Configuration of Ethereum

1.

Miner components include CPU, GPU, motherboard and hard disk, similar to a high configuration computer with a hard disk. Self assembly mainly depends on which aspect of hardware performance you want to highlight

mining machine has computing power, display card mining machine and storage mining machine. Daotong storage has long been concerned about the dynamic and hardware supply of mining machine, and its own components will be cheaper than those of the manufacturer< br />

2.

Hello, according to my experience, 1. First set up the rack, then fix the graphics card, and then plug the CPU and fan, memory, SSD hard disk into the slot of the motherboard, and connect the power supply and motherboard power supply

I hope my suggestions can help you, thank you

3. It depends on what brand of 7W Ethereum mining chassis is used. Some of them are very low. They soon get hot and crash. A better one, that is, McKenzie's, is a relatively good choice.

4.

1. Power consumption: 243w; Calculation force: 22.4m; Price: 1999 yuan; The number of eth g every 24 hours: 0.015; Revenue generated every 24 hours: 24.8 yuan; Expected payback time: 81.66 days

2. Power consumption of the whole machine: 159w; Calculation force: 24.3m; Price: 1599 yuan; Number of eth g every 24 hours: 0.017; Revenue generated every 24 hours: 27.9 yuan; Expected payback time: 57.31 days

3. Power consumption: 171w; Calculation force: 24.4m; Revenue generated every 24 hours: 27.87 yuan; Expected payback time: 71.73 days

4. Power consumption: 97W; Calculation force: 9.2; Price: 999 yuan; Number of eth g every 24 hours: 0.006; Revenue generated every 24 hours: 10.09 yuan; Expected payback time: 99.1 days

extended data

mining machine risk

1. The problem of electricity charge

in order to make the graphics card full load for a long time, the power consumption will be quite high, and the electricity charge will be higher and higher. Many professional mines at home and abroad are operated in areas with extremely low electricity charges, such as hydropower stations, while more users can only mine at home or in ordinary mines, so the electricity charges are not cheap. Even in a certain residential area in Yunnan, there was a case of crazy mining, which led to a large area trip of the residential area, and the transformer was burned

2. Hardware expenditure

mining is actually a competition of performance and equipment. Some mining machines are composed of more such graphics card arrays. With dozens or even hundreds of graphics cards, the cost of hardware and other costs is very high, and there is a considerable expenditure in mining

3, currency security

the withdrawal of bitcoin requires hundreds of keys, and most people will record this long string of numbers on the computer, but the frequent problems such as hard disk damage will make the key permanently lost, which also leads to the loss of bitcoin

5. According to the requirements of the manual, first measure whether the red and green lines correspond to the L1 of the interface; Is the yellow and black line corresponding to L2? If so, it must be the correct connection. Although the telephone line can be divided into positive and negative poles, the terminals can be connected at will, so there is a rectifier directional circuit inside the telephone. Even if the L1 and L2 lines are wrongly connected, the equipment will not be burnt out, so you can safely and boldly test.

6. The core component is the graphics card, which accounts for about 80% of the cost, followed by the motherboard and power supply

7. Fuzhou Strait International Convention and Exhibition Center is located in the exhibition island of Cangshan District, Fuzhou City (also known as "Puxiazhou"), adjacent to Minjiang River in the north and Fuzhou South Railway Station in the south, and adjacent to Linpu bridge and Gushan bridge, two important river crossing channels of Fuzhou City in the East and West< Generally, there are 14 bus routes leading to Fuzhou Strait International Convention and Exhibition Center in the urban area, which are as follows:
1, 4, 8, 17, 28, 42, 85, 101, 103, 113, 301 307 bus line is temporarily extended to the urban area of the Strait Convention and Exhibition Center and the bus line to the Convention and Exhibition Center

