{"id":87814,"date":"2020-07-10T13:42:14","date_gmt":"2020-07-10T11:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/chto-luchshe-oracle-ili-redis-ili-kak-obosnovat-vybor-platformy"},"modified":"2020-07-10T13:42:14","modified_gmt":"2020-07-10T11:42:14","slug":"chto-luchshe-oracle-ili-redis-ili-kak-obosnovat-vybor-platformy","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/chto-luchshe-oracle-ili-redis-ili-kak-obosnovat-vybor-platformy","title":{"rendered":"Ce este mai bine \u2013 Oracle sau Redis sau Cum s\u0103 justifici alegerea platformei","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<blockquote><p>\u2013 Trebuie s\u0103 recunosc, \u2013 a spus ea tare, f\u0103r\u0103 a se adresa cuiva. \u2013 Trebuie s\u0103 recunosc! Este scris clar \u2013 principala sarcin\u0103 a societ\u0103\u021bii este ob\u021binerea de profit \u00een interesul ac\u021bionarilor. G\u00e2ndi\u021bi-v\u0103! Nu le este fric\u0103 de nimic!<\/p>\n<p><i>Iulii Dubov, \u201eR\u0103ul mai mic\u201d<\/i><\/p><\/blockquote>\n<p>\nV\u0103z\u00e2nd un astfel de titlu, cu siguran\u021b\u0103 a\u021bi decis deja c\u0103 articolul este fie o prostie, fie o provocare. Dar nu v\u0103 gr\u0103bi\u021bi s\u0103 trasa\u021bi concluzii: angaja\u021bilor corpora\u021biilor mari, \u00een special celor de stat, le este adesea necesar s\u0103 compare diferite platforme, inclusiv complet diferite \u2013 de exemplu, cele men\u021bionate \u00een titlu.<\/p>\n<p><img decoding=\"async\" alt=\"Ce este mai bine \u2013 Oracle sau Redis sau Cum s\u0103 justifici alegerea platformei\" src=\"\/wp-content\/uploads\/2020\/07\/6b0c0a3a60794b2a9e98733e59eec6da.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDesigur, nimeni nu compar\u0103 DBMS-uri, c\u0103ci punctele lor forte \u0219i slabe sunt bine cunoscute. De obicei, sunt comparate platforme care rezolv\u0103 o anumit\u0103 sarcin\u0103 aplicativ\u0103. \u00cen acest articol, voi ar\u0103ta metoda utilizat\u0103 \u00een acest caz, folosind baza de date ca subiect, bine cunoscut cititorilor de pe Habr. A\u0219adar,<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h4>Motiva\u021bia<\/h4>\n<p>\nC\u00e2nd \u00eencepe\u021bi un proiect educa\u021bional sau un hobby, motiva\u021bia pentru alegerea platformei poate fi variat\u0103: \u201ecuno\u0219tin\u021bele mele despre aceast\u0103 platform\u0103 sunt cele mai bune\u201d, \u201e\u00eemi face pl\u0103cere s\u0103 m\u0103 l\u0103muresc cu aceasta\u201d, \u201eaici e cea mai bun\u0103 documenta\u021bie\u201d\u2026 \u00cen cazul unei companii comerciale, criteriul de alegere este unul singur: c\u00e2t trebuie s\u0103 pl\u0103tesc \u0219i ce voi ob\u021bine pentru ace\u0219ti bani.<\/p>\n<p>Evident, dorim s\u0103 pl\u0103tim mai pu\u021bin \u0219i s\u0103 ob\u021binem mai mult. Cu toate acestea, trebuie s\u0103 decid\u0103 ce este mai important \u2013 s\u0103 pl\u0103tesc mai pu\u021bin sau s\u0103 primesc mai mult, \u0219i s\u0103 aloc\u0103m un punctaj fiec\u0103rui nod. S\u0103 presupunem c\u0103 pentru noi este mai important\u0103 solu\u021bia de calitate, dec\u00e2t cea ieftin\u0103, \u0219i astfel atribuim nodului \u201eCost\u201d un punctaj de 40%, iar nodului \u201eFunc\u021bionalit\u0103\u021bi\u201d \u2013 60%.