I agree. IaaS is suitable for moving legacy applications to the cloud, as it provides the underlying infrastructure (virtual machines, storage, networks, etc.) that you can configure to run your existing applications without needing to make significant changes to the application's architecture.
You cannot "install" legacy software in the cloud. It is now a "legacy" s/w because it no longer gets technical (update/patching/management) support from the ISV.
You can do a "lift and shift" migration of the On-Prem solution, in the cloud, while using a DB solution that closely mirrors the legacy DB.
i think that's wrong because using PaaS you don't have full control over the operating system and you can't install your "legacy DB". So you need IaaS.
One solution would be to use a new DB within azure - that would be PaaS.
From chatgpt,
Infrastructure as a Service (IaaS)
This option provides the flexibility and control necessary to support a legacy database and application during the migration to the cloud.
Since App1 is using a legacy database, it may have specific system requirements (e.g., a particular database version, OS dependencies) that would be challenging to accommodate. IaaS allows you to move your existing application and legacy database as-is to the cloud. You get full control over the operating system, virtual machines, and networking, enabling you to configure the environment to meet the legacy system's needs.
App1 to the cloud is infrastructure as a service (IaaS).
The reason for this is that IaaS allows you to have greater control over the operating system, networking, and other infrastructure components, which is important when you're working with legacy applications. With IaaS, you can still use your legacy database and other existing components, while taking advantage of the scalability and cost savings offered by cloud infrastructure.
Platform as a service (PaaS) and software as a service (SaaS) are not ideal for legacy applications as they may require extensive modifications to the code or may not be compatible with the existing infrastructure. PaaS may be suitable if the application can be easily refactored or modernized to work on a new platform, while SaaS is most appropriate for applications where you don't have control over the underlying infrastructure or code.
B. infrastructure as a service (IaaS) is the correct service model for moving App1 to the cloud because it requires access to a specific operating system and database environment. IaaS provides the flexibility to host legacy applications and databases without having to make changes to the underlying architecture. With IaaS, you can manage the infrastructure and the application while the cloud provider manages the underlying hardware.
You can move your app top PaaS service and use a datagateway to connect with your data or migrate intire solution (App + DataBase) in a VM (IaaS).
I think the solution is PaaS because the sentence only refer to the app.
the question indicates that Only the app is migrating to the cloud, at that point nothing suggest that the DB would follow.
so assuming only the app is concerned by the migration to cloud, PaaS is a logic answer
You have to read this very carefully. It only states that the APP is being moved to the Cloud. There is no indication in this text that the database must be moved or must be installed on a VM as well.
So the APP is PAAS.
(And yes, seperated from this question. A Hybrid Cloud is probably needed)
This is what #85 says, a web app and on-prem db (Hybrid).
This is actually what I thought about this scenario...the only difference with #85 might be considering the app legacy as well (and not a web app) so IaaS makes sense because you move both.
Guys I'm not sure about the answer. They are talking about moving just the app from legacy db( db unsuitable for modern apps) to cloud ,not the db. So the answer should be PaaS right? Please correct me if I'm wrong.
This is a bad example. No info about app and db on the same host. It says app connects to legacy DB, not the app is legacy. I can put the app on PaaS and DB on IaaS.
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