{"id":53315,"date":"2019-11-29T00:00:00","date_gmt":"2019-11-28T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/active-restore-mozhet-li-avarijnoe-vosstanovlenie-proishodit-bystree-namnogo-bystree"},"modified":"2020-02-18T14:01:12","modified_gmt":"2020-02-18T11:01:12","slug":"active-restore-mozhet-li-avarijnoe-vosstanovlenie-proishodit-bystree-namnogo-bystree","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/active-restore-mozhet-li-avarijnoe-vosstanovlenie-proishodit-bystree-namnogo-bystree","title":{"rendered":"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Oluliste andmete varundamine on hea asi. Aga mis juhtub, kui t\u00f6\u00f6d tuleb j\u00e4tkata kohe ja iga minut loeb? Me Acronises otsustasime uurida, kui kiiresti on v\u00f5imalik s\u00fcsteemi k\u00e4ivitamise \u00fclesanne lahendada. See on esimene postitus sarjast Active Restore, kus r\u00e4\u00e4gin, kuidas me alustasime projekti koos Innopolis \u00dclikooliga, millise lahenduse leidsime ja mille kallal me t\u00e4na t\u00f6\u00f6tame. T\u00e4iendavad \u00fcksikasjad on allpool.<\/p>\n<p><img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/14e18cf97e38df10a2dcce530be99122.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex> <br \/>\nTere! Minu nimi on Daulet Tumbaev ja t\u00e4na tahan jagada teiega oma kogemust s\u00fcsteemi arendamisel, mis kiirendab havariide taastamist. Et r\u00e4\u00e4kida kogu projekti arenguteest, alustame natuke kaugemalt. Praegu t\u00f6\u00f6tan Acronises, kuid olen ka Innopolis \u00dclikooli vilistlane, mille l\u00f5petasin magistri\u00f5ppe programmiga \"Tarkvara arenduse juhtimine\" (tuntud kui MSIT-SE). Innopolis on noor \u00fclikool ja \u00f5ppeprogramm on veel noorem. Kuid see on \u00fcles ehitatud Carnegie Melloni \u00dclikooli \u00f5ppekavadele, millel on selline teema nagu t\u00f6\u00f6stusprojektid. <\/p>\n<p>Industriaalse projekti eesm\u00e4rk on viia tudeng reaalsetesse arendusprotsessidesse ja kinnistada saadud teadmised praktikas. Selleks teeb \u00fclikool koost\u00f6\u00f6d ettev\u00f5tetega nagu Yandex, Acronis, MTC ja paljude teistega (2018. aasta seisuga oli \u00fclikoolil kokku 144 partnerit). Koost\u00f6\u00f6 k\u00e4igus pakuvad ettev\u00f5tted \u00fclikoolile oma t\u00f6\u00f6alaseid suundi ning tudengid valivad \u00fche projekti, mis neid huvitab ja vastab nende ettevalmistustasemele. Veel kaks aastat tagasi olin \u201cbarj\u00e4\u00e4ri teisel pool\u201d ja t\u00f6\u00f6tasin tudengina Acronise teise projekti kallal. Kuid seekord olin tehniline konsultant tudengitele ettev\u00f5tte poolt ning pakkusin Innopolis \u00dclikoolile projekti Active Restore. Active Restore'i idee formulareeris Acronise Kernel'i meeskond, kuid lahenduse arendamine algas koos Innopolis \u00dclikooliga.<\/p>\n<h3>Active Restore \u2013 milleks seda vajatakse?<\/h3>\n<p>\nTraditsiooniline havariide taastamine t\u00f6\u00f6tab standardse skeemi alusel. P\u00e4rast arvutiga probleeme logite sisse m\u00f5ne varundamiss\u00fcsteemi veebiliidesesse, n\u00e4iteks Acronis True Image, ja vajutate suurt nuppu \"taasta\". Edasi tuleb oodata N minutit, ja alles siis saab t\u00f6\u00f6ga j\u00e4tkata.<\/p>\n<p><img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/ffd0d3248f6a625831270af42b58f80d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nProbleem seisneb selles, et see number N, tuntud ka kui RTO (kaose taastumise sihtaja), lubatud taastumise aeg, v\u00f5ib olla \u00fcsna ulatuslik, s\u00f5ltudes \u00fchenduse kiirusest (kui taastamine toimub pilvest), teie masina k\u00f5vaketta mahust ja mitmest muust tegurist. Kas on v\u00f5imalik seda v\u00e4hendada? Jah, on v\u00f5imalik, sest t\u00f6\u00f6 j\u00e4tkamiseks ei ole alati vajalik terve arvuti kettad. Samad fotod ja videod ei m\u00f5juta seadme funktsionaalsust ja neid saab hiljem taustal alla laadida. <\/p>\n<h3>Juht on vajalik...