(1) No.1 Road (Ximen huting), main stops:
Ximen, Xihu, Gulou, Nanjie (Dayang department store), Nanmen (Fuzhou children's Hospital), chating (First Affiliated Hospital), Cultural Palace (Dongfang department store), Taijiang, Taijiang pedestrian Street, Qiaonan (Fuzhou second hospital), Huida square, Sansan street, Sansan street new village, Sansheng instry, huting Fuzhou Strait International Convention and Exhibition Center West Station< (2) No.4 Road (west gate of Zuohai Park Fengquan environmental protection group), main stops:
west gate of Zuohai Park, general hospital, Wanshang club, liming, high school affiliated to Municipal Ecation College, Vientiane City, Baolong city square, Huaqiao middle school, NO.4 middle school, Normal University, shangsanlu, Sansan street, Sansheng instry, huting, Houban, bus overhaul plant, Fengquan environmental protection group Fuzhou Strait International Convention and Exhibition Center East Station< (3) route 8 (Software Park huting Fuzhou Strait International Convention and Exhibition Center), main stops:
Software Park, software park gate, provincial military region, Tongpan, Zuohai Park, sanjiaojing, Pingshan, Department of Health (provincial hospital), Gulou, South Street (Dayang department store), shan intersection, Yushan (Union Hospital), zhuangyuanjing, bus station, South Park Xiangyuantou, Changle Road, Lianpan, Guangming Bridge, longfu electromechanical trading market, Huawei passenger station, Sansan street, Sansheng instry, huting, Fuzhou Strait International Convention and Exhibition Center East Station, etc< (4) No.17 Road (residential theme park - huting), main stops:
residential theme park, Fengdan egret City, Xindian town government, Provincial Sports Center, No.2 Power Construction Company, Doumen, Hucheng, Yangxia new village, Dongmen, Fuxin intersection, Wangzhuang, Qiaobei, Qiaonan (Fuzhou second hospital), Huida square, Sansan street, Sansan street new village, Sansheng instry, huting Fuzhou Strait International Convention and Exhibition Center West Station
(5) No.28 (Kangcheng community huting), main stops:
Kangcheng community, Xindian, Fucun, Qinting viact, Xiyuan, railway station, minyun north bus station, railway hospital, Erhua, wanshili garden, Fuxin East Road, Jinhui new village, shuangban, Guangming Bridge, longfu electromechanical Trading market, Gaohu village, huting Fuzhou Strait International Convention and Exhibition Center West Station
(6) No.42 (Jinshan Jinju Station - huting), main stops:
Jinshan Jinju station, Jinshan phase IV, Binzhou Road North, Jinxiang intersection, Jinshan bus terminus, Rongcheng square, Jianxin, hengjiang, Gangtou, Ban, Shang (forest procts market), Normal University, shangsanlu intersection, Sansan street, Sansheng instry, huting Fuzhou Strait International Convention and Exhibition Center West Station
(7) No.85 Road (agriculture and Forestry University (apitherapy hospital) - huting), main stops:
agriculture and Forestry University (apitherapy hospital), provincial instrial school, provincial building materials school, guocuoli, MaRong new village (nanjiangbin Park), Jianxin, hengjiang, Gangtou, Ban, Shang (forest procts market), Cangqian, Qiaonan (Fuzhou second hospital), Huida square, SANFA street Sansanjie Xincun, Sansheng instry, huting, Fuzhou Strait International Convention and Exhibition Center West Station, etc
(8) 101 Road (Meiting army huting), main stops:
Meiting army, Meiting, Baofu, Meifeng Road, sanjiaojing, Pingshan, Gulou, South Street (Dayang department store), Yushan (Union Hospital), bus station (instry and Trade Center), South Park, Qiaobei, Qiaonan (Fuzhou second hospital), Huida square, Sansan street, Sansan street new village, Sansheng instry Baihuting, Fuzhou Strait International Convention and Exhibition Center West Station, etc
(9) No.103 (bus Rende station huting), main stops:
bus Rende station, Wuyi Square, Gutian Road, Ziyang, Daming City, shuangban, Guangming Bridge, longfu electromechanical trading market, Gaohu village, huting, Fuzhou Strait International Convention and Exhibition Center West Station, etc
(10) No.113 (liangcuo road - huting), main stops:
liangcuo Road, Hongshan railway station, Hongshan Bridge, Longfeng new village, Fenghuang lake, Fuda east gate, Xichen temple, Minjiang University, Baolong city square, Pudong, Fusi middle school, Normal University, shangsankou, Sancha Street, Sansheng instry, huting, Fuzhou Strait International Convention and Exhibition Center West Station, etc
(11) No.136 (bus Rende Station - Fuzhou Strait International Convention and Exhibition Center West Station), main stops:
bus Rende station, yangtoukou, provincial people's Hospital, Cultural Palace (Dongfang department store Qunsheng store), Zhongting street, Taijiang cinema, Taijiang pedestrian street, paiwei, Yafeng, provincial transportation technology school, Aofeng bridge, Wanda Plaza of Financial Street, Yuchi, Linpu Road, etc Fuzhou Strait International Convention and Exhibition Center (Puxia), Fuzhou Strait International Convention and Exhibition Center West Station, etc
(12) 301 Road (west gate of Zuohai Park huting), main stops:
west gate of Zuohai Park, general hospital, Yangnan intersection, Gaofeng bridge, real estate market, shuangpaoqiao, Dongjiekou, provincial hospital, mengmengying, Longhua overpass, Zhengda square, zhuangyuanjing, bus station, South Park, Yanta, Qiaobei, Qiaonan, Cangshan pedestrian street, Huawei passenger station Gaishan town government village, Zexu square, huting, Fuzhou Strait International Convention and Exhibition Center East Station, etc
(13) 307 Road (Fuzhou Strait International Convention and Exhibition Center East Station Fuda East Gate), main stops:
Fuzhou Strait International Convention and Exhibition Center East Station, Fuzhou Strait International Convention and Exhibition Center (Puxia), longzhouhe, cangshanpuxia, Jiangbiancun, guozhou, mein, Changpu, fanchuanpu church, Qiaonan, shangsanlukou, chengputou, Fusizhong, nanchanshan Overseas Chinese middle school (Hongqi Village), Pudong, Baimahe, Douchi, Wushan West Road, Xichen temple, Fuda east gate, etc< (14) 501 Road (Fuzhou Strait International Convention and Exhibition Center West Station - Finance College), main stops:
Fuzhou Strait International Convention and Exhibition Center West Station, huluzhen, bus overhaul plant, Houban, Zexu square, shangsankou, Fuzhou technical school, Cangshan Town, Provincial Transportation College, Fujian Police College, Shoushan, finance college, etc
there are various public buildings and cultural and entertainment facilities around the exhibition center. The surrounding road network is developed. It is adjacent to Minjiang River in the north and Fuzhou South Railway Station in the south. The east end of nanjiangbin Avenue passes through the island. Gushan bridge and Kuiqi bridge cross the Minjiang River in the upstream and downstream of the exhibition island. Pann road and Linpu Road, together with Fuxia Road and expressway connecting line, constitute the traffic network extending in all directions of the exhibition island.

