{"id":34612,"date":"2019-10-31T21:59:22","date_gmt":"2019-10-31T18:59:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blokchejn-chto-nam-stoit-kejs-postroit\/"},"modified":"2019-10-31T21:59:22","modified_gmt":"2019-10-31T18:59:22","slug":"blokchejn-chto-nam-stoit-kejs-postroit","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/blokchejn-chto-nam-stoit-kejs-postroit","title":{"rendered":"Plokia: mida me peame selle loomiseks tegema?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><i>Kogu inimkonna ajalugu on katsetamine vanade seaduslike kordade h\u00e4vitamiseks ja uue, muidugi paremaga, \u00fclesehitamiseks. (Anon\u00fc\u00fcmne autor)<\/i><\/p>\n<p>Eelmises artiklis <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/443282\/\">\u201eMida me peame plokiahelat looma?\u201c<\/a><\/noindex> Oleme uurinud tehnoloogiaid, millel k\u00f5ik plokiahelad p\u00f5hinevad. On aeg m\u00f5ista, milliseid \u00fclesandeid saavad t\u00e4nap\u00e4eva plokiahelad lahendada. Alustame plokiahela praeguse olukorra ja tuleviku perspektiivide anal\u00fc\u00fcsist. Tehnilise spetsialistina t\u00f5mbab mind ettev\u00f5te Gartner oma paljude tehnoloogiate k\u00fcpsusets\u00fcklitega (Hype Cycles). Graafikul on kujutatud plokiahela k\u00fcpsusets\u00fcklit \u00e4ri kontekstis 2018. aasta l\u00f5puks. Milliseid j\u00e4reldusi on v\u00f5imalik teha?<\/p>\n<p><img decoding=\"async\" alt=\"Plokia: mida me peame selle loomiseks tegema?\" src=\"\/wp-content\/uploads\/2019\/05\/04333a58930b95f2e99fee0da1769e75.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Gartneri anal\u00fc\u00fcs<\/h2>\n<p><\/p>\n<ul>\n<li>Graafikust on n\u00e4ha, et paljud t\u00e4nap\u00e4evased t\u00f6\u00f6stused p\u00fc\u00fcavad rakendada plokiahelat oma tootmisprobleemide lahendamiseks ja iga aasta tekivad uued t\u00f6\u00f6stusharud, mis hakkavad plokiahelat uurima.<\/li>\n<li>Sellega seoses pole \u00fckski t\u00f6\u00f6stusharu veel saavutanud ei tootlikkuse platoo ega isegi valgustatuse k\u00fcnnist. <\/li>\n<li>Muidugi, mitte k\u00f5ik t\u00f6\u00f6stusharud, mis praegu suunduvad ootuste tippu, ei saavuta tootlikkuse platoo, kuid arvestades liikumise ulatust, saame 5-10 aasta p\u00e4rast olema tunnistajaks mitmete kasutusjuhtude laialdasemale rakendamisele. <\/li>\n<li>Ja kus siis Bitcoin, kaevandamine ja kogu kr\u00fcptovaluuta, k\u00fcsite te? Need tehnoloogiad toovad ju m\u00e4rkimisv\u00e4\u00e4rset tulu? Nad olid varasemate aastate graafikutes, kuid sel aastal on nad tootlikkuse platoo juba maha j\u00e4tnud oma etten\u00e4htud 10 aastat.<\/li>\n<\/ul>\n<p>\nJ\u00e4rgmine graafik n\u00e4itab plokiahela tehnoloogiate k\u00fcpsust: <\/p>\n<p><img decoding=\"async\" alt=\"Plokia: mida me peame selle loomiseks tegema?\" src=\"\/wp-content\/uploads\/2019\/05\/2259bd38955f4b7c631fa7e20645405c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMida saab selle graafiku kohta \u00f6elda?