MySQL 5.7 comes with a new set of features and multi-source replication is one of them. In few words this means that one slave can replicate from different masters simultaneously.

During the last couple of months I’ve been playing a lot with this trying to analyze its potential in a real case that I’ve been facing while working with a customer.

This was motivated because my customer is already using multi-sourced slaves with Tungsten Replicator and I wanted to do a side-by-side comparison between Tungsten Replicator and Multi-source Replication in MySQL 5.7

Consider the following scenario:

DB1 is our main master attending mostly writes from several applications, it also needs to serve read …

In this blog, I will discuss about warnings that users might face if they are trying to purge active/in_use binary log which are introduced in MySQL-5.6.12/MySQL-5.7.2 releases.  Before jumping directly to that, I will be covering few basic things about PURGE BINARY LOGS command, about safe way to purge the binary logs on a replication forum. If you are good at basics on "PURGE BINARY LOGS" , you can choose to directly move to the section (at the end of the blog) where I was talking about these new warnings.

Introduction:
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A binary log file contains “events” that describe database changes occurred on a MySQL Server (typically called Master) that enabled binary logging using --log-bin. On a Master server, the files that are related to binary logging are binary log files (files with binlog_base_name.6_digit serial_number) and a binary log index file (file with …

We had a great time meeting with folks from the industry and are excited about the innovations being pursued by the community and various companies. 

Videos of our keynote panel participation and talks are available now.

Percona Live 2015 Keynote Panel discussion - Ritesh Chhajer

High Availability using Percona XtraDB Cluster - Trey Raymond & Yashada Jadhav

MySQL Performance Analyzer - Xiang Rao & Ashwin Nellore

…

We had a great time meeting with folks from the industry and are excited about the innovations being pursued by the community and various companies. 

Videos of our keynote panel participation and talks are available now.

Percona Live 2015 Keynote Panel discussion - Ritesh Chhajer

High Availability using Percona XtraDB Cluster - Trey Raymond & Yashada Jadhav

MySQL Performance Analyzer - Xiang Rao & Ashwin Nellore

…

MySQL for Visual Studio 1.2.4 has been released

The MySQL Windows Experience Team is proud to announce the release of MySQL for Visual Studio 1.2.4. This is a maintenance release for 1.2.x, and it can be used for production environments.

MySQL for Visual Studio is a product that includes all of the Visual Studio integration functionality to create and manage MySQL databases when developing .NET applications.

This version is appropriate for using with MySQL server versions 5.5-5.6. The 5.7 server version is also compatible but is not fully supported, thus it should be used at your own discretion.

As this is a GA version of the MySQL for Visual Studio product, it can be downloaded by using the product standalone installer at this link http://dev.mysql.com/downloads/windows/visualstudio or with the …

Welcome to MySQL QA Episode 9. This episode will go more in-depth into reducer.sh: Reducing Testcases for Experts: multi-threaded reducer.sh

We will explore how to use reducer.sh to do true multi-threaded testcase reduction – a world’s first.

Topics:

1. Expert configurable variables & their default reducer.sh settings
   1. PQUERY_MULTI
   2. PQUERY_MULTI_THREADS
   3. PQUERY_MULTI_CLIENT_THREADS
   4. PQUERY_MULTI_QUERIES
   5. PQUERY_REVERSE_NOSHUFFLE_OPT

Full-screen viewing @ 720p resolution recommended.

The post MySQL QA Episode 9: Reducing Testcases for Experts: multi-threaded reducer.sh appeared first on …

Download MariaDB 10.1.6

Release Notes Changelog What is MariaDB 10.1?

MariaDB APT and YUM Repository Configuration Generator

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.1.6. This is a Beta release.

See the Release Notes and …

Maintaining a project like MySQL::Sandbox is sometimes tiring, but it has its advantages. One of them is that everything related to the server setup comes to my attention rather earlier than if I were an average DBA or developer.

I try to keep MySQL Sandbox up to date with every release of MySQL and (to a lesser extent) MariaDB [1]. For this reason, I am used to trying a new release with MySQL Sandbox, and … seeing it fail.

Of the latest changes in MySQL, probably the most disruptive was what happened in MySQL 5.7.6, where the mysql.user table lost the password column.

Yep. No ‘password’ column anymore. And just to make the setup procedure harder, the syntax of SET PASSWORD …

This Log Buffer Edition covers Oracle, SQL Server and MySQL blogs of the running week.

Oracle:

• While checking the sources of the Cassandra/NetBeans integration into GitHub yesterday, something went very badly wrong and ALL the source files in my Maven project that disappeared!
• AWR Reports, Performance Hub, historisches SQL Monitoring in 12c
• Oracle Database Mobile Server 12c: Advanced data synchronization engine
• ORA-39001, ORA-39000 and …

Previously I tested Tokutek’s Fractal Trees (TokuMX & TokuMXse) as MongoDB storage engines – today let’s look into the MySQL area.

I am going to use modified LinkBench in a heavy IO-load.

I compared InnoDB without compression, InnoDB with 8k compression, TokuDB with quicklz compression.
Uncompressed datasize is 115GiB, and cachesize is 12GiB for InnoDB and 8GiB + 4GiB OS cache for TokuDB.

Important to note is that I used tokudb_fanout=128, which is only available in our latest Percona Server release.
I will …