What are SaaS, PaaS, IaaS, and DaaS? A clear explanation of each difference
Have you ever heard the terms “SaaS” or “PaaS”?
These are the classifications of “cloud computing systems” performed over networks.
You might ask, “I’ve heard you somehow, but I don’t know …”
Therefore, this time, I will explain in detail the differences between SaaS, PaaS, IaaS, and DaaS that are common among cloud services.
What is the cloud?
The cloud is an abbreviation of “cloud computing” and refers to a service that requires connection to the Internet.
Until now, data such as e-mails and various contents were stored in the storage of personal devices.
However, with the spread of smartphones and tablet devices, an environment where data can be accessed from anywhere at any time has been required.
That’s where the cloud service came in. A service that collects and manages data in one place via the Internet and provides it to users via a network.
Cloud means literally “cloud”.
There are various theories as to why the word “cloud” came to be used, such as “I used a cloud diagram when showing an intangible network.”
Difference between SaaS PaaS IaaS DaaS
The four most commonly used cloud services are SaaS, PaaS, IaaS, and DaaS.
The four cloud services are briefly described below.
SaaS: Software provision
PaaS: Providing a platform
IaaS: Provision of infrastructure such as virtual servers and networks
DaaS: Provision of desktop
Different software and platforms are provided.
There are quite a few people who say, “I know what we offer depends on the type of cloud service, but I don’t know which service to use.” We will now explain the four cloud services in detail.
First, I will explain about “SaaS”.
What is SaaS?
SaaS is an abbreviation of “Software as a Service” and is a service that provides software via the Internet. Previously, the software was provided as a packaged product. SaaS has made it available as a service via the Internet.
The main features of SaaS are as follows.
Data can be stored on the Internet
Data can be accessed from any terminal such as PC, smartphone, and tablet
Multiple people can share and edit the same data
Typical SaaS services
Specific SaaS services include Google Apps, Office Web Apps, and Dropbox.
Google Apps (Google Apps) is an online application pack for organizations that includes communication tools such as Gmail and office tools such as Google Drive and Google Docs.
Like Google Apps, Office Web Apps and Dropbox are applications that can be edited, saved, and shared online.
Advantages and disadvantages of SaaS
The advantage of SaaS is that data can be edited and stored on the Internet, which reduces the risk of data loss.
In addition, security is always up to date because updates are performed automatically.
On the other hand, if you cannot connect to the Internet, there is a disadvantage that the service itself cannot be used.
By the way, since it is already a prepared application, you can not customize it freely by yourself.
Next, I will explain “PaaS”.
What is PaaS?
PaaS (Platform) is an abbreviation of “Platform as a Service” and is a service that provides a platform for executing applications via the Internet.
PaaS is mainly a service for developers, and provides a platform for application programs on the Internet. As a result, it is possible to reduce the time required for creating applications and setting the environment.
The main features of PaaS are as follows.
Develop applications on the provided platform
You can build your own system using the platform
PaaS representative services
Specific services for PaaS include Google App Engine, Amazon Web Service, and Microsoft Azure.
Google App Engine is a PaaS that allows you to create and run applications on Google infrastructure. With Google App Engine, you no longer need to maintain the server yourself. Characteristically, if you simply upload an application, you can run it alone.
Advantages and disadvantages of PaaS
One of the advantages of PaaS is that it provides all the programming languages and management systems required for application development, as well as the base and development tools such as the OS, so there is no need to set up a complicated development environment, and it concentrates on system development. That is.
Also, applications that are already prepared like SaaS are not provided but must be started from the application development stage. Therefore, it can be customized freely. However, the programming languages and databases that can be used are limited to those provided by PaaS. As for the development environment, you can use only those that are set in advance, so you cannot choose the environment freely.
This is a disadvantage.
Next, I will explain about “IaaS”.
What is IaaS?
IaaS (Earth) is an abbreviation of “infrastructure as a Service” and is a service that provides infrastructure such as virtual servers and networks via the Internet.
By using IaaS, if you have an Internet environment, you can use IT infrastructures such as servers and virtual machines without purchasing hardware.
The main features of IaaS include the following points.
Create highly flexible applications and platforms Requires advanced expertise
Typical IaaS services
Specific services of IaaS include Google Compute Engine and Amazon Elastic Compute Cloud (EC2). Google Compute Engine provides virtual machines running on Google data centers and fiber networks.
