{"id":90281,"date":"2020-07-30T13:42:14","date_gmt":"2020-07-30T11:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/kak-uma-tech-infrastrukturu-razvivala"},"modified":"2020-07-30T13:42:14","modified_gmt":"2020-07-30T11:42:14","slug":"kak-uma-tech-infrastrukturu-razvivala","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/kak-uma-tech-infrastrukturu-razvivala","title":{"rendered":"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><i>Spustili sme nov\u00e9 slu\u017eby, zvy\u0161oval sa prenos d\u00e1t, menili sme servery, prip\u00e1jali nov\u00e9 lokality a prestavovali d\u00e1tov\u00e9 centr\u00e1 \u2013 a teraz v\u00e1m rozpr\u00e1vame tento pr\u00edbeh, s jeho\u017e za\u010diatkom sme v\u00e1s oboznamovali pred piatimi rokmi.<\/i>.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>P\u00e4\u0165 rokov \u2013 to je charakteristick\u00e1 doba na zhodnotenie medzi\u010dasu. Preto sme sa rozhodli porozpr\u00e1va\u0165 o v\u00fdvoji na\u0161ej infra\u0161trukt\u00fary, ktor\u00e1 pre\u0161la ve\u013emi zauj\u00edmavou cestou za uplynul\u00fdch p\u00e4\u0165 rokov, na ktor\u00fa sme hrd\u00ed. Kvantitat\u00edvne zmeny, ktor\u00e9 sme realizovali, sa premenili na kvalitn\u00e9, teraz infra\u0161trukt\u00fara dok\u00e1\u017ee fungova\u0165 v re\u017eimoch, ktor\u00e9 sa v polovici uplynul\u00e9ho desa\u0165ro\u010dia zdali fantastick\u00e9. <\/p>\n<p>Zabezpe\u010dujeme chod zlo\u017eit\u00fdch projektov s pr\u00edsnymi po\u017eiadavkami na spo\u013eahlivos\u0165 a z\u00e1\u0165a\u017e, medzi ktor\u00fdmi s\u00fa PREMIER a Match TV. Na \u0161portov\u00fdch prenosoch a premietan\u00ed ob\u013e\u00faben\u00fdch seri\u00e1lov je potrebn\u00e9 pren\u00e1\u0161a\u0165 d\u00e1ta v terabitoch\/s, \u010do s \u013eahkos\u0165ou realizujeme, pri\u010dom pr\u00e1ca s tak\u00fdmito r\u00fdchlos\u0165ami sa pre n\u00e1s u\u017e d\u00e1vno stala be\u017enou z\u00e1le\u017eitos\u0165ou. A pred piatimi rokmi bol najn\u00e1ro\u010dnej\u0161\u00edm projektom, ktor\u00fd fungoval na na\u0161ich syst\u00e9moch, Rutube, ktor\u00fd odvtedy r\u00e1stol a zvy\u0161oval objemy a prenosy, \u010do bolo potrebn\u00e9 zoh\u013eadni\u0165 pri pl\u00e1novan\u00ed z\u00e1\u0165a\u017ee.<\/p>\n<p>Hovorili sme o tom, ako sme vyv\u00edjali \"hardv\u00e9r\" na\u0161ej infra\u0161trukt\u00fary (<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/rutube\/blog\/271143\/\">\"Rutube 2009-2015: hist\u00f3ria n\u00e1\u0161ho hardv\u00e9ru\"<\/a><\/noindex>) a vyv\u00edjali syst\u00e9m zodpovedn\u00fd za prenos videa (<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/rutube\/blog\/269227\/\">\"Od nuly po 700 gigabitov za sekundu \u2014 ako pren\u00e1\u0161a video jeden z najv\u00e4\u010d\u0161\u00edch videohostite\u013eov v Rusku\"<\/a><\/noindex>), ale od momentu nap\u00edsania t\u00fdchto textov uplynulo ve\u013ea \u010dasu, bolo vytvoren\u00fdch a implementovan\u00fdch mno\u017estvo in\u00fdch rie\u0161en\u00ed, ktor\u00fdch v\u00fdsledky n\u00e1m umo\u017e\u0148uj\u00fa reagova\u0165 na modern\u00e9 po\u017eiadavky a by\u0165 dostato\u010dne flexibiln\u00ed na to, aby sme sa prisp\u00f4sobili nov\u00fdm \u00faloh\u00e1m.