<\/p>\n<ul>\n<li>Enamik t\u00e4nap\u00e4eva plokiahela tehnoloogiaid on samuti arutelu laineharjal. Kuid mitte sellep\u00e4rast, et need oleks uued tehnoloogiad, vaid kuna t\u00f6\u00f6stusharud uurivad nende rakendatavust oma andmestruktuuri, mahu ja t\u00f6\u00f6tlemise kiirusest, otsivad v\u00f5imalusi, kuidas plokiahela tehnoloogiate abil t\u00f5husust suurendada ja kulusid v\u00e4hendada. <\/li>\n<li>Kr\u00fcptovaluutade kaevandamise, klassikalise plokiahela ja \u00fcldiselt jaotatud registritehnoloogia vastu huvi hakkab v\u00e4henema. <\/li>\n<\/ul>\n<p>\nVaatame n\u00fc\u00fcd, millistes t\u00f6\u00f6stusharudes p\u00fc\u00fctakse rakendada plokiahelat. Gartner viis 2018. aasta l\u00f5pus l\u00e4bi uuringu ja esitles selle tulemusi matriitsi kujul, kus horisontaalsete ridade all on loetletud kasutusjuhud, vertikaalsete alla t\u00f6\u00f6stusharud ning ringid nende ristumiskohas n\u00e4itavad, kui n\u00f5utud on teatud kasutusjuht konkreetses t\u00f6\u00f6stuses:<\/p>\n<p><img decoding=\"async\" alt=\"Plokia: mida me peame selle loomiseks tegema?\" src=\"\/wp-content\/uploads\/2019\/05\/76c139d7039f3a05e8006a1f9921e2c8.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMilliseid j\u00e4reldusi saame teha sellest tabelist?<\/p>\n<ul>\n<li>Enamik projekte kasutab plokiahelat andmete salvestamiseks, levitamiseks ja jagamiseks (Shared Record Keeping ja Internal Record Keeping).<\/li>\n<li>M\u00e4rkimisv\u00e4\u00e4rne osa projektidest kasutab plokiahelat v\u00e4\u00e4rtuse liikumise v\u00f5i omanike vahetuse j\u00e4lgimiseks (Asset Tracking).<\/li>\n<li>Identifitseerimine (Identity Management) on j\u00e4rk-j\u00e4rgult vajalik peaaegu k\u00f5ikides t\u00f6\u00f6stusharudes.<\/li>\n<li>Praegu ei ole tokeniseerimine (Digital Tokens) eriti n\u00f5utud ning \u00fcllatav on see, et sama kehtib ka nutikas lepingute (Smart Contracts) kohta.<\/li>\n<\/ul>\n<p><\/p>\n<h2>Kokkuv\u00f5ttev plokiahela skeem<\/h2>\n<p>\nKui blockchain'i joonistatakse m\u00f5ne t\u00f6\u00f6stuse kontekstis, on k\u00f5ik skeemid p\u00f5him\u00f5tteliselt identsed: on blockchain-v\u00f5rk, kuhu osalejad kirjutavad ja loevad teavet Dapp'i (detsentraliseeritud rakenduse) abil. Erinevused on detailides, n\u00e4iteks v\u00f5ivad teavet blockchain'i salvestada mitte ainult inimesed, vaid ka asjad IoT (Internet of Things) platvormilt. Vaatame \u00fcldist sch ema IoT n\u00e4ites, kuna see on \u00fcks k\u00f5ige arutatud blockchain'i rakendusi. T\u00e4iendame IoT seadmeid SIM-kaardiga andmete edastamiseks, kasutades mobiilsideoperaatori v\u00f5rgusuutlikkust, v\u00f5i paremini eSIM-i, et saaksime kasutada erinevaid mobiilne t v\u00f5rke. Mobiilsidev\u00f5rk on loomulikult 5G, kuna IoT seadmete teenindamine on \u00fcks 5G v\u00f5rgu peamisi rakendusi. GPS \/ GLONASS moodulid j\u00e4lgivad asukohta. T\u00e4isfunktsionaalsete nutilepingute t\u00f6\u00f6ks on vajalik teavet v\u00e4lisest allikast, n\u00e4iteks aktsiate v\u00f5i valuutade praeguseid kursse. Sel eesm\u00e4rgil kasutatakse nn blockchain-oraakleid. Viimane detail on tehisintellekti moodul andmete anal\u00fc\u00fcsimiseks. <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.oceanprotocol.com\/blockchains-for-artificial-intelligence-ec63b0284984\">Uuringud \u00fctlevad<\/a><\/noindex>, et AI (tehisintellekt) algoritmid saavad t\u00f5husalt t\u00f6\u00f6tada plokiahela andmetel, sest need on t\u00e4ielikud, vastuoludeta ja ajaliselt selgelt j\u00e4rjestatud.