After installing a MySQL database server and securing that installation with the mysql_secure_installation tool, you are locked out from remote access to perform any operation on the server. Since we all like the 'R' in RDBMS to stand for remote as well as relational, let's see how we can configure user credentials to provide remote access to the database server but still keep those credentials

In my recent benchmarks for MongoDB, we can see that the two engines WiredTiger and TokuMX struggle from periodical drops in throughput, which is clearly related to a checkpoint interval – and therefore I correspond it to a checkpoint activity.

The funny thing is that I thought we solved checkpointing issues in InnoDB once and for good. There are bunch of posts on this issue in InnoDB, dated some 4 years ago.  We did a lot of research back then working on a fix for Percona Server

• https://www.percona.com/blog/2011/04/04/innodb-flushing-theory-and-solutions/
• …

Combining Galera and asynchronous replication in the same MariaDB setup, aka Hybrid Replication, can be useful - e.g. as a live backup node in a remote datacenter or reporting/analytics server. We already blogged about this setup for Codership/Galera or Percona XtraDB Cluster users, but master failover did not work for MariaDB because of its different GTID approach. In this post, we will show you how to deploy an asynchronous replication slave to MariaDB Galera Cluster 10.x (with master failover!), using GTID with ClusterControl v1.2.10. 

Preparing the Master

First and foremost, you must ensure that the master and slave nodes are running on MariaDB Galera 10.0.2 or later. MariaDB replication slave requires at least a master with GTID among the Galera nodes. However, we would recommend users to configure …

VividCortex is sponsoring and exhibiting at AWS Re:Invent October 6 - 9 this year. We will be serving up hats and database monitoring demos, so come check us out!

Click here for more details and registration.

I have been working for a very large Australian website for over six years and during this period have been fortunate enough to hire many Infrastructure Operations Engineers that now work for that company. I want to detail the evolution of the hiring process and what I have driven it to over the last six years.
How was I hired This is the interview process I went through at my current company:

• A technical and cultural pre-screening from a recruiter
• A short phone interview with a small set of adhoc questions around technical skill set. How does DNS work?
• An hour long face to face interview with the hiring manager and another senior engineer testing both technical capability and culture fit
• Another hour long face to face interview with a HR representative testing cultural fit 
• Lastly, a reference check to confirm technical capability and cultural fit performed over …

http://dom.as/2015/07/30/on-order-by-optimization/

An insightful exploration by Domas (Facebook) on how some of the MySQL optimiser’s decision logic is sometimes naive, in this case regarding ORDER BY optimisation.

Quite often, “simple” logic can work better than complex logic as chasing all the corner cases can just make things worse – but sometimes, logic can be too simple.

Everything must be made as simple as possible, but no simpler.
— Albert Einstein / Roger Sessions

VividCortex is sponsoring and exhibiting at Percona Live EU in Amsterdam September 21 - 23rd. Stop by our booth to get a free product demo and see how we can revolutionize your database monitoring.

Baron Schwartz will also be speaking on Redis Eye for the MySQL Guy, so be sure to learn from his experience.

Click here for more details and registration.

This Log Buffer Edition throws spotlight on some of the salient blog posts from Oracle, SQL Server and MySQL.

Oracle:

• STANDARD date considerations in Oracle SQL and PL/SQL
• My good friend, Oracle icon Karen Morton passed away.
• Multiple invisible indexes on the same column in #Oracle 12c
• Little things worth knowing: Data Guard Broker Setup changes in 12c …

Fri, 2015-07-31 12:14guillaumelefranc

Mandatory disclaimer: the techniques described in this blog post are experimental, so use at your own risk. Neither me nor MariaDB Corporation will be held responsible if anything bad happens to your servers.

Context

MaxScale 1.2.0 and above can call external scripts on monitor events. In the case of a classic Master-Slave setup, this can be used for automatic failover and promotion using MariaDB Replication Manager. The following use case is exposed using three MariaDB servers (one master, two slaves) and a MaxScale server. Please refer to my Vagrant files if you want to jumpstart such a testing platform.

Requirements

• A mariadb-repmgr binary, version 0.4.0 or above. Grab it from the github Releases page, and extract in /usr/local/bin/ on your MaxScale server. …

 Article on Information Age:

From obscurity to the mainstream, the journey of MySQL shows the power of the open source community to drive innovation. Read the full article here: http://goo.gl/bqFZPb