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Nowadays, computers have become an indispensable tool for people in the information society. The data storage operations such as copying files, saving photos, collecting movies, etc. are the most basic functions of computers. In today's Internet and computer inseparable, when users store and back up various files, will they choose local storage (such as hard disk, USB flash drive, CD, etc.), or use the rich resources of the Internet to store and back up data?
In the past few years, U disk has quickly surpassed traditional floppy disks by virtue of its small size, light weight, large capacity, moderate price and convenient carrying, making it the preferred tool for convenient storage. However, with the advent of the "cloud storage" era, storing files, photos, and movies in "cloud disks" has increasingly become the "favorite" of young people. With a "cloud disk", no matter where you go, as long as there is the Internet, data can be retrieved at any time, and digital storage on the Internet is easier than ever. However, due to the security risks of the network, although the cloud computing hype is very hot, there are still many people who are discouraged because of their security. This paper discusses the advantages and disadvantages of cloud storage in cloud computing environment.
1. Cloud Storage Overview1.1 Definition of cloud storage
Cloud storage is a new concept extended and developed in the concept of cloud computing (cloudcompuTIng). It refers to the application of a large number of different types of storage devices in the network through clustering applications, network technologies or distributed file systems. The software is a collection of systems that work together to provide data storage and business access functions.
Cloud storage is the storage part of cloud computing, essentially providing storage and management for large data volumes. With regard to cloud storage, the Global Network Storage Industry Association defines a service that provides configurable virtualized storage and related data over a network. When the core of computing and processing of cloud computing systems is the storage and management of large amounts of data, cloud computing systems need to be configured with a large number of storage devices, then the cloud computing system is transformed into a cloud storage system, so cloud storage is a data storage system. And management as the core of the cloud computing system. In other words, cloud storage is actually a new storage mode that puts data resources on the network and is accessible to users at any time. In recent years, a number of commercial software companies have launched their own cloud storage products and services, including Microsoft's Azure, Google's GFS, Amazon's S3 and more.
1.2 Types of cloud storage
Cloud storage is not a simple storage method, but a service based on the Internet. It has the characteristics of mass storage, easy expansion, unified management, low cost, free reading, and resource sharing. For the user, the cloud storage device is completely transparent, and the user can access the data through the network connection with the cloud server. Cloud storage is divided into the following three categories:
(1) Public cloud storage
Like Amazon's S3 (SimpleStorageService) and Nirvanix's storage services, they offer a large amount of file storage at a low cost. Suppliers can keep each customer's storage and applications independent and private. Public cloud storage can be drafted out for use as private cloud storage. With private cloud storage, a company can own or control the infrastructure and the deployment of applications. Private cloud storage can be deployed in enterprise data centers or facilities in the same location. Private cloud storage can be managed by the company's own IT department or by a service provider.
(2) Internal cloud storage
This kind of cloud storage is similar to private cloud storage, the only difference is that it is still inside the corporate firewall.
(3) Hybrid cloud storage
This cloud storage combines public cloud storage with private cloud storage/internal cloud storage. Mainly used for access according to customer requirements, especially when temporary capacity needs to be configured. Scheduling a portion of capacity from public cloud storage to configure a private or internal cloud storage can help companies face rapid growth in load fluctuations or peaks. Despite this, hybrid cloud storage brings the complexity of integrated public cloud storage and private cloud storage distribution applications.
2. Analysis of the advantages and disadvantages of cloud storage2.1 Advantages of cloud storage
Cloud storage services offer many fascinating advantages. It can be paid for by volume, without capital expenditures, and users will not need to purchase additional equipment even if storage requirements increase in the future. The storage capacity can be dynamically adjusted and only pay for the actual capacity used. Cloud storage has the following advantages:
(1) Capacity scalability
Unlike storing data directly on a hard disk, the capacity of cloud storage can be easily adjusted to meet the needs of users. Select the appropriate storage configuration based on the type and total amount of files that users need to store online. If the user only needs to store some PDF files, then he only needs a small amount of storage space, which may not even require the user to pay for the service. This is because most service storage vendors offer their users free storage. If the user wants to store some large files, such as videos and pictures, then he needs to upgrade his account to ensure that he can get more storage space. There is a thing that is particularly suitable for users' needs about cloud storage, which is to adjust according to the space capacity required by users to dynamically meet user needs. And users can upgrade storage accounts at any time to increase storage space. Compared with upgrading the hardware system to adapt to changes in demand, this saves us a lot of trouble and reduces the cost.
