Implementing data redundancy

Data redundancy is the process of storing multiple copies of data at different locations, in order to protect the data from events such as power failures, disk failures, network failures, and even major catastrophes such as entire data center outages. Azure Storage provides multiple options for data redundancy both at local data center levels and across data centers. We can broadly group the options into these two categories:

• Primary region redundancy
• Secondary region redundancy

Let's look at these options in detail.

Azure storage redundancy in the primary region

This type of redundancy covers localized failures such as disk failures, machine failures, and rack failures. There are two types of primary region redundancy, as detailed next.

Locally redundant storage (LRS)

With this type of redundancy, the data is copied three times across multiple machines in the same physical region within a data center. This option provides...