{"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\/cs\/blog\/news\/predstavlena-raspredelyonnaya-operaczionnaya-sistema-dbos-rabotayushhaya-poverh-subd","title":{"rendered":"Byla p\u0159edstavena distribuovan\u00e1 opera\u010dn\u00ed syst\u00e9m DBOS, funguj\u00edc\u00ed nad DBMS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byl p\u0159edstaven projekt DBOS (DBMS-oriented Operating System), kter\u00fd vyv\u00edj\u00ed nov\u00fd opera\u010dn\u00ed syst\u00e9m pro provozov\u00e1n\u00ed \u0161k\u00e1lovateln\u00fdch distribuovan\u00fdch aplikac\u00ed. Zvl\u00e1\u0161tnost\u00ed projektu je pou\u017eit\u00ed DB pro ukl\u00e1d\u00e1n\u00ed aplikac\u00ed a stavu syst\u00e9mu, stejn\u011b jako organizace p\u0159\u00edstupu k stavu pouze prost\u0159ednictv\u00edm transakc\u00ed. Projekt rozv\u00edjej\u00ed v\u00fdzkumn\u00edci z Massachusettsk\u00e9ho technologick\u00e9ho institutu, Wisconsinsk\u00e9 a Stanfordsk\u00e9 univerzity, univerzity Carnegie Mellon a spole\u010dnost\u00ed Google a VMware. V\u00fdsledky jsou \u0161\u00ed\u0159eny pod licenc\u00ed MIT. <\/p>\n

Komponenty pro interakci s hardwarem a n\u00edzko\u00farov\u0148ov\u00e9 slu\u017eby spr\u00e1vy pam\u011bti byly p\u0159esunuty do mikroj\u00e1dra. Mo\u017enosti poskytovan\u00e9 mikroj\u00e1rdrem jsou vyu\u017e\u00edv\u00e1ny pro spu\u0161t\u011bn\u00ed vrstvy s DB. Vysoce \u00farov\u0148ov\u00e9 syst\u00e9mov\u00e9 slu\u017eby, kter\u00e9 zaji\u0161\u0165uj\u00ed prov\u00e1d\u011bn\u00ed aplikac\u00ed, interaguj\u00ed pouze s distribuovan\u00fdm DB a jsou odd\u011bleny od mikroj\u00e1dra a komponent\u016f specifick\u00fdch pro konkr\u00e9tn\u00ed syst\u00e9m. <\/p>\n

V\u00fdstavba nad distribuovan\u00fdm DB umo\u017e\u0148uje, aby syst\u00e9mov\u00e9 slu\u017eby byly od po\u010d\u00e1tku distribuovan\u00e9 a nebyly v\u00e1z\u00e1ny na konkr\u00e9tn\u00ed uzel, co\u017e odli\u0161uje DBOS od tradi\u010dn\u00edch clusterov\u00fdch syst\u00e9m\u016f, v nich\u017e na ka\u017ed\u00e9m uzlu b\u011b\u017e\u00ed vlastn\u00ed instance opera\u010dn\u00edho syst\u00e9mu, nad n\u00edm\u017e se spou\u0161t\u00ed jednotliv\u00e9 clusterov\u00e9 pl\u00e1nova\u010de, distribuovan\u00e9 FS a s\u00ed\u0165ov\u00e9 mana\u017eery.

\"Byla<\/center> <\/p>\n

Je zaznamen\u00e1no, \u017ee pou\u017eit\u00ed modern\u00edch distribuovan\u00fdch DB jako z\u00e1klad DBOS, kter\u00e9 uchov\u00e1vaj\u00ed data v opera\u010dn\u00ed pam\u011bti a podporuj\u00ed transakce, jako jsou VoltDB a FoundationDB, je schopno zajistit v\u00fdkon dostate\u010dn\u00fd pro efektivn\u00ed prov\u00e1d\u011bn\u00ed mnoha syst\u00e9mov\u00fdch slu\u017eeb. V DB mohou b\u00fdt tak\u00e9 um\u00edst\u011bna data pl\u00e1nova\u010d\u016f, souborov\u00fdch syst\u00e9m\u016f a IPC. P\u0159itom se DB skv\u011ble \u0161k\u00e1luj\u00ed, zaji\u0161\u0165uj\u00ed atomicitu a izolaci transakc\u00ed, mohou spravovat petabajty dat a poskytuj\u00ed n\u00e1stroje pro spr\u00e1vu p\u0159\u00edstupu a sledov\u00e1n\u00ed tok\u016f dat. <\/p>\n

Mezi v\u00fdhody navrhovan\u00e9 architektury pat\u0159\u00ed v\u00fdrazn\u00e9 roz\u0161\u00ed\u0159en\u00ed analytick\u00fdch mo\u017enost\u00ed a sn\u00ed\u017een\u00ed slo\u017eitosti k\u00f3du d\u00edky pou\u017eit\u00ed b\u011b\u017en\u00fdch dotaz\u016f na S\u00cdDB v opera\u010dn\u00edm syst\u00e9mu, kde je implementace transakc\u00ed a prost\u0159edk\u016f pro zaji\u0161t\u011bn\u00ed vysok\u00e9 dostupnosti p\u0159esunuta na stranu S\u00cdDB (takov\u00e1 funk\u010dnost m\u016f\u017ee b\u00fdt jednou implementov\u00e1na na stran\u011b S\u00cdDB a pou\u017eita v OS a aplikac\u00edch). <\/p>\n

Nap\u0159\u00edklad clusterov\u00fd pl\u00e1nova\u010d m\u016f\u017ee uchov\u00e1vat informace o \u00faloh\u00e1ch a zpracovatel\u00edch v tabulk\u00e1ch S\u00cdDB a prov\u00e1d\u011bt pl\u00e1novac\u00ed operace jako b\u011b\u017en\u00e9 transakce, m\u00eds\u00edc\u00ed imperativn\u00ed k\u00f3d a SQL. Pou\u017eit\u00ed transakc\u00ed usnad\u0148uje \u0159e\u0161en\u00ed takov\u00fdch probl\u00e9m\u016f, jako je spr\u00e1va v\u00edcero vl\u00e1ken a obnova po selh\u00e1n\u00ed, proto\u017ee transakce zaru\u010duj\u00ed konzistenci a stabilitu stavu. V kontextu p\u0159\u00edkladu s pl\u00e1nova\u010dem umo\u017e\u0148uj\u00ed transakce zorganizovat sou\u010dasn\u00fd p\u0159\u00edstup ke sd\u00edlen\u00fdm dat\u016fm a zaru\u010dit zachov\u00e1n\u00ed integrity stavu v p\u0159\u00edpad\u011b selh\u00e1n\u00ed. <\/p>\n

Poskytovan\u00e9 v S\u00cdDB mechanismy pro veden\u00ed log\u016f a anal\u00fdzu dat mohou b\u00fdt pou\u017eity pro sledov\u00e1n\u00ed p\u0159\u00edstupu a zm\u011bn stavu aplikac\u00ed, monitoring, lad\u011bn\u00ed a zabezpe\u010den\u00ed. Nap\u0159\u00edklad po zji\u0161t\u011bn\u00ed neopr\u00e1vn\u011bn\u00e9ho p\u0159\u00edstupu do syst\u00e9mu lze prost\u0159ednictv\u00edm vykon\u00e1n\u00ed SQL dotaz\u016f ur\u010dit rozsah \u00faniku t\u00edm, \u017ee odhal\u00edme v\u0161echny operace proveden\u00e9 procesy, kter\u00e9 z\u00edskaly p\u0159\u00edstup k d\u016fv\u011brn\u00fdm informac\u00edm. <\/p>\n

Projekt se vyv\u00edj\u00ed ji\u017e v\u00edce ne\u017e rok a je ve f\u00e1zi tvorby prototyp\u016f jednotliv\u00fdch komponent architektury. V sou\u010dasn\u00e9 dob\u011b byl p\u0159ipraven prototyp funk\u010dn\u00edch slu\u017eeb opera\u010dn\u00edho syst\u00e9mu nad S\u00cdDB, jako jsou FS, IPC a pl\u00e1nova\u010d, a tak\u00e9 se vyv\u00edj\u00ed programov\u00e9 prost\u0159ed\u00ed, kter\u00e9 poskytuje rozhran\u00ed pro spu\u0161t\u011bn\u00ed aplikac\u00ed na z\u00e1klad\u011b modelu FaaS (funkce jako slu\u017eba). <\/p>\n

V dal\u0161\u00ed f\u00e1zi v\u00fdvoje se pl\u00e1nuje poskytnout plnohodnotn\u00fd softwarov\u00fd stack pro distribuovan\u00e9 aplikace. Jako datab\u00e1zov\u00fd syst\u00e9m se pro experimenty zat\u00edm pou\u017e\u00edv\u00e1 VoltDB, ale prob\u00edh\u00e1 diskuse o vytvo\u0159en\u00ed vlastn\u00edho vrstvy pro ukl\u00e1d\u00e1n\u00ed dat nebo o implementaci chyb\u011bj\u00edc\u00edch funkc\u00ed v existuj\u00edc\u00edch datab\u00e1zov\u00fdch syst\u00e9mech. Tak\u00e9 se diskutuje o ot\u00e1zce, jak\u00e9 komponenty by m\u011bly b\u011b\u017eet na \u00farovni j\u00e1dra a kter\u00e9 by mohly b\u00fdt implementov\u00e1ny nad datab\u00e1zov\u00fdm syst\u00e9mem.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0440\u043e\u0435\u043a\u0442 DBOS (DBMS-oriented Operating System), \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u043d\u043e\u0432\u0443\u044e \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u043c\u044b\u0445 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. \u041e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0421\u0423\u0411\u0414 \u0434\u043b\u044f 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