(2) Cost and cost savings
The reason people turn to cloud services today is that they can save money when they use Internet services. For example, the cost of the VoIPPBX service provided by RingCentral is very effective because he introduced the power of the Internet to connect calls. The same is true for cloud storage services. You can save money when we use the Internet to save copies of data. Using cloud storage services can help users save money in several ways. On the one hand, cloud storage can help us eliminate the need to store data using hardware. Users no longer have to purchase, maintain, and upgrade computer systems, hardware drivers, and CDs to back up data. Another way to save costs is that users can use cloud storage services for free. As long as we don't need more than free storage, we don't have to pay the provider to continue to use it for free. For most individual users, free storage is sufficient. GoogleDrive gives users 15GB of free storage, and users can store thousands of documents and PDF files. In addition, Mega provides users with a free 50GB storage space, users can store several albums or even a certain length of video on the cloud storage.
(3) Tailored according to customer requirements
When cloud storage products provide their storage space, they are not only the space itself, but also provide a tailor-made solution according to the needs of users. Each type of user has different information requirements, and different information applications have different requirements for storage devices. Only when treated separately, can we achieve the greatest satisfaction in performance and safety while saving costs.
For a simple example, such as monitoring video data and database file data, these are two different types of data, requiring different types of storage devices. The characteristics of the surveillance video data are that the required storage space is large, the video data has low reuse rate (the general monitoring video is stored in the storage device), and can be overwritten (the general monitoring information can be saved for half a month). The characteristics of database files are that they need to be stored for a long time, the capacity requirements are not high, they need to be reused, and they need to be accessed frequently. These two different types of data have different characteristics and require different performance storage devices. For surveillance video, the storage device is required to have a large capacity. Performance can be slightly lower; for database information, storage devices are required to have high input and output performance, data fault tolerance mechanism, and so on.
In the short-term and long-term, the biggest feature of cloud storage services is that they can reduce costs for users, and the use of cloud storage can avoid some unnecessary consequences of using local storage. Using a cloud storage service makes it easy to access a user's files. As long as they are connected to the Internet, we can use any computer, smartphone or mobile computing device to access and even edit files stored on the cloud.
2.2 The disadvantage of cloud storage
(1) Transmission speed problem
One of the biggest challenges facing cloud storage is performance. At present, most professional technicians encounter performance bottlenecks, that is, from broadband to web connection, from the competition of multiple users to the network speed (depending on the level of broadband service you choose) to the performance of the network service provider's network equipment, etc. All of these factors can affect broadband performance. In addition, the performance of the cloud service center itself and the performance of the entire network have also become factors influencing the speed of cloud storage. With these issues in mind, we can understand why cloud storage does not provide the same performance as local and network disks. In many cases, it takes a few minutes to replicate two gigabytes of data using local storage, and for cloud storage, the same operation can take several hours to complete.
(2) Hidden dangers of data security
When users store data in the cloud, the user's data information is no longer completely controlled on the local computer. Of course, most cloud storage offers VPN, encryption, or other security measures. However, these do not strictly prevent people with ulterior motives from illegally accessing data placed on the cloud storage server by obtaining login privileges. This is not just a security issue for cloud storage, all cloud service-based technologies use a similar connection model. Also, login credential information for mobile cloud users (such as users using unsecured wireless networks) is easily blocked and security threats are increased. This means that users using cloud storage must carefully consider potential security issues and deploy appropriate security technologies (such as additional encryption layers or two-step authentication), which of course will impact performance and increase the cost of cloud storage.
(3) Data ownership issues
When the user's data is stored on the local computer, we can process the data at any time and have absolute control. When the data is stored in the cloud service, the control permissions are reduced. Because the user does not necessarily know which data center the data information is stored in, it does not know whether the data can be copied and used by some people, and may even be stored abroad, and allows unauthorized individuals to access the data.
(4) Is it reliable?
Most cloud service providers are committed to the security of cloud storage, but the service disruption of Amazon's elastic cloud service in the previous stage and the cloud data hosting outage incident that Microsoft has appeared indicate whether users can access themselves. The cloud storage data depends on whether the service provider's service is reliable. If the service provider has a problem, the user cannot access the data stored in the cloud service. Therefore, the reliability problem is currently a problem that cloud storage needs to solve.
3. ConclusionThe most logical application of cloud storage is the ability to collaboratively share documents, spreadsheets, and other files with remote and mobile users, and as cloud services evolve, the strengths and weaknesses of cloud storage will change. For example, the emergence of platforms as services (PaaS) and software as a service (SaaS), the transfer of local storage to cloud services can simplify management and backup trivia. Alternatively, the user can select the hybrid storage, that is, copy the local storage to the dual storage mode of the cloud service, and the data stored in the cloud service can be accessed by the remote user or the branch user, and backed up as an offsite. With this hybrid storage approach, both local and remote users can access data.
The trick of using cloud storage is to weigh the strengths and weaknesses and use this technology reasonably according to its own characteristics, rather than blindly following the trend. With the establishment of common sense and proper planning, cloud storage can be a useful tool for today's enterprises.
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