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      "author": "steemitboard",
      "body": "Congratulations @hashcoins! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@hashcoins/birthday3.png</td><td>Happy Birthday! - You are on the Steem blockchain for 3 years!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@hashcoins) and compare to others on the [Steem Ranking](https://steemitboard.com/ranking/index.php?name=hashcoins)_</sub>\n\n\n###### [Vote for @Steemitboard as a witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1) to get one more award and increased upvotes!",
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      "body": "<p><strong>Strictly speaking, we just provided our moral and financial support to it. The members of the expedition, held this year from February 26 to March 8, were journalists of the “Govorit i Pokazyvaet” production studio and BitNovosti web-site, who paid all their travel expenses only with cryptocurrency.
</strong></p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/472/ae9/8d6/472ae98d6580ef67f389022919510bf4.jpg\" /></p>\n<p>The tour started and finished in Moscow, and the team drove through Lithuania, Germany, Netherlands, Czech Republic, Austria, Slovakia, Poland, and Belarus. The farthermost point of the tour was the capital of Netherlands, Amsterdam. The goal of this project was to capture the current state of development of the Bitcoin infrastructure and to make a presentation at the Bitcoin Wednesday conference in Amsterdam. After that, we planned to create a new documentary film based on the travel observations of the team.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/f91/a89/c87/f91a89c877eca1d85927faf8253ec36d.jpg\" /></p>\n<p>Just to remind you that at the end of the last year the first Russian documentary “Cryptocurrency: The Gold of the Digital Age” was shown. The film was created by the “Govorit i Pokazyvaet” production studio with the support of the <a href=\"https://hashflare.io\" rel=\"noopener\">HashFlare </a>cloud mining service. And the presentation of the authors of this film at the conference in Amsterdam was dedicated right to the first run of this film.

</p>\n<p>It is not a new idea to travel paying in bitcoins. For example, Felix Weiss has already visited more than 22 countries, only paying in cryptocurrency everywhere. But the European experiment of the film crew and the journalists was also the first of its kind since the events of the tour were meant to be put to the basis of a new film, and the people involved in the world of cryptocurrency who were met by the film crew on their way became the central characters of the film.

</p>\n<p>If we were a bit more fortunate, we could even boast that they drank from such mugs all way long:

</p>\n<p><img src=\"https://habrastorage.org/files/794/3e8/9ef/7943e89efcb448098bce8661fe5e16d2.jpg\" /></p>\n<p>But fate was against it. We were preparing our souvenir items on a very tight schedule because (as it always happens) we got started doing it at the very last moment. We spent a lot of time working with our designer until we found the solution which we were satisfied with. Then we got the print office to print everything for us within one day, and shipped a parcel with mugs, flash drives and T-shirts. But at the last second, it was detained by the customs and failed to be delivered to BitNovosti before the start of the tour. So, the expedition team started their travel having no chance to get the parcel on their way. And now we are waiting for a questionably long time when the parcel will be delivered back to us. We still haven’t received it back, though the expedition has already returned from their European tour. That’s why we can only see our mugs the way you do - on the picture :'-(

</p>\n<h1>Travel Observations</h1>\n<p>
We have contacted Alexander Bezzubtsev, the producer of the “Govorit i Pokazyvaet” production studio, who directly took part in the organization and realization of the Bitcoin Tour, and interviewed him on his feelings and the lessons learned. </p>\n<p>
After long preparations, a minivan stuffed with equipment and Bitcoin explorers hit the road to Belarus and Lithuania. In Minsk, the Bitcoin team was lucky to meet with the founder and CEO of SoftSwiss (www.softswiss.com) Ivan Montik. His company created the world’s first platform for Bitcoin casinos and brought classic games (slots, roulettes, cards) to the world of Bitcoin.

</p>\n<p>Searching for variants of accomodation in Belarus, the journalists and members of the film crew succeeded to find only one advertisement the author of which dared to lease the apartment for bitcoins. Except for a number of Bitcoin companies, including SoftSwiss which works for a foreign market, there is practically no Bitcoin movement in the country, and shortly the film crew moved towards the Belarusian-Lithuanian border.

</p>\n<p>As the members of the Bitcoin expedition told us later, Lithuanian border guards met them with great suspicion as the law requires everyone who enters the EU to have at least 40 Euro in cash per each day of stay, and border guards found the arguments of the journalists that they have e-wallets with bicoins in their pockets quite weak. After a long wait, our team was escorted for interrogation to the watch commander who thoroughly listened about the purpose of their journey, Bitcoin and Bitcoin Wednesday in Amsterdam for half an hour and was finally convinced by the arguments.

</p>\n<p>Unlike Belarus, in Lithuania Bitcoin is not a novelty, people know and talk about it. Staff members of some venues, whom the participants of the Bitcoin expedition met, were aware of the possibility to accept payment in cryptocurrency and, in theory, they were ready to make such transaction.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/bd4/f30/82e/bd4f3082e5c1929c0e519347ceb2ca2e.jpg\" /></p>\n<p>As it turned out, the owner of the cozy youth hostel was ready to accept even Litecoin. As the members of the expedition noticed, all venues which accepted bitcoins were especially creative. The Bitcoin travelers used the map of Bitcoin accepting venues for planning of their trip and land navigation, and according to their impressions this map is accurate for about 70%. In Vilnius, the Bitcoin team visited the barber shop Barzdaskuciai, owner of which likes Bitcoin. So, if you want to shave your beard and pay for it in cryptocurrency, nobody will be surprised there.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/bf1/b56/ca7/bf1b56ca70b8111aafc9600fc267fbfc.jpg\" /></p>\n<p>The next country of the Bitcoin tour was Germany. The first stop of the Bitcoin team in Germany was Hannover, where they met with Ricardo Ferret Rivero, the founder of the Pey company, which creates Bitcoin payment terminals and distributes them among city shops and cafes. This year, Pey is planning to launch more than 150 terminals around Hannover. And the participants of this trip informed us that now in Hannover you can quite often see the stickers “Bitcoin is accepted here” in hairdresser’s saloons, cafes and small shops.

