Luxbet, MariaDB and Melbourne Cup

Yesterday was Melbourne Cup day in Australia – the biggest annual horse race event in the country, and in the state of Victoria it’s even a public holiday. Open Query does work for Luxbet (part of Tabcorp), and Melbourne Cup day is by far their biggest day of the year in terms of traffic. It’s […]

Storage caching options in Linux 3.9 kernel

dm-cache is (albeit still classified “experimental”) is in the just released Linux 3.9 kernel. It deals with generic block devices and uses the device mapper framework. While there have been a few other similar tools flying around, since this one has been adopted into the kernel it looks like this will be the one that […]

Measuring HD latency in ways relevant to MySQL

As I described yesterday, Open Query is doing some tests on SSDs and other devices pretending to be harddisks (SANs, battery-backed RAID controllers, etc). To aid this, I wrote a small tool to test the different kind of I/O operations MySQL would/could do, which is not quite the same as what other general purpose apps would […]

MySQL SSD experiments and a request

Open Query too is exploring utilising SSDs in a MySQL infrastructure, but we wouldn’t be us if we didn’t also try some alternative perspective on it. Right now we’re running some comparative tests against various spinning HD setups in the same box, using the same controller, so we’re looking for differences rather than absolute speed. […]