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Software as a Service

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Tripod uses Software as a service (SaaS) which is a model of software deployment over the internet. With SaaS, a provider licenses an application to customers for use as a service on demand, either through a time subscription or a "pay-as-you-go" model. Also known as "software on demand," the SaaS model allows us to behave as vendors to develop, host and operate software for customer use. Rather than purchase the hardware and software to run an application, customers need only a computer or a server to download the application and internet access to run the software.

Implementation


We use the "maturity levels" of SaaS architecture, whose key attributes are configurability, multi-tenant efficiency, and scalability. Each level is distinguished from the previous one by the addition of one of those three attributes:

* Level 1 -

 

Ad-Hoc/Custom: At the first level of maturity, each customer has its own customized version of the hosted application and runs its own instance of the application on the host's servers. Migrating a traditional non-networked or client–server application to this level of SaaS typically requires the least development effort and reduces operating costs by consolidating server hardware and administration.


* Level 2 -

 

Configurable: The second maturity level provides greater program flexibility through configurable metadata, so that many customers can use separate instances of the same application code. This allows the vendor to meet the different needs of each customer through detailed configuration options, while simplifying maintenance and updating of a common code base.

* Level 3 -

 

Configurable, Multi-Tenant-Efficient: The third maturity level adds multi-tenancy to the second level, so that a single program instance serves all customers. This approach enables more efficient use of server resources without any apparent difference to the end user, but ultimately comes up against limits in scalability.



* Level 4 -

 

Scalable, Configurable, Multi-Tenant-Efficient: The fourth and final SaaS maturity level adds scalability through a multitier architecture supporting a load-balanced farm of identical application instances, running on a variable number of servers. The provider can increase or decrease the system's capacity to match demand by adding or removing servers, without the need for any further alteration of applications software architecture.

 

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