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Displaying posts with tag: Development (reset)
Showing the hidden tables in MySQL 8 data dictionary

The freshly released MySQL 8.0 includes a data dictionary, which makes MySQL much more reliable. Thanks to this features, we don't have any '.frm' files, and querying the information_schema is 30x to 100x faster than previous versions.

One drawback of the implementation is that the data dictionary tables are hidden by design.

While the reason is fully understandable (they don't want to commit on an interface that may change in the future) many curious users are disappointed, because openness is the basis of good understanding and feedback.

The problem to access the dictionary tables can be split in three parts:

  • Finding the list of tables; …
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Introducing gh-ost: triggerless online schema migrations

I'm thoroughly happy to introduce gh-ost: triggerless, controllable, auditable, testable, trusted online schema change tool released today by GitHub.

gh-ost now powers our production schema migrations. We hit some serious limitations using pt-online-schema-change on our large volume, high traffic tables, to the effect of driving our database to a near grinding halt or even to the extent of causing outages. With gh-ost, we are now able to migrate our busiest tables at any time, peak hours and heavy workloads included, without causing impact to our service.

gh-ost supports testing in production. It goes a long …

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SQL injection in the MySQL server (of the proxy kind!)

As work on WarpSQL (Shard-Query 3) progresses, it has outgrown MySQL proxy.  MySQL proxy is a very useful tool, but it requires LUA scripting, and it is an external daemon that needs to be maintained.  The MySQL proxy module for Shard-Query works well, but to make WarpSQL into a real distributed transaction coordinator, moving the proxy logic inside of the server makes more sense.

The main benefit of MySQL proxy is that it allows a script to “inject” queries between the client and server, intercepting the results and possibly sending back new results to the client.  I would like similar functionality, but inside of the server.

For example, I would like to implement new SHOW commands, and these commands do not need to be implemented as actual MySQL SHOW commands under the covers.

For example, for this blog post I made a new example command called “SHOW PASSWORD

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Taking the MySQL document store for a spin

This is not a comprehensive review, nor an user guide. It's a step-by-step account of my initial impressions while trying the new MySQL XProtocol and the document store capabilities. In fact, I am barely scratching the surface here: more articles will come as time allows.

MySQL 5.7 has been GA for several months, as it was released in October 2015. Among the many features and improvements, I was surprised to see the MySQL team emphasizing the JSON data type. While it is an interesting feature per se, I failed to see the reason why so many articles and conference talks were focused around this single feature. Everything became clear when, with the release of MySQL 5.7.12, the MySQL team announced a new release model.


In …

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MariaDB in Google Summer of Code 2016

And for the fourth year in a row, MariaDB Foundation participates in the Google Summer of Code! The MariaDB Organization in GSoC is an umbrella organization for all projects that belongs to the MariaDB ecosystem, be it MariaDB Server, MariaDB Connectors, or MariaDB MaxScale. The complete list of our suggested project ideas is in MariaDB […]

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MariaDB AWS Key Management Service (KMS) Encryption Plugin

MariaDB 10.1 introduced Data at Rest Encryption. By default we provide a file_key_management plugin. This is a basic plugin storing keys in a file that can be itself encrypted. This file can come from a usb stick removed once keys have been brought into memory. But this remains a basic solution not suitable for security [...]

Developing a MySQL Workbench plugin

The MySQL Workbench tool is great for development and administration tasks. Also it's available on Windows, Linux and Mac OS X which, according to information from third party sources, is more than you can say for most of the other equivalent tools. And Workbench is free. Having said that, most of the provided functionalities are intuitive and of daily use for developer and DBA staff alike.

MariaDB meetup in Helsinki on March 17th

If you are in Helsinki on Thursday next week March 17th, join us for the MariaDB meetup at Solinor. MariaDB team members will present the latest on MariaDB 10.1, MaxScale and MariaDB’s future roadmap. On stage Rasmus Johansson VP Engineering, MariaDB Corporation and Johan Wikman & Markus Mäkelä, developers of MaxScale. See the meetup page […]

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Eating our own dog food – Running JIRA on MariaDB

A couple of weeks ago we announced that we were moving from a hosted instance of JIRA to our self hosted instance. The main reason was that we hit 2000 active users in the hosted instance of JIRA and that is the upper limit that it  supports. We obviously wanted to allow more people to […]

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New in MariaDB Connector/C 3.0 – Part I: SSL

New SSL alternatives SSL connections in previous versions of MariaDB Connector/C based on the OpenSSL library. The OpenSSL heartbleed bug, licensing problems and the lack of supporting different transport layers were the main reasons that we decided to offer SSL alternatives. In addition to OpenSSL the following SSL libraries are supported in Connector/C 3.0: GnuTLS […]

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