您可能已经知道公共(Public)云和私有(Private)云之间的区别。也有一个混合云(Hybrid cloud )。本文快速浏览了这些类型的云计算(cloud computing)之前的定义和差异 ，以解释哪种云最适合您和您的组织。
公共云(Public Cloud)与私有云(Private Cloud)的区别
公共云基本上是由第三方提供的服务。它可以同时在同一台服务器上为不同公司托管存储。不同公司的程序员可以使用它来同时构建和执行他们的代码，而不会干扰彼此的活动。简而言之，公共云对所有订阅者开放，不同客户可以同时访问。同一台服务器可以迎合不同的客户，可以容纳不同客户的数据。
在私有云的情况下，有专用的服务器。这些服务器包含来自单个组织的数据。它提供了一个平台，用于与组织的人员一起工作，它是为此而构建的。
在公共云环境中，它是随用随付的情况。客户只需为他们正在使用的云的部分和服务付费。他们不必担心公共云的其他不可访问部分，因为它们与他们或他们的组织无关。在私有云中，管理员必须照顾整个云。他们应该确保该设置确实满足将其称为云的必要要求。因此，私有云模式的成本更高，因为公司必须购买所有所需的服务器并支付处理云的员工的费用。
公共(Public)云或私有云——哪个(Private Cloud – Which)更好？
尽管大多数人会认为这是基于您的预算，但我会说必须根据您所从事的业务类型分配预算。当然，如果你的预算不大，而且你买不起一个云来存储你所有的数据，你可以有一个半私有云，也就是混合云。但这基本上取决于你想做什么。
数据可以分为不同的类别。不同的企业有不同类型的数据，这些数据可以归类为非常敏感到不太敏感。如果您的业务处理非常敏感类型的数据，例如客户的信用卡信息等，则无论预算如何，您都必须拥有本地云，因为与私有云相比，公共云更容易受到黑客攻击。
也就是说，此类组织的数据也可以部分存储在本地服务器上，部分存储在公共云上。数据中不太敏感的部分进入公共云以节省服务器和维护成本，而最敏感的部分进入本地云。这种设置通常被称为混合云——鉴于该公司使用将公共云链接到私有云的算法，反之亦然——当然，使用两步验证和加密等方法来确保数据安全，有充分的预防措施，等等
说到加密，大部分公有云都没有提供好的加密系统。数据到达服务器后可能会被加密，但从组织计算机到公共云的路径可能不会加密。此外，从我阅读的有关该主题的不同文章中可以看出，公共云上的加密方法并不好。在这种情况下，私有云或混合云也是最佳选择。另一方面，如果您愿意承担一些风险并且数据不是很敏感，您可以在将数据传输到云之前使用多种技术（或可用的加密软件）中的一种对其进行加密。
预算(Budget)也是一个限制因素，但正如我之前所说，数据的敏感性应该有助于您决定是选择公共云还是私有云。混合是两全其美的，因为您可以为不太敏感的数据支付更少的费用，并为敏感数据使用专用服务器（私有云）。
使用云的业务类型也是决定选择哪种云的一个因素。如果您需要一个平台来创建和测试应用程序，那么有几个云可以提供此类功能。同样(Likewise)，如果您的业务需要基础架构并且不希望对其进行太多投资，您可以选择基础架构(Infrastructure)即服务(Service)类型的云。如果您的企业没有什么可存储的并且更倾向于一般操作，那么您可能会选择公共云，因为从长远来看它会节省很多。另一方面，专用云将难以设置并且同时被证明成本高昂。
您将要开发的云战略需要稍微考虑一下，它应该包含以下内容：
- 云需要什么？
- 您的组织打算使用什么样的用途（这可以有多种选择，如存储、软件创建、测试、提供在线服务等）
- 使用私有云的总(Total)成本与使用公共云的总成本
- 如果可能的话，如何通过将某些流程委托给公共云来降低成本以提供更好的数据保护，同时提供良好的服务
我敢肯定，在许多情况下，答案会归结为拥有一个小型但专用的本地云以及将公共云用于大多数操作。也就是说，在大多数情况下，答案可能是同时使用公共云和私有云，即所谓的混合云。但是，这又完全取决于您的业务性质，因为必须根据要求安排预算(budget has to be arranged as per the requirements)。
接下来你想读哪一本？(Which one of these would you like to read next?)