<\/p>\n<p><img decoding=\"async\" alt=\"Ce este mai bine \u2013 Oracle sau Redis sau Cum s\u0103 justifici alegerea platformei\" src=\"\/wp-content\/uploads\/2020\/07\/b3ba842198428e7de98f3b5a27591d43.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u00cen corpora\u021biile mari, de obicei, totul este invers \u2013 punctajul costului nu scade sub 50%, iar poate fi chiar mai mult de 60%. \u00cen exemplul model, este important doar c\u0103 suma punctajelor nodurilor copil ale oric\u0103rui nod p\u0103rinte trebuie s\u0103 fie 100%.<\/p>\n<h4>Criterii de excluziune<\/h4>\n<p>\nSite-ului <noindex><a rel=\"nofollow\" href=\"https:\/\/db-engines.com\/\">db-engines.com<\/a><\/noindex> sunt cunoscute aproximativ 500 de sisteme de gestionare a bazelor de date. Evident, dac\u0103 alegi o platform\u0103 \u021bint\u0103 dintr-un asemenea num\u0103r de op\u021biuni, poate ie\u0219i un articol de revizuire, dar nu un proiect comercial. Pentru a restr\u00e2nge spa\u021biul de alegere, se formuleaz\u0103 criterii de excludere, iar dac\u0103 platforma nu \u00eendepline\u0219te aceste criterii, atunci nu este considerat\u0103.<\/p>\n<p>Criteriile de excluziune pot \u021bine de caracteristicile tehnologice, de exemplu:<\/p>\n<ul>\n<li>Garan\u021bii ACID;<\/li>\n<li>model rela\u021bional de date;<\/li>\n<li>suport pentru limba SQL (re\u021bine\u021bi c\u0103 nu este acela\u0219i lucru cu \u00abmodelul rela\u021bional\u00bb);<\/li>\n<li>capacitate de scalare orizontal\u0103.<\/li>\n<\/ul>\n<p>\nPot exista criterii generale:<\/p>\n<ul>\n<li>existen\u021ba suportului comercial \u00een Rusia;<\/li>\n<li>cod surs\u0103 deschis;<\/li>\n<li>existen\u021ba platformei \u00een Registrul Ministerului Comunica\u021biilor;<\/li>\n<li>existen\u021ba platformei \u00eentr-un clasament (de exemplu, \u00een prima sut\u0103 a clasamentului db-engines.com);<\/li>\n<li>existen\u021ba exper\u021bilor pe pia\u021b\u0103 (de exemplu, dup\u0103 rezultatele c\u0103ut\u0103rii denumirii platformei \u00een CV-uri pe site-ul hh.ru).<\/li>\n<\/ul>\n<p>\n\u00cen cele din urm\u0103, pot exista criterii specifice \u00eentreprinderii:<\/p>\n<ul>\n<li>existen\u021ba speciali\u0219tilor \u00een echip\u0103;<\/li>\n<li>compatibilitate cu sistemul de monitorizare X sau cu sistemul de backup Y, pe care se bazeaz\u0103 tot suportul\u2026<\/li>\n<\/ul>\n<p>\nCel mai important este ca lista criteriilor eliminatorii s\u0103 existe. Altfel, cu siguran\u021b\u0103 va ap\u0103rea un expert (sau un \u00abexpert\u00bb) care se bucur\u0103 de o mare \u00eencredere \u00een r\u00e2ndul conduc\u0103torilor, care va spune \u00abde ce nu a\u021bi ales platforma Z, \u0219tiu c\u0103 este cea mai bun\u0103\u00bb. <\/p>\n<h4>Evaluarea costului<\/h4>\n<p>\nCostul solu\u021biei este evident format din costul licen\u021belor, costul asisten\u021bei \u0219i costul echipamentului.