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What is a public cloud? Thorough explanation of the difference from the private cloud!

Public Cloud
Public Cloud

Among the clouds in the IT industry, public clouds are gaining popularity as a cloud service that is easy for anyone to introduce and use. Before introducing this public cloud, it is important to understand what a public cloud is to some extent and how it differs from a private cloud that belongs to the same cloud. This time, we will explain the advantages and disadvantages of introducing a public cloud, the difference from a private cloud, and how to select a cloud service that suits your business.


table of contents

  • 1. The meaning of the cloud in the IT field
  • 2. What is a public cloud? What are the benefits of introducing it?
  • 3. What is a private cloud? What are the benefits of introducing it?
  • 4. Which cloud service should you choose?
  • 5. Know the difference between two cloud services and make the right choice

The meaning of the cloud in the IT field

Before explaining the public cloud, let’s first explain what the cloud is like in the IT field.

To put it simply, the cloud is a term that refers to “applications and services used via the Internet.”

An example of a cloud service is “iCloud”. iCloud manages image data, music data, video data, etc. of iOS devices in the cloud, so even if you change to a new iOS device, you can easily synchronize the data from there. In the past, it was necessary to purchase software to use these services, but with the advent of the cloud, data management has become easier, as long as you have an account for that cloud.

Another example of the cloud is “Gmail,” which is known as an email service. Gmail also has an app, but you can use it at any time regardless of your device by logging in with your Google account from your browser. On the other hand, Outlook for the same email service is not in the cloud. Outlook cannot be used on the browser, and you must always install the app and use it on the app.

It may be difficult for some people to think of the cloud as a cloud, but it may be recognized as “apps and services that can be used if there is an internet environment.” If you want to know more about the cloud, please refer to the article on another page.

■ What does “cloud” mean in the IT industry? What can I do?

And there are two types of cloud, private cloud, and public cloud. From the following sections, we will touch on these features and differences.


What is a public cloud? What are the benefits of introducing it?

The table below briefly summarizes what a public cloud looks like.

What is a public cloud?
meaning Private cloud service that can be used by an unspecified number of users
merit Anyone can use it immediately
Can be used at the lowest cost
The burden of management is reduced
Demerit I can’t fully demonstrate the efficiency of my work
May not be compatible with existing services

A public cloud is a private cloud service that can be used by an unspecified number of users.

Since the public cloud is a completely open cloud, it can be shared and used by all users in all environments including OS, software, and lines, not just servers. In addition, the public cloud uses a pay-as-you-go system, which is cheap for people who only need to use the minimum required. On the other hand, those who want the features they need separately can use the additional features by paying only for what they need, so that all users can use the cloud without paying unnecessary fees.

In addition, it is possible to reduce the burden on the person in charge of system management because maintenance management does not have to be done by themselves. However, it is often not possible to set the content of function customization by ourselves, and we cannot change maintenance management to our method. Therefore, it is difficult to fully demonstrate the efficiency of the business in the public cloud compared to the private cloud described later. In addition, you should be aware that the database or server of the service you are deploying is not compatible with the provided public cloud and may not be available in the first place.


What is a private cloud? What are the benefits of introducing it?

The outline and advantages/disadvantages of private cloud are as follows.

What is a private cloud?
meaning Private cloud service that can only be used by specific individuals or companies
merit Flexible system construction
Can be built according to security according to corporate policy
Operation management can be done outside the company
Demerit There will be a cost
Difficult to expand or contract functions

A private cloud is a private cloud service that can be used only by a specific company or individual, and the OS, software, and line can be set by the company (individual). Therefore, it is possible to freely customize and operate the cloud. It has the opposite characteristics of a public cloud that can be used by an unspecified number of people.

With an open cloud, it is not possible to rearrange it into a form that is easy for us to use, so a private cloud is suitable if business efficiency is the top priority. In particular, security policies are often set for each company, so it is possible to deal with such points if they are freely rearranged.

In addition, because it is a cloud service, you can manage the operation of data in the cloud even outside your company, so you can proceed with your business without delay even in an emergency. On the other hand, it costs more to rearrange freely. In addition, it has a built-in function that is introduced based on detailed calculations, so once it is introduced in the field, it will take a lot of time and effort to expand or contract the function later.

