Tag Archives: dedupe

OpenStack with Shared Storage Series: No-dupe > dedupe

I have gotten lots of questions about openstack lately, and interestingly, most questions revolve around the value of using shared storage.  Instead of doing a boring checkbox comparison between shared storage and software on top of local DAS (I avoid using the term ‘software defined storage’ because shared storage could very well be classified as ‘software defined’), I decided to start a series on “OpenStack with Shared Storage”.  First up on the list is my favorite topic: NO-dupe is always better than dedupe.   Read on if you want to find out why…

One of the top use cases for OpenStack platform is private cloud for dev/test environments.  In such environments, VM instance cloning happens very frequently.  For example, the base software build is captured as an image in glance.  Each developer in the team can get his/her own instance based on the image – this can easily be done through Horizon by provisioning an instance based on an image.  To ensure code modification is not lost due to instance reboot, it is best to boot the instance from a volume through cinder.  In order to do that, one can simply select “Boot from Image (creates a new volume)” option in the instance launch wizard:
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