<\/p>\n<p>Nii saime kokkuv\u00f5tliku skeemi plokiahela projektide kohta. N\u00fc\u00fcd on sellele v\u00f5imalik kirjutada igasuguseid pealkirju ja muuta skeem sobivaks erinevatele valdkondadele. N\u00e4iteks \"Tankerite j\u00e4lgimine naftasektoris\" v\u00f5i \"Detailide tootmine autot\u00f6\u00f6stuses\" v\u00f5i \"Talumeeste liha tarnimine jaem\u00fc\u00fcgipoodidesse\".<\/p>\n<h2>Plokiahel + IoT + 5G + GPS + AI<\/h2>\n<p>\n<img decoding=\"async\" alt=\"Plokia: mida me peame selle loomiseks tegema?\" src=\"\/wp-content\/uploads\/2019\/05\/af29e1cad5a1e06b3e5b85f082a79117.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLiigume konkreetsete juhtumite juurde.<\/p>\n<h2>Juhtumite anal\u00fc\u00fcs<\/h2>\n<p>\n\u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u043f\u043e\u0434\u0431\u0435\u0440\u0435\u043c \u043a\u0435\u0439\u0441\u044b \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u0438\u043d\u0434\u0443\u0441\u0442\u0440\u0438\u0439 \u0438 \u043f\u043e\u0434\u0443\u043c\u0430\u0435\u043c, \u043d\u0430 \u043a\u0430\u043a\u0438\u0445 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u0430\u0445 \u0438\u0445 \u043c\u043e\u0436\u043d\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c. \u041e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u0438\u0441\u043a\u0430\u0442\u044c \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u043d\u0430\u0434\u043e, \u0442.\u043a. \u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u0430\u044f &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/sdlt.io\/cases\">Plokiahela juhtumite raamatukogu<\/a><\/noindex>&#187; \u0441 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u043c\u0438 \u0438 \u0441\u0441\u044b\u043b\u043a\u0430\u043c\u0438. \u0412 \u043d\u0435\u0439 \u0441\u043e\u0431\u0440\u0430\u043d\u044b \u043a\u0435\u0439\u0441\u044b \u043f\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044e \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u0430 \u0432 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 \u0438\u043d\u0434\u0443\u0441\u0442\u0440\u0438\u044f\u0445:<\/p>\n<ul>\n<li>autot\u00f6\u00f6stus<\/li>\n<li>avalik sektor<\/li>\n<li>kaevandussektor<\/li>\n<li>tervishoid<\/li>\n<li>kultuur ja kunst<\/li>\n<li>kinnisvara<\/li>\n<li>tootmine<\/li>\n<li>jaem\u00fc\u00fck<\/li>\n<li>p\u00f5llumajandus<\/li>\n<li>telekommunikatsioon<\/li>\n<li>transport<\/li>\n<li>rahandussektor<\/li>\n<li>energeetika<\/li>\n<li>autori\u00f5iguste arvestus <\/li>\n<\/ul>\n<p><\/p>\n<h3>J\u00e4reldused juhtumite anal\u00fc\u00fcsist<\/h3>\n<p><\/p>\n<ul>\n<li>Muidugi sobib plokiahel h\u00e4sti finantstehnoloogia valdkonda, kuna tehingud ja v\u00e4\u00e4rtuste omandi\u00f5iguse \u00fcleminek on finantss\u00fcsteemi aluseks. <\/li>\n<li>Plokiahelat on m\u00f5istlik rakendada juhtumites, kus on olemas \"tarneahelad\", n\u00e4iteks konteinerite transport. Konteiner esindab v\u00e4\u00e4rtust, mis antakse \u00fcle \u00fche transpordiettev\u00f5tte omandisse teisele. V\u00f5i n\u00e4iteks toidutoodete m\u00e4rgistamine ja kogu tarneahela j\u00e4lgimine alates talust kuni jaekaubandusesse. Sel juhul saab ostja veenduda, et toode on toodetud konkreetse tootja poolt konkreetsetes tingimustes. Praegu v\u00f5ib sellisesse teavet etikettidel lihtsalt usaldada.