This week, William “I code more than you will ever be able to” Reade announced that Juju has a new feature called ‘Constraints’.
This is really, really cool and brings juju into a new area of capability for deploying big and little sites.
To be clear, this allows you to abstract things pretty effectively.
Consider this:
juju deploy mysql --constraints mem=10G
juju deploy statusnet --constraints cpu=1
This will result in your mysql service being on an extra large instance since it has 15GB of RAM. Your statusnet instances will be m1.small’s since that will have just 1 ECU.
Even cooler than this is now if you want a mysql slave in a different availability zone:
juju deploy mysql --constraints ec2-zone=a mysql-a
juju deploy mysql --constraints ec2-zone=b mysql-b
juju add-relation mysql-a:master mysql-b:slave
juju add-relation statusnet mysql-a
Now if mysql-a goes down
juju remove-relation statusnet mysql-a
juju add-relation statusnet mysql-b
Much and more is possible, but this really does make juju even more compelling as a tool for simple, easy deployment. Edit: fixed ec2-zone to be the single character, per William’s feedback.
Or, for short, the “2011 O’Reilly MySQL Users Conference & Expo”. Yes thats the short name of the conference that, thus far, has brought me nothing but good info, good times, and insight into one of the most interesting open source communities around.
MySQL has been at the core of a real revolution in the way data driven applications have exploded on the internet. Its so easy to just install it, fire up php’s mysql driver, and boom, you’re saving and retrieving data. The *use* of MySQL has always been incredibly simple.
The politics has, at times, been confusing. Read more »
Handlersocket is what all the cool kids are using these days.. I think. Basically you get a couple of new ports on your mysql server that allow SQL-free reading and writing for doing many thousands of tiny transactions per second without the overhead of parsing SQL.
Thanks to my venerable Ubuntu sponsor, Chuck Short, handlersocket is now available in Ubuntu Natty in the universe repository. apt-get install handlersocket-mysql-5.1 handlersocket-doc, then follow the instructions in /usr/share/doc/handlersocket-doc/docs-en to enable it, and you have yourself a bonified NoSQL solution for your MySQL server.
There are also client libraries for perl (libnet-handlersocket-perl) and C/C++ (libhsclient-dev .. static only as the API is in flux). Other languages are still not packaged, but the protocol is simple, and links to early implementations are listed in the README file, which should be at /usr/share/doc/handlersocket-mysql-5.1/README.
It should be on Debian unstable as well soon…
Update April 3 2011, Handlersocket is now in Debian Unstable as well
Happy hacking!
Drizzle7 Beta Released! now with MySQL migration! « LinuxJedis /dev/null.
Drizzle is a project that is near and dear to my heart.
To sum it up, Drizzle took all that was really good in MySQL, cut out all that was mediocre, and replaced some of it with really good stuff. The end product is, I think, something that is leaner, should be more stable, and definitely more flexible.
So go check out the beta! I guess I should use Andrew’s migration tool and see if I can migrate this blog to drizzle. 
Ding ding ding.. in this corner, wearing black shorts and a giant schema, we have over 11 million records in MySQL with a complex set of rules governing which must be searchable and which must not be. And in that corner, we have the contender, a kid from the back streets, outweighed and out reached by all his opponents, but still victorious in the queue shootout, with just open source, and 12 patch releases.. written in C, its gearman!
Read more »
While attending OSCON 2009 w/ my faithful sidekick fluffy, we constantly kept finding instances of a common theme. The leading companies and projects seem to share one attribute that might shock you.
They all have at least *some* crappy code. At some point, all of them Read more »
This past April I was riding in a late model, 2 door rental car with an interesting trio for sure. On my right sat Patrick Galbraith, maintainer of DBD::mysql and author of the Federated storage engine. Directly in front of me manning the steering wheel (for those of you keen on spatial description, you may have noted at this point that its most likely I was seated in the back, left seat of a car which is designed to be driven on the right side of the road. EOUF [end of useless fact]), David Axmark, co-founder of MySQL. Immediately to his right sat Brian Aker, of (most recently) Drizzle fame.
Read more »
Its always been a dream of mine. I’ve posted about parallel replication on Drizzle’s mailing list before. I think when faced with the problem of a big, highly concurrent master, and scaling out reads simply with lower cost slaves, this is going to be the only way to go.
So today I was really glad to see that somebody is trying out the idea. Seppo Jaakola from “Codership”, who I’ve never heard of before today, posted a link to an article on his blog about his experimentation with parallel replication slaves. The findings are pretty interesting.
Read more »
I’m seated in rooms 203/204 of the Santa Clara convention center, listening to Eric Day’s talk on Gearman, a very cool technology for asynchronous distributed job queueing. Anyway, the point is, I’m here at the conference, wandering around. If you see me, come by and say hi. Here’s what I look like today…
One of my favorite bloggers, Peter over at Percona/MySQL Performance Blog, has thrown down the gauntlet. Basically saying that it would be fairly trivial to write an incremental InnoDB backup tool.
If you see me, and I haven’t run up to you and told you that I am writing/have written an amazing InnoDB incremental backup tool, I give you permission to make fun of me. This sounds like a fun, interesting project that will challenge me and sort of scratches an itch I have, which is, faster MySQL backups.