<\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/0b16b324e75393a484da27c0dfb986e7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Sie\u0165ov\u00e9 jadro<\/b> neust\u00e1le rozv\u00edjame. Pre\u0161li sme na zariadenia Cisco v roku 2015, o \u010dom sme spom\u00ednali u\u017e v predch\u00e1dzaj\u00facom \u010dl\u00e1nku. Vtedy to boli st\u00e1le tie ist\u00e9 10\/40G, ale z jasn\u00e9ho d\u00f4vodu sme u\u017e o nieko\u013eko rokov modernizovali existuj\u00face \u0161asi a teraz akt\u00edvne pou\u017e\u00edvame aj 25\/100G. <\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/0a06044153815c872153608724fc79b2.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOdkazy 100G u\u017e d\u00e1vno nie s\u00fa ani luxusom (sk\u00f4r s\u00fa to naliehav\u00e9 po\u017eiadavky s\u00fa\u010dasnosti v na\u0161om segmente), ani zriedkavos\u0165ou ( \u010doraz viac oper\u00e1torov poskytuje pripojenie na tak\u00fdch r\u00fdchlostiach). Av\u0161ak, 10\/40G zost\u00e1va aktu\u00e1lne: cez tieto odkazy na\u010falej prip\u00e1jame oper\u00e1torov s mal\u00fdm objemom prev\u00e1dzky, pri ktor\u00fdch zatia\u013e nie je efekt\u00edvne zap\u00e1ja\u0165 v\u00fdkonn\u00fd port.<\/p>\n<p>Na\u0161e vytvoren\u00e9 sie\u0165ov\u00e9 jadro si zasl\u00fa\u017ei osobitn\u00fa pozornos\u0165 a nesk\u00f4r sa stane t\u00e9mou samostatn\u00e9ho \u010dl\u00e1nku. Tam sa hlb\u0161ie ponor\u00edme do technick\u00fdch detailov a presk\u00famame logiku na\u0161ich krokov pri jeho vytv\u00e1ran\u00ed. Ale teraz budeme pokra\u010dova\u0165 v n\u00e1\u010drte infra\u0161trukt\u00fary viac sch\u00e9maticky, preto\u017ee va\u0161a pozornos\u0165, v\u00e1\u017een\u00ed \u010ditatelia, nie je nekone\u010dn\u00e1.<\/p>\n<p><b>Servery na poskytovanie videa <\/b>sa r\u00fdchlo vyv\u00edjaj\u00fa, na \u010do vynaklad\u00e1me zna\u010dn\u00e9 \u00fasilie. K\u00fdm sme predt\u00fdm pou\u017e\u00edvali predov\u0161etk\u00fdm 2U servery so 4-5 sie\u0165ov\u00fdmi kartami, z ktor\u00fdch ka\u017ed\u00e1 mala dva 10G porty, teraz v\u00e4\u010d\u0161ina prev\u00e1dzky prebieha na 1U serveroch, ktor\u00e9 maj\u00fa 2-3 karty s dvoma 25G portami na ka\u017edej. Karty s 10G a 25G s\u00fa takmer cenovo vyrovnan\u00e9, pri\u010dom r\u00fdchlej\u0161ie rie\u0161enia umo\u017e\u0148uj\u00fa d\u00e1va\u0165 d\u00e1ta ako po 10G, tak aj po 25G. V\u00fdsledkom je o\u010dividn\u00e1 \u00faspora: menej komponentov servera a k\u00e1blov na pripojenie \u2013 ni\u017e\u0161ie n\u00e1klady (a vy\u0161\u0161ia spo\u013eahlivos\u0165), komponenty zaberaj\u00fa menej miesta v stojane \u2013 z\u00edskalo sa viac miest na servery na jednotku plochy a preto sa zn\u00ed\u017eili n\u00e1klady na pren\u00e1jom.<\/p>\n<p>Ale d\u00f4le\u017eitej\u0161\u00ed je zisk na r\u00fdchlosti! Teraz m\u00f4\u017eeme s 1U poskytova\u0165 viac ako 100G! A to na pozad\u00ed situ\u00e1cie, ke\u010f niektor\u00e9 ve\u013ek\u00e9 rusk\u00e9 projekty naz\u00fdvaj\u00fa \"dosiahnut\u00edm\" poskytovanie 40G s 2U. Keby sme mali ich probl\u00e9my!<\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/adfe46a7dc932c6c9d33718555c04189.