Are you ready to accept the challenge? Really? Can you prove that you have got what it takes to be an effective DBA? Go grab the tests from https://github.com/dbadojo/test-mysql-restore and see if you do… Background: These tests are designed to … Continue reading →

Is it cheating? Is using MySQL without Structured Query Language (SQL) or putting all your data into one column proper? Impossible a year ago and probably thought as a poor/crazy practice until recently, this is a new type of MySQL usage. NoSQL has had a big impact in the SQL world with several relational products from vendors like MySQL, Microsoft, Postgresql and others offering NoSQL interfaces and JSON data types to their databases.

Several old timers have come to me asking if putting lots of data in a JSON column is cheating? After all data normalization is part of relational databases and the way to efficiency and speed is well organized data. This higgledy–piggledy fashion of putting an entire document in a column without breaking it down to its component sections does violate the first rule of data normalization. And that has …

The recent Mossack Fonesca “Panama Papers” hack is the latest security breach to drive home how much an impact an SQL injection can have on modern-day organizations. Though that hack ultimately revealed massive professional fraud by companies and governments around the world, it involved the exposure of 11.5 million confidential documents. The 2.6 terabytes of data stolen were a powerful reminder that the history of web-based business has been riddled with instances of SQL injections. They remain common and potentially devastating to organizations.

Other high-profile examples of SQL injection include an instance when NASA sites were hacked in 2009, yielding site administrator info; when …

A MariaDB support customer recently asked me what would happen if a Data Definition Language (DDL) statement failed to complete on one or more nodes in MariaDB Galera Cluster. In this blog post, I will demonstrate what would happen. The demonstration below was performed on a 2-node cluster running MariaDB 10.1, but other Galera Cluster distributions should work similarly. Schema ... Read More

Percona announces the release of Percona Monitoring and Management 1.0.2 Beta on 28 July 2016.

Like prior versions, PMM is distributed through Docker Hub and is free to download. Full instructions for download and installation of the server and client are available in the documentation.

Notable changes to the tool include:

• Upgraded to Grafana 3.1.0.
• Upgraded to Prometheus 1.0.1.
• Set default metrics retention to 30 days.
• Eliminated port 9001. Now the container uses only one configurable port, 80 by default.
• Eliminated the need to specify ADDRESS variable …

Join Brent Compton, Kyle Bader and Yves Trudeau on August 2, 2016 at 10 am PDT (UTC-7) for a MySQL and Ceph webinar.

Many operators select OpenStack as their control plane of choice for providing both internal and external IT services. The OpenStack user survey repeatedly shows Ceph as the dominant backend for providing persistent storage volumes through OpenStack Cinder. When building applications and repatriating old workloads, developers are discovering the need to provide OpenStack infrastructure database services. Given MySQL’s ubiquity, and it’s reliance on persistent storage, it is of utmost importance to understand how to achieve the performance demanded by today’s applications. Databases like MySQL can be incredibly IO …

Recently, I was discussing with one of my colleagues about how insert statement performs for MySQL partitioned tables. General prediction is that it should be slower than for non-partitioned tables, but how much that we didn’t know. So, I thought let’s test with different types of partitions (i.e range, list and hash) and also with different number of partitions and check how’s performance. As people says, MySQL 5.7 is must faster than old one, so I also tested partitions with it.

So, I took simple table with 3.2M records on Centos 6.7 VM (4 core with 2GB RAM) with default my.cnf settings and then created tables for range, list and hash partitioning with 5,25,50 and 100 partitions. i.e with 5 partition (range and list), the table structures were like

CREATE TABLE emp_range_5(
 id int,
 fname varchar (30),
 lname varchar (30),
 hired_date date not null,
 separated_date date not null,
 job_code int,
 store_id int
 ) …

This blog post lists the Percona Live Europe Amsterdam 2016 tutorial schedule.

We are excited to announce that the tutorial schedule for the Percona Live Europe Amsterdam Open Source Database Conference 2016 is up!

The Percona Live Europe Amsterdam Open Source Database Conference is the premier event for the diverse and active open source community, as well as businesses that develop and use open source software. The conferences have a technical focus with an emphasis on the core topics of MySQL, MongoDB, and other open source databases. Tackling subjects such as analytics, architecture and design, security, operations, …

This blog post will detail the results of Samsung storage in

tpcc-mysql

 benchmark using Percona Server.

I had an opportunity to test different Samsung storage devices under tpcc-mysql benchmark powered by Percona Server 5.7. You can find a summary with details here https://github.com/Percona-Lab-results/201607-tpcc-samsung-storage/blob/master/summary-tpcc-samsung.md

I have in my possession:

• Samsung 850 Pro, 2TB: This is a SATA device and is positioned as consumer-oriented, something that you would use in a high-end user desktop. As of this post, I estimate the price of this device as around $430/TB.
• …

Introduction

The early architecture of Uber consisted of a monolithic backend application written in Python that used Postgres for data persistence. Since that time, the architecture of Uber has changed significantly, to a model of microservices and new data platforms. …

The post Why Uber Engineering Switched from Postgres to MySQL appeared first on Uber Engineering Blog.