You can host websites, deploy applications, store and analyze data on the same infrastructure that Google uses.
Advantages and disadvantages of IaaS
As an advantage of IaaS, you can freely choose the hardware specifications and OS types required when using the server.
On the other hand, because of its high degree of freedom in development, it requires specialized knowledge such as infrastructure design, server management, and operation skills.
You also have to do all the security measures yourself.
Difference between IaaS and VPS
I will explain the difference between IaaS and VPS.
VPS is an abbreviation of “Virtual Private Server”, and a virtual server is assigned to each user on a host OS installed on a physically existing server. Can be used as a server.
Since the user is the owner of the virtual server, he / she can have administrator privileges and can select the OS to install as well as install his / her favorite applications.
IaaS is more flexible
IaaS is a pay-as-you-go system, in which usage fees change depending on the resources used, making it easy to change resources.
On the other hand, since VPS is a monthly system, no matter how much resources are used within the contract, the fee does not change, but when changing resources, the contract itself must be changed, so it is more flexible than IaaS It can be said that the nature is low.
IaaS is not all about virtual computers
IaaS can operate firewalls (firewalls to protect against unauthorized access), load balancers (devices that balance the load on servers), and VPN, which are the front part of virtual computers.
On the other hand, if you try to build a network that includes a firewall with only VPS, a new contract is required, making it difficult to build as easily as IaaS.
Finally, I will explain about “DaaS”.
What is DaaS?
DaaS (Darth) is an abbreviation of “Desktop as a Service” and is a service that provides desktops via the Internet.
Users can call and use the desktop environment from the Internet simply by preparing the minimum necessary equipment such as a display, keyboard, and mouse.
There are three types of DaaS offerings.
Each feature includes the following points.
[Private Cloud DaaS] DaaS using its own cloud environment can be customized for in-house management Highly secure, comfortable and stable operation is possible
[Virtual Private Cloud DaaS] The DaaS shared part and the dedicated part that build a virtual desktop environment on IaaS and PaaS are combined, and the dedicated part can be customized
[Public Cloud DaaS] DaaS using a shared cloud environment Since resources are shared and used by multiple users, customization is low but costs can be reduced DaaS representative services
Specific services for DaaS include Windows Virtual Desktop, IBM Smart Business Desktop, and Citrix XenDesktop. With Windows Virtual Desktop, you can easily use VDI (Desktop Virtualization) and manage most of the management components on the Microsoft Azure side (a collection of cloud services that are constantly expanding to help meet business challenges).
It has the feature of managing and providing services. In addition, because Windows10 multi-session connection is possible, using Windows10 can provide VDI to multiple users with one virtual machine.
Advantages and disadvantages of DaaS
As a merit of DaaS, it is strong against virus infection and security. Since the data can be centrally managed on the server, there is no need to worry about data leakage even if the PC is lost.
In addition, DaaS is a cloud-based service, so it can reduce the initial cost of introduction.
On the other hand, in the case of virtual desktops, the desktop environment is deployed on the PC through the network, which increases the load on the network. Therefore, operation and data transfer may be slow.
Difference between DaaS and VDI
VDI refers to software that extends the desktop environment of a PC. It provides a virtual desktop environment for one display.
The difference between DaaS and VDI is where the desktop environment called from the user terminal exists and who provides the environment.
The desktop environment is deployed on the cloud, and DaaS is provided by an external company. The desktop environment is deployed on servers in the company, and VDI operates in-house.
Use SaaS, PaaS, IaaS, DaaS for each purpose
The difference between SaaS, PaaS, IaaS, and DaaS is, to put it simply, “how much to prepare as a cloud”.
IaaS can be freely customized from the stage of application and platform to application development, so it can be customized to your liking. However, specialized skills are required for development.
PaaS is located between IaaS and SaaS, so if you only want to develop applications, you can quickly develop while keeping costs down.
SaaS provides applications as package products, so there is no freedom of customization, but it can be used immediately, so it is recommended for cloud service beginners.
DaaS is a service already prepared like SaaS, so there is no need for development skills or effort. It is recommended for those who want to start at low cost without worrying about security because all software and data are in the cloud.
Thus, the optimal cloud service depends on the purpose and the degree of freedom of development.