{"id":30282,"date":"2019-10-31T21:34:39","date_gmt":"2019-10-31T18:34:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/podnozhka-dlya-mozga-platforma-raspredelennogo-reestra-hedera-hashgraph\/"},"modified":"2019-10-31T21:34:39","modified_gmt":"2019-10-31T18:34:39","slug":"podnozhka-dlya-mozga-platforma-raspredelennogo-reestra-hedera-hashgraph","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/podnozhka-dlya-mozga-platforma-raspredelennogo-reestra-hedera-hashgraph","title":{"rendered":"Opora pro mozek: platforma distribuovan\u00e9 knihy Hedera Hashgraph","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Opora pro mozek: platforma distribuovan\u00e9 knihy Hedera Hashgraph\" src=\"\/wp-content\/uploads\/2019\/03\/5ec4e7c6d6cd06d78286e49e40913d62.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nKonsensu\u00e1ln\u00ed algoritmus, asynchronn\u00ed tolerance na nevysv\u011btliteln\u00e9 chyby, orientovan\u00fd acyklick\u00fd graf, distribuovan\u00fd registr \u2014 co spojuje tyto pojmy a jak si nezapl\u00e9st mozek \u2014 v \u010dl\u00e1nku o Hedera Hashgraph.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b>Spole\u010dnost Swirlds Inc. p\u0159edstavuje:<br \/>\n<\/b>Platforma distribuovan\u00e9ho registru Hedera Hashgraph.<\/p>\n<p><b>V hlavn\u00edch rol\u00edch:<br \/>\n<\/b>Limon Baird, matematik, tv\u016frce algoritmu Hashgraph, spoluzakladatel, technick\u00fd \u0159editel a hlavn\u00ed v\u011bdeck\u00fd pracovn\u00edk spole\u010dnosti Swirlds Inc.; <br \/>\nMance Harmon, matematik, spoluzakladatel a gener\u00e1ln\u00ed \u0159editel spole\u010dnosti Swirlds Inc.; <br \/>\nTom Troubridge, prezident Hedera Hashgraph, evangelista technologie Hashgraph.<\/p>\n<p><b>V projektu se pod\u00edlej\u00ed:<br \/>\n<\/b>Finan\u010dn\u00ed holding Nomura Holding; <br \/>\nTelekomunika\u010dn\u00ed spole\u010dnost Deutsche Telekom;<br \/>\nMezin\u00e1rodn\u00ed pr\u00e1vnick\u00e1 firma DLA Piper;<br \/>\nBraz\u00edlsk\u00fd maloobchodn\u00edk Magazine Luiza; <br \/>\n\u0160v\u00fdcarsk\u00e1 korporace Swisscom AG.<\/p>\n<p>Nerozum\u00edm, pro\u010d jsou v\u0161echny informace o Hedera Hashgraph prezentov\u00e1ny tak zmate\u010dn\u011b, jestli je to d\u016fsledkem z\u00e1m\u011brn\u00e9 politiky v\u00fdvoj\u00e1\u0159\u016f, nebo je to n\u00e1hoda. Ale v ka\u017ed\u00e9m p\u0159\u00edpad\u011b bylo velmi obt\u00ed\u017en\u00e9 napsat souvisl\u00fd text o Hedera Hashgraph. Ka\u017ed\u00fdkr\u00e1t, kdy\u017e se zd\u00e1lo, \u017ee u\u017e to ch\u00e1pu, skoro okam\u017eit\u011b se uk\u00e1zalo, \u017ee je to hlubok\u00e9 omyl. Nakonec se zd\u00e1, \u017ee vzniklo n\u011bco smyslupln\u00e9ho, ale p\u0159esto \u2014 \u010dt\u011bte opatrn\u011b, nebezpe\u010d\u00ed vyklouben\u00ed mozku nikam nezmizelo.