<\/p>\n<p>Dac\u0103 sistemele sunt aproximativ de aceea\u0219i clas\u0103 (de exemplu, Microsoft SQL Server \u0219i PostgreSQL), atunci, pentru simplitate, se poate considera c\u0103 cantitatea de echipament pentru ambele solu\u021bii va fi aproximativ aceea\u0219i. Acest lucru va permite evitarea evalu\u0103rii echipamentului, economisind astfel mult timp \u0219i efort. Dac\u0103, \u00eens\u0103, trebuie s\u0103 compari sisteme complet diferite (s\u0103 zicem, Oracle vs. Redis), este evident c\u0103 pentru o evaluare corect\u0103 este necesar\u0103 realizarea unui sizing (calculul cantit\u0103\u021bii de echipament). Sizingul unei sisteme inexistente este o activitate destul de nerecunosc\u0103toare, prin urmare, se \u00eencearc\u0103 \u00een general s\u0103 se evite astfel de compara\u021bii. Este simplu: \u00een condi\u021biile eliminatorii se specific\u0103 pierdere zero de date \u0219i model rela\u021bional sau, dimpotriv\u0103, o sarcin\u0103 de 50 de mii de tranzac\u021bii pe secund\u0103.<\/p>\n<p>Pentru a evalua licen\u021bele, este suficient s\u0103 solicita\u021bi de la furnizor sau partenerii s\u0103i pre\u021bul licen\u021bei pentru un num\u0103r fix de nuclee \u0219i suport pentru o perioad\u0103 fix\u0103. De obicei, companiile au deja rela\u021bii consolidate cu furnizorii de software, iar dac\u0103 departamentul de exploatare a bazelor de date nu poate r\u0103spunde la \u00eentrebare, pentru a ob\u021bine aceast\u0103 informa\u021bie este suficient\u0103 o scrisoare.<\/p>\n<p>Furnizorii pot avea metrici diferite pentru licen\u021biere: \u00een func\u021bie de num\u0103rul de nuclee, volumul de date sau num\u0103rul de noduri. O baz\u0103 de date standby poate fi gratuit\u0103 sau poate fi licen\u021biat\u0103 la fel ca cea principal\u0103. Dac\u0103 au fost identificate diferen\u021be \u00een metrici, va fi necesar s\u0103 descrie\u021bi detaliat modelul standului \u0219i s\u0103 calcula\u021bi costul licen\u021belor pentru stand.<\/p>\n<p>Un aspect important pentru o compara\u021bie corect\u0103 este condi\u021biile egale de suport. De exemplu, suportul Oracle cost\u0103 22% din pre\u021bul licen\u021bei pe an, \u00een timp ce pentru suportul PostgreSQL nu se percepe nimic. Este corect s\u0103 compar\u0103m astfel? Nu, deoarece consecin\u021bele unei erori care nu poate fi rezolvat\u0103 prin for\u021be proprii sunt complet diferite: \u00een primul caz, speciali\u0219tii de suport vor ajuta rapid la solu\u021bionarea acesteia, iar \u00een al doilea caz exist\u0103 riscul \u00eent\u00e2rzierii proiectului sau a opririi unui sistem final pentru o perioad\u0103 nedefinit\u0103.<\/p>\n<p>Pute\u021bi uniformiza condi\u021biile de calcul \u00een trei moduri:<\/p>\n<ol>\n<li>Folosind Oracle f\u0103r\u0103 suport (\u00een realitate, a\u0219a ceva nu exist\u0103).<\/li>\n<li>Cump\u0103r\u00e2nd suport pentru PostgreSQL \u2013 de exemplu, de la compania Postgres Professional.<\/li>\n<li>Includ\u00e2nd \u00een calcul riscurile asociate cu lipsa suportului.