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

Getting started with PGBouncer in PostgreSQL

Resource management is one of the key thing in all RDBMS. DB Connections is one of them. In PostgreSQL, Allocating more connections without proper analysis of resources causes an overhead in Memory usage and the creation of an OS process for each connection will lead to a scheduling overhead in the time-sharing operating system. These … Continue reading Getting started with PGBouncer in PostgreSQL

MySQL Group Replication and its Memory consumption (troubleshooting).

This blog is about one of the issues encountered by our Remote DBA Team in one of the production servers. We have a setup of MySQL 5.7 Single Primary (Writer) GR with cluster size of  3 . Due to OOM, the MySQL process in the primary node got killed, this repeated over the course of … Continue reading MySQL Group Replication and its Memory consumption (troubleshooting).

ProxySQL Series : ProxySQL Native Cluster

ProxySQL supports a feature called clustering from version 1.4.2 .while planning for setting up a  cluster ensure to have a version greater than 1.4.2 ( latest is better) . This is still an experimental feature but works well. This blog would be a continuation of our proxysql series of blogs. MySQL replication Read-Write Split up … Continue reading ProxySQL Series : ProxySQL Native Cluster

3 Step Migration of MySQL data to Clickhouse for faster analytics.

Recently one of our client approach Mydbops with Query slowness on a MySQL environment . They deployed the new code for generate the huge reports for the year end analytics data . After the deployment the queries were extremely slow and they struggled lot , then they approached us for the solution. After the analysis, … Continue reading 3 Step Migration of MySQL data to Clickhouse for faster analytics.