<\/p>\n<p><b>\u010c\u00e1st 1. \u00dakol byzantsk\u00fdch gener\u00e1l\u016f a drby<br \/>\n<\/b>Na z\u00e1klad\u011b tohoto p\u0159\u00edb\u011bhu le\u017e\u00ed takzvan\u00fd '\u00dakol byzantsk\u00fdch gener\u00e1l\u016f' (Byzantine Fault Tolerance, BFT) \u2014 my\u0161lenkov\u00fd experiment, kter\u00fd m\u00e1 ilustrovat probl\u00e9m synchronizace stavu syst\u00e9m\u016f v p\u0159\u00edpad\u011b, kdy jsou komunikace pova\u017eov\u00e1ny za spolehliv\u00e9, ale uzly nikoli. V\u0161em, kte\u0159\u00ed maj\u00ed z\u00e1jem, mohou prozkoumat tuto ot\u00e1zku zde nebo zde podrobn\u011bji. <\/p>\n<p>Algoritmy platformy Hedera Hashgraph jsou zalo\u017eeny na soukrom\u00e9m p\u0159\u00edpad\u011b byzantsk\u00e9 tolerance chyb \u2014 asynchronn\u00ed \u00fakol byzantsk\u00fdch gener\u00e1l\u016f, nebo aBFT. V roce 2016 poprv\u00e9 nalezl \u0159e\u0161en\u00ed pro n\u011bj matematik Limon Baird a, aby nebyl hloup\u00fd, okam\u017eit\u011b ho patentoval. <\/p>\n<p>Platforma Hedera Hashgraph se vyzna\u010duje spole\u010dn\u00fdm pou\u017e\u00edv\u00e1n\u00edm a synchronizac\u00ed digit\u00e1ln\u00edch dat podle konsenzu\u00e1ln\u00edho algoritmu, fyzickou decentralizac\u00ed uzl\u016f \u00falo\u017ei\u0161t\u011b dat a absenc\u00ed jedin\u00e9ho centra kontroly. Protokol Hashgraph (v tomto p\u0159\u00edpad\u011b je Hedera ekosyst\u00e9m, Hashgraph je protokol) v\u0161ak nepat\u0159\u00ed mezi blockchainy, ale p\u0159edstavuje orientovan\u00fd acyklick\u00fd graf, kter\u00fd se skl\u00e1d\u00e1 z paraleln\u00edch sekvenc\u00ed za\u010d\u00ednaj\u00edc\u00edch na jednom uzlu a r\u016fzn\u00fdmi cestami dosahuj\u00edc\u00edch koncov\u00e9ho uzlu. <\/p>\n<p>Zjednodu\u0161en\u011b \u0159e\u010deno, pokud je klasick\u00fd blockchain vizu\u00e1ln\u011b zobrazen jako p\u0159\u00edsn\u00e1 sekvence \u010dl\u00e1nk\u016f (co\u017e je vlastn\u011b jeho hlavn\u00ed vlastnost\u00ed), pak Hashgraph vizu\u00e1ln\u011b p\u0159ipom\u00edn\u00e1 bonsai s obrovsk\u00fdm mno\u017estv\u00edm v\u011btven\u00ed. Jeliko\u017e je po\u010det sou\u010dasn\u00fdch cykl\u016f prakticky neomezen\u00fd, Hashgraph umo\u017e\u0148uje z\u00e1rove\u0148 realizovat obrovsk\u00e9 mno\u017estv\u00ed transakc\u00ed (v\u00fdvoj\u00e1\u0159i hovo\u0159\u00ed o 250 tis\u00edc\u00edch za sekundu, co\u017e p\u0159ekra\u010duje p\u011btkr\u00e1t mo\u017enosti i Visa, nemluv\u011b o bitcoinov\u00e9 s\u00edti), p\u0159i\u010dem\u017e poplatky za transakci jsou zpravidla nulov\u00e9.<\/p>\n<p>Dal\u0161\u00edm z\u00e1sadn\u00edm rozd\u00edlem Hashgraphu od klasick\u00e9ho blockchainu je subprotokol gossip (protokol klep\u016f). V r\u00e1mci distribuovan\u00e9ho registru ka\u017ed\u00e1 transakce neznamen\u00e1 p\u0159enos v\u0161ech dat, ale pouze informace o informac\u00edch (Gossip about Gossip). O transakci node informuje dv\u011b dal\u0161\u00ed n\u00e1hodn\u00e9 uzly, z nich\u017e ka\u017ed\u00fd zase p\u0159en\u00e1\u0161\u00ed zpr\u00e1vy dal\u0161\u00edm dv\u011bma, a\u017e do okam\u017eiku, kdy po\u010det informovan\u00fdch uzl\u016f dos\u00e1hne dostate\u010dn\u00e9ho mno\u017estv\u00ed pro dosa\u017een\u00ed konsenzu, co\u017e nast\u00e1v\u00e1, kdy\u017e je informov\u00e1na v\u011bt\u0161ina uzl\u016f (a pr\u00e1v\u011b d\u00edky tomu se dosahuje deklarovan\u00e9ho po\u010dtu transakc\u00ed za jednotku \u010dasu). <\/p>\n<p><b>\u010c\u00e1st 2. Zabit\u00fd blockchain nebo ne <br \/>\n<\/b>V sou\u010dasnosti je Hedera Hashgraph ve f\u00e1zi v\u00fdvoje. Konkr\u00e9tn\u011b prob\u00edh\u00e1 testov\u00e1n\u00ed vlastn\u00ed kryptom\u011bny s podporou mikrotransakc\u00ed, distribuovan\u00e9ho