Here's the (hopefully) complete list of events throughout and following the upcoming Percona Live MySQL Conference & Expo, 2013.
The schedule is quite packed! Make sure to take a deep breath beforehand:
09:30 - 16:30: Tutorials
16:30 - 18:30: Welcome reception in Expo Hall
18:30 - 20:30: MySQL Community Reception by Oracle
09:00 - 11:00: Keynotes
11:00 - 17:40: Sessions
18:00 - 19:00: Birds of a Feather
19:00 - 22:00: Community dinner at Pedro's
09:00 - 10:35: Keynotes
11:10 - 17:20: sessions
09:00 - 10:35: Keynotes
11:00 - 16:00: Sessions
16:00 - 16:45: Wrap-up
Following the conference, you can find:
I'm looking for assistance in manning a DotOrg Pavilion on the upcoming Percona Live conference in Santa Clara.
As you may or may not know, free and open source projects are eligible to ask for a free booth on the Expo hall. This is a good chance to promote one's project.
Of course, someone must stand behind the counter and answer [technical] questions.
I should like to have a booth for common_schema & openark-kit, but am limited in resources -- namely the number of bodies I can occupy simultaneously, just one at this time. Along with some duties I have throughout the conference I do not expect to be able to be present for long periods behind the counter.
Are you familiar with common_schema/openark-kit? Would you like to lend a hand and contribute some hours at the conference?
For a full time attendee I can lend a hand and provide with a free conference pass + my gratitude.
Please comment below if you are willing to commit yourself to this task -- thank you!
I had the pleasure of speaking on two excellent podcasts:
No need for me to introduce this podcast. I just have to say it was only when I interviewed that I realized the amount of work taken for producing one single cast. Kudos to Sheeri & Gerry and Rich Goyette the sound producer and thank you for your kind hospitality!
This is an Israeli, Hebrew speaking podcast, and is undoubtedly the queen of Software Development podcasts here. Run by two enthusiast, veteran, open source keen developers, this is a must hear podcast if your Hebrew isn't rusty Thanks Ori & Ran for having me again!
I was honored to be interviewed for the 3rd time there, again speaking about MySQL and its ecosystem. In this recent podcast, I speak about the new 5.6 release, highlighting some features; about MariaDB; the Galera cluster technology; LGPL connectors; Percona Live 2013.
Find the cast on the reversim website: 171 MySQL 5.6
My next speaking event will be at the conference itself; more on that later.
rdebug will be released as part of common_schema, free and open sourced.
In this sneak preview I present:
rdebug is a server-side mechanism, itself written in MySQL stored routines. It manipulates your routines by injecting debug code (easily removed afterwards).
To debug a routine you will need two connections: one is the debugging connection, and the other is the worker connection. The debugger connection attaches itself to the worker connection, where your routines execute.
rdebug is controlled by an API of stored routines. This means any GUI tool may choose to use rdebug as its routine debugging mechanism. Your are not bound to a specific tool, a specific OS or framework. You may choose to invoke the API via command line, if you like; it's all in your server.
At this moment, it will refuse to install MariaDB 10.0 (alpha):
bash$ make_sandbox /tmp/mariadb-10.0.1-linux-x86_64.tar.gz unpacking /tmp/mariadb-10.0.1-linux-x86_64.tar.gz unsupported version 10.0
This is perfectly legitimate, and I have no quarrel with this fact. However, I did want to setup MariaDB 10.0 as a sandbox.
As it turns out mysqlsandbox relies on MySQL package naming conventions to detect the version: the fact that a tgz file distribution is named mariadb-10.0.1-linux-x86_64.tar.gz and extracts onto mariadb-10.0.1-linux-x86_64, tells mysqlsandbox that this is version 10.0.1. Easy enough to cheat, then: pick a version that mysqlsandbox will work with, and which is compatible sandbox-wise with your own, and do the renames. For that matter, I picked 5.5, and, actually, made it 5.5.100: Continue Reading »
Oracle? Oracle! We're extremely happy to have Oracle as presenter in Percona Live 2013!
