{"id":39250,"date":"2019-10-31T22:28:41","date_gmt":"2019-10-31T19:28:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/rezervnoe-kopirovanie-chast-7-vyvody\/"},"modified":"2019-10-31T22:28:41","modified_gmt":"2019-10-31T19:28:41","slug":"rezervnoe-kopirovanie-chast-7-vyvody","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/rezervnoe-kopirovanie-chast-7-vyvody","title":{"rendered":"Varundamine, osa 7: J\u00e4reldused","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Varundamine, osa 7: J\u00e4reldused\" src=\"\/wp-content\/uploads\/2019\/10\/475781030b157d85aa9e9a1dc7ea7c6b.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>See m\u00e4rkus l\u00f5petab varundamise ts\u00fckli. Siin r\u00e4\u00e4gitakse p\u00fchendatud serveri (v\u00f5i VPS) loogilisest korraldusest, mis on varundamiseks mugav, ja pakutakse v\u00e4lja kiire taastamise variant, et v\u00e4ltida olulisi seise serveri h\u00e4daolukorra korral.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2 id=\"ishodnye-dannye\">Algandmed<\/h2>\n<p><\/p>\n<p>P\u00fchendatud serveril on tavaliselt v\u00e4hemalt kaks k\u00f5vaketta, mis on m\u00f5eldud RAID 1 (peegel) seadistamiseks. See on vajalik serveri t\u00f6\u00f6 j\u00e4tkamiseks, kui \u00fcks ketas eba\u00f5nnestub. Kui tegemist on tavalise p\u00fchendatud serveriga, v\u00f5ib olla eraldi riistvaraline RAID-kontroller, millel on aktiivne SSD vahem\u00e4lu tehnoloogia, niisiis v\u00f5ib tavalistele k\u00f5vaketastele lisaks olla \u00fchendatud \u00fcks v\u00f5i mitu SSD. M\u00f5nikord pakutakse p\u00fchendatud servereid, kus kohalikke kettaid on ainult SATADOM (v\u00e4ikesed kettad, mille konstruktsioon on nagu USB m\u00e4lu, mis on \u00fchendatud SATA pessa), v\u00f5i isegi tavaline v\u00e4ike (8-16 GB) USB-m\u00e4lu, mis on \u00fchendatud spetsiaalsesse sisemisse pessa, samas kui andmed saadakse SAN-ilt, mis on \u00fchendatud eraldiseisva andmesalvestusv\u00f5rguga (Ethernet 10G, FC jne), ja neid on ka p\u00fchendatud servereid, mis laadivad otse SAN-ilt. Selliseid variante ma ei k\u00e4sitle, kuna sel juhul \u00fcleminek serveri varundamise \u00fclesandele kuulub spetsialistile, kes haldab SAN-i; reeglina on seal erinevaid patenteeritud tehnoloogiaid olekute pildistamiseks, sisseehitatud deduplikatsioon ja muud s\u00fcsteemiadministraatori mugavused, mis on k\u00e4sitletud selles ts\u00fcklis varasemates osades. P\u00fchendatud serveri ketta maht v\u00f5ib ulatuda k\u00fcmnete terabaitideni, s\u00f5ltuvalt serveriga \u00fchendatud kettaste arvust ja mahust. VPS puhul on mahud tagasihoidlikumad: tavaliselt mitte rohkem kui 100 GB (kuid on ka suuremaid), ja selliste VPS-ide hinnad v\u00f5ivad olla kergesti kallimad kui k\u00f5ige odavamad p\u00fchendatud serverid samalt hostilt. VPS-l on enamasti vaid \u00fcks ketas, kuna selle all on SAN (v\u00f5i m\u00f5ni h\u00fcperkonvergeeritud lahendus). M\u00f5nikord on VPS-il mitu ketast erinevate omadustega, erinevate eesm\u00e4rkide jaoks:<\/p>\n<p><\/p>\n<ul>\n<li>v\u00e4ike s\u00fcsteemne \u2014 operatsioonis\u00fcsteemi installimiseks;<\/li>\n<li>suur \u2014 kasutajaandmete salvestamiseks.