Cloud-based services have the need for massive scaling and moderate performance while being very cost effective. Cloud storage providers have a key decision to make as it relates to clustered NAS. The distributed nature of the cloud services also plays into the hands of clustered NAS quite well. Most of these solutions have replication built into the OS. Replication isn’t an add-on like in traditional storage; the capability is basically a part of the operating system itself. Clouds need this distribution of data for both protection of that data in the event of a site failure or in the distribution of those data for streaming applications.”]
Source: https://www.darkreading.com/database-security/clustered-nas-in-the-cloud