Join Percona’s MySQL Practice Manager Kenny Gryp and QA Engineer, Ramesh Sivaraman as they present a high availability webinar around Percona XtraDB Cluster, Galera Cluster, MySQL Group Replication on Wednesday, June 21, 2017 at 10:00 am PDT / 1:00 pm EDT (UTC-7).

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What are the implementation differences between Percona XtraDB Cluster 5.7, Galera Cluster 5.7 and MySQL Group Replication?

• How do they work?
…

This blog post looks at the recent MariaDB Server 10.2 GA release.

Congratulations to the MariaDB Foundation for releasing a generally available (GA) stable version of MariaDB Server 10.2! We’ll definitely spend the next few weeks talking about MariaDB Server 10.2, but here’s a quick overview in the meantime. Keep in mind that when thinking about compatibility, this is meant to be the equivalent of MySQL 5.7 (GA: October 21, 2015, with Percona Server for MySQL 5.7 GA available February 23, 2016).

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Please join Continuent Webinar on Wednesday, June 21 at 9:00 AM PDT/noon EDT: https://attendee.gotowebinar.com/register/3559980439748889090.

Continuent customers have a large number deployments in AWS running MySQL on AWS EC2 instances and they choose to rely upon Tungsten Clustering to provide High Availability (HA) and Disaster Recovery (DR). We also support Multi-Site/Multi-Master operations

Opps!I admit my JavaScript skills are rusty and dusty. Plus I am new to Node.JS. So yesterdays blog drew some very helpful comments from two of MySQL's best. Johannes Schlüter and Rui Quelhas let me know there was a better way to code the example. Much thanks to them. Better Example

// Simple example to grap one record and print it
const mysqlx = require('@mysql/xdevapi');
const options = {
  host: 'localhost',
  port: 33060, // should be a number
  dbUser: 'root',
  dbPassword: 'Hell0Dave!'
};

mysqlx
  .getSession(options)
  .then (session => {
  var schema = session.getSchema('world_x');

//equivilent of SELECT doc FROM countryinfo where _id = 'USA'
  var coll = schema.getCollection('countryinfo');
  var query = "$._id == 'USA'";

      // Print doc 
     return Promise.all([
       coll.find(query).execute(function (doc) {
       console.log(doc); …

In May, I presented two talks – one called “Are you getting the best out of your indexes?” and “Optimizing Queries Using EXPLAIN”. I now have slides and video for both of them.

The first talk about indexing should probably be titled “Why is MySQL doing this?!!?!!?” It gives insight into why the MySQL optimizer chooses indexes that you do not expect; especially when it does not use an index you expect it to.

The talk has something for everyone – for beginners it explains B-trees and how they work, and for the more seasoned DBA it explains concepts like average value group size, and how the optimizer uses those concepts applied to metadata to make decisions.

Slides are at http://technocation.org/files/doc/2017_05_MySQLindexes.pdf.
Click the slide image below to go to the video at …

My first encounter with the gdb command duel was on some old IRIX about 15 years ago. I immediately loved how convenient it was for displaying various data structures during MySQL debugging, and I wished Linux had something similar. Later I found out that Duel was not something IRIX specific, but a public domain patch […]

The post Duel: gdb vs. linked lists, trees, and hash tables appeared first on MariaDB.org.

JavaScript and MySQLLast time I looked at using the new MySQL Shell in JavaScript mode to access documents. I promised that I would look at indexes this time but a few folks wanted to see how to use the MySQL Document Store with Javascript -- the language not the MySQL Shell mode-- specifically with the Node.JS connector. And they ask for a very simple example. So Indexes in the future, Node.JS now.

So this is a simple on using the MySQL Document Store from Node.JS.

InstallDownload the Node.JS connector and then follow the very simple installation instructions. And use your OS's instictions for installing Node.JS.

The documentation on using the Node.JS Connector with the …

The Debian project has today announced their 9th release, code named “Stretch”. This is a big milestone for MariaDB, because the release team decided to ship and support only one MySQL variant in this release, and MariaDB was chosen over MySQL. This is prominently mentioned in the press release about Debian 9 and more information […]

The post Debian 9 released with MariaDB as the only MySQL variant appeared first on MariaDB.org.

This is a story about why it's a good idea to test and verify the behavior of new software releases, even if the change log says that a particular bug was already fixed.
Background MySQL 5.6 and 5.7 both support the following CREATE USER syntax:

CREATE USER 'user'@'host'
  IDENTIFIED BY 'password';

This syntax create a user with the default authentication plugin (mysql_native_password unless configured otherwise) and the password provided. The IDENTIFIED BY syntax is also supported for GRANT command.
Both major versions also support the following syntax:

CREATE USER 'user'@'host'
  IDENTIFIED WITH mysql_native_password AS 'hash_string';

The password hash for "passw0rd" is "*74B1C21ACE0C2D6B0678A5E503D2A60E8F9651A3", you might then expect that the effects of the …

This Log Buffer Edition encompasses few of the nifty blog posts from Oracle, SQL Server and MySQL.

Oracle:

Introduction to Oracle Big Data Cloud Service

Interpreting wpad.dat using jrunscript from JDK 8 to work out the right proxy.

Nice Trick to Get ADF LOV Description Text

Presentation: Dynamic Actions, Javascript, & CSS for APEX Beginners

E4 Session …