{"id":39444,"date":"2019-10-31T22:32:47","date_gmt":"2019-10-31T19:32:47","guid":{"rendered":"https:\/\/prohoster.info\/blog\/programmno-opredelyaemye-shd-ili-chto-pogubilo-dinozavrov\/"},"modified":"2019-10-31T22:32:47","modified_gmt":"2019-10-31T19:32:47","slug":"programmno-opredelyaemye-shd-ili-chto-pogubilo-dinozavrov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/programmno-opredelyaemye-shd-ili-chto-pogubilo-dinozavrov","title":{"rendered":"Sisteme de stocare definite prin software sau ce a distrus dinozaurii?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Sisteme de stocare definite prin software sau ce a distrus dinozaurii?\" src=\"\/wp-content\/uploads\/2019\/10\/f0025d905a860bc582c9f6b41767be55.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOdat\u0103, ei ocupau v\u00e2rful lan\u021bului trofic. Timp de milenii. Apoi a avut loc ceva inimaginabil: cerul s-a acoperit de nori \u0219i ei au \u00eencetat s\u0103 existe. La cealalt\u0103 extremitate a lumii, evenimentele care au schimbat clima au avut loc: umiditatea a crescut. Dinozaurii au devenit prea mari \u0219i prea lent: \u00eencerc\u0103rile lor de a supravie\u021bui erau sortite e\u0219ecului. Pr\u0103d\u0103torii de v\u00e2rf au domnit pe P\u0103m\u00e2nt timp de 100 de milioane de ani, cresc\u00e2nd din ce \u00een ce mai mult \u0219i devenind din ce \u00een ce mai puternici. Au evoluat \u00een ceea ce p\u0103rea a fi crea\u021bia ideal\u0103, aflat\u0103 \u00een v\u00e2rful lan\u021bului trofic, dar Universul a schimbat instantaneu fa\u021ba planetei noastre.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nIronia sor\u021bii este c\u0103 anume norii au \u0219ters din fa\u021ba p\u0103m\u00e2ntului dinozaurii acum 66 de milioane de ani. La fel, norii de ast\u0103zi distrug sistemele tradi\u021bionale de stocare a datelor, care sunt \"la v\u00e2rful lan\u021bului trofic\". \u00cen ambele cazuri, problema nu a fost \u00een \u00eens\u0103\u0219i nori, ci \u00een abilitatea de a se adapta la o lume \u00een schimbare. \u00cen cazul dinozaurilor, totul s-a \u00eent\u00e2mplat rapid: efectul devastator al norilor a ap\u0103rut \u00een decurs de zile sau s\u0103pt\u0103m\u00e2ni de la impactul meteoritului (sau erup\u021bia vulcanului \u2013 alegerea teoriei \u00ee\u021bi apar\u021bine). \u00cen cazul sistemelor tradi\u021bionale de stocare a datelor, procesul dureaz\u0103 ani, dar, desigur, este ireversibil.<\/p>\n<h2>Perioada Triasic\u0103: er\u0103 de mare fier \u0219i apari\u021bia aplica\u021biilor migratoare<\/h2>\n<p>\nCe s-a \u00eent\u00e2mplat deci? \u00cen ecosistemul existent existau sisteme de stocare la nivel de baz\u0103 \u0219i mediu, sisteme de nivel enterprise \u0219i sisteme de stocare direct\u0103 (DAS). Aceste categorii au fost definite de anali\u0219ti, aveau volume de pia\u021b\u0103 proprii, indicatori de cost, fiabilitate, performan\u021b\u0103, scalabilitate. Apoi s-a \u00eent\u00e2mplat ceva ciudat. <\/p>\n<p>Apari\u021bia ma\u0219inilor virtuale a \u00eensemnat c\u0103 pe un singur server puteau rula simultan numeroase aplica\u021bii, probabil din partea mai multor proprietari - aceste schimb\u0103ri au pus imediat sub semnul \u00eentreb\u0103rii viitorul sistemelor de stocare conectate direct. Apoi, proprietarii celor mai mari infrastructuri hiperscalabile (hiperscaleri): Facebook, Google, eBay etc., s\u0103tui s\u0103 pl\u0103teasc\u0103 sume imense pentru