<\/h3>\n<p>\nOperatsioonis\u00fcsteem arvab, et see k\u00e4ivitub t\u00e4iesti valmis kettaga. Seet\u00f5ttu teeb Windows mitmeid kettakontrollimise protseduure. S\u00fcsteem ei lase normaalselt k\u00e4ivitada, kui m\u00f5ni oodatud fail on puuduv v\u00f5i rikutud. Selle probleemi lahendamiseks otsustati kettale paigutada meie loodud, nn \u00fcmbersuunamisfailid, mis asendavad puuduvad v\u00f5i kahjustatud failid, kuid on tegelikult t\u00fchjad. Selliste \u00fcmbersuunajate loomine ei v\u00f5ta kaua aega, kuna neil ei ole tegelikult sisu. <\/p>\n<p>Edasi toimub taastamine j\u00e4rgmiselt. Taustprotsessis, paralleelselt operatsioonis\u00fcsteemi t\u00f6\u00f6ga, t\u00e4idetakse 't\u00fchjaks' j\u00e4\u00e4mised andmetega. Taustal toimuv taastamisprotsess arvestab kettakoormust ja ei \u00fcleta kehtestatud piirm\u00e4\u00e4ra. Siiski v\u00f5ib kasutaja v\u00f5i ise operatsioonis\u00fcsteem ootamatult n\u00f5uda faili, mida veel ei ole. Siin astub sisse teine taastamisre\u017eiim. N\u00f5utava faili prioriteet t\u00f5statakse maksimaalseks ja taastamisprotsess laeb faili kiiresti kettale. Operatsioonis\u00fcsteem saab vajaliku faili, kuigi v\u00e4ikese viivitusega. <\/p>\n<p>Nii n\u00e4eb v\u00e4lja ideaalne pilt. Kuid tegelikus maailmas on palju peidetud k\u00fcsimusi ja potentsiaalseid ummikseise. Koos Innopolis olevate \u00fcli\u00f5pilastega otsustasime uurida seda taastamisstsenaariumi, hinnata RTO saavutamist ja m\u00f5ista, kas selline l\u00e4henemine on teostatav? Selliseid lahendusi turul lihtsalt ei olnud.<\/p>\n<p>Ja kui teenuse osa otsustasin usaldada Innopolis olevatele poistele, siis Acronise sees algas t\u00f6\u00f6 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/url?q=https:\/\/docs.microsoft.com\/en-us\/windows-hardware\/drivers\/ifs\/file-system-minifilter-drivers&amp;sa=D&amp;ust=1574830326626000&amp;usg=AFQjCNHTjhYKohofWzxWVMH1osZesX1DPg\">mini-failis\u00fcsteemi \u0444\u0438\u043b\u044c\u0442\u0440-\u0434\u0440\u0430\u0439\u0432\u0435\u0440i kallal<\/a><\/noindex>. Sellega tegeleb Windows Kernel meeskond. Plaan oli selline: <\/p>\n<ul>\n<li>K\u00e4ivitada draiver operatsioonis\u00fcsteemi k\u00e4ivitamise varases etapis, <\/li>\n<li>T\u00f6\u00f6 ajal, kui <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/url?q=https:\/\/docs.microsoft.com\/en-us\/windows-hardware\/drivers\/gettingstarted\/user-mode-and-kernel-mode&amp;sa=D&amp;ust=1574830326627000&amp;usg=AFQjCNHxcMlVkRC4HMEw4BTrX2tB0DNALA\">kasutajaruumi<\/a><\/noindex> on t\u00e4ielikult valmis, laadida teenus<\/li>\n<li>Teenusele koordineerib ja t\u00f6\u00f6tleb draiveri p\u00e4ringud ning reguleerib selle edasist t\u00f6\u00f6d.<\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/9f144da3317bbf894ab111f233d8ca8b.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h3>Draiveri arendamise n\u00fcansid<\/h3>\n<p>\nKui minu kolleegid r\u00e4\u00e4givad teenusest teises postituses, siis selles tekstis avame draiveri arendamise n\u00fcansse. Juba v\u00e4lja arendatud mini-filtri draiveril on kaks t\u00f6\u00f6re\u017eiimi \u2013 kas s\u00fcsteem k\u00e4ivitus normaalses re\u017eiimis v\u00f5i just praegu taastatakse see p\u00e4rast t\u00f5rget. Enne kui kasutajate teegid ja rakendused, ning seega ka meie teenus, laaditakse, k\u00e4itub draiver samamoodi. Ta ei tea, millises olekus s\u00fcsteem parasjagu asub. Tulemuseks on iga create, read ja write protokollimine, k\u00f5ik metaandmed fikseeritakse. Ja kui teenus on veebis, siis draiver edastab selle teabe teenusele.<\/p>\n<p><img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/d5f5a75bbce403ad98907ebcc7605883.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nTavalise k\u00e4ivitamise korral edastab teenus draiverile signaali \u201cRelax\u201d, et ta \u201crahuneks\u201d ja l\u00f5petaks k\u00f5igi andmete detailse protokollimise. Sellisel juhul liigub draiver \u00fcle ainult ketta muudatuste protokollimisele ja teatab neist teenusele, mis Acronise teiste t\u00f6\u00f6riistade abil toetab kettavaru maksimaalselt v\u00e4rskena s\u00e4ilitamist selle seadme peal, mille kasutaja on m\u00e4\u00e4ranud. See v\u00f5ib olla pilve-, kaug- v\u00f5i \u00f6ine varukoopia. <\/p>\n<p><img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/c383fa09eaf2956d6d8aa1aad9114bb3.