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Yes, the servers are multi tenant. <br />
AWS has an (expensive) option to run your virtual instances on dedicated, single tenant hardware. <br />
Azure doesn't.
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Yes, the servers are multi tenant.
AWS has an (expensive) option to run your virtual instances on dedicated, single tenant hardware.
Azure doesn't.

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What's the difference between single tenant and multi tenant from a cloud perspective and what's the risk ?
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What's the difference between single tenant and multi tenant from a cloud perspective and what's the risk ?

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In other words - you are safe to use multi tenant unless there is an external regulation or licensing requirement.
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In other words - you are safe to use multi tenant unless there is an external regulation or licensing requirement.

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Not a big deal. &nbsp;Colleagues already described &quot;multi-tenant&quot; and &quot;shared spaces&quot;.<br />
If you find some affection from &quot;collocation&quot; you will be able to change the type of &quot;clouding&quot; at any time.
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Not a big deal.  Colleagues already described "multi-tenant" and "shared spaces".
If you find some affection from "collocation" you will be able to change the type of "clouding" at any time.

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We are looking at a new application which will be hosted on the cloud. There will be some sensitive information the provider holds. We haven't decided on Azure or AWS yet<br />
<br />
Our INFOSEC people are asking if the data will be held on servers that are multi-tenant? <br />
<br />
From a cloud perspective, what does this really mean? What is the real risk here?
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We are looking at a new application which will be hosted on the cloud. There will be some sensitive information the provider holds. We haven't decided on Azure or AWS yet

Our INFOSEC people are asking if the data will be held on servers that are multi-tenant? 

From a cloud perspective, what does this really mean? What is the real risk here?

Multi-tenant vs single tenant on Cloud

Cloud computing, also known as on-demand computing, is a kind of Internet-based computing where shared resources and information are provided to computers and other devices. It is a model for enabling ubiquitous, on-demand access to a shared pool of configurable computing resources. Cloud computing and storage solutions provide users and enterprises with various capabilities to store and process their data in third-party data centers, relying on sharing of resources to achieve coherence and economies of scale.

Cloud Computing

Amazon Web Services (AWS), is a collection of remote computing services, also called web services, that make up a cloud-computing platform  operated from 11 geographical regions across the world. The most central and well-known of these services include Amazon Elastic Compute Cloud, also known as "EC2", and Amazon Simple Storage Service, also known as "S3". Other services include Elastic MapReduce (EMR), Route 53 (a DNS web service),  provides a highly available and scalable Domain Name System (DNS) web service, Virtual Private Cloud (VPC), storage, database, deployment and application services.

Microsoft Azure is a cloud computing platform and infrastructure for building, deploying and managing applications and services through datacenters. It provides both platform-as-a-service (PaaS) and infrastructure-as-a-service (IaaS) services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems. Cloud Services is a PaaS environment and can be used to create scalable applications and services; there are specific software development kits (SDKs) provided by Microsoft for Python, Java, Node.js and .NET. Azure also has file and storage services, data management, analytics and DNS services.