Disadvantages of blockchain

1. There are many consensus mechanisms in the blockchain. The advantage of the pow consensus mechanism behind bitcoin, the most influential one, is that it is secure and can not be tampered with. The disadvantage is that it is too slow to process only seven transactions a second

2. At present, there are still many problems in the practical application of blockchain technology, such as low performance, less transaction frequency per unit time, lack of technology application ecological environment, lack of relevant application cases and fraud in the name of blockchain.

3. It's a coincidence that I happened to study in the hashton blockchain training institution recently. The characteristics of blockchain are tamper proof, distributed, consensus mechanism and smart contract. In the future, we can help customers solve the problem of business trust through chain reform technology.

4. Hello, we are Shanghai wanglian Information Technology Co., Ltd. compared with traditional technology, blockchain has the property that cannot be tampered with. Vonetracer, the blockchain traceability system launched by our company, adopts a variety of data acquisition methods, one thing and one code, which is true and reliable. It applies instry-leading technology, and the bottom layer adopts the baas platform of blockchain service developed by wangchain. This kind of technical characteristics can ensure that the data is different from the traditional traceability, and the data reliability will be greatly improved.

5. At present, there are four main types of consensus mechanisms: pow, POS, dpos, pool
1. POW workload proof, which is familiar with mining, calculates a random number that meets the rules through and or operation, that is, obtains the bookkeeping right, sends out the data that needs to be recorded in this round, and stores it together with other nodes in the whole network after verification
advantages: complete decentralization, free access of nodes
disadvantages: bitcoin has attracted most of the computing power in the world, and other blockchain applications using POW consensus mechanism are difficult to obtain the same computing power to ensure their own security; Mining causes a lot of waste of resources; The period of reaching consensus is long, which is not suitable for commercial application.

2. Proof of rights and interests of POS, a mechanism of upgrading consensus of pow; According to the token proportion and time of each node; It can rece the difficulty of mining in equal proportion, so as to speed up the speed of finding random numbers< Advantages: to a certain extent, it shortens the time to reach a consensus
disadvantages: mining is still needed, which does not solve the pain point of commercial application in essence

3. Dpos share authorization certification mechanism is similar to the voting of the board of directors, in which the coin holders cast a certain number of nodes to verify and account on their behalf
advantages: greatly rece the number of participating verification and accounting nodes, which can achieve second level consensus verification
disadvantages: the whole consensus mechanism still depends on token, and many commercial applications do not need token to exist

4. Pool verification pool, which is based on traditional distributed consistency technology and data verification mechanism; It is a consensus mechanism widely used in the instry chain at present.
advantages: it can work without token, and realizes second level consensus verification on the basis of mature distributed consistency algorithms (pasox and raft)
disadvantages: the degree of decentralization is not as good as that of bictin; The multi center business model is more suitable for multi-party participation

it has great advantages in using consensus mechanism to ensure data consistency (the consensus mechanism is first proposed by ripple, and the network transaction synchronization mechanism with data correctness priority. In the consensus network, no matter how the software code changes, if you can't reach a consensus, you can't enter the network, let alone fork)
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PS: a little black, although the consensus mechanism can absolutely ensure that there will be no hard bifurcation at any time. However, the disadvantage of this mechanism is obvious, that is, it is much longer than the current bitcoin network to reach a consensus with other nodes. In extreme cases, the consequences of disconnection in ripple consensus mechanism network are also very terrible

it is possible that one day after the power failure in your home, the whole system will no longer be able to reach a consensus with other rippled nodes (in fact, the consensus mechanism requires more than 80% of the nodes to acknowledge your data before your submission will be accepted by other nodes, otherwise it will be rejected by exclusive nodes), Even you can only empty all your 500 GB data and resynchronize to connect to other ripple nodes

so at present, the existing rippled end is not suitable for civil use (if it is commercial, the impact is relatively small. For example, RL's own rippled node is hosted in Amazon cloud data center. If it has no response for a long time, it can make high claims, and there is almost no break in that place except for large disasters). This is one of the aspects RL has always wanted to improve.

6.

Recently, many friends have come to ask questions about blockchain, such as the specific advantages of blockchain, why to invest in blockchain, and what benefits can it bring? Can't you invest in real estate and wait for the appreciation; Can't you invest in a mature market like stocks and bonds? Why invest in the emerging blockchain? Does blockchain have any investment value? And so on a series of questions, I have made the following summary, basically summarized the answers to most of the related questions:

< p class = "ikqb_ image_ Blockchain is regarded as an important part of the fourth instrial revolution. We all know that every instrial revolution will bring leaping progress of human proctivity. The history of human development is actually a history of proctivity progress.

it can be summarized in the following four aspects:

1. Blockchain has a good market prospect; 2; As an emerging technology, blockchain is recognized by many professionals including investors. It is estimated that the market value of blockchain will be about US $60 billion in 2020 and US $20 million in the global market in 2024. The considerable market prospect of blockchain is obvious

2. The cost of block chain is less; Compared with the centralized mode of relying on third-party intermediaries such as credit card payment and stock trading, the decentralized distributed structure of blockchain saves investors high handling fees and transaction costs, saves investment costs and improves transaction processing efficiency

3. Block chain is more secure and stable; The traditional centralized mode often faces serious credit crisis, but because each transaction in the blockchain is tracked and permanently recorded by the distributed public account book, the phenomenon of forgery is greatly reced, and the losses caused by the credit problems of the third party are avoided, providing security for investors' transactions

4. The programming attribute of block chain is more standard; Traditional market investors often affect their earnings because of the confusion of market levels, and the programmability of blockchain makes the market level clear, which is an innovative technology that can change people's lives

I hope it can help you to solve related problems. Please feel free to ask or discuss more details or any questions