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nKui taastamisre\u017eiim aktiveeritakse, teatab teenus draiverile, et tal on vaja t\u00f6\u00f6tada \u201cRecovery\u201d re\u017eiimis. S\u00fcsteem on just taastunud t\u00f5rke j\u00e4rgselt ja niipea, kui ta esitab p\u00e4ringu faili avamiseks kettal, peab mini-filter selle toimingu katkestama, tegema ise selle p\u00e4ringu, kontrollima, kas selline fail on kettal olemas ja kas seda on v\u00f5imalik avada. <\/p>\n<p>Kui faili pole, edastab mini-filter selle teabe teenusele, mis t\u00f5stab faili taastamise prioriteeti (kogu selle aja jooksul toimub taustal taastamine). Tulemuseks on see, et see fail h\u00fcppab lihtsalt j\u00e4rjekorra etteotsa. P\u00e4rast seda taastab teenus (v\u00f5i Acronise muud meetodid) selle faili ning teatab draiverile, et k\u00f5ik on korras, n\u00fc\u00fcd saab operatsioonisystem sellele juurdep\u00e4\u00e4su ja draiver \"lahti laseb\" originaalsest p\u00e4ringust s\u00fcsteemilt kettale. <\/p>\n<p>Kui taastamine ei ole v\u00f5imalik, teavitab teenus draiverit, et faili pole ka varukoopias. Meie mini-filter draiver edastab lihtsalt s\u00fcsteemip\u00e4ringu edasi ning originaalne p\u00e4rija (isegi operatsioonis\u00fcsteem v\u00f5i rakendus) saab veateate \"fail ei leitud\". Kuid see on t\u00e4iesti normaalne, kui faili t\u00f5epoolest ei olnud kettal ega varukoopias.<\/p>\n<p><img decoding=\"async\" alt=\"Active Restore: Kas katastroofi taastamine saab toimuda kiiremini? Oluliselt kiiremini?\" src=\"\/wp-content\/uploads\/2019\/11\/e6c53a237ed1e41f2a1bdb6493f0c9b1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMuidugi t\u00f6\u00f6tab operatsioonis\u00fcsteem palju aeglasemalt, sest igasuguste failide v\u00f5i teekide lugemine toimub mitmes etapis, v\u00f5imalusel ka kaugressurssidega juurdep\u00e4\u00e4suga. Kuid siiski saab kasutaja oma t\u00f6\u00f6ga alustada v\u00e4ga kiiresti, kuni taastamine veel kestab.<\/p>\n<h3>Peab minema madalamale, veel madalamale\u2026<\/h3>\n<p>\nProtot\u00fc\u00fcp t\u00f5estas oma t\u00f6\u00f6kindlust. Kuid me avastasime ka vajaduse edasi liikuda, kuna m\u00f5nel juhul toimuvad endiselt lukustused. N\u00e4iteks v\u00f5ib operatsioonis\u00fcsteem k\u00fcsida erinevaid teeke mitmes niidis, mis toob kaasa meie teenuse sulgemise enda peale. <\/p>\n<p>Probleem, millega praegu tegelen, on Active Restore kiirus ja s\u00fcsteemi turvalisuse taseme t\u00f5stmine. Oletame, et s\u00fcsteem ei vaja tervet faili, vaid ainult selle osa. Selleks on v\u00e4lja t\u00f6\u00f6tatud veel \u00fcks draiver - kettafiltri draiver. See t\u00f6\u00f6tab enam mitte failitasemel, vaid plokkide tasemel. T\u00f6\u00f6printsiip on sarnane: tavatasandil protokollib draiver lihtsalt kettal muudetud plokid, samas kui taastamisre\u017eiimis proovib ta plokki ise lugeda, eba\u00f5nnestumise korral k\u00fcsib ta teenuselt prioriteedi t\u00f5stmist. Samal ajal j\u00e4\u00e4vad k\u00f5ik \u00fclej\u00e4\u00e4nud s\u00fcsteemi osad muutumatuks. N\u00e4iteks ei kahtle OS taseme teenus, et talle pakutakse suhtlemist teise draiveriga, sest peamine \u00fclesanne on pakkuda OS-le just neid andmeid, mis on vajalikud funktsioneerimiseks. See suund vajab m\u00e4rkimisv\u00e4\u00e4rseid t\u00e4iustusi, v\u00e4hemalt seet\u00f5ttu, et teenus ei oska veel m\u00f5elda plokkide tasemel.