innodb_flush_logs_on_trx_commit and Galera Cluster

We deploy Galera Cluster (in MariaDB) for some clients, and innodb_flush_logs_on_trx_commit is one of the settings we’ve been playing with. The options according to the manual: =0 don’t write or flush at commit, write and flush once per second =1 write and flush at trx commit =2 write log, but only flush once per second The flush […]

Galera pre-deployment check

One of the first things we do when preparing a client’s infrastructure for Galera deployment is see whether their schema is suitable. Avoiding quirks and edge cases, we can say that Galera simply requires all tables to be InnoDB and also have a PRIMARY KEY (obviously having a PK in InnoDB is important anyway, for […]

MySQL Cluster on Raspberry Pi

Earlier this week, Andrew Morgan wrote a piece on running MySQL Cluster on Raspberry Pi. Since the term “Cluster” is hideously overloaded, I’ll note that we’re talking about the NDB cluster storage engine here, a very specific architecture originally acquired by MySQL AB from Ericsson (telco). Raspberry Pi is a new single-board computer based on […]

LexisNexis open sources code for Hadoop alternative

http://gigaom.com/cloud/lexisnexis-open-sources-code-for-hadoop-alternative/ HPCC Systems has released the open source code of its data-processing software that it’s positioning as a better version of Hadoop. The code is available on Github, and it marks the commencement of HPCC Systems’ quest to build a community of developers underneath Hadoop’s expansive shadow.

New Open Query training days in Australia

The favourite Open Query course modules as well as reworked and brand new ones, with November/December 2009 dates for Brisbane, Sydney, Canberra and Melbourne listed below. You can register for days/modules individually, to suit your time, budget and current needs. Your trainers are Sean, Ray and Arjen (see OQ people). For the Canberra and Melbourne […]