<\/li>\n<\/ul>\n<p><\/p>\n<p>S\u00fcsteemi taaskasutamisel juhtpaneeli abil ei kustutata kasutajaandmete kettale, kuid s\u00fcsteemne uuendatakse t\u00e4ielikult. VPS-i puhul v\u00f5ib hostija pakkuda nuppu, mis teeb VPS-i (v\u00f5i ketta) oleku kuvandi, kuid kui installite oma operatsioonis\u00fcsteemi v\u00f5i unustate aktiveerida vajaliku teenuse VPS-is \u2014 v\u00f5ivad m\u00f5ned andmed ikkagi kaduma minna. Lisaks nupule pakutakse tavaliselt andmete salvestamise teenust, mis on enamasti tugevalt piiratud. See on tavaliselt konto FTP v\u00f5i SFTP protokolli kaudu juurdep\u00e4\u00e4suga, m\u00f5nikord koos SSH-ga, piiratud shelliga (n\u00e4iteks rbash) v\u00f5i k\u00e4skude k\u00e4ivitamise piiranguga authorized_keys kaudu (ForcedCommand kaudu). <\/p>\n<p><\/p>\n<p>P\u00fchendatud server on \u00fchendatud v\u00f5rku kahe 1 Gbit\/s kiirusel pordi kaudu, m\u00f5nikord v\u00f5ivad need olla 10 Gbit\/s kiirusel kaardid. VPS-i v\u00f5rgu liides on tavaliselt \u00fcks. Andmekeskused ei piira enamasti sisev\u00f5rgu kiirus, kuid piiravad Interneti-juurdep\u00e4\u00e4su kiirus.<\/p>\n<p><\/p>\n<p>T\u00fc\u00fcpiline sellise p\u00fchendatud serveri v\u00f5i VPS-i koormus koosneb veebiserverist, andmebaasist ja rakenduste serverist. Sageli v\u00f5ivad olla paigaldatud erinevad t\u00e4iendavad abiteenused, sealhulgas veebiserveri v\u00f5i andmebaasi jaoks: otsingumootor, meilis\u00fcsteem jne.<\/p>\n<p><\/p>\n<p>Varukoopiate salvestamiseks kasutatakse spetsiaalselt ettevalmistatud serverit, millest hakatakse hiljem p\u00f5hjalikumalt r\u00e4\u00e4kima.<\/p>\n<p><\/p>\n<h2 id=\"logicheskaya-organizaciya-diskovoy-sistemy\">Kettas\u00fcsteemi loogiline organiseerimine<\/h2>\n<p><\/p>\n<p>Kui on olemas RAID-kontroller v\u00f5i on tegu VPS-iga \u00fche ketasaga ning ei ole erilisi eelistusi ketass\u00fcsteemi t\u00f6\u00f6 osas (n\u00e4iteks eraldiseisev kiire ketas andmebaasi jaoks), jagatakse kogu vaba ruum j\u00e4rgmiselt: luuakse \u00fcks partitsioon, mille peale luuakse LVM mahugrupp, milles luuakse mitu mahut: 2 v\u00e4ikesest sama suurusega, mida kasutatakse p\u00f5hifailis\u00fcsteemina (vahetatakse j\u00e4rkj\u00e4rgult uuenduste ajal kiireks tagasiviimiseks, idee on inspireeritud Calculate Linux'i distributsioonist), veel \u00fcks \u2014 vahetuspartitsiooniks, \u00fclej\u00e4\u00e4nud vaba ruum jagatakse v\u00e4ikesteks mahuteks, mida kasutatakse p\u00f5hifailis\u00fcsteemina t\u00e4isv\u00e4\u00e4rtuslike konteinerite jaoks, virtuaalmasinate ketaste jaoks, failis\u00fcsteemide jaoks kasutajate kontode jaoks \/home (iga konto jaoks \u2014 oma failis\u00fcsteem), failis\u00fcsteemide jaoks rakenduskonteinerite jaoks.