On the same day last year, I wrote a post about replication filters in MySQL Multi Source Replication and whether we can set the filters per replication channel or not (Bug #80843). My feature request – as well as some others – has been implemented in MySQL 8.0.1. Thanks Oracle for the implementation. (Full list of changes can be checked out here)

In this post, I’ll demonstrate how to set replication filters per channel in MySQL Multi Source Replication.

Setting up and configuring Multi Source …

Backup traffic

After securing application-to-database and replication traffic, you should also do the same for backup traffic.

If you use Percona XtraBackup with streaming than you should use SSH to send your backup to a secure location. The same is true for MySQL Enterprise Backup. Also both have options to encrypt the backup itself. If you send your backup to a cloud service this is something you should really do, especially if it is not sent via SSH or HTTPS.

And mysqldump and mysqlbinlog both support SSL. And you could use GnuPG, OpenSSL, WinZIP or any other tool to encrypt it.

Sending credentials

You could try to force the client to send credentials elsewhere. This can be done if you can control the parameters to the mysql client. It reads the config from /etc/my.cnf, ~/.my.cnf and ~/.mylogin.conf but if you for example specify a login-path and a hostname.. it connects to that host, but with the …

As part of our support services, we do a lot of query optimization. This is where most performance gains come from. Here’s an example of the work we do.

Some days ago a customer arrived with the following table:

CREATE TABLE `infamous_table` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `member_id` int(11) NOT NULL DEFAULT '0',
  `email` varchar(200) NOT NULL DEFAULT '',
  `msg_type` varchar(255) NOT NULL DEFAULT '',
  `t2send` int(11) NOT NULL DEFAULT '0',
  `flag` char(1) NOT NULL DEFAULT '',
  `sent` varchar(100) NOT NULL DEFAULT '',
  PRIMARY KEY (`id`),
  KEY `f` (`flag`),
  KEY `email` (`email`),
  KEY `msg_type` (`msg_type`(5)),
  KEY `t_msg` (`t2send`,`msg_type`(5))
) ENGINE=InnoDB DEFAULT CHARSET=latin1

And a query that looked like this:

SELECT COUNT(*)
  FROM `infamous_table`
 WHERE `t2send` > 1234
   AND …

In an earlier blog post I wrote "MySQL has far better support for character sets and collations than any other open-source DBMS, except sometimes MariaDB."

That's no longer always true, because ICU.

ICU -- International Components for Unicode -- was a Sun + IBM initiative that started over 20 years ago, and has become a major component of major products. The key advantage is that it provides a lax-licensed library that does all the work that's needed for the Unicode Collation ALgorithm and the CLDRs. No competitive products do that.

When I was with MySQL we considered using ICU. We decided "no". We had good reasons then: it didn't do anything new for the major languages that we already handled well, it seemed to …

The MySQL Windows Experience Team is proud to announce the release of MySQL for Visual Studio 1.2.7. This is a maintenance release for 1.2.x. It can be used for production environments.

MySQL for Visual Studio is a product that includes all of the Visual Studio integration functionality to create and manage MySQL databases when developing .NET applications.

MySQL for Visual Studio is installed using the MySQL Installer for Windows which comes in 2 versions:

• Full (352.8 MB) which includes a complete set of MySQL products with their binaries included in the downloaded bundle.
• Web (1.7 MB – a network install) which will just pull MySQL for Visual Studio over the web and install it when run.

You can download MySQL Installer from our official Downloads page at …

MySQL 8.0.1 has just been released with a wonderful set of features across the board. Specifically in replication, there is plenty of new and exciting functionality as well as performance improvements.  In this post I am going to summarize the replication features of this development milestone release.…

MySQL 8.0.1 is out and it includes an implementation of my feature request (Bug #77438).  This extension to RESET MASTER allows to simplify master promotion with Binlog Servers.  Let's see how it works:

# mysql -N <<< "SHOW MASTER STATUS" binlog.027892 3006935 # mysql -N <<< "RESET MASTER TO 12345; DO sleep(rand()*10); SHOW MASTER STATUS" binlog.012345 92773 # mysql -N <<< "RESET MASTER TO

Performing regular backups of your database cluster is imperative for high availability and disaster recovery. If for any reason you lost your entire cluster and had to do a full restore from backup, you would need a reliable and up-to-date backup to start from.

Best Practices for Backups

Some recommendations to consider for a good scheduled backup regime:

• You should be able to completely recover from a catastrophic failure from at least two previous full backups. Just in case the most recent full backup is damaged, lost, or corrupt,
• Your backup should contain at least one full backup within a chosen cycle, normally weekly,
• Store backups away from the current data location, preferably off site,
• Use a mixture of mysqldump and Xtrabackup for extra safety, and not rely on one method,
• Test restore your backups on a regular basis, e.g. every two months.

The MySQL Development team is happy to announce our 8.0.1 development milestone release (DMR), now available for download at dev.mysql.com. (8.0.1 adds features to 8.0.0). The source code is available at GitHub. You can find the full list of changes and bug fixes in the 8.0.1 Release Notes.…

MySQL Server 5.7.18, 5.6.36, and 5.5.55, new versions of the popular Open Source Database Management System, have been released. These releases are recommended for use on production systems. For an overview of what’s new, please see http://dev.mysql.com/doc/refman/5.7/en/mysql-nutshell.html http://dev.mysql.com/doc/refman/5.6/en/mysql-nutshell.html http://dev.mysql.com/doc/refman/5.5/en/mysql-nutshell.html For information on installing the release on new servers, please see the MySQL installation documentation at […]