Nodejs mining

1. Dog Coin Doge how to dig, buy dog coin can rise in the future? At the end of last year, a new kind of counterfeit coin, dog coin, appeared. At present, dog coin has been ranked second in Shanzhai coin, second only to Wright coin. So what if we get dog money? Today, I'd like to share with you my dog coin mining experience
generally, you can download the Dog Coin Wallet on the official website of dog coin. After downloading the Dog Coin Wallet, install it, and then set the display language to Chinese< br />
Download dogcoin mining software. For specific mining software, you can search "cudaminer-2014-02-09" on the Internet. Specific for different graphics cards, mining software is not the same. It is also divided into CPU mining and GPU mining. As I am currently using NVIDIA's graphics card, we use NVIDIA's graphics card as a test
after decompressing the mining software you downloaded, select different versions according to whether your computer is 64 bit or 32-bit, and then the mining software to the following directory: C: &# 92; Users\ Your user name & #92; AppData\ Roaming\ In the dogecoin folder, as shown in the following figure:
& 65532
select the mine pool. Here we recommend using the dogepool mine pool. Go to the address shown in the figure below, register your account, and then set up your miner< br />
after successful registration, log in to your account and create your miner. Click your user name in the upper right corner, and then select "my works" from the drop-down menu. At the bottom of the page, find "add a new worker" and enter the Miner you want to create and the password. As shown in the figure below:
& 65532< br />
after registering the miner, we start to configure the file and open C: &; Users\ Your user name & #92; AppData\ Roaming\ Dogecoin folder, and then create a new text document in it, add the following content: rpcuser = dogerppassword = wowaddnode = 162.243.113.110addnode = 146.185.181.114rpcport = 22555server = 1deamon = 1, and then save the file as dogecoin.conf
create a new text document, and then, Add the following: minewithamdgpu. Bat. / cgminer – scrypt - O stratum+ tcp://dogepool.pw :3333 -u USERNAME.WORKER -p PASSWORDMineWithNvidiaGPU.batcudaminer.exe -o stratum+ tcp://dogepool.pw :3333 -O USERNAME.WORKER:PASSWORDMineWithCPU.batminerd -a scrypt -t 4 -s 6 -o stratum+ tcp://dogepool.pw : 3333 - O user.worker: password User. Worker is the Miner you registered in step 5, and password is your password. Save the above text as miner.bat file
start mining. Double click to run the miner.bat file, and the running result is as shown in the figure below, which indicates that you have succeeded. Now enjoy your dog money mining.

2. Go is an open source programming language, which makes it easy to construct simple, reliable and efficient software. If you want to learn this programming language, you should first find a good tutorial. Brother Lian's go language + blockchain training has recently published a new set of go language tutorial, and the teacher's speaking is very good

with the global hot discussion of the concept of "blockchain", the application of blockchain technology has been quietly added to the daily life scenes such as finance, logistics, credit reference, manufacturing and retail. Some experts have shown that the future blockchain will be closely related to people's lives, and the integration of blockchain technology and people's daily life is the general trend

the popularity of the blockchain market has triggered a large number of talents demand based on blockchain technical personnel, and the popularity of blockchain talents is rising at the speed of light. According to the "2018 blockchain high salary list" released by lagou.com, Tencent, Xiaomi, Suning, Jingdong and other domestic enterprise giants have released many high salary blockchain post demands, trying to explore blockchain related technologies and applications. It is also pointed out in the list that the demand for high salary jobs is mainly based on blockchain related technical jobs, among which Suning and Keda have been given the highest monthly salary of 100k

the huge market demand for technical talents will inevitably lead to the explosive emergence and growth of the whole blockchain training market. Most of the training modes can be divided into online training, traditional IT organization training, and offline short-term training camps, which mainly focus on high-end forms. However, in the process of the hot market evolution, there are also a variety of blockchain training chaos: lecturers' qualifications are watered down, and even the most basic names are not disclosed, the syllabus is opaque, and the teaching quality is shrinking, Unreasonable class arrangement and uneven training fees and so on

with the large-scale development of the whole blockchain training market, brother company ecation, together with Yin Cheng, a senior blockchain expert, and his Tsinghua Shuimu Weiming team, has set up a blockchain college. With its professional and powerful team of technical lecturers, detailed and comprehensive curriculum system, and a large number of authentic enterprise blockchain projects, it aims to deepen the blockchain teaching and training field, And train more professional technical talents for enterprises and society<

Yin Cheng, a senior blockchain technology expert, graated from Tsinghua University, is the dean of brother Lian blockchain college. He once served as Google Algorithm Engineer, the world's most valuable expert in the field of Microsoft blockchain, and the gold medal lecturer of Microsoft tech.ed conference. Proficient in C / C + +, python, go language, sicikit learn and tensorflow. With 15 years of programming experience and 5 years of teaching experience, senior software architect, Intel Software Technology expert, famous technology expert, with many years of working experience in the world's top it company Microsoft Google. He has many years of experience in software programming and lecturing, and has developed many procts in human-computer interaction, ecation, information security, advertising and blockchain system. He has deep experience in project management and R & D, has two AI invention patents, and has practical experience in developing e-money deployed to Microsoft Windows azure. Teaching explanation is in simple language, so that students can apply what they have learned
the first stage: blockchain instry and go programming for 5 weeks
the second stage: cryptography and consensus algorithm for 2 weeks
the third stage: Ethereum source code analysis and development for 3 weeks
the fourth stage: Super ledger and node.js for 2 weeks
the fifth stage: bitcoin & EOS for 4 weeks
the sixth stage: comprehensive actual combat of the project

3. At the top of Ethereum is DAPP. It exchanges with the smart contract layer through Web3. JS. All smart contracts run on EVM (Ethereum virtual machine) and use RPC calls. Below EVM and RPC are the four core contents of Ethereum, including: blockchain, consensus algorithm, mining and network layer. Except DAPP, all other parts are in the Ethereum client. The most popular Ethereum client is geth (go Ethereum)

4.