<\/li>\n<li>Kehtiv n\u00e4ide IAM (Identiteedi ja Juhtimise Halduse) inimeste tuvastamisest ning isikuandmete hoidmisest. Koos plokiahela tulekuga ilmus lahendus, mis p\u00f5hineb isikuandmete s\u00e4ilitamisel jaotatud registris. Nullteadmiste t\u00f5endamise protokolli abil v\u00f5ib inimene ise otsustada, milliseid andmeid kellelegi edastada. N\u00e4iteks klassikaline n\u00e4ide on t\u00f5estamine, et isik on \u00fcle 18 aasta vana. Praegu kasutatakse selleks passi v\u00f5i juhiluba, kus on andmed, mis ei puuduta kontrollimist, nagu registrisse kantud aadress. Plokiahela kasutamisel saab t\u00f5estada, et inimesel on 18 aastat, avaldamata \u00fclej\u00e4\u00e4nud teavet.<\/li>\n<li>Samuti seondub sellele plokiahelas meditsiiniliste andmete registreerimise juhtum, et neid saaks edastada asutuste vahel, rikkumata konfidentsiaalsust. See on \u00fchine joon paljude juhtumite puhul, kus \u00fchelt poolt on vajalik inimeste tuvastamine ja teabe takistamatu edastamine ning teiselt poolt tuleb kaitsta (kr\u00fcpteerida) isiklikke ja privaatsed andmeid. <\/li>\n<\/ul>\n<p><\/p>\n<h3>Plokiahel ja riik<\/h3>\n<p>\nPaljuski riikides on plokiahela arendamiseks riiklikud programmid. Venemaal on samuti <noindex><a rel=\"nofollow\" href=\"https:\/\/data-economy.ru\">digitaalsete transformatsioonide programm<\/a><\/noindex>, kus plokiahel (jaotatud register) on arendamise suundade hulgas. Riigi jaoks on plokiahela arendamine oluline j\u00e4rgmistes valdkondades: <\/p>\n<ul>\n<li>Aineloogiliste tehingute registrite loomine, n\u00e4iteks kinnisvara puhul;<\/li>\n<li>Elukohaga seotud aktide registreerimise registrite loomine, n\u00e4iteks s\u00fcnnid, abielud, lahutused;<\/li>\n<li>Valimiste ja h\u00e4\u00e4letuste tulemuste registreerimine plokiahelas.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Plokiahel ja Telekom<\/h3>\n<p>\nTelekomit\u00f6\u00f6stuses ellu viidud juhtumid m\u00f5jutavad enamikku inimesi. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.tmforum.org\/catalysts\/blockchain-unleashed\">TM Forumi arvates<\/a><\/noindex> on sideettev\u00f5tete jaoks plokiahela rakendamine k\u00f5ige asjakohasem j\u00e4rgmiste \u00fclesannete lahendamiseks:<\/p>\n<ul>\n<li>Operaatorid saavad k\u00f5rvaldada vahendusettev\u00f5tted (selgearvutuskeskused) r\u00e4ndlusteenuste pakkumisel ja teha makseid omavahel otse. <\/li>\n<li>Inimeste ja IoT seadmete tuvastamine.<\/li>\n<li>Tellimuse teeninduse rikkumiste automaatne arvestamine (SLA) nutilepingute alusel ja h\u00fcvitiste v\u00e4ljamaksmine. <\/li>\n<li>Jagatud varastatud telefonide andmebaasi haldamine.<\/li>\n<li>Jagatud andmebaasi haldamine MNP (Mobiilse Numbrite \u00dcmberkanne) jaoks ja vahendaja vabastamine tsentraliseeritud andmebaasi kaudu. <\/li>\n<\/ul>\n<p><\/p>\n<h2>Plokiahelate anal\u00fc\u00fcsimine.