Using augeas and puppet to modify grub.conf

In my environment, we rely heavily upon Puppet to do large-scale automation and updating of our various systems. One of the tasks that we do on an infrequent basis is to modify grub.conf across many (or even all) systems to apply the same types of changes. In Puppet, there are several ways you can do […]

Running Hadoop data nodes from USB thumb drives?

I received an interesting question today from a reader regarding the use of USB thumb drives for the OS drives in Hadoop datanodes. Have you ever put the OS for a Hadoop node on a USB thumb drive? (or considered it) I have a smaller 8 node cluster and that would free up one of […]