You can expect three sessions by Oracle engineers:
• MySQL 5.6: Performance Benchmarks, Tuning, and Best Practices - Dmitri Kravtchuk
• MySQL 5.6: What’s New in InnoDB - Sunny Bains
• MySQL 5.6: Redefining Replication - Luís Soares
And Tomas Ulin will present the obligatory "State of the Dolphin" keynote.
Skip my part in this conference for the moment; I'm very happy this is happening. For the community this is an obvious gain. I also wish to congratulate both Oracle and Percona for pulling this off; both parties deserve warm words here.
See announcement here.
Birds of a Feather schedule is published. This happens on Tuesday, second day of the conference and first day of conference sessions, 6:00pm to 7:00pm. The BoF sessions are reviewed by the conference committee.
Lightning talks are very short, rapid talks. We have 9 talks, totaling at about one hour. Giuseppe Maxia is orchestrating the talks. The talks are presented during the Community evening, Wednesday, 5:30pm to 8:30pm, where community awards are also presented. Giuseppe will naturally elaborate on that.
For me excitement is quickly building up!
Had a case recently where I had to merge data from two identically structured tables containing nearly identical data.
"Nearly identical" meaning most table data is identical in both; sometimes a row is missing from one of the tables; sometimes same row (according to PK) appears in both, but some columns are NULL is one tables (while others can be NULL in the second).
Otherwise no contradicting data: it was not possible for some data to be "3" in one table and "4" in the other.
pt-table-sync comes to mind: one can do a bidirectional syncing of two tables, and actually stating how to resolve ambiguities (like "greater value wins"). Very powerful! An example would be:
pt-table-sync --bidirectional --conflict-column=a --conflict-comparison=greatest --tables ...
However I didn't actually have any problem with the tables themselves. The two tables were just fine as they were; missing or NULL data does not indicate an error on their part. I wanted to get their merge. pt-table-sync is still up for the job: we can duplicate them, merge on the copy... But I prefer a query over an external script when possible.
This MySQL-specific syntax is actually quite powerful. It basically says "if the insert fails due to unique constraint, you get a chance to update the row causing the failure". But it also allows for smart setting of the column via the VALUES() clause. Let's present some sample data and then see the solution. Continue Reading »
This is a sneak peek video introduction/preview of an in-development free and open source server side debugger & debugging API for MySQL stored routines.
MySQL does not provide server side debugging capabilities for stored routines. Some tools exist, including MySQL's own, that assist in stored routine debugging. These are all GUI based and, to the best of my knowledge, MS Windows based. There is one solution in alpha stage that is developed for Java/eclipse; I did not look at the code. See discussion here and here.
An ideal solution would be to have debugging API in the server itself - independently of your client, programming language or operating system. To the best of my knowledge, nothing like that is being developed.
I'm now presenting a rdebug: a stored routines server-side debugger, Pure-SQL, based on stored routines. rdebug is developed as part of common_schema, and actually relies on some of its power.
Like some other tools, it uses code injection and manipulation: it injects debugging info into your stored routine. You need to "compile" your routine with debugging info.
Unlike some other tools, it actually runs your stored routines. It does not mimic or simulate them on client side. It does not break them into smaller routines, attempting to assemble the original behavior from lego bricks.
The quick technical overview is that you use two processes (MySQL threads): the worker process running the routine (your natural call my_routine()), and the debugger process. The debugger process attaches itself to the worker process; it controls the worker by commands like "step over"; it gets data from the worker: what's the current stack trace? What variables are now available and what are their values?; it manipulates the worker's data: it can utilize breakpoints to modify worker's local & session variables. Continue Reading »
Apparently my first attempt at rhyming proved to be unsuccessful: only two courageous men attempted solving the riddle. As I'm pretty sure a free pass would appeal to many, and I do have a few readers for my blog, I must conclude my riddle was just too hard. Obscure, perhaps.
Hope I didn't scare anyone off. Without further ado I present some hints. This post will update with more hints as the day progresses -- please refresh to see changes. I start with two hints.
But first, recap of the riddle:
Who will open your present,
Make you play pleasant,
Tidy your mess,
Do the same for all else?
It has something to do with the MySQL world. Continue Reading »