<\/h2>\n<p>\nS\u00fcsteemide korrastamise eesm\u00e4rgil proovisin leida plokiahelate klassifikatsiooni p\u00f5lvkondade j\u00e4rgi. \u00dcksmeelt ei leitud, kuid k\u00f5ik on n\u00f5us, et esimene p\u00f5lvkond on Bitcoin, teine Ethereum ja edasi s\u00f5ltub k\u00f5ik isiklikest eelistustest. Minu arvates on m\u00f5istlik j\u00e4rgmine klassifikatsioon: <\/p>\n<ul>\n<li>Esimene p\u00f5lvkond (Bitcoin): toetab ainult kr\u00fcptovaluutade edastamise funktsionaalsust \u00fchelt kontolt teisele.<\/li>\n<li>Teise p\u00f5lvkonna lisati nutilepingud (Ethereun) ja mitme valuuta toetamine (BitShares).<\/li>\n<li>Kolmas p\u00f5lvkond v\u00f5imaldab opereerida mitte ainult kr\u00fcptovaluutaga, vaid ka igasuguste digitaalse varaga (assets), rakendada vabalt \u00e4riloogikat ja paindlikult seadistada konsensuse algoritmi. Universaalse plokiahela n\u00e4ide on Hyperledger Fabric. <\/li>\n<\/ul>\n<p>\nVaatame k\u00f5igi p\u00f5lvkondade esindajaid nende omaduste vaatenurgast, mis aitavad m\u00f5ista, milliseid juhtumeid saab ellu viia selle v\u00f5i teise plokiahela abil:<\/p>\n<p>Bitcoin<br \/>\nEthereum<br \/>\nBitshares<br \/>\nHyperledger Fabric<br \/>\nExonum<\/p>\n<p>Plokiaeg, mis p\u00f5hineb plokiahelal<br \/>\n1<br \/>\n2<br \/>\n2<br \/>\n3<br \/>\n3<\/p>\n<p>Veebileht<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/bitcoin.org\/en\/\">bitcoin.org\/en<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/ethereum.org\/\">ethereum.org<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/bitshares.org\/\">bitshares.org<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.hyperledger.org\/projects\/fabric\">www.hyperledger.org<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/exonum.com\">exonum.com<\/a><\/noindex><\/p>\n<p>Toimingute kiirus TPS-is<br \/>\n7<br \/>\n20-30<br \/>\n10,000<br \/>\n1000<br \/>\n10,000<\/p>\n<p>Kas on v\u00f5imalik luua privaatne plokiahel<br \/>\nei<br \/>\nei<br \/>\njah<br \/>\njah<br \/>\njah<\/p>\n<p>Node'ide arv v\u00f5rgus<br \/>\nRohkem kui 10 000<br \/>\nRohkem kui 10 000<br \/>\nT\u00f5husalt 20\u201330 node'i<br \/>\nT\u00f5husus m\u00e4\u00e4ratakse Apache Kafka s\u00fcsteemi j\u00e4rgi<br \/>\nT\u00f5husus m\u00e4\u00e4ratakse BFT-konsensuse j\u00e4rgi: 10-20 node'i<\/p>\n<p>Keskmine tehingutasu<br \/>\n0.5$<br \/>\n0.1$<br \/>\nmadalam kui Ethereumis<br \/>\nei<br \/>\nei<\/p>\n<p>Toetatud operatsioonis\u00fcsteemid node'ide jaoks<br \/>\nWindows, Linux, MacOS<br \/>\nWindows, Linux, MacOS, Raspberry Pi<br \/>\nUbuntu, Windows<br \/>\nWindows, Linux, MacOS<br \/>\nLinux, MacOS<\/p>\n<p>Node'ide juurutamine<br \/>\nK\u00e4sitsi<br \/>\nK\u00e4sitsi, Docker<br \/>\nK\u00e4sitsi<br \/>\nDocker, docker-compose<br \/>\nK\u00e4sitsi, Docker<\/p>\n<p>Konsensus<br \/>\nPoW<br \/>\nPow<br \/>\nDPoS<br \/>\nH\u00e4\u00e4letuss\u00fcsteem, kasutab Apache Kafka<br \/>\nBFT<\/p>\n<p>Nutileping<br \/>\nEi m\u00f5istetud tavap\u00e4rases t\u00e4henduses<br \/>\nProgrammeerimiskeel Solidity<br \/>\nEeltingimustatud ja nende arv on piiratud. T\u00e4iendavad C++-s<br \/>\nProgrammeerimiskeeled Go, JS<br \/>\nRust<\/p>\n<p>Programmeerimiskeel, millega plokiahel on kirjutatud<br \/>\nC++<br \/>\nC++<br \/>\nC++<br \/>\nGo<br \/>\nRust<\/p>\n<p>DB plokiahela andmete salvestamiseks<br \/>\nLevelDB<br \/>\nLevelDB<br \/>\nLevelDB<br \/>\ngoleveldb \u2014 LevelDB Go-s<br \/>\nRocksDB<\/p>\n<p>Arendus ja hooldus<br \/>\nSatoshi Nakamoto &amp; Co<br \/>\nVitalik Buterin &amp; Co<br \/>\nDan Larimer &amp; Co<br \/>\nThe Linux Foundation, IBM, Oracle<br \/>\nBitfury Group<\/p>\n<p>Rakendamise juhtumite piirangud<br \/>\nT\u00f5husus ja komisjoni olemasolu.<br \/>\nT\u00f5husus ja komisjoni olemasolu. Sobib pilootprojektide ja PoC-ide jaoks.<br \/>\nKomisjoni olemasolu ja piiratud arvu rakendatud kasutusstsenaariumid.<br \/>\nHyperledger Fabric \u2014 ei piira sind, kui ootad k\u00f5rgeid j\u00f5udluse omadusi.<br \/>\nExonum piirab BFT konsensust ja k\u00f5rget sisenemispiiri, kuna nutilepingute rakendamiseks tuleb need integreerida l\u00e4htekoodi.<\/p>\n<p><\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nPraegu esitatakse sageli iga uue tehnoloogia kasutamine probleemide lahendusena. Seet\u00f5ttu tuleb k\u00f5igepealt veenduda, et konkreetses olukorras on t\u00f5eliselt vajalik just plokiahel. Selleks tuleb vastata k\u00fcsimustele, kas kogu loetletud funktsionaalsus on vajalik?<\/p>\n<ul>\n<li>Kr\u00fcptograafia<\/li>\n<li>Andmete ajaloo muutumatus ja t\u00e4ielikkus<\/li>\n<li>Jaotatus <\/li>\n<li>Detsentraliseerimine <\/li>\n<li>Tokeniseerimine <\/li>\n<li>Nutilepingud <\/li>\n<\/ul>\n<p>\nKui mitte k\u00f5ik loetletud omadused on vajalikud, siis v\u00f5ib olla t\u00f5husam kasutada teisi tehnoloogiaid, mis ei ole plokiahel. Kui siiski otsustatakse plokiahelat kasutada, tuleb arvestada plokiahela erip\u00e4radega, mida ei saa selle olemuse t\u00f5ttu muuta: <\/p>\n<ul>\n<li>Erinevatel plokiahelatel on erinevad tehnilised omadused ja piirangud, seega tuleb valida vastav plokiahel s\u00f5ltuvalt kasutusjuhtumist.<\/li>\n<li>Blockchain's performance varies significantly depending on the consensus mechanism. Once a particular blockchain is chosen, it's unlikely to be 'optimized.' <\/li>\n<li>Linear scalability is a typical requirement for information systems. However, blockchain may scale worse than linearly. <\/li>\n<li>The data that needs to be stored might have a structure that reduces the efficiency of blockchain application. <\/li>\n<li>In private blockchains, security needs to be ensured at least as robustly as in the corporate IT systems in use. <\/li>\n<\/ul>\n<p>\nDue to these limitations, blockchain is currently primarily used in simplest cases, where the elimination of intermediaries is necessary, or where authenticity and immutability of data must be verified among participants not under a single control. <\/p>\n<p>In the next part, we will deploy a blockchain in the cloud and see how everything works. <\/p>\n<p><b>This is only the beginning! <\/b><br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449986\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u044f \u0438\u0441\u0442\u043e\u0440\u0438\u044f \u0447\u0435\u043b\u043e\u0432\u0435\u0447\u0435\u0441\u0442\u0432\u0430 \u2014 \u044d\u0442\u043e \u043f\u043e\u043f\u044b\u0442\u043a\u0438 \u0440\u0430\u0437\u0440\u0443\u0448\u0438\u0442\u044c \u0441\u0442\u0430\u0440\u044b\u0439 \u043f\u043e\u0440\u044f\u0434\u043e\u043a \u0432\u0435\u0449\u0435\u0439 \u0438 \u043f\u043e\u0441\u0442\u0440\u043e\u0438\u0442\u044c \u043d\u043e\u0432\u044b\u0439, \u0440\u0430\u0437\u0443\u043c\u0435\u0435\u0442\u0441\u044f, \u043b\u0443\u0447\u0448\u0438\u0439. (\u0410\u043d\u043e\u043d\u0438\u043c\u043d\u044b\u0439 \u0430\u0432\u0442\u043e\u0440) \u0412 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u00ab\u0427\u0442\u043e \u043d\u0430\u043c \u0441\u0442\u043e\u0438\u0442 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d \u043f\u043e\u0441\u0442\u0440\u043e\u0438\u0442\u044c?\u00bb \u043c\u044b \u0440\u0430\u0437\u043e\u0431\u0440\u0430\u043b\u0438\u0441\u044c \u0441 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f\u043c\u0438, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0432\u0441\u0435 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u044b. \u041f\u0440\u0438\u0448\u043b\u043e \u0432\u0440\u0435\u043c\u044f \u043f\u043e\u043d\u044f\u0442\u044c \u043a\u0430\u043a\u0438\u0435 \u0437\u0430\u0434\u0430\u0447\u0438 \u043c\u043e\u0433\u0443\u0442 \u0440\u0435\u0448\u0438\u0442\u044c \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435 \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u044b. \u0414\u043b\u044f \u043d\u0430\u0447\u0430\u043b\u0430 \u0434\u0430\u0432\u0430\u0439\u0442\u0435 \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043d\u0430 \u0430\u043d\u0430\u043b\u0438\u0442\u0438\u043a\u0443 \u0442\u0435\u043a\u0443\u0449\u0435\u0433\u043e \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f \u0431\u043b\u043e\u043a\u0447\u0435\u0439\u043d\u0430 \u0438 \u043f\u0435\u0440\u0441\u043f\u0435\u043a\u0442\u0438\u0432\u0430\u0445 \u043d\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26080,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u044f \u0438\u0441\u0442\u043e\u0440\u0438\u044f \u0447\u0435\u043b\u043e\u0432\u0435\u0447\u0435\u0441\u0442\u0432\u0430 \u2014 \u044d\u0442\u043e \u043f\u043e\u043f\u044b\u0442\u043a\u0438 \u0440\u0430\u0437\u0440\u0443\u0448\u0438\u0442\u044c \u0441\u0442\u0430\u0440\u044b\u0439 \u043f\u043e\u0440\u044f\u0434\u043e\u043a \u0432\u0435\u0449\u0435\u0439 \u0438 \u043f\u043e\u0441\u0442\u0440\u043e\u0438\u0442\u044c \u043d\u043e\u0432\u044b\u0439, \u0440\u0430\u0437\u0443\u043c\u0435\u0435\u0442\u0441\u044f, \u043b\u0443\u0447\u0448\u0438\u0439. 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(Anon\u00fc\u00fcmne autor) Eelmisel artiklis \"Mida meil l\u00e4heb vaja, et ehitada plokiahel?\" uurisime tehnoloogiaid, millel k\u00f5ik plokiahelad p\u00f5hinevad. On aeg m\u00f5ista, milliseid \u00fclesandeid t\u00e4nap\u00e4evased plokiahelad lahendada saavad. 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