sistemele de stocare, au dezvoltat aplica\u021bii proprii care asigurau disponibilitatea datelor pe servere obi\u0219nuite, \u00een loc de mari \u201ecl\u0103diri\u201d pentru stocare. Apoi, compania Amazon a introdus pe pia\u021b\u0103 ceva ciudat numit Simple Storage Service (serviciul simplu de stocare de date) sau S3. Nimic bloc, nimic fi\u0219ier, ci ceva complet nou: era imposibil s\u0103 cumperi un sistem, exist\u00e2nd doar posibilitatea de a cump\u0103ra un serviciu. A\u0219teapt\u0103, ce este acel lumin\u0103 str\u0103lucitoare care se vede pe cer? \u00cenc\u0103 un asteroid?<\/p>\n<h2>Perioada Jurasic\u0103: era \"\u00eentruc\u00e2tva bunelor dinozauri\" <\/h2>\n<p>\nAm intrat \u00eentr-o faz\u0103 de dezvoltare a sistemelor de stocare cu ideologia \u201e\u00eendeajuns de bine\u201d. Clien\u021bii care foloseau aceste sisteme au observat ceea ce au realizat hiperscalerele \u0219i au \u00eenceput s\u0103 conteste justificarea unui adaos de zece sau chiar o sut\u0103 de ori mai mare fa\u021b\u0103 de costul hardware-ului pe care \u00eel pl\u0103tiser\u0103 pentru sistemele lor corporative. Masele de medie au \u00eenceput s\u0103 c\u00e2\u0219tige cot\u0103 de pia\u021b\u0103 de la sistemele de \u00eenalt\u0103 performan\u021b\u0103. Produse precum <noindex><a rel=\"nofollow\" href=\"https:\/\/www.hpe.com\/ru\/ru\/storage\/3par.html\">HPE 3PAR<\/a><\/noindex> au \u00eenregistrat o cre\u0219tere rapid\u0103. EMC Symmetrix, un sistem care domina c\u00e2ndva pia\u021ba corporativ\u0103 (de la cuv\u00e2ntul \u201emasiv\u201d), \u00eenc\u0103 mai p\u0103stra un teritoriu, dar acesta se mic\u0219ora rapid. Mul\u021bi utilizatori au \u00eenceput s\u0103 \u00ee\u0219i transfere datele \u00een AWS.<\/p>\n<p>Pe de alt\u0103 parte, inovatorii din domeniul stoc\u0103rii au \u00eenceput s\u0103 \u00eemprumute idei de la hiperscaleri, folosind tehnologii ale sistemelor distribuite orizontal scalabile - o ideologie opus\u0103 scal\u0103rii verticale. Se a\u0219teapt\u0103 ca noul software pentru stocare s\u0103 poat\u0103 func\u021biona pe servere obi\u0219nuite, exact a\u0219a cum fac hiperscalerele. F\u0103r\u0103 adaosuri de 10-100 de ori peste costul echipamentului \u00een sine. \u00cen teorie, pot fi utilizate orice servere - alegerea depinde de preferin\u021bele tale. Era sistemelor de stocare definite software (SDS) a \u00eenceput: nori au acoperit cerul, temperatura a sc\u0103zut, iar popula\u021bia pr\u0103d\u0103torilor de v\u00e2rf a \u00eenceput s\u0103 scad\u0103.<\/p>\n<h2>Perioada Cretacic\u0103: \u00eenceputul evolu\u021biei sistemelor de stocare definite software <\/h2>\n<p>\nPrimele zile ale stoc\u0103rii definite prin software au fost tumultoase. Se promitea foarte mult, dar se livra pu\u021bin. \u00cen acela\u0219i timp, a avut loc o schimbare tehnologic\u0103 important\u0103: memoria flash a devenit o alternativ\u0103 modern\u0103 la \u201erugina rotativ\u0103\u201d (HDD). A fost o perioad\u0103 de apari\u021bie a numeroaselor startup-uri \u00een domeniul stoc\u0103rii \u0219i de bani de risc u\u0219or distribui\u021bi. Totul ar fi fost minunat, dac\u0103 nu exista o problem\u0103: stocarea datelor necesit\u0103 o aten\u021bie serioas\u0103. S-a dovedit c\u0103 clien\u021bilor le pas\u0103 de datele lor. Dac\u0103 pierd accesul la acestea sau se descoper\u0103 c\u00e2\u021biva bi\u021bi gre\u0219i\u021bi \u00een terabytes de date, se \u00eengrijoreaz\u0103 \u0219i se \u00eengrijoreaz\u0103 foarte tare. Majoritatea startup-urilor nu au supravie\u021buit. Clien\u021bii au primit func\u021bionalit\u0103\u021bi uimitoare, dar nu totul era bine cu instrumentele de baz\u0103. O re\u021bet\u0103 proast\u0103.