When I read on the internetz that Alex Davies was about the publish a Packt book on MySQL HA I pinged my contacts at Packt and suggested that I'd review the book .
I've ran into Alex at some UKUUG conferences before and he's got a solid background on MySQL Cluster and other HA alternatives so I was looking forward to reading the book.
Alex starts of with a couple of indepth chapters on MySQL Cluster, he does mention that it's not a fit for all problems, but I'd hoped he did it a bit more prominently ... an upfront chapter outlining the different approaches and when which approach is a match could have been better. The avid reader now might be 80 pages into MySQL cluster before he realizes it's not going to be a match for his problem.
I really loved …[Read more]
So about 4 monts ago there was the crazy idea to start a new FOSS event in Belgium targeted at sysadmins.
What started out as an event for local people to meet local people with some local speakers actually ended up being a small local event with some top international speakers on onfiguration mananagement and system administration mixed with a bunch of good local ones !
I had the honour to open the conference with an extremely short version of the Devops talk I gave earlier last year.. extremely short as I knew that over the course of the weekend the topic would reoccur a lot.
We had the first european talk on Chef, by Joshua Timberman, and we had Puppet talks amongst by Dan Bode from Puppetlabs and CFengine talks , devops was a frequently dropped word,
We had a book raffle where …[Read more]
Last week I was in Manchester for the 2010 UKUUG Spring Conference, right .. make that 2 weeks ago , :)
The UKUUG usually hosts the more interesting conferences around ... , it's not just the schedule that attrackts me , yes there's the strong focus towards Larger Scale Unix (and mostly Linux) deployments and how to manage them, but there's also the opportunity to chat in real life with the Devops from across the chunnel.
As I …[Read more]
Last month cloud computing and systems management expert John Willis published his best of Cloud Computing for 2009 list he calls the Cloudies. I am not an expert on the latest developments in cloud computing so it was nice to get a list of the best (in his expert opinion) cloud computing tools. I was especially interested in the latest open source software and I did a little research on each of these projects to see if they had active development mailing lists, regular releases and a real community behind …[Read more]
A couple of days ago, I was helping some USG admins who were facing an interesting issue. Interesting for me, but I don’t think they’d share my views on this, as their servers were melting down under the database load.
But first let me explain the issue.
The thing is that when a client checks in to get its configuration, the puppetmaster compiles its configuration to a digestible format and returns it. This operation is the process of transforming the AST built by parsing the …[Read more]
Since a long time people (including me) complained that storeconfigs was a real resource hog. Unfortunately for us, this option is so cool and useful.
Storeconfigs is a puppetmasterd option that stores the nodes actual configuration to a database. It does this by comparing the result of the last compilation against what is actually in the database, resource per resource, then parameter per parameter, and so on.
The actual implementation is based on Rails’ Active Record, which is a great way to abstract the gory details of the database, and prototype code easily …[Read more]