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Welcome to Datavail’s Blog, where you can read the latest insights, tips and opinions of our experts on all things data and technology.

Author: Patrick Galbraith
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RPM “multiple packages” oddity, fixed

I deal with all shipes and sizes, and distributions, of Linux. Each Linux distribution has quirks. Particularly with package management. There are some people who are religious about RPM (Redhat, Centos, Fedora, Suse, etc.) or APT (Debian, Ubuntu, etc). I see both good and bad points of each. In my daily tasks, I just want […]

Patrick Galbraith | October 31, 2011

About MySQL storage engines and replication

I know most articles are more about DBA issues, however, being a MySQL DBA means that you have several hats that you can where– data architect, application developer, MySQL source developer, and often good old fashioned DBA. I recently had an interesting problem with a particular project I was working on that required the MySQL […]

Patrick Galbraith | September 2, 2011

Life made easier: Facebook’s Online Schema Change for MySQL

So often, you have a task where you need to perform an alteration of a huge table while not wanting to affect the operation of your website. With an alter table, MySQL will internally lock the table in question, create a temporary table with the new table definition, copy the date, then drop the current […]

Patrick Galbraith | July 27, 2011

Narada 0.202 (plus AMI!) released

I’m pleased to announce the release of the Narada Search Engine Application, version 0.202, as well as a ready-to-use AMI, ami-140df07d. The source release can be found at Launchpad – lp:narada and and a packaged version at http://www.patg.net What is Narada? Narada is a search engine application. It does have a web application component, but […]

Patrick Galbraith | April 7, 2011

Using SQL to create SQL (and other usefulness)

Today, I had a task of modifying a slave to exclude (or if you want to say specifically include) tables. The situation is that this slave need only contain tables used for reporting. The added benefit being that with fewer tables to replicate there will be less replication traffic, less disk I/O and less disk space used hence better performance for queries that digest statistical data.

Patrick Galbraith | February 11, 2011

Percona Server Goodies

I’m posting to describe some of the features and improvements that I have been utilizing with the Percona Server with XtraDB MySQL distribution, as well as Percona’s XtraBackup. If you don’t already know, Percona Server XtraDB is a backwards-compatible MySQL distribution with XtraDB, an enhanced version of InnoDB. It runs faster, has better performance and is easier to monitor and tune.

Patrick Galbraith | December 31, 2010

Debugging Stored procedures

Over the past several weeks, we’ve been working on debugging a stored procedure bug for a client. Coming from a software development background, I looked at the procedure like any piece of code — how can I debug the program and be able to use some means of knowing the values within the program while it’s running?

Patrick Galbraith | October 15, 2010

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