Welcome to a new series of blogs: Percona Live featured tutorial speakers! In these blogs, we’ll highlight some of the tutorial speakers that will be at this year’s Percona Live conference. We’ll also discuss how these tutorials can help you improve your database environment. Make sure to read to the end to get a special Percona Live 2017 registration bonus!

In this Percona Live featured tutorial, we’ll meet Giuseppe Maxia, Quality Assurance Architect at VMware. His tutorial is on MySQL Document Store: SQL and NoSQL United. MySQL 5.7 introduced document store, which allows asynchronous operations …

Related resources  Customizing your database backups with ClusterControl  Become a ClusterControl DBA - Safeguarding your data  Webinar: Become a MySQL DBA - Backups  Download ClusterControl

This week we’re happy to announce that our new DevOps Guide to Database Backups for MySQL & MariaDB is now available for …

Dear MySQL users,

MySQL Connector/Python 2.1.5 GA is a third GA version of 2.1 release
series of the pure Python database driver for MySQL. It can be used for
production environments.

MySQL Connector/Python version 2.1.5 GA is compatible with MySQL Server
versions 5.5 and greater. Python 2.6 and greater as well as Python 3.3
and greater are supported. Python 2.4, 2.5 and 3.1, 3.2 are not
supported.

MySQL Connector/Python 2.1.5 is available for download from:

http://dev.mysql.com/downloads/connector/python/#downloads

The ChangeLog file included in the distribution contains a brief summary
of changes in MySQL Connector/Python 2.1.5. For a more complete list of
changes, see below or online at:

…

After MySQL installation, If you don’t have any enterprise level / any GUI interface for monitoring, backup then one of the option is, write your own scripts to automate these tasks.
In this Blog post, we are going to see few monitoring and backup scripts with covering common security issues.

• Credential security
• mysql_config_editor and Credential security
• Monitoring scripts
• backup scripts

Credential security

Following is a simple script, which will monitor MySQL service. In case MySQL …

How to solve mysqld service restart problem for above error?

Problem :
I was adding shell and home directory for mysql user,executed following cmd,

shell> usermod -m -d /home/mysql -s /bin/bash mysql

If mysql is running and process running with mysql , we need to stop mysql otherwise it will throw an error like usermod: user mysql is currently used by process 27768

After stopping MySQL service and adding shell and homedir for mysql user, at the time mysqld service startup it started throwing error.

shell> service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
Shell> systemctl status mysqld.service

● mysqld.service - MySQL Server
Loaded: loaded …

In this blog post, we’ll discuss the differences between row store and column store databases.

Clients often ask us if they should or could be using columnar databases. For some applications, a columnar database is a great choice; for others, you should stick with the tried and true row-based option.

At a basic level, row stores are great for transaction processing. Column stores are great for highly analytical query models. Row stores have the ability to write data very quickly, whereas a column store is awesome at aggregating large volumes of data for a subset of columns.

One of the benefits of a columnar database is its crazy fast query speeds. In some cases, queries that took minutes or hours are completed in seconds. This makes columnar databases a good choice in a query-heavy …

Last time we looked at a simple example program using the X Devapi and Node.JS. This time lets look at the Python version. Well, not actually the same. This time instead of looking for the Canadian record, the program limits the query to the first two records found.

Besides Python 2.7, you will need to install the Google Protobuf code plus the development release of the Python Connector and a recent version of MySQL 5.7.

The Code

import mysqlx

session = mysqlx.get_session({          # Authenticate to server
  'host':       'localhost',
  'port':       33060,
  'user':       'dstokes',
  'password':   'S3cR3t%'})

# Connect to Schema 'world_x'
schema = session.get_schema('world_x');

# Set collection to 'countryinfo'
collection = …

Percona announces the release of Percona XtraDB Cluster 5.6.34-26.19 on December 14, 2016. Binaries are available from the downloads section or our software repositories.

Percona XtraDB Cluster 5.6.34-26.19 is now the current release, based on the following:

• Percona Server 5.6.34-79.1
• Galera Replication library 3.19
• wsrep API version 26

All Percona software is open-source and free. Details of this …

Any DBA who has administered a busy master knows how fast the disk space occupied by binary logs may grow.  DBAs have no control on this: the growth depends on the workload, and the workload depends on many factors, e.g.:

- application changes (the applications start writing more due to code changes) - traffic changes (the peak season arrive, your workload doubles in size) - infrastructure changes (the devops add more servers) - business changes (new business flows adds to existing workload)
So either you have being thoughtful and have planned in advance for a large enough storage space (to handle the increase in number of binary logs), or,  sooner or later, you will face the usual dilemma - how many retention days dare you give up to accommodate for the binlog growth?
In my case, I was very thoughtful, but the boss didn't listen and gave me servers with very limited binlog storage space and, more important, …

We’ll show you, how to set up MySQL Cluster on Ubuntu. The MySQL NDB Cluster integrates the standard MySQL server with an in-memory clustered storage engine called NDB (Network DataBase). We will use a total of 4 virtual servers, one for the management, one SQL node and two data nodes: 172.16.1.1 – management VPS 172.16.1.2 […]