A Brief Introduction to Cloud Computing by Todd Hoff
Author:Todd Hoff [Hoff, Todd]
Language: eng
Format: azw3, epub, pdf, pdf
Publisher: Possibility Outpost Inc.
Published: 2018-03-30T16:00:00+00:00
Like for IaaS, the cloud provider does all the work in supporting PaaS. The developer doesnât have to do anything. They just use the service and pay the fee.
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Software as Service (SaaS)
One level above PaaS is Software as a Service or SaaS. Ordering a pizza delivered to your house, thatâs SaaS.
With SaaS, developers are not involved, customers use a full-blown software product, not a service used in building some other product.
Thatâs worth repeating. Both IaaS and PaaS are services used by developers to build products. No end user will ever use IaaS or PaaS directly. They are exclusively for developers.
SaaS is meant for end users to use directly.
A great example of SaaS from Microsoft is Office 365. Once upon a time you may have purchased Microsoft Word, Microsoft Excel, and their whole Office Suite on a CD and installed it on your computer at work or home.
Not anymore. Microsoft offers Office in the cloud now. They call it Office 365. For a yearly fee, you can use Office over the internet as a service. You donât have to install anything, maintain anything, upgrade anything, or do anything but use it. Microsoft does all the work for you.
Thatâs what SaaS is, software rented and used over the internet. You donât typically buy SaaS software, itâs subscription based. Like a magazine, you pay monthly or yearly.
Other examples of SaaS are: Salesforce, Quickbooks Online, Gmail, Google Apps, Zendesk, DocuSign, Slack, and DropBox.
And just like with IaaS and PaaS, with SaaS you donât do any maintenance. Everything is taken care of for you. Thatâs why you pay the big bucks for SaaS.
Will a SaaS product be implemented in a cloud like AWS? You donât know. All you see is the user interface; you know very little about how the software is implemented on the back-end. You assume itâs reliable, secure, scalable, and is backed-up regularly, but you donât know.
Salesforce, a customer relationship management product, runs their own datacenters. That makes sense for them. Salesforce is a huge established business. They have the resources to do everything for themselves.
Slack, a team messaging product, uses AWS because they are a startup. Slack wants to get as many customers as fast as possible. This means they want to concentrate on developing features rather building out infrastructure.
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