Developing Multi-tenant Applications for the Cloud on by Dominic Betts PDF

By Dominic Betts

How are you going to create an software that has actually worldwide succeed in, and will scale quickly to satisfy surprising large spikes favorite? traditionally, businesses needed to put money into an infrastructure able to helping such an software themselves, and plan for top demand—which usually implies that a lot of the means sits idle for a lot of the time. in general, merely huge businesses might have the to be had assets to danger such an enterprise.
The cloud has replaced the foundations of the sport. through making infrastructure on hand on a “pay as you move” foundation, making a vastly scalable, international software is in the achieve of either huge and small businesses. convinced, by way of relocating functions to the cloud you’re giving up a few keep watch over and autonomy, yet you’re additionally going to profit from diminished expenditures, elevated flexibility, and scalable computation and storage.
This consultant is the 3rd unencumber of the second one quantity in a sequence approximately home windows Azure. It demonstrates how one can create from scratch a multi-tenant, software program as a provider (SaaS) software to run within the cloud through the use of the home windows Azure instruments and the expanding diversity of services of home windows Azure.
The advisor specializes in either solid perform layout and the practicalities of implementation for multi-tenant functions, but additionally incorporates a wealth of knowledge on elements akin to safeguard, scalability, availability, and elasticity which are appropriate to every kind of cloud hosted applications.
The advisor is meant for any architect, developer, or info know-how (IT) expert who designs, builds, or operates purposes and prone that run on or have interaction with the cloud. even supposing functions shouldn't have to be in line with the home windows working process to paintings in home windows Azure, or be written utilizing a .NET language, this advisor is written for those that paintings with home windows established platforms. you have to be conversant in the .NET Framework, visible Studio, ASP.NET MVC, and visible C#.

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The light package may limit the number of surveys a subscriber can create or the number of survey responses that a subscriber can collect each month. Offering a product where different subscribers can choose different features and/or quotas requires that you design the product with that in mind. Such a requirement affects the product at all levels: presentation, logic, and data. You will also need to undertake some market research to determine the expected demand for the different packages at different prices to try to estimate your expected revenue stream and costs.

Both single-tenant and multi-tenant applications use this feature to scale out when they run on Windows Azure. Windows Azure also offers various instance sizes that enable you to scale up or scale down individual instances. 0 Integration Pack for Windows Azure, can handle in a standard and configurable way the transient faults that may occur because of throttling. 15 16 ch a pter t wo Figure 3 shows how you can scale out the application by running a variable number of instances. In Windows Azure cloud services, these would be multiple instances of your web and worker roles.

For a more detailed exploration of data security issues in multi-tenant applications, see Chapter 6, “Securing Multi-Tenant Applications,” of this guide. In all multi-tenant applications the design must ensure that tenants can access only their own data. To achieve proper isolation you must be sure not to reveal any storage account keys, and be sure that all queries in your code access and return the correct tenant’s data. For all the data storage mechanisms described in this section, if the tenant provides the subscription this makes clear that the tenant owns, and is responsible for, the data stored in any storage account or database in the subscription.

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