KuCoin announced the first project Spotlight line for MultiVAC (MTV), the purchase will take the first come first served principle, KuCoin platform KCS as Token replacement purchase coins. CoinMarketCap display market, KuCoin platform KCS currency traded at $1.32, or 22.61% 24h.
March 20th (Wednesday), KuCoin Exchange issued the official announcement that the Spotlight platform will be on line recently, Spotlight aims to block chain project started to raise public capital early, rare power quality projects to the market, to create a good starting point.
MultiVAC to Odaily the daily planet revealed that after the Spotlight line, ERC-20 and Token will be issued on the date exchange, the relevant shares will implement mapped on the main line.
MultiVAC is a public use chain project slicing expansion. They also proposed a concept different from cloud computing “elastic computing network”, which is the chain of DApp developers can according to their business needs based on the selection of scalability, security, to the center of the demand in different dimensions, the underlying network will contract transaction allocation to different points slice. Developers also need to deploy according to their business contract.
The team in mid 2018 $15 million financing. Official website shows, investment institutions from South Korea, the United States and Europe, including IDG, Hong Thai capital, venture capital and other investment institutions of 10 and NGC, JRR Crypto, Hashed Arrington, XRP and other digital asset investment fund.
Previously, Odialy told the daily planet MutiVAC had reported in detail, please refer to the specific project of the following article:
The first “star | introduced a storage node +” elastic computing “, MultiVAC completed a $15 million financing”
The | gourmets and Lu Xiaoming
| editor Lu Xiaoming
At present, slicing technology (Sharding) is an important direction of public chain expansion program, is considered to be more feasible and long-term expansion theory. Expansion, usually refers to the ability to process high frequency traffic system. The expansion plan is mainly to solve the problem through the performance upgrade block chain system, in order to achieve large-scale application of block chain technology.
This paper introduces the daily planet Odaily MultiVAC is also a public use chain project slicing expansion. They also proposed a concept different from cloud computing “elastic computing network”, which is the chain of DApp developers can according to their business needs based on the selection of scalability, security, to the center of the demand in different dimensions, the underlying network will contract transaction allocation to different points slice. Developers also need to deploy according to their business contract.
The core idea of slicing is “divide and rule”, give an inappropriate example, slice like scheme in the high-speed toll station opened on a plurality of congestion charging channels to ensure the traffic speed, reducing road traffic pressure. Slice technology still faces many problems, including: each slice of data stored in too many nodes switch is required for a large amount of data synchronization; patch means nodes involved in a transaction verification and consensus reduction, easy for malicious attackers control; inter slice transaction problems.
Therefore, we can not let the industry landing slice scheme satisfied. Then, slicing MultiVAC have what characteristics? Summed up in one sentence, they think, block chain capacity bottlenecks in computing, while in storage and transmission.
MultiVAC features list
Node role: to reduce the storage cost
The first feature of MultiVAC is introduced, the storage node, reduce the storage cost of miners node.
The need to split the block chain, the premise is the trading volume to the single system is difficult to carry, at the same time as the amount of data surge, ordinary notebook computer is not enough to store the whole network books.
In order to reduce the storage of data, ensure to the center, MultiVAC introduced the storage characters of nodes, the nodes are divided into storage node, node and node three miners light, do not need to have the whole network books.
In the first piece of miner nodes elected block node, verify and package (the need to block out the storage node called Merkle Proof to demonstrate the pen input is not used), broadcast slice, and then sent to the storage node synchronization.
The miners node function is to store the information (Qu Kuaitou), and is responsible for verifying the transaction, with control data. The storage node is stored in all the books in it, somewhat similar to the super node role, large storage capacity, there is a certain threshold, but the difference is only store transactions and assist in transaction verification, without any control of the data, which go to the center of the characteristics. MultiVAC CTO Cheung said the storage node can be understood as the network node based service providers, similar to the network provider (mobile, Unicom, telecom) role.
Is the key points of the design, proof of abstract information + + transaction storage node node can be directly used miners transaction to provide, to verify the transaction. Only store transaction summary information, reduce the amount of data miner nodes, but also reduces the miners access threshold, ordinary PC can be added.
MultiVAC believes that reducing amount of data storage is more advantageous in node random transform slice.
Safety and to the center line. The existence of patch degradation of safety, safety requires thorough to the center. The design of MultiVAC miner nodes and storage nodes also play a role here.
Suppose a slice has 100 nodes, to attack the slice, just know what is the 100 nodes, a big security risk. Therefore, most of the programs are piecewise piecewise nodes need regular transformation. MultiVAC vice versa, every few minutes, the patch will switch the miners.
Several MultiVAC each storage node corresponding to the chip is fixed, but the miners node is not fixed, by means of VRF transform, and storage nodes have no control over data. The miner nodes store only summary information, the total data size is very small, so do not have to worry about the migration of miners. Otherwise, the miners in the transform piece or need to keep large books data, or need to have the whole network books. Should Cheung believes that this is caused by the switching period is long (most scheme means less security), and only a part of the switching node.
Xiang should summarize, miners and storage nodes need to business, is directly proportional to the volume of slice, has nothing to do with the whole network data, and each piece is completely independent.