<\/p>\n<p><\/p>\n<p>Oluline m\u00e4rkus: mahtude puhul tuleb tagada, et need oleksid t\u00e4ielikult iseseisvad, st ei tohiks \u00fcksteisest ega ka juurkataloogist s\u00f5ltuda. Virtuaalmasinate v\u00f5i konteinerite puhul kehtib see automaatselt. Kui aga tegemist on rakenduste konteinerite v\u00f5i kodukataloogidega, tuleks m\u00f5elda veebiserveri ja teiste teenuste konfigureerimisfailide eraldamisele, et v\u00e4hendada mahtudevahelisi s\u00f5ltuvusi. N\u00e4iteks iga veebisait t\u00f6\u00f6tleb oma kasutaja alt, veebisaidi konfigureerimisfailid asuvad kasutaja kodukataloogis, veebiserveri seadetes konfigureerimisfailid ei ole lisatud l\u00e4bi \/etc\/nginx\/conf.d\/<em>.conf, vaid n\u00e4iteks \/home\/<\/em>\/configs\/nginx\/*.conf<\/p>\n<p><\/p>\n<p>Kui aga on mitu ketast, saab luua tarkvara RAID-massiivi (ja seadistada selle vahem\u00e4lu SSD-le, kui on vajadus ja v\u00f5imalused), mille peale on \u00fcles ehitatud LVM vastavalt eespool toodud juhistele. Samuti v\u00f5ib kasutada ZFS-i v\u00f5i BtrFS-i, kuid siin tuleks mitu korda m\u00f5elda: m\u00f5lemad n\u00f5uavad palju t\u00f5sist l\u00e4henemist ressurssidele, lisaks ei ole ZFS Linuxi tuumaga kaasas.<\/p>\n<p><\/p>\n<p>S\u00f5ltumata kasutatavast skeemist on alati m\u00f5istlik eelnevalt arvutada ligikaudne kirjutamiskiirus kettale, seej\u00e4rel arvutada vaba ruumi suurus, mis reserveeritakse v\u00f5tmete loomiseks. N\u00e4iteks, kui meie server kirjutab andmeid kiirusel 10 megabaidi sekundis ja kogu andmemassi suurus on 10 terabaiti \u2014 s\u00fcnkroniseerimise aeg v\u00f5ib ulatuda p\u00e4evi (22 tundi \u2014 nii kaua kulub selle koguse edastamiseks 1 Gbit\/s v\u00f5rgus) \u2014 tuleks reserveerida umbes 800 GB. Tegelikult on number v\u00e4iksem, saab julgelt jagada selle loogiliste vol\u00fc\u00fcmide arvuga.<\/p>\n<p><\/p>\n<h2 id=\"ustroystvo-servera-hraneniya-rezervnyh-kopiy\">Varundusseadmestik<\/h2>\n<p><\/p>\n<p>Peamine erinevus varundusserveri ja teiste serverite vahel on see, et need kasutavad suuri, odavaid ja v\u00f5rreldes kiiret ketast. Kuna modernsed HDD-d on juba \u00fcletanud 10 TB piiri \u00fche ketta kohta, on failis\u00fcsteemide v\u00f5i RAID-s\u00fcsteemide kasutamine, kus toimub kontrollsumma, kohustuslik. Seet\u00f5ttu v\u00f5ib teise ketta rike tekkida suurenenud koormuse t\u00f5ttu array \u00fcmberkujundamise v\u00f5i failis\u00fcsteemi taastamise ajal (mis v\u00f5ib v\u00f5tta mitu p\u00e4eva!). Kuni 1 TB kettatel ei olnud see nii tundlik. Lihtsuse huvides eeldan, et ketas on jagatud kaheks enam-v\u00e4hem v\u00f5rdses suuruses osaks (n\u00e4iteks LVM-i abil):<\/p>\n<p><\/p>\n<ul>\n<li>partitsioonid, mis vastavad serveritele, mida kasutatakse kasutajaandmete salvestamiseks (neil rakendatakse viimast loodud varukoopiat kontrollimise eesm\u00e4rgil);<\/li>\n<li>partitsioonid, mida kasutatakse BorgBackup'i hoidlatena (siia pannakse otse andmed varukoopiate jaoks).<\/li>\n<\/ul>\n<p><\/p>\n<p>T\u00f6\u00f6p\u00f5him\u00f5te seisneb selles, et iga serveri jaoks luuakse eraldi mahud BorgBackup'i hoidlate jaoks, kuhu l\u00e4hevad andmed tootmisserveritest. Hoidlad t\u00f6\u00f6tavad ainult lisamise re\u017eiimis, mis v\u00e4listab andmete tahtliku kustutamise v\u00f5imaluse, mist\u00f5ttu deduplikatsiooni ja regulaarsete puhastusprotseduuride kaudu s\u00e4ilitatakse vanu varukoopiaid (j\u00e4\u00e4vad aasta varukoopiad, viimase aasta jooksul igakuised, viimase kuu jooksul igan\u00e4dalased, viimase n\u00e4dala jooksul iga p\u00e4ev, \u00e4\u00e4rmuslikel juhtudel - iga tunni tagant viimase p\u00e4eva jooksul: kokku 24 + 7 + 4 + 12 + aastased - umbes 50 koopiat iga serveri kohta).