<\/li>\n<\/ol>\n<p>\nDe exemplu, calculul riscurilor poate ar\u0103ta astfel: \u00een cazul unei defec\u021biuni iremediabile a bazei de date, oprirea sistemului va dura 1 zi lucr\u0103toare. Profitul estimat din utilizarea sistemului este de 40 miliarde tugriki mongole pe an, iar frecven\u021ba defec\u021biunilor este evaluat\u0103 la 1\/400, astfel, riscul lipsei de suport este estimat la aproximativ 100 milioane tugriki mongole pe an. Este evident c\u0103 \u201eprofitul estimat\u201d \u0219i \u201efrecv. estimat\u0103 de defec\u021biuni\u201d sunt valori virtuale, dar este mult mai bine s\u0103 ave\u021bi un astfel de model dec\u00e2t s\u0103 nu ave\u021bi deloc.<\/p>\n<p>\u00cen realitate, sistemul poate fi esen\u021bial, iar pierderile de reputa\u021bie cauzate de un timp de nefunc\u021bionare \u00eendelungat ar fi inacceptabile, a\u0219a c\u0103 suportul va fi necesar. Dac\u0103 \u00eentreruperea este permis\u0103, renun\u021barea la suport poate fi uneori o modalitate bun\u0103 de a economisi.<\/p>\n<p>S\u0103 presupunem c\u0103, dup\u0103 toate calculele, costul de operare al platformei A timp de 5 ani a fost de 800 milioane tugriki mongolezi, costul de operare al platformei B \u2013 650 milioane tugriki, iar costul de operare al platformei C \u2013 600 milioane tugriki. Platforma C, ca \u00eenving\u0103toare, prime\u0219te un punct complet pentru cost, iar platformele A \u0219i B primesc pu\u021bin mai pu\u021bin, propor\u021bional cu c\u00e2t sunt mai scumpe. \u00cen acest caz \u2013 0.75 \u0219i 0.92 puncte, respectiv.<\/p>\n<h4>Evaluarea capacit\u0103\u021bilor<\/h4>\n<p>\nEvaluarea capacit\u0103\u021bilor se \u00eemparte \u00een numeroase grupuri, num\u0103rul lor fiind limitat doar de imagina\u021bia celui care face evaluarea. O variant\u0103 optim\u0103 pare a fi \u00eemp\u0103r\u021birea capacit\u0103\u021bilor \u00een func\u021bie de echipele care le vor utiliza; \u00een exemplul nostru, acestea sunt dezvoltatorii, administratorii \u0219i ofi\u021berii de securitate a informa\u021biei. S\u0103 presupunem c\u0103 greut\u0103\u021bile acestor func\u021bii sunt distribuite astfel: 40:40:20.<\/p>\n<p>Func\u021biile de dezvoltare includ:<\/p>\n<ul>\n<li>u\u0219urin\u021ba \u00een manipularea datelor;<\/li>\n<li>scalabilitate;<\/li>\n<li>disponibilitatea indicilor secundari.<\/li>\n<\/ul>\n<p>\nLista criteriilor, precum \u0219i greut\u0103\u021bile acestora, sunt foarte subiective. Chiar \u0219i atunci c\u00e2nd se rezolv\u0103 aceea\u0219i problem\u0103, aceste liste, greut\u0103\u021bile punctelor \u0219i r\u0103spunsurile vor varia semnificativ \u00een func\u021bie de compozi\u021bia echipei dumneavoastr\u0103. De exemplu, Facebook utilizeaz\u0103 MySQL pentru stocarea datelor, \u00een timp ce Instagram este bazat pe Cassandra. Este pu\u021bin probabil ca dezvoltatorii acestor aplica\u021bii s\u0103 fi completat astfel de tabeluri. Se poate doar specula c\u0103 Mark Zuckerberg a ales un model rela\u021bional complet, pl\u0103tind pentru aceasta cu necesitatea sharding-ului aplica\u021bional, \u00een timp ce Kevin Systrom a construit scalabilitatea folosind capacit\u0103\u021bile platformei, sacrific\u00e2nd u\u0219urin\u021ba accesului la date.<\/p>\n<p>Func\u021biile de administrare includ:<\/p>\n<ul>\n<li>capacit\u0103\u021bile sistemului de backup;<\/li>\n<li>u\u0219urin\u021ba monitoriz\u0103rii;<\/li>\n<li>u\u0219urin\u021ba \u00een gestionarea resurselor \u2013 discuri \u0219i noduri;<\/li>\n<li>capacit\u0103\u021bile de replicare a datelor.