</p>\n<p>Then the Bitcoin expedition moved to Berlin, where they visited the fabulous burger shop Room 77 which hosts the meetings of the Bitcoin community from all over the world. 
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/62d/2ac/89d/62d2ac89dffce2a521e336a4cb58888b.jpg\" /></p>\n<p>By the way, the wifi password in this shop is Allyourcoinsisbelongtous!.. It is a place of meeting for people who cannot imagine their life without Bitcoin. And it is the only place in Berlin which intentionally does not accept plastic cards. The hostess of this shop says that there is no need to monitor the Bitcoin exchange rate to be informed about the status of Bitcoin. All she needs is to look at the activity of visitors of her shop. 
</p>\n<p>In Prague, the participants of the expedition visited the Paralelní Polis Bitcoin venue where, among other things, they saw a real Bitcoin cashpoint and met with Bitcoin cyborgs, geeks who implanted NFC-tags under their skin and now they can pay simply by bringing their hand to the caspoint in this cafe.

</p>\n<p>The farthermost point of the tour was Amsterdam. As it turned out, in Amsterdam, there are no Bitcoin cash machines anymore. They all disappeared in unclear circumstances within one week-end. It happened four months ago. Almost all attempts to pay in bitcoins in coffeeshops, souvenir shops and grocery stores were unsuccessful: everyone knows about Bitcoin there but only few accept it. But the Bitcoin expedition did not waste their time. In Amsterdam, they visited the Bitcoin Embassy established by Marek Skachinski and made a successful presentation at the Bitcoin Wednesday conference.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/180/a1f/ccf/180a1fccf10b53323fe1cf9d034c897d.jpg\" /></p>\n<p>According to Bezzubtsev, the participants of the Bitcoin expedition came to a conclusion: a trip around Europe for bitcoins is a feasible but yet not an easy task. Besides, so far it is impossible to go completely without fiats.
</p>\n<blockquote>On the whole, we were a bit disappointed with the current Bitcoin infrastructure in Europe. We thought it is more well-developed. As we understood, all marks on online maps just show the willing of those venues to use Bitcoin which appeared on the crest of the fashion wave a couple of years ago. People just began to take Bitcoin more serious. It went toward smart technologies rather than just common payment means, but it will come back to the retail trade when the infrastructure will be developed.</blockquote>\n<p>Currently, practical use of blockchain without intermediaries remains an exotic thing, highly localized and specific, which, however, does not make any obstacles for its further development and perspectives.

</p>\n<p>These days, we are finishing the production of the first two web-format series about our Bitcoin tour, and the release of further parts is scheduled for the next month. 
</p>\n<blockquote>“We did a fundamental work. We studied the current status of Bitcoin in different countries. Usually, people write or tell something about certain aspects of it, and we have traced the system. And now, after a series of road movies, we’ve got an idea to create one more serious documentary,“ said the producer Alexander Bezzubtsev.</blockquote>\n<p><br /></p>\n<p><img src=\"https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\" /></p>\n<p><br /></p>",
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{
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      "author": "daysaiyan",
      "body": "Keep up the great work @hashcoins \n Upvoted ",
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{
  "block": 3783888,
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      "author": "hashcoins",
      "body": "<p><strong>Strictly speaking, we just provided our moral and financial support to it. The members of the expedition, held this year from February 26 to March 8, were journalists of the “Govorit i Pokazyvaet” production studio and BitNovosti web-site, who paid all their travel expenses only with cryptocurrency.
</strong></p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/472/ae9/8d6/472ae98d6580ef67f389022919510bf4.jpg\" /></p>\n<p>The tour started and finished in Moscow, and the team drove through Lithuania, Germany, Netherlands, Czech Republic, Austria, Slovakia, Poland, and Belarus. The farthermost point of the tour was the capital of Netherlands, Amsterdam. The goal of this project was to capture the current state of development of the Bitcoin infrastructure and to make a presentation at the Bitcoin Wednesday conference in Amsterdam. After that, we planned to create a new documentary film based on the travel observations of the team.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/f91/a89/c87/f91a89c877eca1d85927faf8253ec36d.jpg\" /></p>\n<p>Just to remind you that at the end of the last year the first Russian documentary “Cryptocurrency: The Gold of the Digital Age” was shown. The film was created by the “Govorit i Pokazyvaet” production studio with the support of the <a href=\"https://hashflare.io\" rel=\"noopener\">HashFlare </a>cloud mining service. And the presentation of the authors of this film at the conference in Amsterdam was dedicated right to the first run of this film.

</p>\n<p>It is not a new idea to travel paying in bitcoins. For example, Felix Weiss has already visited more than 22 countries, only paying in cryptocurrency everywhere. But the European experiment of the film crew and the journalists was also the first of its kind since the events of the tour were meant to be put to the basis of a new film, and the people involved in the world of cryptocurrency who were met by the film crew on their way became the central characters of the film.