<br \/>\nBorgBackup'i hoidlates ei aktiveerita ainult lisamise re\u017eiimi, selle asemel kasutatakse ForcedCommand'i failis .ssh\/authorized_keys, mille struktuur on umbes j\u00e4rgmine:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">from=\"serveri aadress\",command=\"\/usr\/local\/bin\/borg serve --append-only --restrict-to-path \/home\/servername\/borgbackup\/\",no-pty,no-agent-forwarding,no-port-forwarding,no-X11-forwarding,no-user-rc AAAAA.......<\/code><\/pre>\n<p><\/p>\n<p>M\u00e4\u00e4ratud teele on pandud Borgi kohal olev wrapper-skript, mis mitte ainult ei k\u00e4ivita binaarfaili parameetritega, vaid k\u00e4ivitab ka varukoopia taastamisprotsessi p\u00e4rast andmete kopeerimise l\u00f5ppu. Selle jaoks loob wrapper-skript k\u00f5rval asuva t\u00e4his-faili vastava hoidla k\u00f5rvale. Viimane tehtud varukoopia taastatakse automaatselt vastavale loogilisele mahtule p\u00e4rast andmete \u00fclekande protsessi l\u00f5ppu.<\/p>\n<p><\/p>\n<p>See konstruktsioon v\u00f5imaldab perioodiliselt eemaldada tarbetuid varukoopiaid ning takistab ka tootmisserveritel salvestusserveris midagi kustutada.<\/p>\n<p><\/p>\n<h2 id=\"process-rezervnogo-kopirovaniya\">Varundamisprotsess<\/h2>\n<p><\/p>\n<p>Varundamise algatajaks on ise p\u00fchendatud server v\u00f5i VPS, kuna see skeem annab serveri poolt varundamisprotsessi \u00fcle suurema kontrolli. Esiteks tehakse aktiivse juurkatalooge oleku hetkefoto, mis mountitakse ja laaditakse BorgBackup abil varundusserverisse. P\u00e4rast andmete kogumise l\u00f5ppu eemaldatakse ja kustutatakse hetkefoto.<\/p>\n<p><\/p>\n<p>\u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445 (\u0434\u043e 1 \u0433\u0431 \u0434\u043b\u044f \u043a\u0430\u0436\u0434\u043e\u0433\u043e \u0441\u0430\u0439\u0442\u0430) \u0434\u0435\u043b\u0430\u0435\u0442\u0441\u044f \u0434\u0430\u043c\u043f \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u0432 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0439 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0442\u043e\u043c, \u0442\u0443\u0434\u0430, \u0433\u0434\u0435 \u0440\u0430\u0441\u043f\u043e\u043b\u043e\u0436\u0435\u043d\u044b \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u044d\u0442\u043e\u0433\u043e \u0436\u0435 \u0441\u0430\u0439\u0442\u0430, \u043d\u043e \u0442\u0430\u043a, \u0447\u0442\u043e\u0431\u044b \u0434\u0430\u043c\u043f \u043d\u0435 \u0431\u044b\u043b \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0447\u0435\u0440\u0435\u0437 \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440. \u0415\u0441\u043b\u0438 \u0436\u0435 \u0431\u0430\u0437\u044b \u0431\u043e\u043b\u044c\u0448\u0438\u0435 \u2014 \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u043d\u0430\u0441\u0442\u0440\u043e\u0438\u0442\u044c &#171;\u0433\u043e\u0440\u044f\u0447\u0435\u0435&#187; \u0441\u043d\u044f\u0442\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0445, \u043a \u043f\u0440\u0438\u043c\u0435\u0440\u0443 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e xtrabackup \u0434\u043b\u044f MySQL, \u0438\u043b\u0438 \u0440\u0430\u0431\u043e\u0442\u0443 WAL c archive_command \u0432 PostgreSQL. \u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u0431\u0430\u0437\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0431\u0443\u0434\u0435\u0442 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c\u0441\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e \u043e\u0442 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0430\u0439\u0442\u043e\u0432.<\/p>\n<p><\/p>\n<p>Kui kasutatakse konteinerite v\u00f5i virtuaalmasinate tehnoloogiat, tuleb seadistada qemu-guest-agent, CRIU v\u00f5i teised vajalikud tehnoloogiad. Enamikes muudes olukordades t\u00e4iendavat seadistamist ei ole tavaliselt vajalik \u2014 lihtsalt loome loogiliste mahutite koopiaid, mida t\u00f6\u00f6deldakse sarnaselt juurefailis\u00fcsteemi oleku koopia tegemisega. Andmete eemaldamise peale koopiaid kustutatakse.<\/p>\n<p><\/p>\n<p>Edasi\u00f6eldav t\u00f6\u00f6 toimub varukoopiakandjal:<\/p>\n<p><\/p>\n<ul>\n<li>kontrollitakse iga reposiitri viimast tehtud varukoopiat,<\/li>\n<li>kontrollitakse, kas olemas on m\u00e4rgifail, mis n\u00e4itab, et andmete eemaldamise protsess on l\u00f5pule viidud,<\/li>\n<li>andmed paigaldatakse vastavale kohaliku kettale,<\/li>\n<li>m\u00e4rkfail k\u00f5rvaldatakse<\/li>\n<\/ul>\n<p><\/p>\n<h2 id=\"process-vosstanovleniya-rabotosposobnosti-servera\">serveri t\u00f6\u00f6v\u00f5ime taastamise protsess<\/h2>\n<p><\/p>\n<p>Kui p\u00f5hiserver k\u00e4tkeb, siis k\u00e4ivitatakse sarnane p\u00fchendatud server, mis laaditakse m\u00f5nest standardpildist. T\u00f5en\u00e4oliselt toimub laadimine \u00fcle v\u00f5rgu, kuid andmekeskuse tehnik, kes serverit seadistab, v\u00f5ib selle standardpildi \u00fche ketta peale kohe kopeerida. Laadimine toimub m\u00e4llu, p\u00e4rast mida algab taastamisprotsess:<\/p>\n<p><\/p>\n<ul>\n<li>esitatakse p\u00e4ring plokk-seadmestiku \u00fchendamiseks iscsinbd v\u00f5i m\u00f5ne muu sarnase loogilise ketta protokolliga, mis sisaldab hukkunud serveri juurefailis\u00fcsteemi; kuna juurefailis\u00fcsteem peab olema v\u00e4ike - see etapp peaks olema l\u00f5petatud m\u00f5ne minutiga. Samuti taastatakse k\u00e4ivitaja;<\/li>\n<li>lokalsete loogiliste mahtude struktuur taastatakse, loogilised mahud \u00fchendatakse varundusseadmest kernel'i dm_clone mooduli abil: andmete taastamine algab, samal ajal salvestatakse muutused koheselt kohalikesse kettasektsioonidesse<\/li>\n<li>kanne k\u00e4ivitatakse k\u00f5igi f\u00fc\u00fcsiliste kettadega \u2014 serveri t\u00f6\u00f6v\u00f5ime t\u00e4ielikult taastatakse, kuid madalama j\u00f5udlusega;<\/li>\n<li>andmete s\u00fcnkroonimise l\u00f5ppedes eraldatakse loogilised mahud varundusseadmest, kanne suletakse, server taask\u00e4ivitatakse;<\/li>\n<\/ul>\n<p><\/p>\n<p>P\u00e4rast taask\u00e4ivitamist on serveril k\u00f5ik andmed, mis olid varukoopia loomise hetkel, ja k\u00f5iki muudatusi, mis taastamise protsessis tehti.