The latest from the MySQL community

From the desk of your new Bazaar plugin for Jenkins maintainer, I give you Version 1.18.

This release has two good bug fixes:

• UI fix for checkout option (JENKINS-12261)
• Auto-recover from corrupt BZR branches (e.g. bzr branch/checkout killed at inopportune moment) by cleaning the workspace and trying again (this is now default behaviour, best used with the Jenkins SCM retry count feature being > 1)

We’ve been running the same code as this release at Percona for about 2 months now (the second bugfix was one I wanted to test first before submitting upstream). This is the big fix that fixed all our problems with using bazaar with Jenkins in a large deployment.

The other news? I’m now maintainer, and this is my first release.

The page on the Jenkins wiki is here:

• …

For Drizzle and for all of the projects we work on at Percona we use the Bazaar revision control system (largely because it’s what we were using at MySQL and it’s what MySQL still uses). We also use Jenkins.

We have a lot of jobs in our Jenkins. A lot. We build upstream MySQL 5.1, 5.5 and 5.6, Percona Server 5.1, Percona Server 5.5, XtraBackup 1.6, 2.0 and 2.1. For each of these we also have the normal trunk builds as well as parameterised ones that allow a developer to test out a tree before they ask for it to be merged. We also have each of these products across seven operating systems and for each of those both x86 32bit and 64bit. If we weren’t already in the hundreds of jobs, we certainly are once you multiply out between release and debug and XtraBackup being across so many MySQL and Percona …

Since I have been discussing scripting lately I thought I would continue with another topic I touched on briefly - backups.

I have written and modified the following script over the last few years. I have used it (and continue to use it) with multiple clients. It uses Percona's Xtrabackup to take the backup (although it can be easily modified to use mysqldump instead).

First the script

-----------------------------------------------------------------------------------------------------------------

#!/bin/bash
SAVEIFS=$IFS
IFS=$""
day_of_week=`date +%a`
backup_dir=/mysql-backup/
logfile=/root/backup_log.txt
report=/tmp/report.txt
servername=slave1
email=bmurphy@paragon-cs.com
password=`cat /root/.ssh/.backup_password`

# run backup
echo ' ' > $report
echo 'The backup is now beginning:' >> $report
echo ' ' …

The best (and truly the only) MySQL multi-master, multi-site solution on the market gets even better! Continuent is happy to announce immediate availability of Continuent Tungsten 1.5.New Continuent Tungsten 1.5 allows you to build multi-site, disaster recovery (DR) and multi-master solutions with ease:

Multi-Master Operations - Tungsten can support your multi-master operations today by linking

You could say: what could be the reason for having really big number of tables? Just design the application properly! It’s not always that easy. And this post isn’t really about arguing whether having many tables is good or not, it’s about what happens in terms of memory usage if you already reached that point.

Btw what do I mean by *many*? From my experience it’s tens of thousends or even millions rather than hundreds.

The inspiration for me to write this post was strong desire to try out the latest declared improvements in that area announced to be done in MySQL 5.6. _1

What I did was a very simple test where I loaded sql dump of databases and tables definitions only into different versions of MySQL. During the load time I was monitoring memory usage of mysqld process (RSS …

We are excited to have Gerry Narvaja start today at Tokutek! Gerry has spent more than 25 years in the software industry, most of them working with databases for different kinds of applications, from embedded to large-scale web products. Gerry worked first at MySQL, and then Sun Microsystems supporting the Sales teams. In 2008 he transitioned into being a Senior MySQL DBA. Gerry graduated as an Electronic Engineer from I.T.B.A (Instituto Tecnológico de Buenos Aires) and has an M.B.A. from Universidad del Salvador in collaboration with S.U.N.Y.A (State University of NY at Albany).

Gerry enjoys helping users to solve complex database production issues. For almost a year he has been co-hosting the popular MySQL Community podcast, OurSQL, which was given the …

In April, I got to give a talk at Percona Live, about why The Right Read Optimization is Actually Write Optimization. It was my first industry talk, so I was delighted when someone in the audience said “I feel like I just earned a college credit.”

Box offered to host everyone’s slides from the conference here (mine is here). A big thanks from me to Sheeri Cabral, for recording my talk and posting it online!

The focus of the talk …

This is the second and final part of my notes from the MySQL conference. In this part I'll focus on the technical substance of talks I saw, and didn't see.

More than ever before I was a contributor rather than attendee at this conference. Looking back, this resulted in seeing less talks than I would have wanted to, since I was speaking or preparing to speak myself. Sometimes it was worse than speaking, for instance I spent half a day picking up pewter goblets from an egnravings shop... (congratulations to all the winners again :-) Luckily, I can make up for some of that by going back and browse their slides. This is especially important whenever 2 good talks are scheduled in the same slot, or in the same slot when I was to speak. So I have categorized topics here along various axes, but also along the "things I did see" versus "things I missed" axis.

My own talks

…

I have finally recovered from my trip to Santa Clara enough that I can scribble down some notes from this year's MySQL Conference. Writing a travel report is part of the deal where my employer covers the travel expense, so even if many people have written about the conference, I need to do it too. And judging from the many posts for instance from Pythian's direction, Nokia is perhaps not the only company with such a policy?

Baron's keynote

There has usually always been something that can be called a "soft keynote". Pirate Party founder Rick Falckvinge speaking at a database conference is a memorable example (I still keep in touch with him, having met him at the Hyatt Santa Clara). This year there was one less day, and therefore less keynotes. The soft keynote was therefore taken care of by Baron using some time out of Peter's opening keynote. Baron's talk was an ode to the conference itself, underscoring the meaning of the …

Topics for this podcast:

*OpenStack, Amazon, Eucalyptus and Citrix engage in open cloud warfare
*Microsoft spins off new company for openness
*Updates on automation players Puppet Labs and Opscode with Chef
*Percona turns attention to MySQL high availability
*Open APIs as the fifth pillar of modern IT openness

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