</p>\n<p>If we were a bit more fortunate, we could even boast that they drank from such mugs all way long:

</p>\n<p><img src=\"https://habrastorage.org/files/794/3e8/9ef/7943e89efcb448098bce8661fe5e16d2.jpg\" /></p>\n<p>But fate was against it. We were preparing our souvenir items on a very tight schedule because (as it always happens) we got started doing it at the very last moment. We spent a lot of time working with our designer until we found the solution which we were satisfied with. Then we got the print office to print everything for us within one day, and shipped a parcel with mugs, flash drives and T-shirts. But at the last second, it was detained by the customs and failed to be delivered to BitNovosti before the start of the tour. So, the expedition team started their travel having no chance to get the parcel on their way. And now we are waiting for a questionably long time when the parcel will be delivered back to us. We still haven’t received it back, though the expedition has already returned from their European tour. That’s why we can only see our mugs the way you do - on the picture :'-(

</p>\n<h1>Travel Observations</h1>\n<p>
We have contacted Alexander Bezzubtsev, the producer of the “Govorit i Pokazyvaet” production studio, who directly took part in the organization and realization of the Bitcoin Tour, and interviewed him on his feelings and the lessons learned. </p>\n<p>
After long preparations, a minivan stuffed with equipment and Bitcoin explorers hit the road to Belarus and Lithuania. In Minsk, the Bitcoin team was lucky to meet with the founder and CEO of SoftSwiss (www.softswiss.com) Ivan Montik. His company created the world’s first platform for Bitcoin casinos and brought classic games (slots, roulettes, cards) to the world of Bitcoin.

</p>\n<p>Searching for variants of accomodation in Belarus, the journalists and members of the film crew succeeded to find only one advertisement the author of which dared to lease the apartment for bitcoins. Except for a number of Bitcoin companies, including SoftSwiss which works for a foreign market, there is practically no Bitcoin movement in the country, and shortly the film crew moved towards the Belarusian-Lithuanian border.

</p>\n<p>As the members of the Bitcoin expedition told us later, Lithuanian border guards met them with great suspicion as the law requires everyone who enters the EU to have at least 40 Euro in cash per each day of stay, and border guards found the arguments of the journalists that they have e-wallets with bicoins in their pockets quite weak. After a long wait, our team was escorted for interrogation to the watch commander who thoroughly listened about the purpose of their journey, Bitcoin and Bitcoin Wednesday in Amsterdam for half an hour and was finally convinced by the arguments.

</p>\n<p>Unlike Belarus, in Lithuania Bitcoin is not a novelty, people know and talk about it. Staff members of some venues, whom the participants of the Bitcoin expedition met, were aware of the possibility to accept payment in cryptocurrency and, in theory, they were ready to make such transaction.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/bd4/f30/82e/bd4f3082e5c1929c0e519347ceb2ca2e.jpg\" /></p>\n<p>As it turned out, the owner of the cozy youth hostel was ready to accept even Litecoin. As the members of the expedition noticed, all venues which accepted bitcoins were especially creative. The Bitcoin travelers used the map of Bitcoin accepting venues for planning of their trip and land navigation, and according to their impressions this map is accurate for about 70%. In Vilnius, the Bitcoin team visited the barber shop Barzdaskuciai, owner of which likes Bitcoin. So, if you want to shave your beard and pay for it in cryptocurrency, nobody will be surprised there.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/bf1/b56/ca7/bf1b56ca70b8111aafc9600fc267fbfc.jpg\" /></p>\n<p>The next country of the Bitcoin tour was Germany. The first stop of the Bitcoin team in Germany was Hannover, where they met with Ricardo Ferret Rivero, the founder of the Pey company, which creates Bitcoin payment terminals and distributes them among city shops and cafes. This year, Pey is planning to launch more than 150 terminals around Hannover. And the participants of this trip informed us that now in Hannover you can quite often see the stickers “Bitcoin is accepted here” in hairdresser’s saloons, cafes and small shops.

</p>\n<p>Then the Bitcoin expedition moved to Berlin, where they visited the fabulous burger shop Room 77 which hosts the meetings of the Bitcoin community from all over the world. 
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/62d/2ac/89d/62d2ac89dffce2a521e336a4cb58888b.jpg\" /></p>\n<p>By the way, the wifi password in this shop is Allyourcoinsisbelongtous!.. It is a place of meeting for people who cannot imagine their life without Bitcoin. And it is the only place in Berlin which intentionally does not accept plastic cards. The hostess of this shop says that there is no need to monitor the Bitcoin exchange rate to be informed about the status of Bitcoin. All she needs is to look at the activity of visitors of her shop. 
</p>\n<p>In Prague, the participants of the expedition visited the Paralelní Polis Bitcoin venue where, among other things, they saw a real Bitcoin cashpoint and met with Bitcoin cyborgs, geeks who implanted NFC-tags under their skin and now they can pay simply by bringing their hand to the caspoint in this cafe.

</p>\n<p>The farthermost point of the tour was Amsterdam. As it turned out, in Amsterdam, there are no Bitcoin cash machines anymore. They all disappeared in unclear circumstances within one week-end. It happened four months ago. Almost all attempts to pay in bitcoins in coffeeshops, souvenir shops and grocery stores were unsuccessful: everyone knows about Bitcoin there but only few accept it. But the Bitcoin expedition did not waste their time. In Amsterdam, they visited the Bitcoin Embassy established by Marek Skachinski and made a successful presentation at the Bitcoin Wednesday conference.
</p>\n<p><img src=\"https://habrastorage.org/getpro/geektimes/post_images/180/a1f/ccf/180a1fccf10b53323fe1cf9d034c897d.jpg\" /></p>\n<p>According to Bezzubtsev, the participants of the Bitcoin expedition came to a conclusion: a trip around Europe for bitcoins is a feasible but yet not an easy task. Besides, so far it is impossible to go completely without fiats.
</p>\n<blockquote>On the whole, we were a bit disappointed with the current Bitcoin infrastructure in Europe. We thought it is more well-developed. As we understood, all marks on online maps just show the willing of those venues to use Bitcoin which appeared on the crest of the fashion wave a couple of years ago. People just began to take Bitcoin more serious. It went toward smart technologies rather than just common payment means, but it will come back to the retail trade when the infrastructure will be developed.</blockquote>\n<p>Currently, practical use of blockchain without intermediaries remains an exotic thing, highly localized and specific, which, however, does not make any obstacles for its further development and perspectives.

