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Tags: Disaster Recovery
Author: iland
Date: August 23, 2016

Backup vs. Disaster Recovery vs. DRaaS

The IT industry loves lingo – and marketers love branding. The combination can lead to a rather cluttered wasteland of terminology that obscures meaning, rather than adding clarity. So, to strip it all back, let’s talk about the differences – in plain English – between backups, DR, and DRaaS.

Definitions and Differences

Backups: A backup is simply a snapshot of your virtual machine, typically taken once a day. Backups are usually:

  • Automatically configured to happen daily, after close of business
  • Stored for a period of time, with a retention policy like “one a day for a month and one a month for a year”
  • Kept in a place separate from the primary system, like a basement, another data center, the back of a Honda, or, in the case of Backup-as-a-Service, in the cloud.

Backups are great for legal reasons, data protection and so on. Backups aren’t great for business continuity. Why? Well:

  • The last copy you have is last-night, which is usually stale. Most business applications change a lot during a day.
  • To re-awaken a system from a backup takes time. First, you need a ready-and-working system, rebooted and happy – and then you have to mount the backup. The whole process isn’t speedy. If the backup is (more safely) stored elsewhere, there’s the travel-time of getting it to the primary location, as well.

Disaster Recovery: DR systems replicate your data on an ongoing basis from a primary location to a secondary location. Usually:

  • Replication periods are measured in minutes, or even seconds. So, the last copy is fairly fresh.
  • The secondary copy is held in stasis (like a ghost, or horcrux, for the Harry Potter fans) until it is re-animated via a fail-over trigger
  • The secondary location can be another data center in another region, or even the cloud, in the case of DRaaS.

DR is fantastic for business continuity because you can trigger a failover and be live at the secondary location in minutes. While some systems do enable an archiving-type function, most folks agree that replication itself is not really the right tool for long-term data storage.

Disaster Recovery-as-a-Service (DRaaS): If you don’t have access to a secondary location – or don’t want to pay for it – DRaaS enables you to execute the same Disaster Recovery replication with the cloud as your secondary location. In that case:

  • The speeds involved are similarly fast: minutes or seconds to recovering systems
  • You pay only for storage while the systems are replicating/in stasis – and once they fail over, you’ll pay for CPU and Memory resources, as you consume them
  • You will want to vet the cloud as an operating environment for your workloads – meaning, it better be secure, have excellent customer service, etc.

DRaaS is a great way to achieve business continuity goals quickly and more cheaply than owning a secondary data center yourself.

If you have any questions, please contact us. We’ll be happy to help.

Categories: Cloud Backup, DRaaSBy ilandAugust 23, 2016
Tags: Disaster Recovery

Author: iland

iland has been helping customers transform their mission critical applications to the Secure Cloud for hosting, protection, and recovery for over two decades. During that time, we have learned a great deal about exceeding customer expectations from every aspect of the cloud journey.

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