Let us show you how to install MySQL on your CentOS 7 server. MySQL is a relational database management system that functions through the use of a query system. Created in 1995, it’s an open-source project that is currently developed by Oracle, and has existed since 1995. It’s fast, written in C and C++, and […]
Nicolas Tobias has written an awesome guide to setting up replication from MariaDB to Hadoop/HDFS using Tungsten Replicator, in Spanish! He’s planning more of these so if you like what you see, please let him know!
Semana santa y yo con nuevas batallas que contar.
Me hayaba yo en el trabajo, pensando en que iba a invertir la calma que acompa;a a los dias de vacaciones que libremente podemos elegir trabajar y pense: No seria bueno terminar esa sincronizacion entre los servidores de mariaDB y HIVE?
Ya habia buscado algo de info al respecto en Enero hasta tenia una PoC montada con unas VM que volvi a encender, pero estaba todo podrido: no arrancaba, no funcionba ni siquiera me acordaba como lo habia hecho y el history de la shell er un galimatias. Decidi que si lo rehacia todo desde cero iba a poder dejarlo escrito en un playbook y ademas, aprenderlo y automatizarlo hasta el limite de poder desplegar de forma automatica on …[Read more]
The Madrid MySQL Users Group has been a bit quiet recently so we thought it would be good to have a meeting again. The next meeting will take place next on Wednesday, 25th April and will cover Galera Cluster (Presentation by Emanuele Mottola). We will also talk about MySQL 8.0 and any latest updates that […]
“The single most important lesson I’ve learned is to keep it simple. I find designers sometimes deliver over-complex, generic solutions that could (in theory) do anything, but in reality are remarkably difficult to operate, and often misunderstood.”–John Ryan
I have interviewed John Ryan, Data Warehouse Solution Architect (Director) at UBS.
Q1. You are an experienced Data Warehouse architect, designer and developer. What are the main lessons you have learned in your career?
John Ryan: The single most important lesson I’ve learned is to keep it simple. I find designers sometimes deliver over-complex, generic solutions that could (in theory) do anything, but in reality are remarkably difficult to operate, and often misunderstood. I believe this stems from a lack of understanding of the …[Read more]
Have you ever forgotten your WordPress administrator password and did not have access to your e-mail account or haven’t configured your e-mail account properly in WordPress? Fear not, because in today’s tutorial we are going to learn how to reset the WordPress administrator password through the MySQL command prompt. Resetting WordPress Admin Password via MySQL Command […]
In this short blogpost, we’ll show you how to use the mysql_random_data_load tool to insert random data into tables. This is a great aide in testing when you have empty tables and need them to be populated with data. We’ve all done it manually (the INSERT INTO … VALUES … way), but that is surely a waste of time. It can add up to a lot if you need to test tables with many columns, or even worse, with foreign keys.
Before saying anything else, we would like to mention that this
tool is still under development, and that it will insert random
data into tables. Be aware if running it in a
mysql_random_data_load is a tool created by …[Read more]
In 2017 we have welcomed many new customers into the Percona fold. It’s always interesting to find out what challenges the Percona team helped them to address and how they chose their relationship with Percona. As unbiased champions of open source database software, our consultancy, support and managed services staff apply their expertise across a wide range of technologies. Here are just a few stories from the past year.
Scaling applications on Amazon RDS the right way
Specializing in on-demand transportation services, Grab needed a high-availability, high performing database engine to serve their rapidly growing application. Grab operates in over 30 densely populated …[Read more]
If that title looks familiar, it is because a few months ago I posted about LDAP with auth_pam and PHP to authenticate against MySQL.
The good news is that recompiling the connector for Python is a lot easier than for PHP. With PHP, the complexity was due to there being one monolithic package to recompile. The bad news is that there is a slight hitch with Python.
Skip down to the hitch and how to compile MySQLdb for use with auth_pam plugin.
As a quick reminder, here is a repeat of the background:
There are two plugins that can be used. From the documentation, the two plugins are:
- Full PAM plugin called auth_pam. This plugin uses …
Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.
The Percona Live Call For Papers closes on December 22, but why aren’t you submitting already? Don’t wait till the last minute! Look at our broad scope as well. Worth noting that the best prices for tickets are available now until January 7.
FOSDEM is happening in Brussels, Belgium (like it has for the past many years). All I can say is that the schedule is out, and it was very hard to make a choice! See the …[Read more]
Semi-sync Replication is a plugin
available for mysql which allows you to create more durable
replication topologies. For instance you can ensure that in
the event of a master crash that at least one of your replicas
has all transaction currently written to the master so that when
you promote, you know you're not missing any data.
That's a huge simplification.
What's the downside? Write speed. If a transaction on your master have to wait until a replica acknowledges it has that transaction, then there is going to be some delay. Not only that, but your network latency between the two points matters a lot. If you want greater durability, the cost is performance.
It's important to note that the master doesn't wait until the replica actually runs the transaction on the …