MySQL ShellCLI Interfaces are usually boring, ASCII-ish functional interfaces that are as about as exciting as paint drying or end user license agreements for your rice steamer. They get the job done but no excitement. The new MySQL Shell (mysqlsh instead of mysql at the command line is a great new tool but like its predecessor it is not exactly visually dynamic.

Until Now.

At labs.mysql.com there is a new version of the MySQL Shell that adds some new functionality and some visual enticements. I was in a session at Oracle OpenWorld and was impressed by not only the visually stunning upgrade but by the fact that we now get command auto-completion!

You can login as you did with the old shell but then you see that little bit …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Percona Live Europe 2017 Dublin

We’ve spent a lot of time in the last few months organizing Percona Live Europe Dublin. I want to thank all the speakers, sponsors and attendees for helping us to pull off yet another great event. While we’ll provide some perspectives, thoughts and feedback soon, all the early mornings, jam-packed meetings and the 4 am bedtimes means I’ll probably talk about this event in my next column!

In the meantime, save the date for …

In my previous article about roles I said that one of the problems with role usage is that roles need to be activated before they kick in. Let's recap briefly what the problem is:

## new session, as user `root`

mysql [localhost] {root} ((none)) > create role viewer;
Query OK, 0 rows affected (0.01 sec)

mysql [localhost] {root} ((none)) > grant select on *.* to viewer;
Query OK, 0 rows affected (0.01 sec)

mysql [localhost] {root} ((none)) > create user see_it_all identified by 'msandbox';
Query OK, 0 rows affected (0.01 sec)

mysql [localhost] {root} ((none)) > grant viewer to see_it_all;
Query OK, 0 rows affected (0.01 sec)

## NEW session, as user `see_it_all`

mysql [localhost] {see_it_all} ((none)) > use test
ERROR 1044 (42000): Access denied for user 'see_it_all'@'%' to database 'test'

mysql [localhost] {see_it_all} ((none)) > show grants\G …

For most people (including me until recently) database XA transactions are a fuzzy concept. In over eight years with Percona, I have never had to deal with XA transactions. Then a few weeks ago I got two customers having issues with XA transactions. That deserves a post.

XA 101

What are XA transactions? XA transactions are useful when you need to coordinate a transaction between different systems. The simplest example could be simply two storage engines within MySQL. Basically, it follows this sequence:

1. XA START
2. Some SQL statements
3. XA END
4. XA PREPARE
5. XA COMMIT or ROLLBACK

Once prepared, the XA transaction survives a MySQL crash. Upon restart, you’ll see something like this in the MySQL error log:

2017-08-23T14:53:54.189068Z 0 [Note] …

MySQL databases power your business, and every minute of downtime has costs. High availability is essential and you can minimize risk with MySQL Group Replication.

The post Minimizing Risk with MySQL Group Replication appeared first on Datavail.

High availability is necessary for organizations to compete. This blog post shows the tools for for MySQL databases and how we can help configure and deploy.

The post The Mechanics of High Availability appeared first on Datavail.

The website or mobile app is the storefront for participating in the modern digital era. It’s your portal for inviting users to come and survey your products and services. Much attention focuses on front-end development; this is where the HMTL5, CSS, and JavaScript are coded to develop the landing page that everyone sees when they visit your site.

But the real magic happens on the backend. This is the ecosystem that really powers your website. One writer has articulated this point very nicely as follows:

The technology and programming that “power” a site—what your end user doesn’t see but what makes the site run—is called the back end. Consisting of the server, the database, and the server-side applications, it’s the behind-the-scenes functionality—the brain of a site. …

By default for MySQL server, InnoDB Engine is getting used widely due it’s ACID support, optimized read-write performance and for many other reasons which are great significance for the database server.

In this blog post, we are going to cover the InnoDB tablespace and its features like,

• InnoDB engine tablespaces
• Tablespace Data Encryption
• Tablespace related Configuration

InnoDB engine tablespaces System tablespace:  

Common tablespace for MySQL server operations. Apart from the table data storage, InnoDB’s functionality requires looking for table metadata, storing and retrieving MVCC info to support ACID compliance and Transaction Isolation. It contains several types of information for InnoDB objects.

• Contains:
  Table Data Pages
  Table Index Pages …

Many organizations are shifting toward the cloud, but how much are they moving over? New post explains top five reasons to move your MySQL database to AWS EC2.

The post Top 5 Reasons to Move MySQL to AWS EC2 appeared first on Datavail.

I’ve had some questions from people using MySQL Cluster GPL and wanting to move to using MySQL Cluster Carrier Grade Edition, i.e., they want to use MySQL Cluster Manager, MCM, to make their lives much easier, in particular, upgrading (as well as config change ease and backup history).

All I want to do here is to share with you my personal experience on migrating what’s considered a ‘wild’ NDB Cluster to a MCM managed cluster. It’s just as simple to follow the manual chapter Importing a Cluster into MySQL Cluster Manager so at least you can see how I did it, and it might help someone.

[ If you’re not migrating but just looking for further information on NDB Cluster, and came across this post, please please PLEASE look at the …