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPoznamenajme, \u017ee gener\u00e1ciu sie\u0165ov\u00fdch kariet, ktor\u00e9 dok\u00e1\u017eu pracova\u0165 iba na 10G, na\u010falej pou\u017e\u00edvame. Toto vybavenie stabilne funguje a je n\u00e1m dobre zn\u00e1me, preto sme ho nevyhodili, ale na\u0161li mu nov\u00e9 vyu\u017eitie. Tieto komponenty sme nain\u0161talovali do serverov na ukladanie videa, ktor\u00fdm na efekt\u00edvnu pr\u00e1cu jasne nesta\u010d\u00ed jeden alebo dva 1G rozhrania, tu sa 10G karty uk\u00e1zali ako aktu\u00e1lne.<\/p>\n<p><b>Syst\u00e9my ukladania d\u00e1t<\/b> tie\u017e rast\u00fa. V uplynul\u00fdch piatich rokoch sa z dvan\u00e1s\u0165diskov\u00fdch (12x HDD 2U) stali tridsa\u0165\u0161es\u0165diskov\u00fdmi (36x HDD 4U). Tak\u00e9to kapacitu \u201etela\u201c niektor\u00ed sa boja pou\u017e\u00edva\u0165, preto\u017ee v pr\u00edpade poruchy jedn\u00e9ho tak\u00e9ho \u0161asi m\u00f4\u017ee hrozi\u0165 pokles v\u00fdkonnosti \u2013 a to aj funk\u010dnosti! \u2013 pre cel\u00fd syst\u00e9m. Ale u n\u00e1s sa to nestane: zabezpe\u010dili sme z\u00e1lohovanie na \u00farovni georeplikovan\u00fdch k\u00f3pi\u00ed \u00fadajov. Rozmiestnili sme \u0161asi v r\u00f4znych d\u00e1tov\u00fdch centr\u00e1ch \u2013 celkovo pou\u017e\u00edvame tri \u2013 a to vylu\u010duje vznik probl\u00e9mov pri poruch\u00e1ch v \u0161asi a pri v\u00fdpadku lokality.<\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/d262ccfa27883b6e16419beb69a9e366.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSamozrejme, tak\u00fdto pr\u00edstup u\u010dinil hardv\u00e9rov\u00fd RAID nadbyto\u010dn\u00fdm, od ktor\u00e9ho sme upustili. Zbaven\u00edm sa nadbyto\u010dnosti sme z\u00e1rove\u0148 zv\u00fd\u0161ili spo\u013eahlivos\u0165 syst\u00e9mu, \u010do zjednodu\u0161ilo rie\u0161enie a odstr\u00e1nilo jednu z potenci\u00e1lnych por\u00fach. Pripome\u0148me, \u017ee na\u0161e \u00falo\u017en\u00e9 syst\u00e9my s\u00fa \u201evlastnoru\u010dne vyroben\u00e9\u201c. Na toto sme sa rozhodli z celkom vedom\u00e9ho d\u00f4vodu a v\u00fdsledok n\u00e1s \u00faplne uspokojil.<\/p>\n<p><b>D\u00e1tov\u00e9 centr\u00e1<\/b> v uplynul\u00fdch piatich rokoch sme menili nieko\u013ekokr\u00e1t. Od \u010dasu nap\u00edsania predch\u00e1dzaj\u00faceho \u010dl\u00e1nku sme nemenili len jedno d\u00e1tov\u00e9 centrum \u2013 DataLine \u2013 ostatn\u00e9 si vy\u017eiadali v\u00fdmenu v s\u00favislosti s rozvojom na\u0161ej infra\u0161trukt\u00fary. V\u0161etky presuny medzi lokalitami boli pl\u00e1novan\u00e9.<\/p>\n<p>Pred dvoma rokmi sme migrovali v r\u00e1mci MMTS-9, pre\u0161li sme na plochu s kvalitnou renov\u00e1ciou, dobr\u00fdm chladen\u00edm, stabiln\u00fdm nap\u00e1jan\u00edm a bez prachu, ktor\u00fd predt\u00fdm le\u017eal hrub\u00fdmi vrstvami na v\u0161etk\u00fdch povrchoch a tie\u017e hojne zan\u00e1\u0161al vn\u00fatro na\u0161ich zariaden\u00ed. V\u00fdber v prospech kvality slu\u017eieb \u2013 a absencie prachu! \u2013 bol d\u00f4vodom na\u0161ej relok\u00e1cie.