The SaaS platform is one or a collection of computer programs that collectively acts as the host of the computer applications that is residing on it. Aside from that, the SaaS platform is also responsible for tenancy partitioning, scaling, monitoring and metering, and distributing services.
Tenancy Partitioning- In general, applications that are written in one tenant fashion have little or even no function in serving a number of customers. One example is a specific application database. If the database is designed to cater only to a single customer, then this prevents other customers from storing their data in that same particular database. Additionally, the execution of an application cannot possibly be partitioned nor shared by customers.
Scaling- An SaaS application intentionally aggregate the demands for all users and customers into a single virtual or physical location. In any SaaS application, therefore, being able to support the said aggregation is an important requirement. So as to achieve scaling, the SaaS application should be designed in a manner conducive to scaling, while still being able to support the required auxiliary pieces.
Monitoring and Metering- SaaS applications are also required to meter and then monitor the usage from the data as well as the execution standpoints. Generally, this is closely related with the monetization and the scaling models. Also, most of these applications are extracted into platform layers wherein the platforms then become responsible for the metering of the user and the tenant usage, while monitoring the system events as well.
Distributing Services- SaaS platforms are responsible in distributing services into the system to achieve the tasks of performing business logics.
Companies that distribute SaaS platforms these days have effectively introduced varied services to the market but generally, they have followed the basic principals mentioned above.