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7 Checks to Successfully Upgrade MongoDB Replica Set in Production

 | August 29, 2018 |  Posted In: MongoDB, Open Source Databases

checklist for the upgrade of MongoDB replica set

MongoDB ships powerful features in each release. The new release brings new features while revisions add bug fixes, security patches or improvements to existing features. To bring most out these releases to your plate you should always consider upgrading your MongoDB deployments. Planning your database upgrade can avoid the nightmares caused due to database-upgrade-gone-wrong or avoid not-so-simple rollbacks in your production […]

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Question about Semi-Synchronous Replication: the Answer with All the Details

 | August 23, 2018 |  Posted In: MariaDB, MySQL

semi-sync replication MySQL

I was recently asked a question by mail about MySQL Lossless Semi-Synchronous Replication. As I think the answer could benefit many people, I am answering it in a blog post. The answer brings us to the internals of transaction committing, of semi-synchronous replication, of MySQL (server) crash recovery, and of storage engine (InnoDB) crash recovery. […]

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Easy and Effective Way of Building External Dictionaries for ClickHouse with Pentaho Data Integration Tool

 | August 2, 2018 |  Posted In: MySQL, Open Source Databases

pentaho pdt with clickhouse

In this post, I provide an illustration of how to use Pentaho Data Integration (PDI) tool to set up external dictionaries in MySQL to support ClickHouse. Although I use MySQL in this example, you can use any PDI supported source. ClickHouse ClickHouse is an open-source column-oriented DBMS (columnar database management system) for online analytical processing. […]

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How to Automate Minor Version Upgrades for MySQL on RDS

 | July 10, 2018 |  Posted In: Amazon RDS, AWS, MySQL

upgrade minor versions MySQL Amazon RDS

Amazon RDS for MySQL offers the option to automate minor version upgrades using the minor version upgrade policy, a property that lets you decide if Amazon is allowed to perform the upgrades on your behalf. Usually the goal is not to upgrade automatically every RDS instance but to keep up to date automatically non-production deployments. […]

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