Suppose you understand the blockchain. To put it simply, the blockchain generates a new block every ten minutes to store all the transaction information in the blockchain. This block is equivalent to a network account book, which correctly time stamps all the transactions of the whole network in the past ten minutes. The question is who will build it? The "miner" on the blockchain is to compete for the bookkeeping right of a block in the past ten minutes. The rule of competition is to solve the sha256 problem while correctly bookkeeping. Who can prove that his computer has the fastest computing power can compete for the legal bookkeeping right of the block in the past ten minutes. This is the "mining" process. In the bitcoin blockchain, miners who dig mines can get certain bitcoin rewards. Therefore, miner's more essential function is "bookkeeper"

in his bitcoin white paper, Nakamoto describes in detail the process of establishing the credit system:

Step 1: in order to make the whole network recognize effective, every transaction must be broadcast to each node (node: miner)

Step 2: each miner node should correctly stamp each transaction in the ten minutes and record it in that block

Step 3: each miner node should compete for the legal bookkeeping right of this 10 minute block by solving the sha256 problem, and strive for the reward of 25 bitcoins (50 bitcoins every 10 minutes in the first four years, decreasing by half every four years)

Step 4: if a miner node solves the ten minute sha256 problem, TA will publish all the time stamped transactions recorded in the ten minute block of TA to the whole network, which will be checked by other miner nodes in the whole network

Step 5: other miners in the whole network check the correctness of the block's accounting (because they are also stamping the time stamp for accounting, but they do not compete for the legal block's accounting right, so there is no reward). If there is no error, they will compete for the next block after the legal block, thus forming a single block chain of legal accounting, That is the general ledger of bitcoin payment system - blockchain

generally speaking, each transaction must go through six block confirmations, that is, six ten minute bookkeeping, before it can be recognized as a legal transaction on the blockchain. The following is the accounting format of bitcoin:

so the so-called "bitcoin" is such a billing system: it includes the owner using the private key to make an electronic signature and pay to the next owner, and then the "miners" of the whole network stamp the account to form a blockchain Network)

if you want to learn more about blockchain information, it is recommended that you use Baijia, mustard circle and other popular B circle media. The amount and richness of information are more and better than those on the general network. If you want to ask technical questions, you can take a look at the links below, hoping to help you with the

Web links

5. It's not worth a dime. There's no difference between making virtual currency and burning money at this time

6. There are many languages for background development, and most of them have frameworks now. The so-called mastery of the framework is the proficiency of the business. It's not that you develop your own framework. It's useless. If the salary is lower, the work is faster, the work is more stable, the bug is less, and the overtime is OK. The company likes such employees best. It's not bad for you to be proficient, but it takes time and energy. The company is practical. You've done a lot, but the efficiency is not so good. It's not worth the loss. The most important thing to work is to make money. As a developer, the most important thing is efficiency, not anything else. Even if you can't program at all, but you use the framework to use the leverage, OK, understand
on the other hand, many people will definitely think that the most basic programming, the bottom of the things or someone to do. As a matter of fact, our social division of labor has made this part of the work done by more professional personnel. Basic things are generally sponsored and developed with great financial resources. The development of these things has great risks, great investment, great returns, but also great risks. Most companies don't do it on their own. Moreover, in this field, in order to pursue the ultimate efficiency, a lot of logic has been incorporated into machine learning and more complex algorithms. A simple indivial can not complete such a large project
back end development is actually a business application. You need to understand the business, make the business concrete, and use the tools in your hand to assemble the tools that can solve the problems. You are not a tire maker or a car maker. You are a driver. What you need to know is that you are going to a strange place where the machine can't recognize, only you can know the way. So, you're not dealing with machines, you're dealing with people.

7. In order to meet the rapid growth of Google's data processing needs, Google has designed and implemented the Google File System (GFS). GFS has many of the same goals as distributed file systems in the past, such as performance, scalability, reliability, and availability. However, its design is also influenced by Google's application load and technology environment. It is mainly reflected in the following four aspects:

1. Node failure in a cluster is a normal rather than an exception. Due to the huge number of nodes involved in the operation and processing, thousands of nodes are usually used for common calculation, so there are always nodes in failure state at any time. It is necessary to monitor the dynamic operation of the system, detect errors, and integrate fault tolerance and automatic recovery system into the system through software program mole

2. The concept of file size in Google system is different from that in common file system. File size is usually measured in G bytes. In addition, the meaning of files in the file system is different from that of common files. A large file may contain a large number of small files in the common sense. Therefore, design expectations and parameters, such as I / O operation and block size, need to be reconsidered

3. The file read-write mode in Google file system is different from that in traditional file system. In Google Applications (such as search), the modification of most files does not cover the original data, but adds new data at the end of the file. Random writing to files is almost nonexistent. For the access mode of such huge files, the client loses the significance of data block cache, and the append operation becomes performance optimization and atomicity (a transaction is regarded as a program). It is either fully implemented or not implemented at all

4. Some specific operations of the file system are no longer transparent and need the assistance of the application program. The collaborative design of the application program and the file system API improves the flexibility of the whole system. For example, the requirement of GFS consistency model is relaxed, so that the design of file system is greatly simplified without increasing the burden of application. Atomic appending operation is also introced, so that when multiple clients are appending at the same time, there is no need for additional synchronization operation

in short, GFS is designed for the Google App itself. It is said that Google has deployed many GFS clusters. Some clusters have more than 1000 storage nodes and more than 300t of hard disk space, which are frequently accessed by hundreds of clients on different machines.