<\/p>\n<h2>Perioada cenozoic\u0103: array-urile de stocare domin\u0103<\/h2>\n<p>\nPu\u021bini vorbesc despre ce s-a \u00eent\u00e2mplat dup\u0103, deoarece nu este foarte interesant - clien\u021bii continu\u0103 s\u0103 cumpere acelea\u0219i array-uri clasice de stocare. Desigur, cei care \u0219i-au mutat aplica\u021biile \u00een cloud au mutat acolo \u0219i datele. Dar pentru majoritatea cov\u00e2r\u0219itoare a clien\u021bilor, care nu doresc s\u0103 migreze complet \u00een cloud sau s\u0103 nu migreze deloc, aceea\u0219i Hewlett Packard Enterprise a continuat s\u0103 ofere array-uri clasice.<\/p>\n<p>Tr\u0103im \u00een anul 2019, a\u0219a c\u0103 de ce mai exist\u0103 un business de miliarde de dolari bazat pe tehnologii din vremurile Y2K? Pentru c\u0103 func\u021bioneaz\u0103! Pe scurt, cerin\u021bele aplica\u021biilor critice nu au fost \u00eendeplinite de produsele create pe valul hype-ului. Produse precum HPE 3PAR au r\u0103mas cele mai bune op\u021biuni pentru clien\u021bii enterprise, iar noul val de evolu\u021bie al arhitecturii HPE 3PAR - <noindex><a rel=\"nofollow\" href=\"https:\/\/www.hpe.com\/ru\/ru\/storage\/hpe-primera.html\">HPE Primera<\/a><\/noindex> \u2013 doar confirm\u0103 acest lucru.<\/p>\n<p>\u00cen schimb, capacit\u0103\u021bile stoc\u0103rii definite prin software au fost excelente: scalabilitate orizontal\u0103, utilizarea serverelor standard... Dar pre\u021bul pentru aceasta a fost: disponibilitate instabil\u0103, performan\u021b\u0103 imprevizibil\u0103 \u0219i reguli specifice de scalabilitate. <\/p>\n<p>Dificultatea cerin\u021belor clien\u021bilor const\u0103 \u00een faptul c\u0103 acestea nu devin niciodat\u0103 mai simple. Nimeni nu va spune c\u0103 pierderea integrit\u0103\u021bii datelor sau cre\u0219terea timpului de nefunc\u021bionare sunt acceptabile. De aceea, arhitectura este at\u00e2t de important\u0103 pentru stocarea de date, fiindc\u0103 trebuie s\u0103 r\u0103spund\u0103 cerin\u021belor centrelor de date care evolueaz\u0103 rapid \u0219i s\u0103 nu compromit\u0103 caracteristicile cheie ale unui sistem de stocare de date de nivel profesional.<\/p>\n<h2>Perioada ter\u021biar\u0103: apari\u021bia unor forme noi de via\u021b\u0103<\/h2>\n<p>\nS\u0103 \u00eencerc\u0103m s\u0103 \u00een\u021belegem cum a reu\u0219it una dintre noile companii pe pia\u021ba sistemelor de stocare de date \u2013 Datera \u2013 s\u0103 fac\u0103 fa\u021b\u0103 acestei combina\u021bii dificile de cerin\u021be istorice \u0219i noi. \u00cen primul r\u00e2nd, prin implementarea unei arhitecturi orientate spre rezolvarea dilemei descrise mai sus. Nu este posibil s\u0103 modifici o arhitectur\u0103 veche pentru a rezolva problemele cu care se confrunt\u0103 un centru de date modern, la fel cum nu po\u021bi modifica arhitectura unui sistem de stocare software-definit pentru a satisface cerin\u021bele impuse sistemelor de clas\u0103 enterprise: dinozaurii nu au devenit mamifere doar pentru c\u0103 temperatura a sc\u0103zut. <\/p>\n<p>Construirea unei solu\u021bii care s\u0103 corespund\u0103 cerin\u021belor sistemelor de stocare de nivel enterprise \u0219i s\u0103 \u021bin\u0103 cont de toat\u0103 valoarea dinamicii unui centru de date modern reprezint\u0103 o sarcin\u0103 complicat\u0103, dar acesta a fost exact ceea ce Datera \u0219i-a propus s\u0103 fac\u0103. Speciali\u0219tii de la Datera au lucrat la asta timp de cinci ani \u0219i au g\u0103sit re\u021beta pentru 'g\u0103tirea' unui sistem de stocare de date software-definit de nivel enterprise.