One question that surfaces regularly in the Percona forums: Does every node in a Percona XtraDB Cluster (PXC) need to have XtraBackup installed? It's a fair question, especially when managing a mixed environment or trying to minimize the software footprint on certain nodes. Here is what the actual mechanics and testing confirm.

The Short Answer (But Read On)

It depends on what you want that node to do. The nuance matters quite a bit here, so it is worth walking through how State Snapshot Transfer (SST) works in PXC and why XtraBackup's presence — or absence — on a given node is significant.

A Quick Refresher on SST in PXC

When a new node joins a Percona XtraDB Cluster, or when an existing node has been down long enough that Incremental State Transfer (IST) is no longer possible, the cluster performs a State Snapshot Transfer (SST). This is essentially a full data …

This blog was originally published in February 2017 and was updated in September 2023.

In this blog post, I provide an in-depth introduction to MySQL Replication, answering what it is, how it works, its benefits and challenges, as well as reviewing some of the MySQL replication concepts that are part of the MySQL environment (and Percona Server for MySQL specifically). I will finish by also clarifying some of the common misconceptions people have about replication and how Percona can help.

Since I’ve been working on the Solution Engineering team, I’ve noticed that – although information is plentiful – replication is often misunderstood or incompletely understood.

What is MySQL Replication?

MySQL replication is …

In this blog we will create MySQL backup and then restore single table from Percona Xtrabackup without doing full restore. This post is basically a work-log in response to a…

The post Restore single MySQL table (ibd) from Xtrabackup (video demo) first appeared on Change Is Inevitable.

Given the recent surge of interest in ChatGPT and the AI capabilities it offers, I decided to conduct an interview with it to assess its suitability for a MySQL Consultant…

The post MySQL Interview – ChatGPT is not your DBA first appeared on Change Is Inevitable.

In the last few years there have been several examples of major service problems affecting businesses data: outages causing data inconsistencies; unavailability or data loss, and worldwide cyberattacks encrypting your files and asking for a ransom.

Database-related incidents are a very common industry issue- even if the root cause is not the database system itself. No matter if your main relational system is MySQL, MariaDB, PostgresQL or AWS Aurora -there will be a time where you will need to make use of backups to recover to a previous state. And when that happens it will be the worst time to realize that your backup system hadn’t been working for months, or testing for the first time a cluster-wide recovery.

Forget about the backups, it is all about recovery!

Let me be 100% clear: the question is not IF data …

This is my first post in 2019, and Im starting with a MySQL solution. In MySQL world, implementing a better backup strategy to meet all of your requirement is still a challenging thing. The complexity depends on your RPO and RTO. Percona has many tools to help DBAs in many scenarios. Xtrabackup is one of …

The post Automation Script For Percona Xtrabackup FULL/Incremental appeared first on SQLgossip.

Image Source: DigitalOcean

This is my first post in 2019, and Im starting with a MySQL solution. In MySQL world, implementing a better backup strategy to meet all of your requirement is still a challenging thing. The complexity depends on your RPO and RTO. Percona has many tools to help DBAs in many scenarios. [Xtrabackup](https://www.percona.com/software/mysql-database/percona-xtrabackup) is one of the best backup tools to perform a better backup on TeraBytes size of databases. Also, another great feature is it supports Incremental and Differential backup.

There are couple of tools which is available in MySQL world, But due to some restrictions we can’t achieve what we are expecting.

#1 mysqldump

This is a widely used backup tool and most of the DBAs are trust this. This comes with …

MySQL binary logs make possible to implement point-in-time recovery and greatly reduce Recovery Point Objective. In this post I will show how to copy MySQL binary logs with TwinDB Backup. MySQL binary logs was an easy way to implement replication. Whenever the server executes a DML query it also writes the query to a local […]

The post How to Backup MySQL Binary logs appeared first on TwinDB.

If you are going to be using InnoDB tables and if you plan to have innodb_file_per_table enabled, then your best option would probably be to use the CREATE TABLE statement’s “DATA DIRECTORY” option, so that you can place a table outside the data directory.
From the MySQL documentation:

DATA DIRECTORY, INDEX DIRECTORY

For InnoDB, the DATA DIRECTORY=’directory’ option allows you to create InnoDB file-per-table tablespaces outside the MySQL data directory. Within the directory that you specify, MySQL creates a subdirectory corresponding to the database name, and within that a .ibd file for the table. The innodb_file_per_table configuration option must be enabled to use the DATA DIRECTORY option with InnoDB. The full directory path must be specified. See Section 14.7.5, “Creating File-Per-Table Tablespaces Outside the Data Directory” for more information.

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Some time ago, our team released a new version of TwinDB Backup Tool that contains minor fixed and some major improvements. In this article I want to highlight major features in this release. Status refactoring The tool stores backups metadata in a JSON file that I will refer further as the status. The status is […]

The post TwinDB Backup Tool Release 2.15.7 appeared first on TwinDB.