s\u00ed\u0165ov\u00e9ho \u00falo\u017ei\u0161t\u011b soubor\u016f a sc\u00e9n\u00e1\u0159\u016f umo\u017e\u0148uj\u00edc\u00edch vytv\u00e1\u0159en\u00ed chytr\u00fdch kontrakt\u016f na z\u00e1klad\u011b jazyk\u016f prost\u0159ed\u00ed Ethereum. <\/p>\n<p>N\u00e1zory na tento projekt se v\u00fdrazn\u011b rozch\u00e1zej\u00ed. N\u011bkter\u00e9 zdroje bez obalu naz\u00fdvaj\u00ed Hashgraph \"zabij\u00e1kem blockchainu\", zat\u00edmco jin\u00e9 spr\u00e1vn\u011b uv\u00e1d\u011bj\u00ed, \u017ee chyb\u00ed p\u0159\u00edklady funguj\u00edc\u00edch decentralizovan\u00fdch aplikac\u00ed v prost\u0159ed\u00ed Hedera. N\u011bkte\u0159\u00ed jsou zmateni t\u00edm, \u017ee z\u00e1klad platformy je patentovan\u00fd, a jej\u00ed v\u00fdvoj je pod kontrolou dozor\u010d\u00ed rady, jej\u00ed\u017e \u010dlenov\u00e9 poch\u00e1zej\u00ed z \u0159ady firem z \u017eeb\u0159\u00ed\u010dku Fortune 500 (i kdy\u017e toto posledn\u00ed pr\u00e1v\u011b nazna\u010duje, \u017ee projekt m\u00e1 re\u00e1ln\u00fd potenci\u00e1l a rozhodn\u011b nen\u00ed podvodem). Mimochodem, p\u0159ed n\u011bjak\u00fdm \u010dasem byl projekt vy\u010dlen\u011bn do samostatn\u00e9 spole\u010dnosti Hedera Hashgraph, co\u017e tak\u00e9 sv\u011bd\u010d\u00ed o jeho priorit\u011b pro v\u00fdvoj\u00e1\u0159e.<\/p>\n<p>V\u00fdvoj\u00e1\u0159i bez velk\u00e9ho povyku nejprve na uzav\u0159en\u00e9 aukci token\u016f vybrali 18 milion\u016f dolar\u016f na provozn\u00ed pot\u0159eby a o n\u011bco pozd\u011bji je\u0161t\u011b 100. O \u017e\u00e1dn\u00fdch konkr\u00e9tn\u00edch pl\u00e1nech ICO se tak\u00e9 nehl\u00e1s\u00ed, a celkov\u011b \u2014 roadmap Hedera Hashgraph se vyzna\u010duje zna\u010dnou nejasnost\u00ed, co\u017e v\u0161ak nebr\u00e1n\u00ed spole\u010dnosti v aktivn\u00edm \u00fasil\u00ed o popularizaci tohoto konsensu\u00e1ln\u00edho algoritmu. Firma aktivn\u011b pracuje na vytv\u00e1\u0159en\u00ed r\u016fzn\u00fdch profesion\u00e1ln\u00edch komunit \u2014 od program\u00e1tor\u016f po pr\u00e1vn\u00edky. Z\u00e1stupci projektu u\u017e uskute\u010dnili v\u00edce ne\u017e 80 setk\u00e1n\u00ed se zainteresovan\u00fdmi osobami po cel\u00e9m sv\u011bt\u011b, dokonce i do Ruska se dostali \u2014 6. b\u0159ezna se v Moskv\u011b konalo setk\u00e1n\u00ed s prezidentem Hedera Hashgraph Tomem Troubridge, kter\u00e9, jak se \u0159\u00edk\u00e1, p\u0159il\u00e1kalo mnoho z\u00e1stupc\u016f na\u0161ich IT a finan\u010dn\u00edch kruh\u016f.<\/p>\n<p>Pan Troubridge sd\u011blil, \u017ee se v nejbli\u017e\u0161\u00ed dob\u011b o\u010dek\u00e1v\u00e1 alespo\u0148 40 decentralizovan\u00fdch aplikac\u00ed na b\u00e1zi Hedera Hashgraph, a celkov\u011b je jich ve v\u00fdvoji v\u00edce ne\u017e 100, tak\u017ee v dohledn\u00e9 budoucnosti budou m\u00edt v\u0161ichni \u0161anci vid\u011bt na\u017eivo, jak tento syst\u00e9m funguje.