How important is deduplication for virtual server backup and does it matter whether you perform source deduplication or dedupe at the target?
The answer to this question depends on your idea of what’s important. Deduplication could be thought of as unimportant since it is certainly possible to make a virtual server backup without it. However, if your goal is to conserve space, then deduplication does take on a level of importance. Deduplication can be especially effective in virtual server environments because of the simple fact that a single host server could be running multiple copies of the same operating system. Deduplication can help to minimize the amount of data that must be backed up.
The location at which deduplication is performed does make a difference. Source deduplication consumes resources on the server that is being backed up. In a virtual server environment, it is usually better to perform deduplication on the target, because you don’t want to consume more resources on a virtualization host than you have to. Those resources are usually put to better use hosting virtual machines.
One big exception comes into play if the backup location is separated from the host server by a WAN link. If you are backing the server up across a WAN then you should perform deduplication at the source as a way of minimizing the amount of data that needs to be sent across the WAN.
Dig deeper on Backup for virtual servers
Related Q&A from Brien Posey
Independent backup expert Brien Posey discusses various types of cloud DR services available and how they stack up when it comes to DR testing.continue reading
Brien Posey outlines five hurricane preparation steps to take if your organization does not already have a formal DR plan in place.continue reading
Independent backup expert Brien Posey discusses why change management has become even more important in today's world of virtualization and the cloud.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.