<\/p>\n<p>\n<b class=\"spoiler_title\">Teised ts\u00fckli artiklid<\/b><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/449282\/\">Varundamine, osa 1: Miks on varundamine vajalik, meetodite, tehnoloogiate \u00fclevaade<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/452630\/\">Varundamine, osa 2: rsync-p\u00f5histe varunduslahenduste \u00fclevaade ja testimine<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/454420\/\">Varundamine, osa 3: Duplicity ja Duplicati \u00fclevaade ja testimine<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/454734\/#first_unread\">Varundamine, osa 4: Zbackup, restic, borgbackup \u00fclevaade ja testimine<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/459550\/\">Varundamine, osa 5: Bacula ja Veeam Backup for Linuxi testimine<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/468963\/\">Varundamine: osa lugejate poolt palutud: AMANDA, UrBackup, BackupPC \u00fclevaade<\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/470802\/\">Varundamine, osa 6: Varundamisvahendite v\u00f5rdlus<\/a><\/noindex><br \/>\nVarundamine, osa 7: J\u00e4reldused<\/p>\n<p><\/p>\n<p>Kutsun arvustama esitatud ettepanekut kommentaarides, t\u00e4nan teid t\u00e4helepanu eest!<\/p>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/472776\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u0430\u043d\u043d\u0430\u044f \u0437\u0430\u043c\u0435\u0442\u043a\u0430 \u0437\u0430\u0432\u0435\u0440\u0448\u0430\u0435\u0442 \u0446\u0438\u043a\u043b \u043e \u0440\u0435\u0437\u0435\u0440\u0432\u043d\u043e\u043c \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438. \u0412 \u043d\u0435\u0439 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\u043e\u0441\u043e\u0431\u044b\u0445 \u043f\u0440\u043e\u0441\u0442\u043e\u0435\u0432 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u0430\u0432\u0430\u0440\u0438\u0438. \u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0412\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u0439 \u0441\u0435\u0440\u0432\u0435\u0440 \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u0438\u043c\u0435\u0435\u0442 \u043c\u0438\u043d\u0438\u043c\u0443\u043c \u0434\u0432\u0430 \u0436\u0435\u0441\u0442\u043a\u0438\u0445 \u0434\u0438\u0441\u043a\u0430, \u0441\u043b\u0443\u0436\u0430\u0449\u0438\u0445 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 RAID \u043c\u0430\u0441\u0441\u0438\u0432\u0430 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Selles k\u00e4sitletakse p\u00fchendatud serveri (v\u00f5i VPS) loogilist korraldust, mis on varundamiseks mugav, ning pakutakse kiire taastamise varianti varukoopiast, et v\u00e4ltida suuri seisakuid \u00f5nnetuse korral. 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