<\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/a55336ead2ccb939915f8c93642132c9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nT\u00e9m\u011b\u0159 v\u017edy \u201ejeden presun sa rovn\u00e1 dvom po\u017eiarom\u201c, ale probl\u00e9my po\u010das migr\u00e1cie s\u00fa zaka\u017ed\u00fdm in\u00e9. Tentoraz hlavn\u00fa zlo\u017eitost presunu v r\u00e1mci jedn\u00e9ho d\u00e1tov\u00e9ho centra \u201esp\u00f4sobila\u201c optick\u00e1 prepojovacia uzlov\u00e1 sie\u0165 \u2013 ich medzi-podla\u017en\u00e9 bohatstvo bez zjednotenia do jednej prepojovacej bodu zo strany oper\u00e1torov. Proces aktualiz\u00e1cie a prekl\u00e1dky prepojovac\u00edch uzlov (v \u010dom n\u00e1m pomohli in\u017einieri MMTS-9) bol, pravdepodobne, najn\u00e1ro\u010dnej\u0161ou etapou migr\u00e1cie.<\/p>\n<p>Druh\u00e1 migr\u00e1cia sa uskuto\u010dnila pred rokom, v roku 2019 sme sa pres\u0165ahovali z nie ve\u013emi kvalitn\u00e9ho d\u00e1tov\u00e9ho centra do O2xygen. D\u00f4vody pres\u0165ahovania boli podobn\u00e9 ako uveden\u00e9 vy\u0161\u0161ie, ale k nim sa pridala aj probl\u00e9m s neatraktivnos\u0165ou p\u00f4vodn\u00e9ho d\u00e1tov\u00e9ho centra pre poskytovate\u013eov \u2013 mnoh\u00fdch oper\u00e1torov sme museli \u201edoh\u00e1\u0148a\u0165\u201c na toto miesto sami.<\/p>\n<p><img decoding=\"async\" alt=\"Ako Uma.Tech vyv\u00edjala infra\u0161trukt\u00faru\" src=\"\/wp-content\/uploads\/2020\/07\/1afeb3d5c080b388196d2d522cd540b1.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMigr\u00e1cia 13 stojanov na kvalitn\u00fa plochu v MMTS-9 umo\u017enila rozv\u00edja\u0165 t\u00fato lokalitu nielen ako oper\u00e1torsk\u00fa (p\u00e1r stojanov a \u201eprenosy\u201c oper\u00e1torov), ale aj vyu\u017ei\u0165 ju ako jednu z hlavn\u00fdch. To trochu zjednodu\u0161ilo migr\u00e1ciu z nie ve\u013emi kvalitn\u00e9ho d\u00e1tov\u00e9ho centra \u2013 v\u00e4\u010d\u0161inu vybavenia z neho sme previezli na in\u00fa plochu, a O2xygen dostalo \u00falohu rozv\u00edjaj\u00faceho sa, posielaj\u00fac tam 5 stojanov s vybaven\u00edm.<\/p>\n<p>Dnes je O2xygen u\u017e plnohodnotn\u00e1 plocha, kam \u201epri\u0161li\u201c potrebn\u00ed oper\u00e1tori a na\u010falej sa prid\u00e1vaj\u00fa nov\u00ed. Pre oper\u00e1torov sa O2xygen uk\u00e1zal by\u0165 atrakt\u00edvny aj z h\u013eadiska strategick\u00e9ho rozvoja.<\/p>\n<p>Hlavn\u00fa f\u00e1zu pres\u0165ahovania v\u017edy vykon\u00e1vame za jednu noc, a pri migr\u00e1cii v r\u00e1mci MMTS-9 a na O2xygen sme sa dr\u017eali tohto pravidla. Pod\u010diarkujeme, \u017ee pravidlo \u201epres\u0165ahovanie za noc\u201c striktne dodr\u017eiavame bez oh\u013eadu na po\u010det stojanov! Bol dokonca precedens, ke\u010f sme pres\u00favali 20 stojanov a tie\u017e sme to vykonali za jednu noc. Migr\u00e1cia je dos\u0165 jednoduch\u00fd proces, ktor\u00fd vy\u017eaduje presnos\u0165 a syst\u00e9m, ale aj tu existuj\u00fa ur\u010dit\u00e9 finte ako v pr\u00edprave, tak pri presune, a pri nasadzovan\u00ed na novej lokalite. O migr\u00e1cii v detailoch sme pripraven\u00ed podrobne rozpr\u00e1va\u0165, ak by ste mali z\u00e1ujem.