OpenStack’s compute service, nova, manages all of the virtual machines within a OpenStack cloud. When you ask nova to build an instance, or a group of instances, nova’s scheduler system determines which hypervisors should run each instance. The scheduler uses filters to figure out where each instance belongs. However, there are situations where the scheduler might put more than one of your instances on the same host, especially when resources are constrained.
It’s been three long years since the last MySQLTuner release but you’ll now find version 1.3.0 available on GitHub. You can get it from the git repository or via these extremely simple methods: wget -O mysqltuner.pl mysqltuner.pl wget –trust-server-names mysqltuner.pl There are a bunch of new features and fixes that you can find in the list of commits from today (2014-02-21). Some of the bigger adjustments include: Basic support for MariaDB 10.
Thursday has felt like the busiest, most jam-packed day of the week. The morning started off with three keynotes from HP, Intel, and Red Hat’s CTO, Brian Stevens. HP’s message centered around converged cloud and that customers don’t need an all or nothing solution. They can pull the best pieces from every type of hosting to do what’s best for their business. The presentation from Intel was extremely heavy on the marketing side and didn’t have much to do with Red Hat.
If you push play, the video should scoot out to about the 14m40s mark where MySQLTuner appears on one of the slides. Thanks to Trent Hornibrook for letting me know!
The pv command is one that I really enjoy using but it’s also one that I often forget about. You can’t get a much more concise definition of what pv does than this one: pv allows a user to see the progress of data through a pipeline, by giving information such as time elapsed, percentage completed (with progress bar), current throughput rate, total data transferred, and ETA. The usage certainly isn’t complicated: