{"id":105025,"date":"2022-09-05T21:36:50","date_gmt":"2022-09-05T19:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlena-raspredelyonnaya-operaczionnaya-sistema-dbos-rabotayushhaya-poverh-subd"},"modified":"2022-09-05T21:36:50","modified_gmt":"2022-09-05T19:36:50","slug":"predstavlena-raspredelyonnaya-operaczionnaya-sistema-dbos-rabotayushhaya-poverh-subd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/predstavlena-raspredelyonnaya-operaczionnaya-sistema-dbos-rabotayushhaya-poverh-subd","title":{"rendered":"Predstaven\u00fd je distribuovan\u00fd opera\u010dn\u00fd syst\u00e9m DBOS, ktor\u00fd funguje na vrchu datab\u00e1zov\u00e9ho syst\u00e9mu.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Predstaven\u00fd projekt DBOS (DBMS-oriented Operating System) vyv\u00edja nov\u00fa opera\u010dn\u00fa s\u00fastavu pre vykon\u00e1vanie \u0161k\u00e1lovate\u013en\u00fdch distribuovan\u00fdch aplik\u00e1ci\u00ed. Charakteristickou \u010drtou projektu je pou\u017eitie S\u00daBD na ukladanie aplik\u00e1ci\u00ed a stavu syst\u00e9mu, ako aj organiz\u00e1cia pr\u00edstupu k stavu iba cez transakcie. Projekt vyv\u00edjaj\u00fa v\u00fdskumn\u00edci z Massachusettsk\u00e9ho technologick\u00e9ho in\u0161tit\u00fatu, Wisconsinskej a Stanfordovej univerzity, univerzity Carnegie Mellon a firiem Google a VMware. V\u00fdsledky sa \u0161\u00edria pod licenciou MIT. <\/p>\n

Komponenty na interakciu s hardv\u00e9rom a n\u00edzko\u00farov\u0148ov\u00e9 slu\u017eby spr\u00e1vy pam\u00e4te s\u00fa presunut\u00e9 do mikrojadra. Poskytovan\u00e9 mo\u017enosti mikrojadra sa vyu\u017e\u00edvaj\u00fa na spustenie vrstvy so S\u00daBD. Vysoko\u00farov\u0148ov\u00e9 syst\u00e9mov\u00e9 slu\u017eby, ktor\u00e9 zabezpe\u010duj\u00fa vykon\u00e1vanie aplik\u00e1ci\u00ed, komunikuj\u00fa iba s distribuovanou S\u00daBD a s\u00fa oddelen\u00e9 od mikrojadra a \u0161pecifick\u00fdch komponentov pre konkr\u00e9tny syst\u00e9m. <\/p>\n

Stavba nad distribuovanou S\u00daBD umo\u017e\u0148uje, aby boli syst\u00e9mov\u00e9 slu\u017eby od za\u010diatku distribuovan\u00e9 a nie viazan\u00e9 na konkr\u00e9tny uzol, \u010do odli\u0161uje DBOS od tradi\u010dn\u00fdch klastrov\u00fdch syst\u00e9mov, pri ktor\u00fdch na ka\u017edom uzle be\u017e\u00ed vlastn\u00fd exempl\u00e1r opera\u010dn\u00e9ho syst\u00e9mu, nad ktor\u00fdm sa sp\u00fa\u0161\u0165aj\u00fa jednotliv\u00e9 klastrov\u00e9 pl\u00e1nova\u010de, distribuovan\u00e9 FS a sie\u0165ov\u00ed mana\u017e\u00e9ri.

\"Predstaven\u00fd<\/center> <\/p>\n

Je zd\u00f4raznen\u00e9, \u017ee pou\u017eitie modern\u00fdch distribuovan\u00fdch S\u00daBD ako z\u00e1klad pre DBOS, ktor\u00e9 ukladaj\u00fa d\u00e1ta v opera\u010dnej pam\u00e4ti a podporuj\u00fa transakcie, ako s\u00fa VoltDB a FoundationDB, m\u00f4\u017ee zabezpe\u010di\u0165 v\u00fdkon dostato\u010dn\u00fd na efekt\u00edvne vykon\u00e1vanie mnoh\u00fdch syst\u00e9mov\u00fdch slu\u017eieb. V S\u00daBD m\u00f4\u017eu by\u0165 zahrnut\u00e9 aj d\u00e1ta pl\u00e1nova\u010da, s\u00faborov\u00e9ho syst\u00e9mu a IPC. Z\u00e1rove\u0148 sa S\u00daBD v\u00fdborne \u0161k\u00e1luj\u00fa, zabezpe\u010duj\u00fa atomickos\u0165 a izol\u00e1ciu transakci\u00ed, dok\u00e1\u017eu spravova\u0165 petabajty d\u00e1t a pon\u00fakaj\u00fa n\u00e1stroje na spr\u00e1vu pr\u00edstupu a sledovanie tokov d\u00e1t. <\/p>\n

