Advertising blockchain Technology

1. At present, blockchain is most widely used in the field of financial technology, such as digital asset trading. As a kind of underlying technology, blockchain is the technical implementation of bitcoin. The rapid application of blockchain technology also needs virtual currency. In the past, a large-scale economic scenario requiring mutual trust and extensive cooperation between many people can only be solved by centralization, with low efficiency. The emergence of blockchain technology has solved this problem and eliminated this center. One of the important reasons to get rid of this center is that virtual currency provides an endogenous economic incentive mechanism for the blockchain, so that people have the motivation to participate in the economic activities after the transformation of the blockchain. Of course, blockchain will have more extensive and mature applications in more fields in the future. For example, in November last year, State Grid submitted a patent application named "power transaction control method and device about blockchain". This year, Xi'an City Wall International Marathon also used blockchain technology for the first time in the world to collect athletes' competition data, data and data All the information such as the winning part is registered on the blockchain. With its traceable and tamperable technical characteristics, the information channel between the events is opened up, which effectively ensures the reliability of the competition results.

2.

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

3. This shouldn't be asked, is it OK? If you can choose, who will choose to lose money? It's still OK. After all, we all want to make money in investment. Although we can't guarantee that we can make money, we have done enough preparation, so we still hope to make money.

4. At present, only a professional rights protection team in Singapore can recover the blockchain. It depends on whether you have been cheated into losing money or not

5. I have invested in small chain finance, and the effect is good.

6. College students have no right to sign labor contracts, but they can establish labor relations with employers, and the corresponding wages can not be delayed.

7.

We can't be too superstitious about technology

I support blockchain technology, but I don't believe in blockchain. I don't believe that blockchain is a panacea that can solve all kinds of problems{ RRRRR}

I have talked so much about it. To sum up,

first of all, I admit that blockchain technology can play a role and find business opportunities in this event

secondly, I hope that both technology providers and project owners should pay attention to blockchain technology and avoid superstitious belief in blockchain. They should not think that blockchain can be used once and for all

thirdly, as far as the Tencent and Lao Ganma incidents are concerned, I suggest that the managers of both sides should check and fill the gaps from various aspects, strengthen internal risk control, and punish the responsible person accordingly, so as to warn others and rece the occurrence probability of such incidents as far as possible. Especially for bat enterprises, with the increase of enterprise scale, more attention should be paid to internal risk control to prevent big enterprise disease