certain workloads. When deciding which
MySQL
-Pros:
-Owned by Oracle
-Can use InnoDB storage engine
-Wider range of character sets
-Cons:
-Not compatible with all major Linux distributions
MariaDB
-Pros:
-Developed by original developers of MySQL
-Fork of MySQL, compatible with all major Linux distributions
-InnoDB is the default storage engine
-Number of storage engines not available in MySQL
-Wider range of character sets
-Better performance on certain workloads
-Cons:
-Owned by Oracle-not a 100% open source
-Differences in versions in earlier releases
When should I use MySQL vs MariaDB?
When building a new web application, you should use MySQL instead of MariaDB if:
You plan to use InnoDB as your storage engine
You want compatibility with most major Linux distributions
You want to use a character set that uses multi-byte encoding (such as Chinese, Japanese, or Korean)
You want a more mature community and more support options
You should use MariaDB instead of MySQL if:
You plan to use another storage engine, such as Memory, Memory of Shared Memory, Fileakuya, or Aria
You want a more modern database (MariaDB is two years younger than MySQL)
You need to support client-side character sets that are larger than255 bytes
Your applications perform better on full-text search that is built
If you’re looking for a database that is compatible with all major Linux distributions, has better performance on certain workloads, and supports a wider range of character sets, then MariaDB is the right database for your business.
Conclusion
If you’re looking for a reliable and scalable database for your business, then MariaDB is the right choice. It is compatible with all major Linux distributions, supports a wide range of character sets, and has better performance on certain workloads. If you’re looking for a database that is easy to use and has a large community of users and developers, then MySQL is the right database for your business. However, if you’re looking for a database that is more stable and scalable, then MariaDB is the right choice.
When deciding which database to use for your business, it is important to consider your needs and the features of each database. If you need a database that is compatible with all major Linux distributions, then MariaDB is the right choice. If you need a database with a wide range of character sets and better performance on certain workloads, then MariaDB is also the right choice. However, if you need a database that is owned by Oracle and is only compatible with some Linux distributions, then MySQL is the right choice.
What is Redis Server?
Redis is an open source, in-memory data store that can be used as a database, cache, or message broker. It is often used for web applications to improve performance by storing frequently accessed data in memory. Redis can also be used for other types of applications that require fast data access.
What are the benefits of using Redis Server?
Redis Server is an open source, in-memory data store that can be used as a database, cache, or message broker. It is a popular choice for web applications that require high performance and low latency. Redis Server is easy to use and has a rich set of features that make it a good fit for a variety of use cases.
Redis Server is fast and scalable. It can handle a large number of concurrent connections and has a high throughput. Redis Server is also highly available and can be deployed in a cluster.
Redis Server has a number of features that make it a good choice for web applications. It supports data structures such as lists, sets, and hashes. It also has atomic operations for adding and removing items, as well as fast add and remove operations. This makes redis server a good fit for web applications that require frequent add and update operations, such as content management systems, web chat, and user profiles.
Final Thoughts
If you need a fast, in-memory database for web applications, then Redis server is a good option. It is scalable and highly available. It supports a variety of data structures that can be used for different applications. Its features support both relational and non-relational data modeling. If you’re still wondering what is Redis server, then know that it is a data structure server that can handle a large number of concurrent connections, and is used to store and retrieve data in real-time.