Medzi v\u00fdhody navrhnutej architekt\u00fary patr\u00ed v\u00fdznamn\u00e9 roz\u0161\u00edrenie analytick\u00fdch mo\u017enost\u00ed a zn\u00ed\u017eenie komplexnosti k\u00f3du v\u010faka pou\u017e\u00edvaniu be\u017en\u00fdch dopytov k datab\u00e1zov\u00e9mu syst\u00e9mu v slu\u017eb\u00e1ch opera\u010dn\u00e9ho syst\u00e9mu, pri\u010dom implement\u00e1cia transakci\u00ed a prostriedkov na zabezpe\u010denie vysokej dostupnosti je preveden\u00e1 na stranu datab\u00e1zov\u00e9ho syst\u00e9mu (tak\u00e1to funkcionalita m\u00f4\u017ee by\u0165 raz implementovan\u00e1 na strane datab\u00e1zov\u00e9ho syst\u00e9mu a vyu\u017eit\u00e1 v opera\u010dnom syst\u00e9me a aplik\u00e1ci\u00e1ch). <\/p>\n

Napr\u00edklad, klastrov\u00fd pl\u00e1nova\u010d m\u00f4\u017ee uklada\u0165 inform\u00e1cie o \u00faloh\u00e1ch a spracovate\u013eoch v tabu\u013ek\u00e1ch datab\u00e1zov\u00e9ho syst\u00e9mu a realizova\u0165 pl\u00e1novacie oper\u00e1cie ako be\u017en\u00e9 transakcie, kombinuj\u00fac imperat\u00edvny k\u00f3d a SQL. Pou\u017eitie transakci\u00ed zjednodu\u0161uje rie\u0161enie probl\u00e9mov, ako je spr\u00e1va viacer\u00fdch threadov a obnova po zlyhaniach, preto\u017ee transakcie zaru\u010duj\u00fa konzistenciu a odolnos\u0165 stavu. V kontexte pr\u00edkladu s pl\u00e1nova\u010dom transakcie umo\u017e\u0148uj\u00fa zorganizova\u0165 s\u00fabe\u017en\u00fd pr\u00edstup k zdie\u013ean\u00fdm \u00fadajom a zaru\u010di\u0165 zachovanie integrity stavu v pr\u00edpade zlyhan\u00ed. <\/p>\n

Poskytovan\u00e9 mechanizmy v datab\u00e1zovom syst\u00e9me pre sledovanie pr\u00edstupu a anal\u00fdzu \u00fadajov m\u00f4\u017eu by\u0165 vyu\u017eit\u00e9 na sledovanie pr\u00edstupu a zmien stavu aplik\u00e1ci\u00ed, monitorovanie, ladenie a udr\u017eiavanie bezpe\u010dnosti. Napr\u00edklad po zisten\u00ed neopr\u00e1vnen\u00e9ho pr\u00edstupu do syst\u00e9mu m\u00f4\u017eeme prostredn\u00edctvom vykon\u00e1vania SQL dopytov ur\u010di\u0165 rozsah \u00faniku identifikovan\u00edm v\u0161etk\u00fdch oper\u00e1ci\u00ed vykonan\u00fdch procesmi, ktor\u00e9 z\u00edskali pr\u00edstup k d\u00f4vern\u00fdm inform\u00e1ci\u00e1m. <\/p>\n

Projekt sa vyv\u00edja u\u017e viac ako rok a nach\u00e1dza sa vo f\u00e1ze vytv\u00e1rania prototypov jednotliv\u00fdch komponentov architekt\u00fary. V s\u00fa\u010dasnosti je pripraven\u00fd prototyp funguj\u00facich slu\u017eieb opera\u010dn\u00e9ho syst\u00e9mu nad datab\u00e1zov\u00fdm syst\u00e9mom, ako s\u00fa FS, IPC a pl\u00e1nova\u010d, a tie\u017e sa vyv\u00edja programov\u00e9 prostredie, ktor\u00e9 poskytuje rozhranie na sp\u00fa\u0161\u0165anie aplik\u00e1ci\u00ed na b\u00e1ze modelu FaaS (function-as-a-service). <\/p>\n

V nasleduj\u00facej f\u00e1ze v\u00fdvoja sa pl\u00e1nuje poskytn\u00fa\u0165 kompletn\u00fd softv\u00e9rov\u00fd stack pre distribuovan\u00e9 aplik\u00e1cie. Ako datab\u00e1zov\u00fd syst\u00e9m sa v experimentoch zatia\u013e pou\u017e\u00edva VoltDB, ale diskutuje sa o vytvoren\u00ed vlastnej vrstvy na ukladanie \u00fadajov alebo implement\u00e1cii nedostatkov\u00fdch funkci\u00ed v existuj\u00facich datab\u00e1zov\u00fdch syst\u00e9moch. Na programe diskusie je aj ot\u00e1zka, ktor\u00e9 komponenty by mali by\u0165 vykon\u00e1van\u00e9 na \u00farovni jadra a ktor\u00e9 by sa mohli realizova\u0165 nad datab\u00e1zov\u00fdm syst\u00e9mom.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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