<\/p>\n<p>Principala dificultate \u00eent\u00e2lnit\u0103 de Datera a fost utilizarea operatorului logic 'AND' \u00een locul mai simplului 'OR'. Disponibilitate stabil\u0103, 'AND' performan\u021b\u0103 previzibil\u0103, 'AND' scalabilitate arhitectural\u0103, 'AND' orchestrare ca cod, 'AND' echipamente standardizate, 'AND' implementarea politicilor de gestionare, 'AND' flexibilitate, 'AND' management bazat pe analiz\u0103, 'AND' securitate, 'AND' integrare cu ecosisteme deschise. Operatorul logic 'AND' este cu un caracter mai lung dec\u00e2t 'OR' \u2013 aceasta este principala diferen\u021b\u0103.<\/p>\n<h2>Perioada cvaternar\u0103: centrele de date moderne \u0219i schimb\u0103rile bru\u0219te ale climei predetermina dezvoltarea sistemelor de stocare software-definite<\/h2>\n<p>\nCum a creat Datera o arhitectur\u0103 care s\u0103 \u00eendeplineasc\u0103 cerin\u021bele stoc\u0103rii enterprise tradi\u021bionale \u0219i s\u0103 satisfac\u0103 \u00een acela\u0219i timp solicit\u0103rile unui centru de date modern? Totul revine din nou la acest operator enervant \u201e\u0218I\u201d.<\/p>\n<p>Nu avea sens s\u0103 rezolv\u0103m una c\u00e2te una problemele legate de cerin\u021be specifice. Suma acestor elemente nu va deveni un \u00eentreg. Ca \u00een orice sistem complex, a fost important\u0103 elaborarea atent\u0103 a \u00eentregii game de compromisuri echilibrate. \u00cen timpul dezvolt\u0103rii, speciali\u0219tii de la Datera s-au bazat pe trei principii fundamentale:<\/p>\n<ul>\n<li>gestionarea conform specificului aplica\u021biilor;<\/li>\n<li>un mecanism unic de asigurare a flexibilit\u0103\u021bii datelor;<\/li>\n<li>\u00eenalte performan\u021be prin costuri reduse.<\/li>\n<\/ul>\n<p>\nProprietatea comun\u0103 a acestor principii este simplitatea. Gestionarea simpl\u0103 a sistemului, gestionarea simpl\u0103 a datelor printr-un mecanism elegant unic \u0219i asigurarea unei performan\u021be predictibile (\u0219i ridicate) prin reducerea costurilor. De ce este at\u00e2t de important\u0103 simplitatea? Me\u0219terii experimenta\u021bi din domeniul stoc\u0103rii \u0219tiu c\u0103 nu se pot \u00eendeplini cerin\u021bele pentru stocarea modern\u0103 a datelor \u00eentr-un centru de date dinamic doar prin management granular, folosind numeroase instrumente de gestionare a datelor \u0219i hiper-optimizarea pentru cre\u0219terea performan\u021bei. Complexitatea acestor tehnici ne este deja familiar\u0103 sub numele de dinosaurul stoc\u0103rii.<\/p>\n<p>Familiarizarea cu aceste principii a fost de mare ajutor pentru Datera. Arhitectura dezvoltat\u0103 de ei are, pe de o parte, disponibilitate, performan\u021b\u0103 \u0219i scalabilitate specific\u0103 stoc\u0103rii enterprise moderne, iar pe de alt\u0103 parte, flexibilitatea \u0219i viteza necesare pentru un centru de date modern definitoriu prin software.<\/p>\n<h2>Disponibilitatea Datera \u00een Rom\u00e2nia<\/h2>\n<p>\nDatera este un partener tehnologic global al Hewlett Packard Enterprise. Produsele Datera au fost testate pentru compatibilitate \u0219i performan\u021b\u0103 cu diferite modele de servere <noindex><a rel=\"nofollow\" href=\"https:\/\/www.hpe.com\/ru\/ru\/product-catalog\/servers\/proliant-servers.hits-12.html\">HPE ProLiant<\/a><\/noindex>.