When you need to implement a certain cloud-based system recovery technology, you have two routes to choose from, but the costs and risks are different.
Backup is usually a good strategy. You need to have the ability to back up data and applications somewhere so that you can keep your business running and avoid the collapse of critical systems under certain natural or man-made disasters.
We have a complete solution that provides backup sites and backup technologies. They can be passive, which means you can restore the site and restart operations in a short time. Or it can be proactive (higher cost), which means that the disabled system can be republished and taken over with current data and code without the user's knowledge.
In the cloud computing environment, disaster recovery includes a new set of options that look very different from the options you have on your local system. The approach you ultimately take should match the value of the application and data set to the business. I suggest that you carefully consider the practicality of all these operating options to ensure that your costs will not exceed the value of the disaster recovery configuration.
Option 1: Disaster recovery from zone to zone
You can set up two or more regions in the same public cloud provider to provide disaster recovery capabilities. So, if the Virginia area is removed, the rest of the country can take over.
You can spend money to copy an exact copy of the data and applications to the backup area so that they can take over seamlessly (ie active recovery). Or you can use a more cost-effective method, such as scheduled backup to passive mass storage, in order to quickly restart operations in another area (ie passive recovery).
Option 2: Cloud-to-cloud disaster recovery
The most common question I have is: If the entire public cloud provider is destroyed or out of service for a long time, how can we protect ourselves?
For example, using a public cloud to provide a backup to another public cloud allows you to use Amazon Web Services to back up Azure, or vice versa, or do some other pairing.
Although this seems to be the ultimate goal of disaster recovery—and the ultimate goal of avoiding risks—in order to support disaster recovery, multi-cloud computing means retaining two different skill sets, having two different platform configurations, and other costs and risk.
However, performing cloud-to-cloud system replication (also known as inter-cloud replication) greatly increases the possibility of errors. Especially when trying to replicate the primary backup platform, this is definitely not what you want to see. Although not impossible, inter-cloud replication can be five times more difficult than in-cloud replication within the same vendor. This is why, with the exception of a few examples, there are almost no organizations supporting cloud-to-cloud replication.
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