{"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\/hu\/blog\/news\/predstavlena-raspredelyonnaya-operaczionnaya-sistema-dbos-rabotayushhaya-poverh-subd","title":{"rendered":"A distributed operating system DBOS is presented, operating atop a DBMS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bemutat\u00e1sra ker\u00fclt a DBOS (DBMS-orient\u00e1lt Oper\u00e1ci\u00f3s Rendszer) projekt, amely egy \u00faj oper\u00e1ci\u00f3s rendszer fejleszt\u00e9s\u00e9re \u00f6sszpontos\u00edt, amely k\u00e9pes sk\u00e1l\u00e1zhat\u00f3 elosztott alkalmaz\u00e1sok futtat\u00e1s\u00e1ra. A projekt saj\u00e1toss\u00e1ga, hogy adatb\u00e1zis-kezel\u0151 rendszereket (DBMS) haszn\u00e1l az alkalmaz\u00e1sok \u00e9s a rendszer \u00e1llapot\u00e1nak t\u00e1rol\u00e1s\u00e1ra, valamint a rendszer\u00e1llapot el\u00e9r\u00e9s\u00e9t csak tranzakci\u00f3k r\u00e9v\u00e9n szervezi meg. A projektet a Massachusetts Institute of Technology (MIT), a Wisconsin Egyetem, a Stanford Egyetem, a Carnegie Mellon Egyetem \u00e9s a Google \u00e9s VMware c\u00e9gek kutat\u00f3i fejlesztik. A fejleszt\u00e9sek az MIT licenc alatt \u00e9rhet\u0151ek el.    <\/p>\n<p>A hardverrel val\u00f3 interakci\u00f3ra szolg\u00e1l\u00f3 komponensek \u00e9s az alacsony szint\u0171 mem\u00f3ria kezel\u00e9si szolg\u00e1ltat\u00e1sok egy mikrokernelbe ker\u00fcltek. A mikrokernel \u00e1ltal biztos\u00edtott lehet\u0151s\u00e9gek felhaszn\u00e1l\u00e1s\u00e1val fut az adatb\u00e1zis-kezel\u0151 r\u00e9tege. A magas szint\u0171 rendszer szolg\u00e1ltat\u00e1sok, amelyek az alkalmaz\u00e1sok v\u00e9grehajt\u00e1s\u00e1t biztos\u00edtj\u00e1k, csak az elosztott DBMS-sel l\u00e9pnek kapcsolatba, \u00e9s el vannak v\u00e1lasztva a mikrokernt\u0151l \u00e9s a konkr\u00e9t rendszerhez tartoz\u00f3 komponensekt\u0151l.     <\/p>\n<p>Az elosztott DBMS f\u00f6l\u00e9 t\u00f6rt\u00e9n\u0151 \u00e9p\u00edtkez\u00e9s lehet\u0151v\u00e9 teszi, hogy a rendszer szolg\u00e1ltat\u00e1sok eredetileg elosztottak \u00e9s nem k\u00f6t\u0151dnek egy adott csom\u00f3ponthoz, ami megk\u00fcl\u00f6nb\u00f6zteti a DBOS-t a hagyom\u00e1nyos klaszter rendszerekt\u0151l, ahol minden csom\u00f3ponton saj\u00e1t oper\u00e1ci\u00f3s rendszer p\u00e9ld\u00e1ny fut, amely f\u00f6l\u00f6tt k\u00fcl\u00f6n klaszter \u00fctemez\u0151k, elosztott f\u00e1jlrendszerek \u00e9s h\u00e1l\u00f3zati menedzserek m\u0171k\u00f6dnek.       <center><img decoding=\"async\" alt=\"A distributed operating system DBOS is presented, operating atop a DBMS\" src=\"\/wp-content\/uploads\/2022\/09\/3f504305269ef739afa07f5b2d737df7.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Megjegyzik, hogy a DBOS alapj\u00e1ul szolg\u00e1l\u00f3 modern elosztott DBMS-ek, melyek az adatokat mem\u00f3ri\u00e1ban t\u00e1rolj\u00e1k \u00e9s t\u00e1mogatj\u00e1k a tranzakci\u00f3kat, mint a VoltDB \u00e9s FoundationDB, k\u00e9pesek olyan teljes\u00edtm\u00e9nyt biztos\u00edtani, amely elegend\u0151 sok rendszer szolg\u00e1ltat\u00e1s hat\u00e9kony v\u00e9grehajt\u00e1s\u00e1hoz. Az adatb\u00e1zis-kezel\u0151k t\u00e1rolhatj\u00e1k az \u00fctemez\u0151, a f\u00e1jlrendszer \u00e9s az IPC adatait is. Ezen fel\u00fcl az DBMS-ek kiv\u00e1l\u00f3an sk\u00e1l\u00e1zhat\u00f3ak, biztos\u00edtj\u00e1k a tranzakci\u00f3k atomarit\u00e1s\u00e1t \u00e9s elk\u00fcl\u00f6n\u00edtetts\u00e9g\u00e9t, k\u00e9pesek petab\u00e1jt adatot kezelni, \u00e9s eszk\u00f6z\u00f6ket biztos\u00edtanak az hozz\u00e1f\u00e9r\u00e9s kezel\u00e9se \u00e9s az adatfolyamok nyomon k\u00f6vet\u00e9se \u00e9rdek\u00e9ben.        <\/p>\n<p>A javasolt architekt\u00fara el\u0151nyei k\u00f6z\u00e9 tartozik a jelent\u0151s analitikai lehet\u0151s\u00e9gek b\u0151v\u00edt\u00e9se \u00e9s a k\u00f3d \u00f6sszetetts\u00e9g\u00e9nek cs\u00f6kkent\u00e9se az oper\u00e1ci\u00f3s rendszer szolg\u00e1ltat\u00e1saiban a szok\u00e1sos SQL lek\u00e9rdez\u00e9sek alkalmaz\u00e1s\u00e1val, ahol a tranzakci\u00f3k megval\u00f3s\u00edt\u00e1sa \u00e9s a magas rendelkez\u00e9sre \u00e1ll\u00e1s fenntart\u00e1s\u00e1nak eszk\u00f6zei a SGBD oldal\u00e1ra ker\u00fclnek (ez a funkcionalit\u00e1s egyszer megval\u00f3s\u00edthat\u00f3 a SGBD oldal\u00e1n, \u00e9s felhaszn\u00e1lhat\u00f3 az OS-ben \u00e9s alkalmaz\u00e1sokban).     <\/p>\n<p>P\u00e9ld\u00e1ul a klaszteres \u00fctemez\u0151 inform\u00e1ci\u00f3kat t\u00e1rolhat a feladatokr\u00f3l \u00e9s a kezel\u0151kr\u0151l az SGBD t\u00e1bl\u00e1iban, \u00e9s a tervez\u00e9si m\u0171veleteket szok\u00e1sos tranzakci\u00f3kk\u00e9nt hajthatja v\u00e9gre, \u00f6tv\u00f6zve az imperat\u00edv k\u00f3dot \u00e9s az SQL-t. A tranzakci\u00f3k alkalmaz\u00e1sa megk\u00f6nny\u00edti az olyan probl\u00e9m\u00e1k kezel\u00e9s\u00e9t, mint a t\u00f6bb sz\u00e1l kezel\u00e9se \u00e9s a hibat\u0171r\u00e9s, mivel a tranzakci\u00f3k garant\u00e1lj\u00e1k az \u00e1llapot konzisztenci\u00e1j\u00e1t \u00e9s megb\u00edzhat\u00f3s\u00e1g\u00e1t. A tervez\u0151 p\u00e9ld\u00e1j\u00e1ban a tranzakci\u00f3k lehet\u0151v\u00e9 teszik a k\u00f6z\u00f6sen haszn\u00e1lt adatokhoz val\u00f3 egyidej\u0171 hozz\u00e1f\u00e9r\u00e9s megszervez\u00e9s\u00e9t \u00e9s az \u00e1llapot integrit\u00e1s\u00e1nak biztos\u00edt\u00e1s\u00e1t meghib\u00e1sod\u00e1sok eset\u00e9n.    <\/p>\n<p>Az SGBD-ben biztos\u00edtott napl\u00f3z\u00e1si \u00e9s adatelemz\u00e9si mechanizmusok alkalmazhat\u00f3k az alkalmaz\u00e1sok \u00e1llapot\u00e1nak nyomon k\u00f6vet\u00e9s\u00e9re \u00e9s m\u00f3dos\u00edt\u00e1s\u00e1ra, monitoroz\u00e1s\u00e1ra, hibakeres\u00e9s\u00e9re \u00e9s a biztons\u00e1g fenntart\u00e1s\u00e1ra. P\u00e9ld\u00e1ul, ha jogosulatlan hozz\u00e1f\u00e9r\u00e9st \u00e9szlelnek a rendszerhez, SQL lek\u00e9rdez\u00e9sek v\u00e9grehajt\u00e1s\u00e1val meghat\u00e1rozhat\u00f3 a sziv\u00e1rg\u00e1s m\u00e9rt\u00e9ke, felt\u00e1rva minden m\u0171veletet, amelyet a bizalmas inform\u00e1ci\u00f3khoz hozz\u00e1f\u00e9r\u0151 folyamatok v\u00e9grehajtottak.    <\/p>\n<p>A projekt m\u00e1r t\u00f6bb mint egy \u00e9ve folyamatban van, \u00e9s a rendszer architekt\u00far\u00e1j\u00e1nak egyes komponenseinek protot\u00edpusait k\u00e9sz\u00edtik. Jelenleg elk\u00e9sz\u00fclt az oper\u00e1ci\u00f3s rendszer SGBD-n fut\u00f3 szolg\u00e1ltat\u00e1sainak protot\u00edpusa, mint p\u00e9ld\u00e1ul f\u00e1jlrendszer, IPC \u00e9s \u00fctemez\u0151, valamint fejleszt\u00e9s alatt \u00e1ll egy szoftverk\u00f6rnyezet, amely interf\u00e9szt biztos\u00edt a FaaS (function-as-a-service) modell alapj\u00e1n t\u00f6rt\u00e9n\u0151 alkalmaz\u00e1sok ind\u00edt\u00e1s\u00e1hoz.     <\/p>\n<p>A fejleszt\u00e9s k\u00f6vetkez\u0151 szakasz\u00e1ban teljes k\u00f6r\u0171 szoftverstacket tervez\u00fcnk bemutatni elosztott alkalmaz\u00e1sokhoz. Jelenleg a kutat\u00e1sok sor\u00e1n a VoltDB-t haszn\u00e1lj\u00e1k adatb\u00e1ziskezel\u0151k\u00e9nt, de folyamatban van egy saj\u00e1t adatkezel\u0151 r\u00e9teg l\u00e9trehoz\u00e1s\u00e1nak megbesz\u00e9l\u00e9se, vagy a megl\u00e9v\u0151 adatb\u00e1zis-kezel\u0151kben hi\u00e1nyz\u00f3 funkci\u00f3k megval\u00f3s\u00edt\u00e1sa. T\u00e1rgyal\u00e1s alatt \u00e1ll az is, hogy mely komponenseknek kell a kernel szintj\u00e9n m\u0171k\u00f6dni\u00fck, \u00e9s melyek val\u00f3s\u00edthat\u00f3k meg az adatb\u00e1zis-kezel\u0151k f\u00f6l\u00f6tt.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57735\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u044b, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044e \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0435\u0440\u0435\u0437 \u0442\u0440\u0430\u043d\u0437\u0430\u043a\u0446\u0438\u0438. \u041f\u0440\u043e\u0435\u043a\u0442 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c\u0438 \u0438\u0437 \u041c\u0430\u0441\u0441\u0430\u0447\u0443\u0441\u0435\u0442\u0441\u043a\u043e\u0433\u043e \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0438\u043d\u0441\u0442\u0438\u0442\u0443\u0442\u0430, \u0412\u0438\u0441\u043a\u043e\u043d\u0441\u0438\u043d\u0441\u043a\u043e\u0433\u043e \u0438 \u0421\u0442\u044d\u043d\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u043e\u0432, \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u041a\u0430\u0440\u043d\u0435\u0433\u0438-\u041c\u0435\u043b\u043b\u043e\u043d\u0430 \u0438 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Google \u0438 VMware. \u041d\u0430\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0442\u0441\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":105026,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105025","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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