<\/p>\n<p><b>Celkem <br \/>\n<\/b>Obecn\u011b lze s jistotou \u0159\u00edci n\u011bkolik v\u011bc\u00ed. Za prv\u00e9, projekt nen\u00ed trivi\u00e1ln\u00ed a ji\u017e vyvolal zna\u010dn\u00fd z\u00e1jem z\u00e1stupc\u016f velk\u00fdch korporac\u00ed. Za druh\u00e9, pro laiky je otev\u0159en\u011b obt\u00ed\u017en\u011b pochopiteln\u00fd, co\u017e z\u0159ejm\u011b vysv\u011btluje nedostatek informac\u00ed o n\u011bm v otev\u0159en\u00e9m p\u0159\u00edstupu (a tak\u00e9, podle videa s panem Limonem, to, \u017ee tento inteligentn\u00ed p\u00e1n rozhodn\u011b nen\u00ed \u0159e\u010dn\u00edk). Za t\u0159et\u00ed, je nepravd\u011bpodobn\u00e9, \u017ee se stane \u201ezabij\u00e1kem bitcoinu\u201c nebo n\u011b\u010d\u00edm tak patetick\u00fdm, ale jeho deklarovan\u00e9 v\u00fdhody vypadaj\u00ed dost p\u0159esv\u011bd\u010div\u011b, aby bylo mo\u017en\u00e9 projekt velmi pe\u010dliv\u011b sledovat.<\/p>\n<p>T\u00edm sp\u00ed\u0161 se \u0161\u00ed\u0159\u00ed zv\u011bsti, \u017ee organiz\u00e1to\u0159i brzy pl\u00e1nuj\u00ed p\u0159il\u00e1kat dal\u0161\u00ed tran\u0161 investic, a je velmi pravd\u011bpodobn\u00e9, \u017ee se na tom d\u00e1 docela dob\u0159e participovat.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/utex\/blog\/445286\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0410\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u043a\u043e\u043d\u0441\u0435\u043d\u0441\u0443\u0441\u0430, \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u0430\u044f \u0442\u043e\u043b\u0435\u0440\u0430\u043d\u0442\u043d\u043e\u0441\u0442\u044c \u043a \u043d\u0435\u043e\u0431\u044a\u044f\u0441\u043d\u0438\u043c\u044b\u043c \u043e\u0448\u0438\u0431\u043a\u0430\u043c, \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0430\u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0433\u0440\u0430\u0444, \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u0439 \u0440\u0435\u0435\u0441\u0442\u0440 \u2014 \u043e \u0442\u043e\u043c, \u0447\u0442\u043e \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u044d\u0442\u0438 \u043f\u043e\u043d\u044f\u0442\u0438\u044f, \u0438 \u043a\u0430\u043a \u043d\u0435 \u0432\u044b\u0432\u0438\u0445\u043d\u0443\u0442\u044c \u0441\u0435\u0431\u0435 \u043c\u043e\u0437\u0433 \u2014 \u0432 \u0441\u0442\u0430\u0442\u044c\u0435 \u043e Hedera Hashgraph. \u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Swirlds Inc. \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442: \u041f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0440\u0435\u0435\u0441\u0442\u0440\u0430 Hedera Hashgraph. \u0412 \u0433\u043b\u0430\u0432\u043d\u044b\u0445 \u0440\u043e\u043b\u044f\u0445: \u041b\u0438\u043c\u043e\u043d \u0411\u0430\u0438\u0440\u0434, \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a, \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 Hashgraph, \u0441\u043e\u0443\u0447\u0440\u0435\u0434\u0438\u0442\u0435\u043b\u044c, \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440 \u0438 \u0433\u043b\u0430\u0432\u043d\u044b\u0439 \u043d\u0430\u0443\u0447\u043d\u044b\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-30282","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0410\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u043a\u043e\u043d\u0441\u0435\u043d\u0441\u0443\u0441\u0430.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/podnozhka-dlya-mozga-platforma-raspredelennogo-reestra-hedera-hashgraph\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" 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