Construction Engineering blockchain Technology

1.

From the perspective of technology and architecture, I will tell you my understanding of blockchain in common language

what is blockchain? In a word, blockchain is a storage system. To be more specific, blockchain is a distributed storage system without an administrator and each node has all the data

What are the common storage systems like

first, how to ensure high availability

the common storage system usually uses "rendancy" to solve the problem of high availability. As shown in the figure above, if the data can be copied into several copies and rendant to multiple places, high availability can be guaranteed. The data in one place is hung, and there is data in other places. For example, the master-slave cluster of MySQL is the same principle, and the raid of disk is also the same principle

two points need to be emphasized in this place are: data rendancy often leads to consistency problems

1. For example, in the master-slave cluster of MySQL, there is actually a delay in reading and writing, which means there is a inconsistency in reading and writing in a short period of time. This is a side effect of data rendancy

The second point is that data rendancy often reces the efficiency of writing, because data synchronization also consumes resources. If you add two slave libraries, the write efficiency will be affected. The common storage system is to use rendancy to ensure the high availability of data

so the second question, ordinary storage system, can write more

the answer is yes, for example, take this graph as an example:

in fact, MySQL can do a master-slave synchronization of al masters, master-slave synchronization of al masters, two nodes can be written at the same time. If you want to do a multi room multi live data center, in fact, multi room multi live data synchronization. What we should emphasize here is that multi-point writing often leads to the consistency problem of writing conflicts. Take MySQL as an example, suppose that the attribute of a table is self incrementing ID, then the data in the database is 1234 now. If one of the nodes writes and inserts a piece of data, it may become 5, and then these 5 pieces of data are synchronized to another master node, Before synchronization, if another write node inserts a piece of data, a piece of data with self incrementing ID of 5 will be generated. Then, after the generation, synchronize to another node, and the synchronized data will conflict with the two local 5's after it arrives, which will lead to synchronization failure and write consistency conflict. This problem will occur in the case of multi-point writing

how to ensure consistency in multi-point writing

the reform "Swan class" gives you more technical work

2. The definition of Chongqing jinwowo analysis blockchain technology is as follows:
1. Blockchain is a distributed database (system) placed in a non secure environment
2. The blockchain uses cryptography to ensure that the existing data cannot be tampered with
3, the blockchain uses consensus algorithm to reach consensus on new data
the system with the above three properties is blockchain.

3. At present, blockchain technology is mainly used in finance, medical treatment, authentication, smart contract, sharing economy, digital assets and other fields. In the future, it may break through the application of all walks of life, such as Internet, energy, proof of existence, social media, government departments, kindness, health, music right, etc Applications in many fields such as consumers:
there are relatively few blockchain technology R & D companies, and Heshu software is an innovative company for blockchain technology R & D
according to the relevant data report of the UK, at present, more than half of the world's large companies (with more than 20000 employees) are considering and actively deploying blockchain technology. In addition, among all the enterprises surveyed, two thirds of them said that they would incorporate this technology into their systems by the end of 2018. This also confirms the unlimited potential of blockchain in the future development of enterprises.

4. Who can say, how about mining? Mining refers to the use of bitcoin mining machine to obtain bitcoin, that is, the computer used to earn bitcoin. If you can get bitcoin, you can make money. This kind of computer generally has professional mining chips, and works by installing a large number of graphics cards, which consumes a lot of power. The computer downloads the mining software and then runs a specific algorithm to get the corresponding bitcoin after communicating with the remote server< First, the principle of Mining:
1. As long as there is a computer that can access the Internet and download the bitcoin program from the bitcoin website, the first run will generate a digital account, and then keep running, the program will continuously calculate a series of "mathematical problems". When you have successfully calculated "a mathematical problem", the, It's possible to get a certain amount of bitcoin
2. Bitcoin is a P2P network. To keep the network running, it is necessary to keep someone uploading and sharing data to others online. Bitcoin network needs someone to contribute computer resources for computing to ensure the operation of bitcoin network. Therefore, bitcoin is designed that whoever contributes computing power to keep the network running can get the fee paid by the network bitcoin< Second, mining security mechanism:
Mining creates a competition mechanism equivalent to lottery, and it is very difficult for anyone to continuously add new trading blocks to the block chain. This mechanism can prevent any indivial from obtaining the ability to freeze certain transactions, thus ensuring the neutrality of the network. This mechanism can also prevent any indivial from replacing part of the block chain to rece their own costs
precautions:
1. It's better to do DIY mining machine by yourself, from purchasing accessories to assembling, and then to mining software, to learn, focus, practice and graally understand the blockchain
2. Mining is actually a fixed investment process: regardless of the currency price, a certain amount of positions will be increased every day
3. The bitcoin wallet used to store bitcoin uses military level encryption, which makes it impossible for hackers to steal easily. Bitcoin wallet also allows users to set two passwords, a public account password and a private password. The user of public account password is to let the user receive bitcoin. If users want to withdraw or transfer bitcoin from their accounts, they need to use a private password.

5.

According to the general office of the Ministry of housing and urban rural development, it has decided to carry out green construction pilot work in Hunan Province, Shenzhen city of Guangdong Province and Changzhou City of Jiangsu Province. The pilot areas should vigorously promote the integrated application of BIM Technology in the design, proction and construction stages of pilot projects, and take 5g, Internet of things, blockchain, artificial intelligence and other technologies as the support to promote the application of intelligent equipment and equipment such as intelligent construction sites and construction robots, so as to realize the traceability of project quality, improve project quality and management efficiency, and enhance the level of construction informatization. With the continuous development of information technology, the world has officially entered the digital era. In the digital wave, more and more enterprises join the team of digital transformation. How to effectively protect data security will become the core competitiveness of this era

blockchain has the advantages of decentralization, distributed accounting, encryption and traceability, which can ensure the integrity and authenticity of the data on the chain. Once it is tampered or forged, it can be found. At the same time, because the blockchain has the characteristics of Distributed Accounting, even if the data on indivial nodes are deleted, other nodes can still save the data completely, ensuring the normal operation of the whole blockchain storage system. Based on the above advantages, blockchain is naturally suitable for electronic data storage. The introction of blockchain can effectively solve the authenticity and legitimacy of electronic evidence and make the process of electronic data storage more reliable

since the national development and Reform Commission incorporated the blockchain into the new infrastructure, the whole country has ushered in the upsurge of blockchain policy. The central and local governments have promulgated blockchain related policies one after another, taking the blockchain as the main breakthrough in the field of new economy and technology, building the future strategic competitive advantage, and the related application scenarios of blockchain are hot. The deep integration of blockchain and instry is the embodiment of maximizing the use of blockchain< since 2014, easysaving has begun to deepen the research and development of underlying technology and application innovation of blockchain from the perspective of instry. Based on the electronic data preservation of blockchain, easysaving has launched a number of brands such as Junzi signature in the field of blockchain electronic signing, micro right in the field of blockchain intellectual property protection, and zhongzhengbao in the field of blockchain Internet justice