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This release contains minor bug fixes and new features. Besides the little bug fixes, there's a fun new feature in mk-heartbeat: it can auto-discover slaves recursively, and show the replication delay on all of them, to wit:

baron@keywest ~ $ mk-heartbeat --check --host master -D rkdb --recurse 10
master 0
slave1 1
slave2 1
slave3 4

(Not actual results. Your mileage may vary. Closed course, professional driver. Do not attempt).

Nothing else in this release is very exciting. I just wanted to get the bug fixes out there.

Jason Hull of OpenSource Connections, a company in my town, posted an article on what Sun's acquisition of MySQL means for the US government. I thought Planet MySQL readers might appreciate a different angle on the issue than many of the Planet MySQL posts, which are often focused on business or community more than government. (I'm just passing the link along, not agreeing or disagreeing).

I'll be attending the 2008 MySQL Conference and Expo again this year, and I'm looking forward to hearing some great sessions, meeting new and old friends, and giving sessions myself. As a proposal reviewer, I looked at and voted on 250+ proposals for sessions and tutorials for this conference. There are going to be some great sessions and tutorials.

This release contains bug fixes and new features. It also contains a new tool: my implementation of Paul Tuckfield's relay log pipelining idea. I have had quite a few responses to that blog post, and requests for the code. So I'm releasing it as part of Maatkit.

I dashed off a hasty post about speeding up replication slaves, and gave no references or explanation. That's what happens when I write quickly! This post explains what the heck I was talking about.

Paul Tuckfield of YouTube has spoken about how he sped up his slaves by pre-fetching the slave's relay logs. I wrote an implementation of this, tried it on my workload, and it didn't speed them up. (I didn't expect it to; I don't have the right workload). I had a few email exchanges with Paul and some other experts on the topic and we agreed my workload isn't going to benefit from the pre-fetching.

In the meantime, I've got a pretty sophisticated implementation of Paul's idea just sitting around, unused. I haven't released it for the same reasons Paul didn't release his: I'm afraid it might do more harm than good.

However, if you'd like the code, send me an email at [baron at this domain] and I'll share the code with you. In return, I would like you to tell me about your hardware and your workload, and to do at least some rudimentary benchmarks to show whether it works or not on your workload. If I find that this is beneficial for …

Whew! I just finished a marathon of revisions. It's been a while since I posted about our progress, so here's an update for the curious readers.

… I’m almost insulted! Look at this!

entity relationship diagram, ERD, Google, humor

This release contains bug fixes and new features. Click through to the full article for the details. I'll also write more about the changes in a separate article.

My posts lately have been mostly progress reports and release notices. That's because we're in the home stretch on the book, and I don't have much spare time. However, a lot has also been changing with Maatkit, and I wanted to take some time to write about it properly.