Occasionally you may have a situation where a virtual machine won’t boot correctly, or you cannot get into it. It’s not very well known, but OpenStack provides a mechanism to rescue virtual instances in this state and repair them. Firstly boot the instance into rescue mode. You’ll need the instance ID in order to do this, which you can find in Horizon or via the CLI. nova rescue $instance_id You’ll see in Horizon and the CLI tools that the instance is now showing as having status Rescue.

This article was originally published by Tech Week Europe, the original article can be found here. As of the end of 2016, many of these concepts have already penetrated deeply into the enterprise space - object storage and distributed storage architectures are rapidly becoming the standard approaches. The coming revolution of storage class memory will fundamentally alter the storage space again, and potentially the computing architectures which we’ve essentially followed for the last 50 years.

This article was first published on Information Age, the original article is here. As of 2016, it’s yet to be seen if this if any of this is accurate, although a number of commentators are now talking about smaller more localised cloud provision perhaps ending up as the dominant model, we’ve seen the concepts of Fog and Edge computing becoming more tangible, and we’re certainly seeing specialised clouds appearing. It’s no secret that the IT industry is in the process of a paradigm shift: the ongoing decline in tier-one hardware sales and the rise of on-demand computing.