<\/p>\n<p>J\u00e4rgmise sammuna otsustasin k\u00e4ivitada draiveri s\u00fcgavamalt ja varem, laskudes UEFI draiverite ja Native Windows rakenduste tasemele teenuse asemel. Selleks on v\u00e4lja t\u00f6\u00f6tatud <noindex><a rel=\"nofollow\" href=\"https:\/\/edk2-docs.gitbooks.io\/edk-ii-uefi-driver-writer-s-guide\/3_foundation\/37_uefi_images\/372_drivers.html\">UEFI boot draiver<\/a><\/noindex> (v\u00f5i DXE draiver), mis k\u00e4ivitub ja kaob enne operatsioonis\u00fcsteemi k\u00e4ivitumist. Kuid UEFI draiverite \"ajalugu\", \u00fcksikasjad kogumise ja installimise kohta ning Windows Native rakenduste spetsiifika k\u00e4sitleme j\u00e4rgmises postituses. Nii et palun liituge meie blogiga, samas kui ma valmistan ette juttu j\u00e4rgmise t\u00f6\u00f6 etapi kohta. Ootan v\u00e4ga teie kommentaare ja n\u00f5uandeid.<\/p>\n<p class=\"for_users_only_msg\">Ainult registreeritud kasutajad saavad k\u00fcsitluses osaleda. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/auth\/login\/\">Logige sisse<\/a><\/noindex>, palun.<\/p>\n<h2 class=\"default-block__polling-title\">Kas olete kunagi olnud olukordades, kus taastumine kestis piinarikkalt kaua:<\/h2>\n<ul class=\"poll-result\">\n<li class=\"poll-result__item\">\n<p>                <strong class=\"poll-result__data-percent  poll-result__data-percent_winner\">65.1%<\/strong>Jah28<\/p>\n<\/li>\n<li class=\"poll-result__item\">\n<p>                <strong class=\"poll-result__data-percent\">23.2%<\/strong>Ei10<\/p>\n<\/li>\n<li class=\"poll-result__item\">\n<p>                <strong class=\"poll-result__data-percent\">11.6%<\/strong>Ei m\u00f5elnud<\/p>\n<\/li>\n<\/ul>\n<p>    H\u00e4\u00e4letas 43 kasutajat. Hoidus 3 kasutajat.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/acronis\/blog\/477658\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0435 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u0430\u0436\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u2013 \u044d\u0442\u043e \u0445\u043e\u0440\u043e\u0448\u043e. \u041d\u043e \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u0440\u0430\u0431\u043e\u0442\u0443 \u043d\u0443\u0436\u043d\u043e \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u0442\u044c \u0441\u0440\u0430\u0437\u0443, \u0438 \u043d\u0430 \u0441\u0447\u0435\u0442\u0443 \u043a\u0430\u0436\u0434\u0430\u044f \u043c\u0438\u043d\u0443\u0442\u0430? \u041c\u044b \u0432 Acronis \u0440\u0435\u0448\u0438\u043b\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c, \u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0440\u0435\u0448\u0438\u0442\u044c \u0437\u0430\u0434\u0430\u0447\u0443 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u0431\u044b\u0441\u0442\u0440\u043e\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u044b. \u0418 \u044d\u0442\u043e \u043f\u0435\u0440\u0432\u044b\u0439 \u043f\u043e\u0441\u0442 \u0438\u0437 \u0441\u0435\u0440\u0438\u0438 Active Restore, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u044f \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0443, \u043a\u0430\u043a \u043c\u044b \u043f\u0440\u0438\u0441\u0442\u0443\u043f\u0438\u043b\u0438 \u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0443 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u0423\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u043e\u043c \u0418\u043d\u043d\u043e\u043f\u043e\u043b\u0438\u0441, \u043a\u0430\u043a\u043e\u0435 \u043d\u0430\u0448\u043b\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-53315","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0420\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u0435 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u0430\u0436\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u2013 \u044d\u0442\u043e \u0445\u043e\u0440\u043e\u0448\u043e. \u041d\u043e \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u0440\u0430\u0431\u043e\u0442\u0443 \u043d\u0443\u0436\u043d\u043e \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u0442\u044c \u0441\u0440\u0430\u0437\u0443, \u0438 \u043d\u0430 \u0441\u0447\u0435\u0442\u0443 \u043a\u0430\u0436\u0434\u0430\u044f \u043c\u0438\u043d\u0443\u0442\u0430? 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