<\/li>\n<\/ul>\n<p>\nRe\u021bine\u021bi c\u0103 formul\u0103rile \u00eentreb\u0103rilor trebuie s\u0103 permit\u0103 evaluarea cantitativ\u0103. Pute\u021bi chiar s\u0103 conveni\u021bi asupra modului de evaluare a unei anumite func\u021bii. S\u0103 \u00eencerc\u0103m, de exemplu, s\u0103 evalu\u0103m instrumentele de backup utiliz\u00e2nd instrumentele furnizate cu SGBD-ul Oracle:<\/p>\n<p>Instrument<br \/>\nComentariu<br \/>\nEvaluare<\/p>\n<p>imp\/exp<br \/>\nExport \u0219i import de date<br \/>\n0.1<\/p>\n<p>backup \u00eencepere\/\u00eencheiere<br \/>\nCopiere de fi\u0219iere<br \/>\n0.3<\/p>\n<p>RMAN<br \/>\nPosibilitatea copiei incremental\u0103<br \/>\n0.7<\/p>\n<p>ZDLRA<br \/>\nNumai copie incremental\u0103, recuperare rapid\u0103 la punctul de salvare<br \/>\n1.0<\/p>\n<p>\nDac\u0103 nu exist\u0103 criterii clare de evaluare, este bine s\u0103 cere\u021bi mai multor exper\u021bi s\u0103 ofere evalu\u0103ri, iar apoi s\u0103 le media\u021bi.<\/p>\n<p>\u00cen final, s\u0103 enumer\u0103m func\u021biile de securitate informa\u021bional\u0103:<\/p>\n<ul>\n<li>existen\u021ba politicilor de gestionare a parolelor;<\/li>\n<li>posibilitatea conect\u0103rii unor sisteme externe de autentificare (LDAP, Kerberos);<\/li>\n<li>model de acces pe baz\u0103 de roluri;<\/li>\n<li>abilit\u0103\u021bi de audit;<\/li>\n<li>criptarea datelor pe disc;<\/li>\n<li>criptarea \u00een timpul transmisiei prin re\u021bea (TLS);<\/li>\n<li>protec\u021bia datelor de c\u0103tre administrator.<\/li>\n<\/ul>\n<p><\/p>\n<h4>Testarea performan\u021bei<\/h4>\n<p>\nA\u0219 dori s\u0103 v\u0103 avertizez \u00een mod special s\u0103 nu folosi\u021bi ca argumente rezultatele unor teste de sarcin\u0103 efectuate de altele.<\/p>\n<p>\u00cen primul r\u00e2nd, structura datelor \u0219i profilul de sarcin\u0103 al aplica\u021biilor testate pot diferi semnificativ de sarcina pe care inten\u021biona\u021bi s\u0103 o rezolva\u021bi. Cu 10-15 ani \u00een urm\u0103, produc\u0103torii de baze de date \u00ee\u0219i etalau adesea rezultatele ob\u021binute \u00een teste TPC, dar acum pare c\u0103 nimeni nu ia \u00een serios aceste rezultate.<\/p>\n<p>\u00cen al doilea r\u00e2nd, performan\u021ba sistemului depinde destul de mult de platforma pentru care a fost scris ini\u021bial codul \u0219i de echipamentul pe care a fost efectuat testul. Am v\u0103zut numeroase teste \u00een care Oracle era comparat cu PostgreSQL. Rezultatele variau de la superioritatea incontestabil\u0103 a unei sisteme la aceea\u0219i superioritate a celeilalte.<\/p>\n<p>\u0218i \u00een sf\u00e2r\u0219it, \u00een al treilea r\u00e2nd, nu \u0219ti\u021bi nimic despre cine a efectuat testul. Este important at\u00e2t calificarea, care influen\u021beaz\u0103 calitatea configur\u0103rii sistemului de operare \u0219i a platformei, c\u00e2t \u0219i motiva\u021bia, care afecteaz\u0103 rezultatele testului mai mult dec\u00e2t toate celelalte factori la un loc.