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Displaying posts with tag: Tech (reset)

Artem’s Top 10 Tech Predictions And Ideas For 2009 And Beyond
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Everyone and their mother are throwing out their predictions for 2009 nowadays, it’s a new fad. It’s like you’re not cool anymore if you don’t have twitter, a Mac, and a set of random predictions for the next 12 joyous months.

So I decided to throw in a few ideas of my own to be part of the cool crowd again (how much cooler can I be already, you might think, and I wouldn’t blame you).

 

Disclaimer (read it, tough guy)

What this post is:

  • about the future of technology and the Internet, 2009 and beyond.
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Hibernate Query Cache: A Dirty Little Secret
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You Mean, Memory Is Not Infinite?We're working hard getting MySQL Enterprise Monitor 2.0, featuring Query Analyzer, ready for release. As part of that, we started really ramping up the number of MySQL servers reporting in query data to see how we could scale. Not surprising (to me, anyway), the first efforts did not go so well. My old friend OutOfMemoryError reared its ugly head once again.
Query Cache -- It's More Than Just Results! We're big (ab)users of hibernate query caching, and more importantly to us the …

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MySQL and the Missing Rows
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I was doing some multi-threaded, multi-transactional testing for the backend of the MySQL Enterprise Monitor. I came across a weird failure, where it appeared I was able to successfully insert a row, and then (in the same transaction), a select from the same table did not return any rows.

Consider the following transactions:


mysql> create table t1 (id integer primary key auto_increment, name varchar(32) unique) engine=innodb;

a> begin;

b> begin;
b> select * from t1;

a> insert into t1 values(null, 'oldag');

b> insert into t1 values(null, 'oldag) …













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Mysql Error
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I was running an import script today taken from a mysqldump from another user, when I saw an error that looked like this:

ERROR 1005 (HY000) at line 123: Cant create table
 (errno: 150)

This is caused by a mysqldump or export process exporting tables in alphabetical order and not in the order in which they rely on one another. My tables had foreign keys which fail on import if the other table doesn't exist when you create the table with the key. In this case I was only importing six or eight tables so I simply opened the script in a text editor and re-ordered the import blocks. On a bigger scale a more …

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Hibernate: Cache Queries the Natural Id Way
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I work on the MySQL Enterprise Tools team, formerly of MySQL and now with Sun Microsystems. The 2.0 version of the Enterprise Monitor is well under way. As part of this, the Java server backend has been refactored to utilize Spring and Hibernate. Honestly, I didn't know either one of those technologies before starting this project. Oh, what a fun road it …

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Certified MySQL 5.1 Cluster Administrator
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Yesterday I passed the CMCDEV exam.

I only used the study guide (previous entry) and the official manual to prepare for the exam.

The study guide is a good preparation for the exam.(Thanks to Roland Bouman and all other people involved with the book. The only minor issue with the book is that it didn't feel finished. Images which should've been printed in high quality and some phrases about a CD which is absent (All listed/fixed in the …



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FOSDEM
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MySQL 5.1 Cluster Certification Study Guide
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Today I received the "MySQL 5.1 Cluster Certification Study Guide".

I will compare this book to the "MySQL 5.0 Certification Study Guide" from MySQL Press. This is the book I used to study for the MCDEV (Certified Developer) and MCDBA (Certified DBA) exams.

The MySQL study guide was published by MySQL Press which is a cooperation with a n old-school publisher.

The MySQL cluster study guide  is published by Lulu.com which is an online on-demand publisher.

Lulu.com Cons:
1. The print quality is worse.
2. The paper is less …









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My MySQL wishlist
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This is my personal whishlist for MySQL.

Please let me know if I'm wrong or if there is a workaround for any of these items.

1. Per user and/or per database quota
Would very useful in setups for shared hosting. This would also prevent one database from bringing down the whole server. Separate tablespaces on different mountpoint can ease the pain, but I consider that a nasty hack.

2. External authentication
I've seen numerous scripts which fetch the authentication info from ldap, a file, another database or some other authentication store. This should be integrated into mysql. The mysql grant tables should be pluggable so it is …







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Good luck, MySQL!
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BusinessWeek reports MySQL continuing with their IPO preparations. As a long-time user (about ten years now), and almost as long-time customer (in many companies, obviously currently and most significantly Sulake and Habbo), I wish you guys the best of luck on that road. Don't lose your sight of the ballgame while doing that -- we need you to continue to do better with the product itself while the …

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10 Newer Entries Showing entries 31 to 40 of 55 10 Older Entries

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