By the way, there are two types of private clouds, on-premises type and hosting type. On-premises means a form in which software and network equipment are owned and operated by the company, and on-premises private clouds are different from conventional on-premises environments in that the server environment is changed from physical to virtual. It is a cloud provided by changing too.

On the other hand, the hosted private cloud is a cloud where the server environment is provided by the hosting company and connected to the network by a method such as a VPN. Depending on which one you choose, the advantages in terms of cost, customization, security, etc. will change slightly.


Which cloud service should I choose?

Each of the two cloud services has its strengths and weaknesses, and if the appropriate one cannot be selected, cloud deployment will fail and wasteful costs will be incurred. Therefore, I will introduce how to choose a cloud service and the cases to choose for each cloud.


● How to choose a cloud service

There are four main ways to choose a cloud service.

  • Server and OS type
  • Charges according to data capacity and functionality
  • Security
  • support system

Cloud servers can be divided into three types: SaaS that can use software, PaaS that is used as a platform for application development, and IaaS that is provided as an infrastructure on the Internet by freely rearranging software and OS. In addition, there are several types of OS, mainly Linux-based OS and Windows-based OS are provided.

If you select these types according to the purpose of use of the cloud server, you can utilize the cloud service without feeling difficult to use. Even if you can use a cloud service that can be used somehow, if the basic charge, as well as the data capacity of the storage and the charge for additional functions, are too high, it will put pressure on the management.

You should always consider whether you are paying unnecessary fees and try to select only what you need and what you need. Since the cloud is a platform for managing data on the Internet, we must also be concerned about security. Regardless of which cloud you use, use one that has security measures such as encrypted communication and two-step verification.

In addition, when I just introduced a cloud service, I feel that I do not understand how to use it and how to think about it, and even people who are used to it to some extent often have troubles. It is also necessary to have a support system in place so that we can respond immediately in such cases.


● Cases where you should choose a private cloud

A private cloud is a cloud that is highly customizable and can be built so that it is easy to deal with security and troubles. In that case, it can be said that it is a complex and large-scale cloud that can handle all situations rather than a public cloud. From that point of view, private clouds are suitable for large companies and small and medium-sized enterprises of a certain size.

When introduced by an individual, the cost of a private cloud is high, so if you try to pay the cost with just one person’s income, it will be a considerable burden. Organizations with a large number of workers generate greater profits, and even if the cost increases to some extent, it is easy to prioritize the efficiency of operations and introduce a private cloud.


● Cases where you should choose a public cloud

The public cloud is a cloud that can be introduced at a low cost that even individuals can pay because the functions required by the pay-as-you-go system are additionally paid. It does not require time to build a cloud, and it is easy to use because it is lightly inoperable. At least for personal use, we recommend that you develop your business in a stance that suits you, rather than adapting to you.

On the other hand, if small and medium-sized enterprises and large enterprises adjust to the cloud side, the burden will be considered heavy, so basically it will be more advantageous to use a private cloud. Considering the specifications, even large companies and small and medium-sized enterprises may adopt the public cloud if it can be used without problems even if it is introduced.

Regardless of the size of the user, the security of the public cloud is slightly lower than that of the private cloud. If a failure problem occurs, rely on the hosting company and understand that recovery will take time before proceeding with the introduction.


● How to choose a cloud service that suits your business?

For cloud services suitable for businesses handled by companies, it would be more advantageous to comprehensively consider and select a private cloud and develop the system from scratch. It costs money and time and effort to introduce it, but it can be said that it is the best way for companies to use cloud services without failure.

Recently, an increasing number of companies have introduced their business systems to improve work efficiency, secure the work-life balance of workers through attendance management, and cut labor costs. Among them, cloud computing of business systems is attracting attention because it lacks security if it is a business system that can be handled on a browser.

This is true for both companies that build new business systems and companies that already have business systems. At this time, it is rare to make all business systems into the cloud at once, and basically, we will decide the range to make it into the cloud and the range to keep it on-premises, and gradually proceed with making it into the cloud. Therefore, when proceeding with cloud computing, we recommend that you outsource to a company that is strong in system development that specializes in cloud construction, and request system development that suits your business. Companies that are good at building clouds are summarized on the following page, so please check it out.

If you ever want to know about similar things, check out the Facebook page Maga Techs



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