In my last post, I gave a technical explanation of the performance characteristics of partitioned collections in TokuMX 1.5 (which is right around the corner) and partitioned tables in relational databases. Given those performance characteristics, in this post, I will present some best practices when using this feature in TokuMX or TokuDB. Note that these best practices are designed for TokuMX and TokuDB only, which use …

In this post I would like to review how my dumper for MySQL works from the point of view of locks. Since 0.6 serie we have different options, so I will try to explain how they work

As you may know mydumper is multithreaded and this adds a lot of complexity compared with other logical backup tools as it also needs to coordinate all threads with the same snapshot to be consistent. So let review how mydumper does this with the default settings.

By default mydumper uses 4 threads to dump data and 1 main thread

Main Thread

• FLUSH TABLES WITH READ LOCK

Dump Thread X

• START TRANSACTION WITH CONSISTENT SNAPSHOT;
• dump non-InnoDB tables

Main Thread

• UNLOCK TABLES

Dump Thread X

• dump InnoDB tables

As you can see in this case we need FTWRL for two things, coordinate transaction’s snapshots …

MySQL 5.5.38 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://downloads.skysql.com/archive/index/p/mysql/v/5.5.38

This release, similar to the last 5.5 release, is mostly uneventful.

Out of the mere 13 bugs, most were benign, but I thought there were two worth mentioning (just because one is a slight performance improvement for InnoDB, and the other relates to slave consistency, so always important to see if it could affect you):

1. InnoDB: For each insert, memset would be called three times to allocate memory for system fields. To reduce CPU usage, the three memset calls are now combined into a single call. (Bug #17858679, Bug #71014)
2. Replication: When …

Tungsten Replicator is an innovative and reliable open source tool that can solve your most complex MySQL replication problems. In this webinar we will introduce Replicator installation and show you how to use key Replicator features effectively with MySQL.  

Replication is a powerful technology that takes knowledge and planning to use effectively. This webinar gives you the background that

FairWarning® solutions have audited well over 120 billion events, each of which was processed and stored in a MySQL database. FairWarning is the world's leading supplier of privacy monitoring solutions for electronic health records, relied on by over 1,200 Hospitals and 5,000 Clinics to keep their patients' data safe. In January 2014, FairWarning was awarded the highest commendation in healthcare IT as the first ever Category Leader for Patient Privacy Monitoring in the "2013 Best in KLAS: Software & Services" report[1].

FairWarning has used MySQL as their solutions’ database from their start in 2005 to worldwide expansion and market leadership. FairWarning recently migrated their solutions from MyISAM to InnoDB and updated from MySQL 5.5 to 5.6. Following are some of benefits they’ve had as a …

Good MySQL talent is hard to find. Each day I get several ‘I am looking for a MySQL DBA’ or ‘MySQL Developer needed’. Long story short, post your opening on http://forums.mysql.com as it catches the most eyes of MySQL Professionals.

Percona is glad to announce the release of Percona XtraBackup 2.2.3 on June 12th 2014. Downloads are available from our download site here and Percona Software Repositories.

Percona XtraBackup enables backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, Percona XtraBackup drives down backup costs while providing unique features for MySQL backup. The new 2.2.3 …

MariaDB 5.5.38 was recently released (it is the latest MariaDB 5.5), and is available for download here:

https://downloads.mariadb.org/mariadb/5.5.38/

This is a maintenance release, and so there are not too many big changes of note, just a number of normal bug fixes. However, there are a few items worth mentioning:

• Includes all bugfixes and updates from MySQL 5.5.38
• XtraDB updated to the version from Percona Server 5.5.37-35.0
• TokuDB updated to version …

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.11. This is a Beta release.

See the Release Notes and Changelog for detailed information on this release and the What is MariaDB Galera Cluster? page in the MariaDB Knowledge Base for general information about MariaDB Galera Cluster.

Download MariaDB Galera Cluster 10.0.11

…

June 12, 2014 By Severalnines

We’re delighted to be joining Team MariaDB at SkySQL with a talk on ‘Automation & Management of Database Clusters’ as they tour across several European regions in the coming weeks.

Whether you’re a MariaDB enthusiast or newbie, a MySQL veteran or newbie, or even a MongoDB user who also happens to run MySQL or MariaDB databases: this roadshow is a good place to find out about the latest developments on the MariaDB database as well as related tools and technologies. 

From our own perspective, we’ll be updating participants on how to best automate & manage their database clusters, and demo some of the capabilities of …