We have been looking at the WebScaleSQL project with great excitement. As with any new enhancements to the MySQL world, we need to test extensively to ensure we can give PSCE customers the best advice possible. Since this project is source only, we decided to add WebScaleSQL builds to our repo, so we could examine the changes being introduced by all the different collaborators.

So what is WebscaleSQL?

WebScaleSQL is a collaboration among engineers from several companies that face the same challenges in deploying MySQL at scale, and seek greater performance from a database technology tailored for their needs.

— WebScaleSQL, Frequently Asked Questions

What makes this project so special, is the level of collaboration between some of the most …

A customer asked whether we they could have 10 or more masters consolidate all the data into a single central slave. After getting a bit more information from them and seeing the application functionality, it was clear that MySQL Labs 5.7.5 Multi Source Replication could be a good candidate. Why?:
– Each master is independent from the rest of the masters.
– One-way traffic: there is only one way to update a row, and that’s from the master.
– All the masters use the same schema and table, but no single master will ever need to, nor be able to update a row from another master.
– PK determined via app & master env.

Multisource replication is still in http://labs.mysql.com, but here’s what I did to test it out.

First, I read:
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We have gathered  Galera related presentations for you to choose from (click the title for more information)

Big Transactions on Galera Cluster,  15 April 2:00PM – 2:50PM @ Ballroom B (click here for more info)

Seppo Jaakola,  CEO, Codership

Big and long term transactions have traditionally not behaved well in Galera Cluster. Large replication data sets have resulted in symptoms like elevated conflict rate, increased memory consumption, even OOM kill may happen, flow control pausing, cluster freezing… To deal with these issues, Galera users have been adviced to split large transactions in “reasonable size”. There is also cluster configuration option for rejecting too large transactions, as a safe guard.

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January 30, 2015 By Severalnines

Thanks to everyone who participated in these two sessions this week! Please see below for details on next week’s follow up session 'Performance Tuning for HAProxy & MySQL'.

The topics covered this week included: 

• What is HAProxy?
• SQL Load balancing for MySQL
• Failure detection using MySQL health checks
• High Availability with Keepalived and Virtual IP
• Use cases: MySQL/MariaDB Galera Cluster, MySQL NDB Cluster …

Following on the heels of last week’s update to the Java client, the MariaDB project is pleased to today announce updates to both MariaDB Connector/C and Connector/ODBC. They are both Stable (GA) releases.

See the Release Notes and Changelogs for detailed information on each of these releases and contain many bug fixes and enhancements.

Download Connector/C 2.1.0

Release Notes Changelog

About MariaDB Connector/C

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This Log Buffer Edition covers various innovative blog posts from various fields of Oracle, MySQL and SQL Server. Enjoy!!!

Oracle:

A user reported an ORA-01114 and an ORA-27069 in a 3rd party application running against an Oracle 11.1 database.

Oracle SOA Suite 12c: Multithreaded instance purging with the Java API.

Oracle GoldenGate for Oracle Database has introduced several features in Release 12.1.2.1.0.

Upgrade to 12c and Plugin – one fast …

Users seeking high availability, disaster recovery and zero downtime maintenance operation for business-critical MySQL applications face confusing choices. Is multi-master or master/slave clustering better? What about synchronous versus asynchronous replication? Using a plain vanilla, stock MySQL or a modified version of it? Which of these choices are right for data-driven businesses that

Download MariaDB Galera Cluster 10.0.16

Release Notes Changelog What is MariaDB Galera Cluster?

MariaDB APT and YUM Repository Configuration Generator

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.16. This is a Stable (GA) release.

See the …

Hi there, it’s been a few months since Percona Live London has finished, but I managed just now to get sometime to post the slides from my presentation about backups. Please, take a look and feel free to comment.

Pdf Version

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Cloud security company Qualys announced Tuesday the issues prevalent in glibc since version 2.2 introduced in 2000-11-10 (the complete Qualys announcement may be viewed here). The vulnerability, CVE-2015-0235, has been dubbed “GHOST.”

As the announcement from Qualys indicates, it is believed that MySQL and by extension Percona Server are not affected by this issue.

Percona is in the process of conducting our own review into the issue related to the Percona Server source code – more information will be released as soon as it is available.

In the interim the current advisory is to update your glibc packages for your distributions if they are in fact vulnerable. The C code from the Qualys announcement may aid in your diagnostics, section 4 of …