Showing entries 31 to 40 of 219
« 10 Newer Entries | 10 Older Entries »
Displaying posts with tag: OSS (reset)
Building MySQL Server with CMake on Linux/Unix

CMake is a cross-platform, open-source build system, maintained by Kitware, Inc.

From the home page:

CMake is a family of tools designed to build, test and package software. CMake is used to control the software compilation process using simple platform and compiler independent configuration files. CMake generates native makefiles and workspaces that can be used in the compiler environment of your choice.

It has been used for building the MySQL Server on Windows since MySQL 5.0 – the initial CMake build support was added in August 2006.

For …

[Read more]
More MySQL releases

Shortly after I posted my last summary of MySQL releases, our son Mats was born and I went on a 2.5-week vacation. Our developers did not rest in the meanwhile and I'd like to give you a quick update of what's new since then:

MySQL Connector/Net 6.3.0

  • Visual Studio 2010 RC support
  • Nested transaction scope support

MySQL Workbench 5.2.16 Beta 6

  • Fixed 67 bugs
  • Saving your profile/connection passwords in OSX keychain, gnome-keyring or in an encrypted password-vault-file.
  • New rapid development features for generating complete SQL …
[Read more]
DATE type under the hood in Drizzle/MySQL

Learned something new from my own bug in BlitzDB today. The problem was that writing a DATE column index would always return a duplicate key error (regardless of what I feed it). There are two suspicious candidates that can cause this.

  • Comparison Function has a defect.
  • Key Generator has a defect.

The latter suspect was going to be tricky if it was true since BlitzDB currently uses Drizzle’s native “field packer” (except for VARCHAR) inherited from MySQL. This would mean that Drizzle’s field system has a bug in it which was somewhat difficult to believe. Furthermore, you should always blame yourself before you start suspecting other people’s code. So, I decided to look into the comparison function which was completely written by me. Turned out that’s where the bug was.

Comparison Function

Allow me to quickly clarify what I mean by “comparison function” in this context. …

[Read more]
Speaking at the MySQL Conference 2010

I’m a little behind in announcing this but I’m going to be speaking at O’Reilly’s MySQL Conference this year. My presentation is a three hour tutorial titled, Drizzle Storage Engine Development. Practical Example with BlitzDB. Three hours is a long time but I assure you that there will be a break.

This session isn’t solely about going through Drizzle’s Storage Engine API. Various performance topics like B+Tree structure, memory handling and concurrency control will be covered. I will also go through BlitzDB’s design concept and it’s internal stuff. So, needless to say I’ll talk a lot about Tokyo Cabinet and it’s internals as well.

Hopefully those that come along will walk out of the tutorial standing far ahead of the start line. It will help you get started on reading the implementation of other storage engines in the …

[Read more]
Summary of recent MySQL releases

Even though things have been a tad bit turbulent around here in the recent weeks, our engineers did not rest and churned out an impressive number of updates and new releases of the MySQL Server and related products.

Here's a quick summary of what we released this year so far (in chronological order):

[Read more]
Notes on HEAP/MyISAM Index Key Handling on WRITE

Disclaimer: This post is based on HEAP/MyISAM’s sourcecode in Drizzle.

Here are my brief notes on investigating how index keys are generated in HEAP and MyISAM. I lurked through these because I’ve started preparing for decent index support in BlitzDB. I also wrote this to assist my biological memory for later grepping (I have terrible memory for names). I’m only going to cover key generation on write in this post. Otherwise this post is going to be massive.

HEAP Engine

The index structure of HEAP can be either BTREE or HASH (in MySQL doc terms). Like other engines HEAP has a structure for keeping Key definition (parts, type, logic and etc). This structure is called HP_KEYDEF and it contains function pointers for write, delete, and getting the length of the key. These function pointers are assigned to at table creation or when the table is opened. The assigned function depends on the data structure …

[Read more]
Back from SAPO Codebits in Lisbon - a summary

Last week, my colleagues Giuseppe, Kai and myself attended the SAPO Codebits event in Lisbon, Portugal. Codebits is an annual, invite-only hacking event, which went on for three days. The venue they chose this year was the "Cordoaria", a former rope factory located in the Belém district, close to the 25 de Abril Bridge (which is an impressive sight!). I have been told that the Cordoaria is the longest building in Portugal and I have no doubts about that! The building is so long that the crew used bicycles to get from one end to the other. I've taken a number of …

[Read more]
OpenSQLCamp Lightning Talk Videos

OpenSQLCamp was a huge success! Not many folks have blogged about what they learned there….if you missed it, all is not lost. We did take videos of most of the sessions (we only had 3 video cameras, and 4 rooms, and 2 sessions were not recorded).

All the videos have been processed, and I am working on uploading them to YouTube and filling in details for the video descriptions. Not all the videos are up right now….right now all the lightning talks are up.

[Read more]
Aspects and benefits of distributed version control systems (DVCS)

This blog post is a by-product of my preparation work for an upcoming talk titled "Why you should be using a distributed version control system (DVCS) for your project" at SAPO Codebits in Lisbon (December 3-5, 2009). Publishing these thoughts prior to the conference serves two purposes: getting some peer review on my findings and acting as a teaser for the actual talk. So please let me know — did I cover the relevant aspects or did I miss anything? What's your take on DVCS vs. the centralized approach? Why do you prefer one over the other? I'm looking forward to your comments!

Even though there are several distributed alternatives available for some years now (with Bazaar, git and …

[Read more]
Some friendly advice for bootstrapping your OSS project

So you're a small startup company, ready to go live with your product, which you intend to distribute under an Open Source License. Congratulations, you made a wise decision! Your developers have been hacking away frantically, getting the code in good shape for the initial launch. Now it's time to look into what else needs to be built and setup, so you're ready to welcome the first members of your new community and to ensure they are coming back!

Keep the following saying in mind, which especially holds true in the Open Source world: "You never get a second chance to make a first impression!". While the most important thing is of course to have a compelling and useful product, this blog post is an attempt to highlight some other aspects about community building and providing the adequate infrastructure. This insight is based on my own experiences and my …

[Read more]
Showing entries 31 to 40 of 219
« 10 Newer Entries | 10 Older Entries »