<\/p>\n<p>Dac\u0103 performan\u021ba este un factor critic, efectua\u021bi testul singur, de preferat cu implicarea speciali\u0219tilor care vor configura \u0219i \u00eentre\u021bine un sistem industrial.<\/p>\n<h4>Rezultatul<\/h4>\n<p>\n\u00cen cele din urm\u0103, rezultatul \u00eentregii munci ar trebui s\u0103 fie un tabel electronic \u00een care toate evalu\u0103rile sunt consolidate, \u00eenmul\u021bite \u0219i sumate:<\/p>\n<p><img decoding=\"async\" alt=\"Ce este mai bine \u2013 Oracle sau Redis sau Cum s\u0103 justifici alegerea platformei\" src=\"\/wp-content\/uploads\/2020\/07\/760bfe92d02865ec27ab6ac28d64e855.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDup\u0103 cum \u00een\u021belege\u021bi, prin modificarea greut\u0103\u021bilor \u0219i ajustarea evalu\u0103rilor se poate ob\u021bine orice rezultat dorit, dar aceasta este o alt\u0103 poveste...<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/510176\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u2013\u00a0\u042d\u0442\u043e \u0436 \u043d\u0430\u0434\u043e,\u00a0\u2014 \u043d\u0438 \u043a \u043a\u043e\u043c\u0443 \u043d\u0435 \u043e\u0431\u0440\u0430\u0449\u0430\u044f\u0441\u044c, \u0433\u0440\u043e\u043c\u043a\u043e \u0441\u043a\u0430\u0437\u0430\u043b\u0430 \u043e\u043d\u0430.\u00a0\u2013 \u042d\u0442\u043e \u0436 \u043d\u0430\u0434\u043e! \u0422\u0430\u043a \u043f\u0440\u044f\u043c\u043e \u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u043e \u2013 \u0433\u043b\u0430\u0432\u043d\u043e\u0439 \u0437\u0430\u0434\u0430\u0447\u0435\u0439 \u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u0431\u044b\u043b\u0438 \u0432\u00a0\u0438\u043d\u0442\u0435\u0440\u0435\u0441\u0430\u0445 \u0430\u043a\u0446\u0438\u043e\u043d\u0435\u0440\u043e\u0432. \u041d\u0443 \u0432\u044b \u043f\u043e\u0434\u0443\u043c\u0430\u0439\u0442\u0435! \u041d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u0431\u043e\u044f\u0442\u0441\u044f! \u042e\u043b\u0438\u0439 \u0414\u0443\u0431\u043e\u0432, \u00ab\u041c\u0435\u043d\u044c\u0448\u0435\u0435 \u0437\u043b\u043e\u00bb \u0423\u0432\u0438\u0434\u0435\u0432 \u0442\u0430\u043a\u043e\u0439 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a, \u0432\u044b \u043d\u0430\u0432\u0435\u0440\u043d\u044f\u043a\u0430 \u0443\u0436\u0435 \u0440\u0435\u0448\u0438\u043b\u0438, \u0447\u0442\u043e \u0441\u0442\u0430\u0442\u044c\u044f \u2013 \u0438\u043b\u0438 \u0433\u043b\u0443\u043f\u043e\u0441\u0442\u044c, \u0438\u043b\u0438 \u043f\u0440\u043e\u0432\u043e\u043a\u0430\u0446\u0438\u044f. \u041d\u043e \u043d\u0435 \u0441\u043f\u0435\u0448\u0438\u0442\u0435 \u0441 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":87815,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-87814","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u2013 \u042d\u0442\u043e \u0436 \u043d\u0430\u0434\u043e, \u2014 \u043d\u0438 \u043a \u043a\u043e\u043c\u0443 \u043d\u0435 \u043e\u0431\u0440\u0430\u0449\u0430\u044f\u0441\u044c, \u0433\u0440\u043e\u043c\u043a\u043e \u0441\u043a\u0430\u0437\u0430\u043b\u0430 \u043e\u043d\u0430. \u2013 \u042d\u0442\u043e \u0436 \u043d\u0430\u0434\u043e! 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