</p>\n<p>These days, we are finishing the production of the first two web-format series about our Bitcoin tour, and the release of further parts is scheduled for the next month. 
</p>\n<blockquote>“We did a fundamental work. We studied the current status of Bitcoin in different countries. Usually, people write or tell something about certain aspects of it, and we have traced the system. And now, after a series of road movies, we’ve got an idea to create one more serious documentary,“ said the producer Alexander Bezzubtsev.</blockquote>\n<p><br /></p>\n<p><img src=\"https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\" /></p>\n<p><br /></p>",
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      "body": "<p><strong>They take me to the former factory building on the outskirts of Tallinn. Fortunately, I am not in the trunk, but they asked me to keep the destination a secret and not to take any photos of the exterior, so that the exact location remains hidden from the ill-intentioned individuals. It is surprising, but for some reason there are a lot of those who wish to find it. 
</strong></p>\n<p><img src=\"https://habrastorage.org/files/6b1/6b1/307/6b16b1307bee4ad191d2fd47bf1af0c8.jpg\" /></p>\n<p>It’s unlikely that there is a single person in the world who woke up one day with the thought “What if I build a personal data center today?”. Usually people come to such decisions through a chain of events and conditions. 

</p>\n<p>HashFlare made this decision as a result of a combination of factors, the very first and important one being the excitement for the new cryptocurrency. Ethereum boomed and reached capitalization of almost a billion US dollars within a little over a year. Of course, HashFlare customers also wanted to get an opportunity to mine this new cryptocurrency.</p>\n<p>

Ethereum is best mined on video cards. A lot has been written to explain the advantages of mining on video cards over mining on CPU. Unique features of some cryptocurrencies, Ethereum included, make CPU mining very impractical. For example, if the currency uses several encryption algorithms in a certain sequence, any change of the algorithm will result in a system failure. Ethereum uses a very complex algorithm, which makes it completely impossible to be mined on CPU, while GPU mining is possible for almost any currency. </p>\n<p>

However, it is not as simple as just putting a bunch of video cards into racks in a data center. The main complication here is cooling. Cases of modern servers are designed for the most effective cooling: with the air intake on one side and the air outlet on the other. Even ASIC miners have long since been available in standard cases mountable in server racks of data centers. Video card producers don’t bother with such functionality, as they could not foresee that an idea of developing whole GPU farms could ever be possible. It is impossible to mount video cards in an enclosed rack, as all of them are facing different directions, while, at the same, time if something goes wrong (failure of fans or other problems may arise), you have to be able to disconnect and remove the broken link. 
</p>\n<p><img src=\"https://habrastorage.org/files/5d9/4f5/def/5d94f5def2d44b02907feaa0e60b8de5.jpg\" /></p>\n<p><em>In such moments, you begin to appreciate the maintainability
</em></p>\n<p>Of course, video cards could be mounted in computer cases but it will increase the overall price greatly and affect their serviceability. This is a small-scale solution for only 1 or 2 video cards, which makes it ineffective for industrial use. </p>\n<p>Besides, administrators of data centers are not trained to work with video cards and have no desire to do it. 

So, we need a mining farm on video cards which is impossible to deploy in an ordinary data center. You already know the solution – build it yourself. And now we will talk about the ways to do it.</p>\n<p>

In early March, HashFlare announced the launch of Ethereum mining and started accepting pre-orders, which provided sufficient funds to build the first GPU mining farm for Ethereum, launched later in early April 2016.

</p>\n<p>For this farm the company rented out several large storage rooms within the building of a former Soviet factory on the outskirts of the Estonian capital. The temperature in the spacious and cool building rises dramatically as you approach the premise, where the magic of mining happens. It is so hot inside that the admins wearing sleeveless sports shirts and shorts do not look adequately dressed. Here you want to take off not only your clothing but also your skin. </p>\n<p>

Cooling turns out to be the cornerstone of your own data center: HashFlare have reconstructed the entire ventilation system of the premises according to its needs. 
</p>\n<p><img src=\"https://habrastorage.org/files/d12/f3d/d5a/d12f3dd5ab3444b6b9ebf87a4ac3f416.jpg\" /></p>\n<p><em>Standard air duct has no chance to meet the requirements of a mining farm
</em></p>\n<p>
If you ever decide to sell your soul to the devil in exchange for a work-space in a tropical environment, don’t forget to note that it has to be Thailand and not a mining farm. Otherwise, you can find yourself wearing shorts and flip-flops in the middle of Estonia: 
</p>\n<p><img src=\"https://habrastorage.org/files/0cd/57d/bc5/0cd57dbc5b604674a536db985fd546ee.jpg\" /></p>\n<p><em>At work like on the beach
</em></p>\n<p>Engineers calculated that to keep the temperature of hardware consuming 100 kWh, according to ambient temperature of +25°С, at least at +35°C, the air exchange has to be 35,000 m³/h. It means that you need at least a 5 m² hole for fresh air intake, and 2 air ducts of 630 mm each with fans for air outlet.</p>\n<p><img src=\"https://habrastorage.org/files/b1e/e12/40a/b1ee1240aa4c443e91c5d789df08a273.jpg\" /></p>\n<p><em>While ventilation is under reconstruction, any help is appreciated
</em></p>\n<p>Apart from the overwhelmingly complex cooling systems, the rest seems as easy as piecing together Lego’s: Asrock H81 Pro BTC mother boards, AMD R9 380, R9 380x (Sapphire/MSI) video cards, PCI-E risers used to connect a number of video cards to a limited number of GPU slots on a standard motherboard, and EVGA SuperNOVA 1300 G2 1300W power units are mounted in standard metal racks. 
</p>\n<p><img src=\"https://habrastorage.org/files/fed/fb2/bde/fedfb2bde2584fd7b4ac8e1e0a7369f5.jpg\" /></p>\n<p><img src=\"https://habrastorage.org/files/5f5/e12/dd2/5f5e12dd2f254d8293a53c185f37ed68.jpg\" /></p>\n<p>Demand for Ethereum mining is growing constantly, hence only in Tallinn HashFlare is going to occupy another similar premise close to the first building. At the moment there are only empty shelves with dozens of connected sockets there, but soon everything will change. 
</p>\n<p><img src=\"https://habrastorage.org/files/54a/2c2/884/54a2c288429c4af78953d4c8ac4ba7bd.jpg\" /></p>\n<p>One more data center for 50 GH/s will be opened soon near the premises of an Estonian hydroelectric power plant. The name of this HPP is also kept a secret, but a data center located in a hydroelectric power plant – it sounds really cool!
</p>\n<p><img src=\"https://habrastorage.org/files/19b/891/d85/19b891d858224755a988047dfa614bf7.jpg\" /></p>\n<p><em>Maybe, this HPP looks something like this. But more likely it’s not, as this photo was not taken in Estonia.
</em></p>\n<h1>Security</h1>\n<p>
When you build your own data center, the next priority after equipment and cooling is security. Information makes money, and in this case information is money, even if it’s virtual money. 

