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.

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• All the lightning talks belowin one continuous video (just over 54 minutes total)
  
• The Graph Engine (Antony Curtis)
  
• …

This is the 170th edition of Log Buffer, the weekly review of database blogs. Welcome. Let’s kick off this week with a double-helping of . . . 

SQL Server

There are lots of good technical posts this week. The SSIS Junkie has some observations and a straw poll on sort transform arbitration. He writes, “This post was prompted by a thread on the MSDN SSIS forum today where the poster was asking how he could replicate the behaviour of SSIS’s Sort transform using T-SQL, specifically he wanted to know how the Sort transform chooses what data to pass through when the ‘Remove Duplicates’ option is checked.”

Another poll, …

The 169th edition of Log Buffer, the weekly review of database blogs, has been published on Pakistan’s First Oracle Blog by Fahd Mirza.

This is the first Log Buffer published outside Pythian in quite a while, and we’d love to have more. Log Buffer has a regular readership, and so makes a great way to present yourself and your blog to the DBA community at large. To get started, just send an email to the Log Buffer coordinator.

And now, here is Log Buffer #169.

For the past two months, I have been running tests on TokuDB in my free time. TokuDB is a storage engine put out by Tokutek. TokuDB uses fractal tree indexes instead of B-tree indexes to improve performance, which is dramatically noticeable when dealing with large tables (over 100 million rows).

For those that like the information “above the fold”, here is a table with results from a test comparing InnoDB and TokuDB. All the steps are explained in the post below, if you want more details, but here’s the table:

Debian Linux (the underlying foundation of Ubuntu) manages the startup/shutdown of MySQL quite differently from the ways I am used to. I am a long-time user of both the MySQL binary provided by Red Hat/SuSE (along with Fedora and clones like CentOS and Oracle Enterprise Linux) and the official binary from mysql.com. After the successful restore of a cold backup, I started mysqld using the Debian provided init script. The script said that mysqld failed to start up, but in reality it did start up. Similarly, stopping mysqld fails.

The output below demonstrates the outputs and the behavior seen on a Ubuntu 8.04 LTS Server:

root:~# ps -ef | grep mysqld
root     20165 19926  0 15:12 pts/4    00:00:00 grep mysqld
root:~# /etc/init.d/mysql start
 * Starting MySQL database server mysqld                                            [fail]
root:~# ps -ef | grep …

Last night at the Boston MySQL User Group I presented on how to get a consistent snapshot to build a slave, how to use mk-table-checksum to check for differences between masters and slaves on an ongoing basis, and how to use tools such as mk-table-sync and mysqldump to sync the data if there are any discrepancies.

The slides are online at http://technocation.org/files/doc/slave_sync.pdf.

The video can be watched on youtube at http://www.youtube.com/watch?v=Un0wqYKmbWY or directly in your browser with the embedded player below:

This is the 168th edition of Log Buffer, the weekly review of database blogs. Let’s give the wheel a spin and see who comes first . . . 

MySQL

Brian “Krow” Aker has something to say about Drizzle, InfiniDB, and column-oriented storage: “I have been asked a number of times ‘do you think there is a need for a column oriented database in the open source world?’ The answer has been yes!  . . .  I was very happy to see Calpont do their release of Infinidb last week.”

Vadim of the MySQL Performance Blog said, “As Calpont announced availability of InfiniDB I …

Welcome to the 167th edition of Log Buffer, the weekly review of database blogs.

Since all that OOW news forced Gerry to give them short shrift last week, let’s begin with blogs on . . . 

SQL Server

Jeremiah Peschka gets our week going with his refresher introduction to SQL Server system databases.

Likewise, Pinal Dave reviews the difference between candidate keys and primary key.

…