Fixed transmission quantity, guarantee the separate cross piece transaction
Slice technology have to face the problem is to realize the cross piece transaction, if there is no cross piece trading, not due to the interaction of each slice, there is no difference between single and.
The idea that the block in the chain of transactions are atomic, must ensure the operation involved to reach a final agreement, which is either completed or not, a start. Therefore, to coordinate inter chip operation, to ensure the correct operation. According to “Wang Jiaping: the so-called” public chain slice “technique five lies” article: “at present, the method used is the concept of thread synchronization, lock exchange involving state, to prevent other non related transactions interfere with the state, until the completion of all transactions after the release of the operation. But the problem is that the processing method, locked state, the other part of the execution slice is blocked, other pieces of work can not be normal, but the situation with the increasing number of fragments, inter slice number of transactions increased, the more obvious obstruction.”
Should the transaction MultiVAC Xiang said, cross piece with different ideas. To ensure that every piece of independent.
Every piece of MultiVAC, regularly sync other slice area size, each block a piece inside, there is a space in the new state records other slices, and then cross piece transaction processing.
Patch 1 launched at a time after the transaction, the transaction is confirmed in the block height H1; (2 pieces at a height of H2), and the deal is reflected in the slice 2, slice 2 is needed at a certain height (usually the next block, such as h2+1) to read from the 1 slice H1 high degree, will put the money up 2 points. Here is a bit like, A bank account in exchange for a sum of money to the B account, A display has been deducted, but B is not immediately received during the inter slice network congestion may occur in trading delays, but does not affect other transactions in normal. MultiVAC uses the eventual consistency to ensure the slice 2 can in order to get all the pieces from the 1.
The advantage is that you can put the cross piece transaction costs are fixed, does not increase with the cross piece transactions increase, and increase the cost of storage is very small. “If a man a piece the size of the area is about 100 bytes (byte), if 64 a slice is probably 6KB.”
As for the disadvantages, should respond to “Xiang, if looking for a malpractice, should be a cross piece trading after the receiver receives the money, and not immediately turn out, need to wait for a synchronization (about 10s). For example, A to B a piece of money, immediately transferred to B C, the two transactions in BTC and ETH can be simultaneously in one block, MultiVAC needs a synchronization. But this immediately pay demand is very rare.”
The economic application of landing attention sharing
The daily planet Odaily doubt that the MultiVAC scheme reduces the storage cost, but the increase in the number of transmission costs, will affect the floor plan? In this regard, should Xiang responded: “yes, 70% increase the amount of data to be transferred, but like Java 10 times slower than C++, but many people use Java, because of the development of low cost a lot. Here is the same reason.”
He further explained the logic: the storage node to provide evidence that the miner nodes can not only in books, has a concise summary information, it verifies the transaction and block the legality. This is the price, more of a part of the data transmission (information). The 70% is not the amount of data compression, in fact we compressed is probably equivalent to 20-25% so that the future can be compressed to a smaller.
But on the other hand, the traditional block chain each transaction broadcast time, once the business volume increased, the single node will be overwhelmed. On the one hand, the fragmentation mechanism allows a transaction only need to broadcast in the film. On the other hand, for the on-chip data, MultiVAC is not confirmed the transaction to the storage node, the storage node can broadcast a number of trading time, the miners into their own memory pool. So the number of transactions greatly broadcast less, but the amount of data broadcast 20-25%, on the whole network load drag is not serious.
MultiVAC has completed the underlying trading scheme, the single slice TPS was about 500; the contract patch is still in development, the application of the floor is expected in the second half of 2019, more concerned about the economic aspects of the application sharing.
From the view of future, slicing technology is still facing many problems. At present, the mainstream technology of slice divided into network slice, slice and slice transaction state three levels, the technical difficulty is also increasing. In the concrete floor there are still many problems to be solved, such as consensus, PoS, network delay.
The consensus mechanism, should Cheung believes that there is not currently a perfect consensus mechanism, MultiVAC is used in two yuan + Byzantine group signature.
As for the incentive mechanism, MultiVAC said that the miners node is mainly mining revenue, incentive mechanism of storage node considering competition (tender nature) mechanism, ideally there will be a balance, similar to the Ethernet gas workshop fee.
The team is currently about 25 people, including 17 technical and 7 operations. The MultiVAC technical team from Harvard, Dr. Standford, Tsinghua computer and Nanyang Polytechnic, and senior engineering experts, Google Facebook and beauty group reviews. CEO Lv Heng, former U.S. chief technology officer and paid people pay co-founder, CTO CTO; Xiang is associate professor of Tianjin University, Nanyang Technology University, doctor of computer parallel algorithm and general computing domain experts. CMO Wang Chen, former U.S. group product manager, paid people pay market operation director, Curie house (formerly McCain home network co-founder).
According to reports, the team in the 2018 year 1500 million dollars financing. Official website shows, investment institutions from South Korea, the United States and Europe, including IDG, Hong Thai capital, venture capital and other investment institutions and nine NGC, JRR Crypto, Hashed Arrington, XRP and other digital asset investment fund.
I am Odaily reporter for the daily planet of prosperity (micro signal wsuixin12), editor Lu Xiaoming (lohiuming), plus friends please note Name, unit, position and reason.