MariaDB/XtraDB Cluster Default Disk Files and its Significance

Galera is the core tech behind the Percona XtraDB Cluster and MariaDB Cluster. When using the Galera cluster we might have come across multiple files in the data directory beyond the Native MySQL or InnoDB Files. It is always good to understand these files to know what is happening internally. Each file present in the … Continue reading MariaDB/XtraDB Cluster Default Disk Files and its Significance

MySQL ERROR Log Table Explained

Over the decades we have been reading the MySQL error log from the server system file, if there are any issues in MySQL or any unknown restart happened , generally we look at the mysql error log. By default MySQL error log can be found in the default path /var/log/mysqld.log , or it can be … Continue reading MySQL ERROR Log Table Explained

6 Step MySQL Point-In-Time recovery on AWS RDS

Recently one of our customers ran into an issue, wherein a bad actor(code) from the application had made the wrong update to 16 M records of a critical table in the database, causing the entire production process to go down. The application Team was able to find the bad actor and block it, our Remote … Continue reading 6 Step MySQL Point-In-Time recovery on AWS RDS

Backup and Recovery using Mariabackup.

A Database Engineer should always be aware of how the database stores valuable data and also to safeguard it. Data may be lost due to a lot of reasons like some critical problems in the hardware, crashes, human mistakes, and more other reasons. That is why we need to take database backups. To make backups … Continue reading Backup and Recovery using Mariabackup.

XtraDB Cluster troubleshooting a rejected node.

PXC(Percona XtraDB Cluster), aka Galera cluster, is one of my favorite clustering technology for MySQL that comes with real Multi-master capabilities, Write-set based nearly real-time replication and many more features. I could proudly say that Mydbops is one of the very few companies who have been supporting mission-critical clusters and preaching PXC ie., Galera cluster … Continue reading XtraDB Cluster troubleshooting a rejected node.

Integrating MySQL tools with Systemd Service

In my day to day tasks as a DB Engineer at Mydbops we have been using multiple MySQL tools for multiple use cases to ensure an optimal performance and availability for servers managed by our Remote DBA Team. A tool like pt-online-schema can be used for any DDL changes ( Overview to DDL algorithm ), … Continue reading Integrating MySQL tools with Systemd Service

Two Methods of ClickHouse Backup and Recovery

ClickHouse is known as a data analytics processing engine. ClickHouse is one of the open-source column-oriented database-oriented management systems capable of real-time generation of analytical data reports using SQL queries. Clickhouse came a long way since it inception 3 years ago. Why Mydbops recommends ClickHouse for Analytics ? ClickHouse is a Columnar Store built for … Continue reading Two Methods of ClickHouse Backup and Recovery

Securing MongoDB Cluster with TLS/SSL

The world is in a pandemic situation and I believe everyone doing good. Please Stay Home! Stay Safe! In this situation, most of the people are doing WFH, and I believe its the right time to talk about how to enable the Developer, OPS Team, and DBA can initiate secure encrypted TCP connection instead of … Continue reading Securing MongoDB Cluster with TLS/SSL

Presentation : Group Replication in MySQL 8.0

This presentation covers about the basics of Group replication in MySQL 8.0. Group replication world on the basis of Multi Paxos ( a variant of it ). The author covers the leader election algorithm , switching the primary node and replication modes in this presentation. https://www.slideshare.net/MyDBOPS/group-replication-in-mysql-80-a-walk-through Like to have this high availability MySQL solution configured … Continue reading Presentation : Group Replication in MySQL 8.0

Security: Data Masking in MySQL 8.0 server

Data security plays a major role in current age. Privacy matters a lot. Data masking is one of the Key Features when comes to security. In MySQL community versions if you want to mask your data, You can go with a Maxscale load balancer. They introduced a new masking filter on the Maxscale 2.1 version. … Continue reading Security: Data Masking in MySQL 8.0 server