Restarting HBase Regionservers using JSON and jq

We run HBase as part of our Hadoop cluster. HBase sits on top of HDFS and is split into two parts: the HBase Master and the HBase Regionservers. The master coordinates which regionservers are in control of each specific region. Automating Recovery Responses We periodically have to do some minor maintenance and upkeep, including restarting […]

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 […]