- 云服务和微软云的类型
- 云计算的未来
- 云计算的安全问题
- 云计算和网格计算的区别(Difference between Cloud computing and Grid computing)。
Public Cloud vs Private Cloud: Definition and difference
You probably already know the difference between Public clouds and Privatе cloυds. There is one Hybrid cloud too. The article takes a quick look at the definitions and differences before these types of cloud computing going on to explain what kind of cloud is best suited for you and your organization.
Public Cloud vs Private Cloud difference
A public cloud is basically a service offered by a third party. It can host storage for different companies at the same time and on the same server. It can be used by programmers of different companies to build and execute their code at the same time, without interfering with each other’s activities. In a nutshell, the public cloud is open to all subscribers and can be accessed by different customers at the same time. The same server can be catering to different customers and can be housing data of different customers.
In the case of private clouds, there are dedicated servers. These servers contain data from a single organization. It offers a platform for working with people of the organization for which, it was built.
In a public cloud environment, it is paid as you go situation. Clients pay for only the portion and services of the cloud which they are using. They need not worry about other, inaccessible portions of the public cloud as they are not related to them or their organization. In a private cloud, the admins have to take care of the entire cloud. They should see to it that the setup is indeed meeting the requirements essential for it to be termed cloud. Thus, costs are higher in the private cloud model as the company has to buy all the servers required and pay the staff handling the cloud.
Public or Private Cloud – Which is better?
Though most would argue it is based on your budget, I would say the budget has to be allotted based on the type of business you are doing. Of course, if your budget is not big and you cannot afford a premise cloud to store all of your data, you can have a semi-private cloud, that is, the hybrid cloud. But it essentially depends on what you wish to do.
Data can be categorized into different categories. Different businesses have different types of data that can be categorized as being very sensitive to less sensitive. If your business deals with data of very sensitive type – for example, the clients’ credit card information, etc., you have to have a local cloud irrespective of the budget as public clouds are more prone to hack attempts as compared to private clouds.
That said, data of such organizations can also be stored part on local servers and part on public cloud. The less sensitive part of the data goes to the public cloud to save on server and maintenance costs while the most sensitive part goes to the local cloud. Such a setup is normally called a hybrid cloud – given that the company uses algorithms that link the public cloud to the private cloud and vice versa – of course, with ample precautions to make the data secure using methods like two-step authentication and encryption, etc.
Talking of encryption, most public clouds do not provide a good encryption system. Data may be encrypted once it reaches the server but the path from organization computers to the public cloud may not be encrypted. Further, the encryption methods on public clouds are not pretty good as evident from different articles I read on the topic. In such cases too, a private or a hybrid cloud is the best option. On the other hand, if you are willing to risk somewhat and the data is not pretty sensitive, you can encrypt the data using one of the many techniques (or encryption software available) before transferring it to the cloud.
Budget is also a constraint but as I said earlier, the sensitivity of data should aid you in deciding whether to go for public or private cloud. Hybrids are the best of both worlds as you can pay less for less sensitive data and use dedicated servers (private cloud) for sensitive data.
The type of business with the cloud is also a factor in determining what type of cloud to choose. If you need a platform to create and test apps, there are several clouds offering such functionality. Likewise, if you need infrastructure for your business and do not wish to invest much into it, you can go for Infrastructure as a Service type clouds. If your business has nothing much to store and is more inclined towards general operations, you might opt for a public cloud as it will save a lot in the long run. Dedicated cloud, on the other hand, will be difficult to set up as well as proving to be costly at the same time.
A little thought has to go into the cloud strategy you will develop and it should incorporate the following:
- What is the need for the cloud?
- What kind of usage does your organization intend (this can have multiple options like storage, software creation, testing, providing online services, etc)
- The total cost of using a private cloud vs Total cost of using public cloud
- How can the cost be cut down to offer better protection to data while providing good services by delegating certain processes to the public cloud if possible
I am sure that in many cases, the answers would zero in to having a small but dedicated on-premise cloud as well as using public cloud for the majority of operations. That is, in most cases, the answer could be the usage of both public and private cloud which is called a hybrid cloud. However, this again depends solely on the nature of your business as the budget has to be arranged as per the requirements.
Which one of these would you like to read next?
- Types of Cloud services & Microsoft Cloud
- The Future Of Cloud Computing
- Security issues with Cloud computing
- Difference between Cloud computing and Grid computing.
