I'm on the article, "I am the master data", a simple analysis of digital data in the world as a means of production should be more rational organization and management, so that producers of data actually owns the data. Data from centralized to decentralized inevitable. Then the storage system and storage technologies should also be prepared for the decentralized data.
I also mentioned in the text is the best way to establish a unified standard memory, just like the Internet, like building a standard storage network, a unified protocol, unified interface, different companies that can provide the storage infrastructure and transport, individuals can choose different storage service provider, just as you replace the network operator as easy. Benpian simply talk about decentralized storage in the end what are the benefits.
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What is the edge storage
Storing the edge (Edge Storage) is stored in the data directly to the data collection point without the collected data (real time) to the central storage server (or cloud storage) by way of a network data storage. This is stored in the end (edge) of the distributed storage mode that is stored, or may be referred to the center of the store.
Give some examples to illustrate: 1) public surveillance cameras, the camera locally stored data, real-time processing, no need to transfer all data to a central computer room; 2) family of data center, the user very much hope that the data stored in their own homes, rather than storing the company provided security, in fact, want to provide the best service company does not touch the data, taking into account privacy and security. Data 3) collection of car networking can often be pre-processed in the end, a small amount of data transmitted after the finishing of the service center.
Why now proposed edge storage
This sentence can also turn to ask, why now mainly used to store the center, rather than the edge storage? A very important reason is that the data processing center, processing power edge device is not enough, this one. Second, there is no good technical solutions to be linked with each other edge nodes, the edge is more to assume the task of data collection.
Similarly, this problem is now proposed, because 1) With the development of chip technology, computing power and processing speed of the terminal device have been increased significantly, especially large-scale development and use of camera video codec technology, the cost of such equipment greatly reduced in the data collection terminal may have been better data processing; rapid development 2) to the center of storage technology, such as Libp2p IPFS employed, can solve the problem of local interconnect terminal devices, may edge linking and processing.
For example, take the car networking, data captured by the camera on the car can be stored locally, as the car is running in an area with a lot, they will gather a lot of duplicate data, but also complementary data. When the data is stored locally, on a street with cars can be linked to each other to integrate real-time data, you need to upload the data is greatly reduced.
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What are the benefits brought edge storage
Edge storage needs including more efficient use of network bandwidth, reliability, security and privacy protection.
Efficient use of network bandwidth
When we use the data center to store data, all the data to be transmitted to the center, bandwidth demand is great. When we talk about things, and discuss the industry tens of trillions of times, if we can not solve the problem of transport, the development of the Internet of Things will be greatly hampered.
However, if we move to the edge of the store, the move to save bandwidth is huge, so to speak network can support almost unlimited amount of applications for the promotion of things it can be said to be decisive.
We know, because the data is too large, the data center can not hold all the data, usually electronic monitoring are saved only a few days, or weeks, most most months of data. If these data can be saved in the end, in fact, the demand for storage from the center to the edge, and does not increase the storage costs.
Deployment will be easier
From the storage to the storage center marginalization, of course, requires some changes in the architecture, however, such changes will make clearer the architecture, the data processing terminal is divided into two portions of a central processing and handling. In the apparatus now increasingly high performance end of the case, each end device is a computer (such as most of them are now running Andiod system), is no longer a simple fool data acquisition device. And hierarchical classification process will be easier, logic clearer.
Greater fault tolerance
When the processing of data is completely decentralized, when the issue of any network problems, or the data center itself, will result in service interruption. Affected face enormous.
And when the terminal device having some processing capability, data is also stored in the terminal, the requirements of the network is greatly reduced, only affect a part of network outages small part, because many can also be treated locally. Meanwhile, when the local peer to peer network can be established, the redundancy of the network will be part of the solution of network outages. Fault tolerance has been greatly enhanced.
Both security and privacy
当今如果我们要能够随时随地访问我们的私人数据，我们的办法是把我们的数据放到云上去，比如阿里云，百度云。但是，你担心你的隐私问题吗？你的数据安全吗？你是否会存储所有的数据到云上？更多的时候，我们这样做是因为我们没有别的选择。
为什么家庭安防，智能家居的发展如此缓慢？这其中很重要的也有一个隐私问题。当你在家里安装好摄像头，如果你需要通过一个服务提供商才能看到家里的情况，你当然会担心隐私泄漏。存储到端加上点对点的网络技术可以帮助解决这个问题。在新的更好的解决方案里，你不需要把数据存储到网上，数据就在你家里的HomeNAS上，由于数据处理能力的增强，所有数据都是可以加密存储的。而通过P2P网络，你可以建立你的端设备和你家里的数据中心的点到点链接，让数据私密传送，同时兼顾安全与隐私。
与边缘计算相结合
存储到边缘有一个非常大的好处就是与边缘计算相结合，前面讲了车联网的例子，能够大大节省带宽，能够提供网络冗余。
同样考虑安防的情况，如果你可以对你家的摄像报警系统进行配置，设置报警的条件，多数情况下视频信息是不需要上传的，只有在出现异常情况才需要占用网络带宽和外部资源。另一方面，对于视频而言，可以考虑不同的视频流的传输，比如本地存储高清晰高解析度的视频流，而在网络上传输的可以是低码率低清晰度占用有限带宽的数据，既可以解决实时监控的问题，如果有需要也可以进行进一步的分析。
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边缘存储网络带来爆发式增长
前文提到的还仅仅是边缘存储本身可能带来的好处。如果再进一步，边缘存储之间建立链接呢？这种不用通过中心化的服务器，边缘存储自身可以链接和共享的话，将会带来非常多的有趣的应用。
最容易想到的就是网络加速，利用边缘存储建立分发网络，由于设备非常分散，分发加速的效果将远远好于当前站点有限的CDN网络。试想，如果你愿意分享一部分存储用于分发，那么你所观看的热门电视剧就可以被邻居直接下载使用，这一方面对网络带宽是极大的节省， 另一方面，你也可以通过分享获取部分收益。
当边缘存储进入实用阶段，去中心化的应用也更容易建立。基于地域的社区将可以不通过中心服务器，或通过服务商进行交互。也更容易建立基于社区的私有网络。
同样，由于基于边缘存储的点对点网络的建立，使得应用或服务商之间的数据共享变得更加容易和便捷。在一个理想化的情况下，服务商或应用提供商完全可以不拥有数据，而数据本身属于数据的生产者，这样一来，数据的拥有者就完全可以把这部分数据分享给不同的应用或者服务，用于产生超额价值。比如说，远程医疗可以让病人把自己的检查结果存储在本地，而病人可以支配自己的检查报告，用于提供给不同的医生或医院进行诊断。同时，如果病人愿意，也可以匿名地分享给研究机构作为科研数据。
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一个更分散化的网络时代更能满足社会发展的需求，也是接下来几年的发展的趋势。今天，边缘存储，物联网，5G，边缘计算这些新兴科技的发展，使得这一切变得现实和急迫。这不只是未来的可能，也是一条不得不走的路。
作者：胡飞瞳
链接：https://www.jianshu.com/p/585935132321
来源：简书
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