Obviously, video cameras are installed in all corners of the farm: </p>\n<p><img src=\"https://habrastorage.org/files/e0c/024/5a5/e0c0245a525a4f9ba9db61c3d8e8dd1c.jpg\" /></p>\n<p><br /></p>\n<p>And you can see what is happening there online using your phone any time: </p>\n<p><img src=\"https://habrastorage.org/files/1b2/9fd/67c/1b29fd67cbac4da4bf40f49404eac3f5.jpg\" /></p>\n<p><br /></p>\n<p>At the moment more than a thousand video cards are working for HF’s clients mining more than 20 Ghs per second to find valuable coins. The scale is constantly growing: the total performance of all HashFlare farms should exceed 100 Ghs/sec. You can start cloud mining Ethereum right now: <a href=\"https://hashflare.io\" rel=\"noopener\">ether.hashflare.eu </a></p>\n<p>

Of course, capabilities of the farm are not limited to Ethereum. This is another advantage of mining on GPU’s – you can mine any currency regardless of the difficulty of its mining algorithm, that is why HashFlare uses a portion of the Hashrate of its farm to experiment with new promising or simply interesting currencies like Dashcoin and some others.</p>\n<p><img src=\"https://img1.steemit.com/0x0/https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\" /></p>\n<p><br /></p>",
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      "body": "Спасибо за комментарий! Вскоре добавим еще много интересных статей.",
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      "author": "hashcoins",
      "body": "<p>Меня везут в здание бывшей фабрики на окраине Таллина. К счастью, не в багажнике, но адрес пункта назначения попросили не разглашать и сооружение снаружи не фотографировать — чтобы интересующиеся по фотографиям не смогли определить, где находится новая майнинговая ферма HashFlare. Как ни удивительно, но желающих это узнать почему-то немало. </p>\n<p><img src=\"https://habrastorage.org/files/6b1/6b1/307/6b16b1307bee4ad191d2fd47bf1af0c8.jpg\" /></p>\n<p>Вряд ли есть на свете люди, которые, проснувшись, решают: а не построить ли мне сегодня личный дата-центр. Обычно к таким решениям приводит цепочка событий и условий, которые и приводят к такому решению. </p>\n<p>HashFlare к этому привело целое сочетание факторов, а началось всё с ажиотажа вокруг новой криптовалюты Ethereum, которая всего за год с небольшим взлетела до капитализации почти в миллиард долларов. Разумеется, клиенты HashFlare захотели получить возможность майнинга новой крипты. </p>\n<p>Майнить «Эфириум» лучшего всего на видеокартах. Почему майнинг на видоекартах быстрее майнинга на процессорах написано уже немало, а особенности некоторых криптовалют делают это и вовсе безнадёжным занятием — скажем, когда валюта использует несколько алгоритмов шифрования, и они идут в определённой последовательности, то при изменении алгоритма, ASIC перестанет работать. Тот же «Этереум» из-за его хитрого алгоритма пока нельзя майнить с помощью ASIC. На GPU же можно добывать любую валюту. </p>\n<p>Однако видеокарты не получится просто поставить в стойки в дата-центре. Их главная проблема — охлаждение. Корпуса современных серверов чётко заточены под максимально эффективное охлаждение: с одной стороны — забор воздуха, с другой — отдача. Даже ASIC-майнеры давно выпускаются в стандартных корпусах, пригодных для размещения в серверных шкафах в дата-центре. Создатели же видеокарт об этом совершенно не заботятся, потому что не были готовы к тому, что кому-то придёт в голову разворачивать целые фермы на их основе. В стойку их не поставить, потому что все видеокарты смотрят в разные стороны, зато если что-то пойдёт не так (бывает, летят вентиляторы и т.д.) — можно просто выключить и убрать поломанное звено. </p>\n<p><img src=\"https://habrastorage.org/files/5d9/4f5/def/5d94f5def2d44b02907feaa0e60b8de5.jpg\" /></p>\n<p><em>В такие моменты начинаешь ценить ремонтопригодность</em></p>\n<p>Можно, конечно, конечно, установить видеокарты в компьютерные корпуса, но это увеличит их цену и осложнит удобство ремонта и замены. Это решение для 1-2 видеокарт, поэтому промышленного интереса не представляет. К тому же админы дата-центров не обучены и не горят желание с ними работать. </p>\n<p>Итак: требуется майнинговая ферма на видеокартах, которую нельзя развернуть в обычном дата-центре. Решение этой проблемы вы уже знаете: построить её самим. О том, как это делается, и пойдёт дальше речь. </p>\n<p>В начале марта HashFlare анонсировал запуск майнинга эфирок, и начал собирать предзаказы, на средства от которых и собрали первую ферму для майнинга Etehereum на видеокартах, которая была запущена в начале апреля. </p>\n<p>Для обустройства фермы компания арендовала помещение на территории бывшей советской фабрики на окраине эстонской столицы. Пустынное и прохладное здание резко теплеет