8. In short, this is the function of the central bank
new currencies are usually solved through open market operations. In other words, the central bank makes its own money flow out by buying Treasury bonds (issued by the Ministry of Finance), so that the money flows to commercial banks, and commercial banks make money circulate in the society through lending
first of all, understand currency: today's commonly referred to as currency is the paper money in our pocket. It is a medium and tool to facilitate the exchange and circulation of goods under the commodity economy. It has no value in itself and is issued and forced to circulate by the national bank. When you go shopping in China with us dollars, the shop owner will treat us dollars as a piece of waste paper, because US dollars must be converted into RMB through the central bank to be used in China
currencies of different countries cannot be circulated in different countries. Now, with the global economic integration, there are certain economic exchanges between countries. In order to solve the trade and currency problems between different countries, two concepts of foreign exchange and foreign exchange reserve are involved
as we all know, a country's wealth is not measured by the amount of its currency issued or owned, but by the amount of its commodities, which are the material needs of people's life, rather than money, that is, a country's proction capacity and gross domestic proct
trade between countries can be divided into export and import as follows:
in the case of export, if US dollar is used as foreign currency, that is to say, Chinese multinational enterprises sell their procts in the United States in exchange for the currency of other countries. For Chinese people, foreign currency is not allowed to circulate in the Chinese market, Therefore, in the Chinese market, foreign currency is equivalent to a pile of waste paper. Therefore, it is useless for Chinese export enterprises to sell foreign currency to the national bank to exchange it for RMB, and the state holds foreign currency. People's wealth is ultimately reflected in their material enjoyment, and money is only an intermediary and tool for material exchange, Our domestic enterprises give the goods they proce to the United States, while the United States only gives us foreign currency (bonds), thus forming a debt relationship: that is, China is the creditor, foreign countries (the United States) are the debtor, and foreign exchange (US dollars) is the debt relationship certificate

for the import situation, foreign currency reserves will not be affected. For example, if foreign businessmen sell foreign goods at home to earn RMB, the central bank will take the foreign exchange reserves (US dollars) to buy back RMB from foreign investors (because this part of RMB is circulating at home and is not counted as foreign exchange reserves), It may also be that foreign businessmen take RMB to their own country to exchange for their own currency, which also forms their own foreign exchange reserves (whether the actual process is like the above, I don't know, it's not studying economy, it's just speculation). Buy back is actually a hedging process (the real sense of hedging seems to be that the central bank takes foreign exchange to buy overseas). It can also be understood as follows: foreign goods are regarded as the goods proced by the central bank and sold in the domestic market. In this way, part of the foreign exchange reserve is returned to the people through the central bank, and the debt is also paid

