Some people want to use a backup to prepare a new Percona XtraDB Cluster node. They want this to avoid State Snapshot Transfer that could slow down the donor (depending of the SST method you are using, the donor can be blocked. I will cover this in a future blog post). As backup are generally performed during non-peak time, the effect should be reduced, and this avoid the need of performing 2 backups: the usual backup and the SST).
So to be able to use a backup for this purpose, we have 3 prerequisites:
I'm doing a lot of stored routine programming lately, working on common_schema. I'm in particular touching at the extremes of abilities. Some things just can't be done from within a stored routine. Here's a list of can't be done:
Innodb uses row level locks right ? So if you see locked tables reported in SHOW ENGINE INNODB STATUS you might be confused and rightfully so as Innodb table locking is a bit more complicated than traditional MyISAM table locks.
Let me start with some examples. First lets run SELECT Query:
Today, Percona announces that Live Virtual Training is now an option for busy professionals.
If you’re looking for best prices for Percona Live NY 2012, taking place Oct 1,2 in New York do not delay and book now. Super Saver discounts ends tomorrow, which can save you hundreds of dollars off conference prices list prices. These are the best prices you can get by booking early – There will be no other discounts available that will get you to this price.
I will be Southern California next week at two public events in Los Angeles and San Diego. MySQL 5.6 Update on August 1st and MySQL: New Features, Programming Mistakes and Optimization on August 2nd. Both are in Oracle offices, start at 7PM, and there will be Pizza! Please be totally cool dudes and dudettes and RSVP so we can order enough pizza to keep things totally tubular! And there will be MySQL SWAG given away!
The MySQL Market Continues to Grow
I am continuing to see the continued growth of MySQL not only in the SMB market but in Fortune 500 accounts. I recently asked a large customer what their distribution of databases is and they responded with:
2000 Oracle databases
4000 SQL Server databases
6000 MySQL databases
MySQL the Internet Database Platform
Since taking over MySQL, Oracle has added
I presented a webinar today about SQL Injection, to try to clear up some of the misconceptions that many other blogs and articles have about this security risk. You can register for the webinar even now that I’ve presented it, and you’ll be emailed a link to the recording, which will be available soon.
During my webinar, a number of attendees asked some good questions, and I wasn’t able to answer them all before the hour was up. Here are the questions and my answers.
Today’s Dilbert asks how long to train a technical writer to become a Database Analyst. The answer? 45 minutes!
During the design period of a new cluster, it is always advised to have at least 3 nodes (this is the case with PXC but it’s also the same with PRM). But why and what are the risks ?