по мере приближения к помещению, где творится магия майнинга. Внутри настолько жарко, что админы в майках и шортах не выглядят убедительно — хочется снять с себя не только одежду, но и кожу. </p>\n<p>Охлаждение оказывается краеугольным камнем собственного дата-центра: прямо сейчас HashFlare переделывает вентиляционные возможности своего помещения под свои нужды. </p>\n<p><img src=\"https://habrastorage.org/files/d12/f3d/d5a/d12f3dd5ab3444b6b9ebf87a4ac3f416.jpg\" /></p>\n<p><em>Стандартный воздуховод и близко не справляется с потребностями майнерской фермы</em></p>\n<p>Если вы когда-нибудь задумаете продать душу дьяволу за работу в жарком климате, обязательно уточните, что это должен быть Таиланд, а не майнинговая ферма, не то рискуете обнаружить себя в шлёпках и шортах посреди Эстонии: </p>\n<p><img src=\"https://habrastorage.org/files/0cd/57d/bc5/0cd57dbc5b604674a536db985fd546ee.jpg\" /></p>\n<p><em>На работу как на пляж</em></p>\n<p>Инженеры подсчитали, что для поддержки температуры железа, потребляющего 100 КВт/ч хотя бы на уровне +35° при расчётной уличной температуре в +25°С потребуется воздухообмен 35 000 м³/час. Это означает, что для забора свежего воздуха необходимо отверстие минимум в 5 м², а для выброса — два воздуховода по 630 мм с вентиляторами.</p>\n<p><img src=\"https://habrastorage.org/files/b1e/e12/40a/b1ee1240aa4c443e91c5d789df08a273.jpg\" /></p>\n<p><em>Пока вентиляция переделывается, не помешает никакая помощь</em></p>\n<p>На этом фоне организация самой фермы выглядит не сложнее сборки Lego: на обычных металлических стеллажах расположились материнские платы Asrock H81 Pro BTC, видеокарты AMD R9 380, R9 380x (Sapphire/MSI), PCI-E райзеры, которые нужны, чтобы к ограниченному количеству разъёмов для GPU на стандартной материнской плате подключить сразу несколько видеокарт, и блоки питания EVGA SuperNOVA 1300 G2 1300W. </p>\n<p><img src=\"https://habrastorage.org/files/fed/fb2/bde/fedfb2bde2584fd7b4ac8e1e0a7369f5.jpg\" /></p>\n<p><img src=\"https://habrastorage.org/files/5f5/e12/dd2/5f5e12dd2f254d8293a53c185f37ed68.jpg\" /></p>\n<p>Спрос на майнинг Этериума растёт, поэтому только в Таллине HashFlare готовится заселять второе такое же помещение по соседству: пока там только пустые стеллажи с десятками подключённых розеток, но скоро всё изменится. </p>\n<p><img src=\"https://habrastorage.org/files/54a/2c2/884/54a2c288429c4af78953d4c8ac4ba7bd.jpg\" /></p>\n<p>Ещё один дата-центр на 50 ГХ скоро откроется на одной из эстонских гидроэлектростанций. На какой — тоже тайна, но дата-центр на ГЭС — это звучит круто.</p>\n<p><img src=\"https://habrastorage.org/files/19b/891/d85/19b891d858224755a988047dfa614bf7.jpg\" /></p>\n<p>Возможно, эта ГЭС выглядит как-то так. Но скорее всего нет, потому что на фото даже не Эстония</p>\n<p><strong>Безопасность</strong></p>\n<p>Строя свой дата-центр, вслед за оборудованием и охлаждением вам нужно будет подумать о безопасности. Информация — это деньги, а в данном случае информация и есть деньги. Пусть и виртуальные. </p>\n<p>Разумеется, ферма со всех сторон просматривается камерами: </p>\n<p><img src=\"https://habrastorage.org/files/e0c/024/5a5/e0c0245a525a4f9ba9db61c3d8e8dd1c.jpg\" /></p>\n<p>Причём смотреть, что на ней происходит, онлайн можно даже с телефона: </p>\n<p><img src=\"https://habrastorage.org/files/1b2/9fd/67c/1b29fd67cbac4da4bf40f49404eac3f5.jpg\" /></p>\n<p>Сейчас на клиентов HF пашет более тысячи видеокарт, промывая в поисках ценных монеток более 20 гигахеш в секунду. Масштабы постоянно растут: суммарная производительность всех ферм HashFlare должна превысить 100 ГХ/сек. Начать облачный майнинг этериума можно уже сегодня: ether.hashflare.eu </p>\n<p>Разумеется, одним эфиром возможности фермы не ограничиваются. В этом преимущество майнинга на GPU — можно добывать любую валюту, каким бы хитровыделанным алгоритмом майнинга она не обладала, поэтому HashFlare использует часть мощностей своей фермы для экспериментов с новыми перспективными и просто любопытными валютами вроде дашкоина и других.</p>\n<p><img src=\"https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\" /></p>",
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      "permlink": "efirnyi-maining-kak-postroit-svoi-data-centr",
      "title": "Эфирный майнинг: как построить свой дата-центр"
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    {
      "author": "hashcoins",