generally, the amount of money in circulation of a country corresponds to the amount of goods proced by the country Material wealth corresponds to the amount of money)
Chinese enterprises export goods, which can be seen as: China proces too many domestic goods (that is, the corresponding currency is not enough),
domestic enterprises get foreign markets for commodity sales and exchange through the form of export, and can exchange domestic goods for foreign goods, but because of the existence of foreign currency, In fact, these foreign currencies are equivalent to the debts of foreign consumers to China's export enterprises, and these debts are uniformly assigned to the name of the national bank. This has become the country's foreign exchange reserves. The more foreign exchange reserves, the more money the state will lend. Lending is equivalent to issuing money. If a country releases too much money, it needs to issue a large amount of money, which may cause inflation (there are not enough goods, but a lot of currency in circulation). At this time, the country purchases goods from overseas through the international market, and consumes foreign goods in exchange for goods, so as to achieve the goal of stabilizing and balancing the economy. It can also be understood from another perspective that the central bank releases a large amount of money to exchange for foreign exchange reserves. The increase of this kind of money is not caused by the "invisible hand" of the market rules, but by the Central Bank of the government. If we zoom in, the increase of money will actually be inflation, and the money on the hands of the people will be devalued, The devalued part is occupied by the central bank free of charge. Therefore, it can be understood as: foreign exchange reserves are liabilities of the central bank, not assets, because it is exchanged by the central bank from the people's hands with RMB, then the people will want to cash this asset one day
as China's foreign exchange currency is mainly US dollar, once the US economy fluctuates and leads to the depreciation of US dollar, China's foreign exchange reserves will have the risk of devaluation. The devaluation of foreign exchange reserves is also the loss of China's assets< In a word, foreign exchange reserve is a kind of debt relationship between the people and other countries (reserves are not national assets, but the money of the working people), and the people, as one of the creditor's rights, transfer the creditor's rights to the National Central Bank and hang them in the name of the central bank

foreign exchange reserve refers to the foreign convertible currency held by a country's monetary authority and can be used for external payment, which acts as an international reserve asset. The amount of foreign exchange reserve mainly depends on the status of import and export, the scale of foreign debt and the actual use of foreign capital. Foreign exchange reserves are used for trade with other countries
in order to increase foreign exchange, we need to issue RMB to buy, and the supply of RMB will increase, which may cause monetary expansion in the domestic market. A certain amount of foreign exchange reserve is an important means for a country to adjust its economy and realize the economic balance at home and abroad. When there is a deficit in the balance of payments (more imports, the domestic market full of foreign goods, causing domestic monetary tightening), the use of foreign exchange reserves can promote the balance of payments; When the domestic macro-economy is unbalanced and the total demand is greater than the total supply (the consumption demand increases and the goods are not enough), we can use foreign exchange to organize imports, so as to adjust the relationship between the total supply and the total demand and promote the macro-economy balance
at the same time, when the exchange rate fluctuates, we can use the foreign exchange reserves to intervene the exchange rate and make it stable
the performance of foreign exchange reserves is to hold a kind of financial claims expressed in foreign currency, not put into domestic proction. This leads to the problem of opportunity cost, that is, if the monetary authorities do not hold reserves, they can use these reserve assets to import goods and services, increase the real resources of proction, and thus increase employment and national income, while holding reserves gives up such benefits
the increase of foreign exchange reserves should expand the money supply. If the foreign exchange reserves are too large, it will increase the pressure of inflation and increase the difficulty of monetary policy
holding too much foreign exchange reserves may also cause losses e to the depreciation of foreign exchange rate
because foreign currency can not circulate in the domestic market, the central bank not only releases a certain amount of money (through export and foreign capital) in China, but also reserves a certain amount of foreign exchange on behalf of the country. At this time, RMB is used in China, while foreign exchange itself is independent of the domestic economic operation, and is used by the central bank to maintain and increase value in the international financial market.

9. VMnet1 is the internal network
VMnet8 is NAT

when the terminal is running,
? Dhclient
can get IP
or
? Dhclient eth0
let eth0 get IP

10. Huawei's ar series routers don't support layer-3 interface switching layer-2 interface, and S series switches don't support layer-2 interface switching layer-3 interface. So when you do a function, you should first read the proct manual clearly. Routing and switching technology is different from programming. It's not like writing a line of code to see the effect of a line of code. Routing and switching technology requires you to learn the theory clearly, To do configuration again is like a fish in water, otherwise it is called layman.