<\/p>\n<p><b>V\u00fdsledky<\/b> P\u00e4\u0165ro\u010dn\u00e9 obdobia rozvoja s\u00fa n\u00e1m bl\u00edzke. Dokon\u010dili sme v\u00fdstavbu novej odolnej infra\u0161trukt\u00fary, rozdelenej do troch centier spracovania d\u00e1t. N\u00e1razovo sme zv\u00fd\u0161ili hustotu prenosu d\u00e1t \u2013 ak sme sa ned\u00e1vno te\u0161ili na 40-80G s 2U, teraz je pre n\u00e1s normou pren\u00e1\u0161a\u0165 100G s 1U. Teraz u\u017e aj terabit prenosu vn\u00edmame ako be\u017enos\u0165. Sme pripraven\u00ed \u010falej rozv\u00edja\u0165 na\u0161u infra\u0161trukt\u00faru, ktor\u00e1 je flexibilne \u0161k\u00e1lovate\u013en\u00e1.<\/p>\n<p><b>Ot\u00e1zka: <\/b>O \u010dom v\u00e1m porozpr\u00e1va\u0165 v nasleduj\u00facich textoch, v\u00e1\u017een\u00ed \u010ditatelia? O tom, pre\u010do sme sa rozhodli vytv\u00e1ra\u0165 vlastn\u00e9 syst\u00e9my ukladania d\u00e1t? O sie\u0165ovej architekt\u00fare a jej \u0161pecifik\u00e1ch? O trikoch a nuans\u00e1ch migr\u00e1cie medzi d\u00e1tov\u00fdmi centrami? O optimaliz\u00e1cii rie\u0161en\u00ed dod\u00e1vania prostredn\u00edctvom v\u00fdberu komponentov a jemn\u00e9ho dola\u010fovania parametrov? O vytv\u00e1ran\u00ed stabiln\u00fdch rie\u0161en\u00ed v\u010faka viacer\u00fdm z\u00e1lo\u017en\u00fdm syst\u00e9mom a horizont\u00e1lnym mo\u017enostiam \u0161k\u00e1lovania v r\u00e1mci d\u00e1tov\u00e9ho centra, ktor\u00e9 s\u00fa realizovan\u00e9 v \u0161trukt\u00fare troch d\u00e1tov\u00fdch centier?<\/p>\n<p><i>Autor: Peter Vinogradov \u2014 Technick\u00fd riadite\u013e Uma.Tech <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/users\/hamsters\/\" class=\"user_link\">Hamsteri<\/a><\/noindex> <\/i><br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/umatech\/blog\/513010\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041c\u044b \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u043b\u0438 \u043d\u043e\u0432\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u044b, \u0442\u0440\u0430\u0444\u0438\u043a \u0440\u043e\u0441, 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\u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0445 \u0438\u0442\u043e\u0433\u043e\u0432. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043c\u044b \u0440\u0435\u0448\u0438\u043b\u0438 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u043e \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0438 \u043d\u0430\u0448\u0435\u0439 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0437\u0430 \u043f\u044f\u0442\u0438\u043b\u0435\u0442\u043a\u0443 \u043f\u0440\u043e\u0448\u043b\u0430 \u0443\u0434\u0438\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0439 \u043f\u0443\u0442\u044c \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u043c\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":90282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-90281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041c\u044b \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u043b\u0438 \u043d\u043e\u0432\u044b\u0435 \u0441\u0435\u0440\u0432\u0438\u0441\u044b, \u0442\u0440\u0430\u0444\u0438\u043a \u0440\u043e\u0441, \u0437\u0430\u043c\u0435\u043d\u044f\u043b\u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430, \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u043b\u0438 \u043d\u043e\u0432\u044b\u0435 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0438 \u0438 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