Severalnines Blog
The automation and management blog for open source databases

Severalnines blog

Filter by:
Apply (1) filters
210 blog posts in 1 category

MongoDB vs MySQL NoSQL - Why Mongo is Better

As the great database wars rage some users may be considering whether to use the new document storage features of MySQL 8.0 instead of the traditional MongoDB NoSQL setup. This blog explains why Mongo is still the king of the NoSQL world.

Migrating from Oracle Database to MariaDB - What You Should Know

For many organizations, migrating from Oracle to an open source database platform is just a matter of time. An Oracle to MariaDB migration can be a complex multistage process, but choosing the right database architecture and features can reduce the cost and time of the operation. This blog aims to help you better understand the details of the complexities involved and how to overcome them.

Migrating from DB2 to PostgreSQL - What You Should Know

This blog provides a high level overview of what you should know if considering a move from IBM’s DB2 to PostgreSQL including a comparison of commands and an examination of the incompatibilities of the databases.

How to Cluster Odoo 12 with PostgreSQL Streaming Replication for High Availability

Automating all your business processes with Odoo puts stringent requirements on the availability of the platform. What do you do if a server fails? In this blog post, we’ll show you how to cluster Odoo to achieve better availability and scalability on multiple servers. The softwares used are Odoo 12, HAProxy 1.8.8, Keepalived 1.3.9, PostgreSQL 11 and OCFS2 (Oracle Cluster File System).

How to Migrate MySQL from Amazon EC2 to your On-Prem Data Center Without Downtime

Database migrations are a pain. They often require maintenance windows and can be a cause of downtime. In this blog, we will see how we can migrate a MySQL database from Amazon EC2 to an on-premise datacenter without any downtime whatsoever.

Basic Administration Comparison Between Oracle, MSSQL, MySQL, PostgreSQL

Supporting different types of databases in a mixed environment is not an easy task. In this blog post we will compare different types of RDBMS systems from the DBA/DevOps administration perspective.

PostgreSQL High Availability with Master-Slave & Master-Master Architectures

Database servers can work together to allow a second server to take over quickly if the primary server fails (high availability), or to allow several computers to serve the same data (load balancing).

For HA PostgreSQL configurations we can have several architectures, but the basic ones would be master-slave and master-master architectures.

Monitoring & Ops Management of MongoDB 4.0 with ClusterControl

MongoDB 4.0 added support for multi-document ACID transactions, which brings it closer to the relational world. But how can you manage it, along with other relational open source databases like MySQL, MariaDB and PostgreSQL? In this blog post, we look at the challenges of operating a MongoDB database, and see how important tasks like monitoring, alerting, backups and failover can be handled with ClusterControl.

Analytics with MariaDB AX - the Open Source Columnar Datastore

What is a columnar datastore? When is it a better fit over a relational datastore? In this blog post, we will take a look at MariaDB AX and how it fits in this landscape.

How to Backup and Restore ClusterControl

Migrating ClusterControl to new hardware used to be a pain - you had to reinstall it on the new server, restore configuration/metadata from the old one and redo database grants so the new server can access your managed databases. Not any more! Starting with 1.7.1, it is possible to backup the ClusterControl server in one command and restore it on a new server, with data, grants and all.  This blog shows you how to do this using the s9s CLI.