<\/p>\n<p>Mai multe detalii despre arhitectura Datera pute\u021bi ob\u021bine la <noindex><a rel=\"nofollow\" href=\"https:\/\/bit.ly\/2MVg2d2\">webinarul HPE<\/a><\/noindex> 31 octombrie.<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/hpe\/blog\/472840\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u0433\u0434\u0430-\u0442\u043e \u043e\u043d\u0438 \u0437\u0430\u043d\u0438\u043c\u0430\u043b\u0438 \u0432\u0435\u0440\u0448\u0438\u043d\u0443 \u043f\u0438\u0449\u0435\u0432\u043e\u0439 \u0446\u0435\u043f\u043e\u0447\u043a\u0438. \u0422\u044b\u0441\u044f\u0447\u0435\u043b\u0435\u0442\u0438\u044f\u043c\u0438. \u0410 \u043f\u043e\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c \u043d\u0435\u043c\u044b\u0441\u043b\u0438\u043c\u043e\u0435: \u043d\u0435\u0431\u043e \u0437\u0430\u043a\u0440\u044b\u043b\u0438 \u043e\u0431\u043b\u0430\u043a\u0430, \u0438 \u043e\u043d\u0438 \u043f\u0435\u0440\u0435\u0441\u0442\u0430\u043b\u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043e\u0432\u0430\u0442\u044c. \u041d\u0430 \u0434\u0440\u0443\u0433\u043e\u043c \u043a\u043e\u043d\u0446\u0435 \u0441\u0432\u0435\u0442\u0430 \u043f\u0440\u043e\u0438\u0437\u043e\u0448\u043b\u0438 \u0441\u043e\u0431\u044b\u0442\u0438\u044f, \u0438\u0437\u043c\u0435\u043d\u0438\u0432\u0448\u0438\u0435 \u043a\u043b\u0438\u043c\u0430\u0442: \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u043b\u0430\u0441\u044c \u043e\u0431\u043b\u0430\u0447\u043d\u043e\u0441\u0442\u044c. \u0414\u0438\u043d\u043e\u0437\u0430\u0432\u0440\u044b \u0441\u0442\u0430\u043b\u0438 \u0441\u043b\u0438\u0448\u043a\u043e\u043c \u0431\u043e\u043b\u044c\u0448\u0438\u043c\u0438 \u0438 \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u044b\u043c\u0438: \u0438\u0445 \u043f\u043e\u043f\u044b\u0442\u043a\u0438 \u0432\u044b\u0436\u0438\u0442\u044c \u0431\u044b\u043b\u0438 \u043e\u0431\u0440\u0435\u0447\u0435\u043d\u044b \u043d\u0430 \u043f\u0440\u043e\u0432\u0430\u043b. \u0412\u044b\u0441\u0448\u0438\u0435 \u0445\u0438\u0449\u043d\u0438\u043a\u0438 \u043f\u0440\u0430\u0432\u0438\u043b\u0438 \u043d\u0430 \u0417\u0435\u043c\u043b\u0435 100 \u043c\u0438\u043b\u043b\u0438\u043e\u043d\u043e\u0432 \u043b\u0435\u0442, \u0432\u044b\u0440\u0430\u0441\u0442\u0430\u044f \u0432\u0441\u0451 \u0431\u043e\u043b\u044c\u0448\u0435 \u0438 \u0441\u0442\u0430\u043d\u043e\u0432\u044f\u0441\u044c \u0432\u0441\u0451 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":39445,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-39444","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=\"\u041a\u043e\u0433\u0434\u0430-\u0442\u043e \u043e\u043d\u0438 \u0437\u0430\u043d\u0438\u043c\u0430\u043b\u0438 \u0432\u0435\u0440\u0448\u0438\u043d\u0443.\" \/>\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\/ro\/blog\/administrirovanie\/programmno-opredelyaemye-shd-ili-chto-pogubilo-dinozavrov\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"ro_RO\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u043c\u044b\u0435 \u0421\u0425\u0414 \u0438\u043b\u0438 \u0447\u0442\u043e \u043f\u043e\u0433\u0443\u0431\u0438\u043b\u043e \u0434\u0438\u043d\u043e\u0437\u0430\u0432\u0440\u043e\u0432? 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