      "body": "<p>Меня везут в здание бывшей фабрики на окраине Таллина. К счастью, не в багажнике, но адрес пункта назначения попросили не разглашать и сооружение снаружи не фотографировать — чтобы интересующиеся по фотографиям не смогли определить, где находится новая майнинговая ферма HashFlare. Как ни удивительно, но желающих это узнать почему-то немало. </p>\n<p><img src=\"https://habrastorage.org/files/6b1/6b1/307/6b16b1307bee4ad191d2fd47bf1af0c8.jpg\" /></p>\n<p>Вряд ли есть на свете люди, которые, проснувшись, решают: а не построить ли мне сегодня личный дата-центр. Обычно к таким решениям приводит цепочка событий и условий, которые и приводят к такому решению. </p>\n<p>HashFlare к этому привело целое сочетание факторов, а началось всё с ажиотажа вокруг новой криптовалюты Ethereum, которая всего за год с небольшим взлетела до капитализации почти в миллиард долларов. Разумеется, клиенты HashFlare захотели получить возможность майнинга новой крипты. </p>\n<p>Майнить «Эфириум» лучшего всего на видеокартах. Почему майнинг на видоекартах быстрее майнинга на процессорах написано уже немало, а особенности некоторых криптовалют делают это и вовсе безнадёжным занятием — скажем, когда валюта использует несколько алгоритмов шифрования, и они идут в определённой последовательности, то при изменении алгоритма, ASIC перестанет работать. Тот же «Этереум» из-за его хитрого алгоритма пока нельзя майнить с помощью ASIC. На GPU же можно добывать любую валюту. </p>\n<p>Однако видеокарты не получится просто поставить в стойки в дата-центре. Их главная проблема — охлаждение. Корпуса современных серверов чётко заточены под максимально эффективное охлаждение: с одной стороны — забор воздуха, с другой — отдача. Даже ASIC-майнеры давно выпускаются в стандартных корпусах, пригодных для размещения в серверных шкафах в дата-центре. Создатели же видеокарт об этом совершенно не заботятся, потому что не были готовы к тому, что кому-то придёт в голову разворачивать целые фермы на их основе. В стойку их не поставить, потому что все видеокарты смотрят в разные стороны, зато если что-то пойдёт не так (бывает, летят вентиляторы и т.д.) — можно просто выключить и убрать поломанное звено. </p>\n<p><img src=\"https://habrastorage.org/files/5d9/4f5/def/5d94f5def2d44b02907feaa0e60b8de5.jpg\" /></p>\n<p><em>В такие моменты начинаешь ценить ремонтопригодность</em></p>\n<p>Можно, конечно, конечно, установить видеокарты в компьютерные корпуса, но это увеличит их цену и осложнит удобство ремонта и замены. Это решение для 1-2 видеокарт, поэтому промышленного интереса не представляет. К тому же админы дата-центров не обучены и не горят желание с ними работать. </p>\n<p>Итак: требуется майнинговая ферма на видеокартах, которую нельзя развернуть в обычном дата-центре. Решение этой проблемы вы уже знаете: построить её самим. О том, как это делается, и пойдёт дальше речь. </p>\n<p>В начале марта HashFlare анонсировал запуск майнинга эфирок, и начал собирать предзаказы, на средства от которых и собрали первую ферму для майнинга Etehereum на видеокартах, которая была запущена в начале апреля. </p>\n<p>Для обустройства фермы компания арендовала помещение на территории бывшей советской фабрики на окраине эстонской столицы. Пустынное и прохладное здание резко теплеет по мере приближения к помещению, где творится магия майнинга. Внутри настолько жарко, что админы в майках и шортах не выглядят убедительно — хочется снять с себя не только одежду, но и кожу. </p>\n<p>Охлаждение оказывается краеугольным камнем собственного дата-центра: прямо сейчас HashFlare переделывает вентиляционные возможности своего помещения под свои нужды. </p>\n<p><img src=\"https://habrastorage.org/files/d12/f3d/d5a/d12f3dd5ab3444b6b9ebf87a4ac3f416.jpg\" /></p>\n<p><em>Стандартный воздуховод и близко не справляется с потребностями майнерской фермы</em></p>\n<p>Если вы когда-нибудь задумаете продать душу дьяволу за работу в жарком климате, обязательно уточните, что это должен быть Таиланд, а не майнинговая ферма, не то рискуете обнаружить себя в шлёпках и шортах посреди Эстонии: </p>\n<p><img src=\"https://habrastorage.org/files/0cd/57d/bc5/0cd57dbc5b604674a536db985fd546ee.jpg\" /></p>\n<p><em>На работу как на пляж</em></p>\n<p>Инженеры подсчитали, что для поддержки температуры железа, потребляющего 100 КВт/ч хотя бы на уровне +35° при расчётной уличной температуре в +25°С потребуется воздухообмен 35 000 м³/час. Это означает, что для забора свежего воздуха необходимо отверстие минимум в 5 м², а для выброса — два воздуховода по 630 мм с вентиляторами.</p>\n<p><img src=\"https://habrastorage.org/files/b1e/e12/40a/b1ee1240aa4c443e91c5d789df08a273.jpg\" /></p>\n<p><em>Пока вентиляция переделывается, не помешает никакая помощь</em></p>\n<p>На этом фоне организация самой фермы выглядит не сложнее сборки Lego: на обычных металлических стеллажах расположились материнские платы Asrock H81 Pro BTC, видеокарты AMD R9 380, R9 380x (Sapphire/MSI), PCI-E райзеры, которые нужны, чтобы к ограниченному количеству разъёмов для GPU на стандартной материнской плате подключить сразу несколько видеокарт, и блоки питания EVGA SuperNOVA 1300 G2 1300W. </p>\n<p><img src=\"https://habrastorage.org/files/fed/fb2/bde/fedfb2bde2584fd7b4ac8e1e0a7369f5.jpg\" /></p>\n<p><img src=\"https://habrastorage.org/files/5f5/e12/dd2/5f5e12dd2f254d8293a53c185f37ed68.jpg\" /></p>\n<p>Спрос на майнинг Этериума растёт, поэтому только в Таллине HashFlare готовится заселять второе такое же помещение по соседству: пока там только пустые стеллажи с десятками подключённых розеток, но скоро всё изменится. </p>\n<p><img src=\"https://habrastorage.org/files/54a/2c2/884/54a2c288429c4af78953d4c8ac4ba7bd.jpg\" /></p>\n<p>Ещё один дата-центр на 50 ГХ скоро откроется на одной из эстонских гидроэлектростанций. На какой — тоже тайна, но дата-центр на ГЭС — это звучит круто.</p>\n<p><img src=\"https://habrastorage.org/files/19b/891/d85/19b891d858224755a988047dfa614bf7.jpg\" /></p>\n<p>Возможно, эта ГЭС выглядит как-то так. Но скорее всего нет, потому что на фото даже не Эстония</p>\n<p><strong>Безопасность</strong></p>\n<p>Строя свой дата-центр, вслед за оборудованием и охлаждением вам нужно будет подумать о безопасности. Информация — это деньги, а в данном случае информация и есть деньги. Пусть и виртуальные. </p>\n<p>Разумеется, ферма со всех сторон просматривается камерами: </p>\n<p><img src=\"https://habrastorage.org/files/e0c/024/5a5/e0c0245a525a4f9ba9db61c3d8e8dd1c.jpg\" /></p>\n<p>Причём смотреть, что на ней происходит, онлайн можно даже с телефона: </p>\n<p><img src=\"https://habrastorage.org/files/1b2/9fd/67c/1b29fd67cbac4da4bf40f49404eac3f5.jpg\" /></p>\n<p>Сейчас на клиентов HF пашет более тысячи видеокарт, промывая в поисках ценных монеток более 20 гигахеш в секунду. Масштабы постоянно растут: суммарная производительность всех ферм HashFlare должна превысить 100 ГХ/сек. Начать облачный майнинг этериума можно уже сегодня: ether.hashflare.eu </p>\n<p>Разумеется, одним эфиром возможности фермы не ограничиваются. В этом преимущество майнинга на GPU — можно добывать любую валюту, каким бы хитровыделанным алгоритмом майнинга она не обладала, поэтому HashFlare использует часть мощностей своей фермы для экспериментов с новыми перспективными и просто любопытными валютами вроде дашкоина и других.</p>\n<p><img src=\"https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\" /></p>",
      "json_metadata": "{\"tags\":[\"mining\"],\"image\":[\"https://habrastorage.org/files/6b1/6b1/307/6b16b1307bee4ad191d2fd47bf1af0c8.jpg\",\"https://habrastorage.org/files/5d9/4f5/def/5d94f5def2d44b02907feaa0e60b8de5.jpg\",\"https://habrastorage.org/files/d12/f3d/d5a/d12f3dd5ab3444b6b9ebf87a4ac3f416.jpg\",\"https://habrastorage.org/files/0cd/57d/bc5/0cd57dbc5b604674a536db985fd546ee.jpg\",\"https://habrastorage.org/files/b1e/e12/40a/b1ee1240aa4c443e91c5d789df08a273.jpg\",\"https://habrastorage.org/files/fed/fb2/bde/fedfb2bde2584fd7b4ac8e1e0a7369f5.jpg\",\"https://habrastorage.org/files/5f5/e12/dd2/5f5e12dd2f254d8293a53c185f37ed68.jpg\",\"https://habrastorage.org/files/54a/2c2/884/54a2c288429c4af78953d4c8ac4ba7bd.jpg\",\"https://habrastorage.org/files/19b/891/d85/19b891d858224755a988047dfa614bf7.jpg\",\"https://habrastorage.org/files/e0c/024/5a5/e0c0245a525a4f9ba9db61c3d8e8dd1c.jpg\",\"https://habrastorage.org/files/1b2/9fd/67c/1b29fd67cbac4da4bf40f49404eac3f5.jpg\",\"https://habrastorage.org/files/eb1/57f/5f9/eb157f5f90f54032aa2b80b1c2973a73.png\"]}",
      "parent_author": "",
      "parent_permlink": "mining",
      "permlink": "efirnyi-maining-kak-postroit-svoi-data-centr",
      "title": "Эфирный майнинг: как построить свой дата-центр"
    }
  ],
  "op_in_trx": 0,
  "timestamp": "2016-07-26T09:26:21",
  "trx_id": "43a4e1bf1073cb0be72557fbab74a6a636ba3e9f",
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{
  "block": 3526588,
  "op": [
    "account_create",
    {
      "active": {
        "account_auths": [],
        "key_auths": [
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        ],
        "weight_threshold": 1
      },
      "creator": "steem",
      "fee": "3.000 STEEM",
      "json_metadata": "",
      "memo_key": "STM5Ya8K4W5ocR5FvQj6tTMTpuC7467BPoreagF3NhDyZUbVMVFsj",
      "new_account_name": "hashcoins",
      "owner": {
        "account_auths": [],
        "key_auths": [
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        ],
        "weight_threshold": 1
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      "posting": {
        "account_auths": [],
        "key_auths": [
          [
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        ],
        "weight_threshold": 1
      }
    }
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  "op_in_trx": 0,
  "timestamp": "2016-07-26T09:07:30",
  "trx_id": "31848f9ae4a6edca9c9f86e01305881575bc82ee",
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}