{"id":35725,"date":"2019-10-31T22:05:58","date_gmt":"2019-10-31T19:05:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/davlenie-v-norme-zachem-tsodu-kontrol-podpora-vozduha\/"},"modified":"2019-10-31T22:05:58","modified_gmt":"2019-10-31T19:05:58","slug":"davlenie-v-norme-zachem-tsodu-kontrol-podpora-vozduha","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/davlenie-v-norme-zachem-tsodu-kontrol-podpora-vozduha","title":{"rendered":"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?\u00a0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/36d1796f5324e0c9e69879d2e1013456.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nU \u010dovjeku sve treba biti savr\u0161enstvo, a u modernom data centru sve treba raditi poput \u0161vicarskih satova. Nijedan komponent slo\u017eene arhitekture in\u017eenjerskih sustava data centra ne smije ostati bez pa\u017enje od strane operativne slu\u017ebe. Ovim razmatranjima vodili smo se u Linxdatacenteru u Sankt Peterburgu, pripremaju\u0107i se za certifikaciju Uptime Management &amp; Operations 2018. godine i dovode\u0107i sve sustave data centra u skladu s najboljim svjetskim standardima.\u00a0\u00a0<\/p>\n<p>Danas \u0107u govoriti o tome kako i za\u0161to smo implementirali sustav daljinskog nadzora pritiska i \u00bbpodr\u0161ke\u00ab zraka u serverima. Podsjetit \u0107u da je tijekom pripreme za reviziju Uptime Institute jedan od postavljenih zadataka bio i problem \u010disto\u0107e. Na\u0161 tim radio je u dvije oblasti: \u010di\u0161\u0107enje (ranije je moj kolega <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/linxdatacenter\/blog\/445766\/\">ve\u0107 govorio<\/a><\/noindex> o tome kako smo se borili protiv pra\u0161ine u servernim prostorijama) i nadzor nad pritiskom u servernim dvoranama. Meni, kao glavnom in\u017eenjeru tvrtke, upravo je bilo povjereno drugo.<br \/>\n\u00a0<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>O \u010demu se radi<\/h2>\n<p>\nU bilo kojoj servernoj prostoriji postoji sustav op\u0107e ventilacije. On je vrlo jednostavan: jedan ventilacijski ure\u0111aj radi na dovod zraka unutra, dok drugi \u2013 na njegovu ekstrakciju van. Oba motora upravljaju se frekvencijskim regulatorima, \u0161to zna\u010di da se mo\u017ee mijenjati frekvencija njihovih obrtaja i tako regulirati volumeni zrakoprovoda\/izvan.<br \/>\n\u00a0<br \/>\nOvaj sustav ima dva zadatka:<\/p>\n<ul>\n<li>Osigurati potreban obrtaj zraka za ugodno boravak ljudi u servernoj (broj ljudi odre\u0111uje se prema specifi\u010dnosti prostora),\n<\/li>\n<li>Osigurati vi\u0161ak zraka u servernoj, kako bi se sprije\u010dilo uvo\u0111enje \u010destica pra\u0161ine kroz otvorena vrata i o\u010duvala potrebna \u010disto\u0107a.\n<\/li>\n<\/ul>\n<p>\nDovodni ventilacijski ure\u0111aj treba dovoditi vi\u0161e zraka u servernu nego \u0161to se izvodi ekstrakcijom. Tako se osigurava vi\u0161ak pritiska u servernoj u odnosu na susjedne prostorije \u2013 tzv. \u00bbpodr\u0161ka\u00ab zraka. Uz ovakav sustav, zrak ulazi u servernu isklju\u010divo kroz filtere dovodne ventilacije, a dopustiti uvo\u0111enje nefiltriranog zraka u servernu je isklju\u010deno.<\/p>\n<p>Ako se iznenada dogodi obrnuto \u2013 izdu\u0161na ventilacija uklanja vi\u0161e zraka nego \u0161to dovodi dotok \u2013 nefiltrirani zrak po\u010dinje ulaziti u server sobu iz susjednih prostorija, \u0161to \u010desto dovodi do pojave pra\u0161ine na povr\u0161inama i opremi.<br \/>\n\u00a0<\/p>\n<h2>Bez kontrole\u00a0<\/h2>\n<p>\nNaizgled je sve jednostavno. Me\u0111utim, u trenutku po\u010detka rada na pobolj\u0161anju kvalitete \u010di\u0161\u0107enja u podatkovnom centru, nismo imali u\u010dinkovit alat za kontrolu prisutnosti podtlaka. Postavljali smo u\u010destalost dovoda ve\u0107om od u\u010destalosti izdu\u017eenja, a zatim smo dalje pode\u0161avali 'na oko'. Vrata server sobe otvaraju se s pote\u0161ko\u0107ama (kao da se privla\u010de unutra) \u2013 podtlak je negativan. Ako je obrnuto \u2013 mehanizam za zatvaranje ne mo\u017ee zatvoriti vrata \u2013 to zna\u010di da je podtlak vrlo jak. Tra\u017ee\u0107i ravnote\u017eu izme\u0111u ova dva stanja, negdje na sredini smo se i zaustavljali.<\/p>\n<p>Me\u0111utim, ovaj pristup nije pouzdan, i smatrali smo nemogu\u0107im dalje se oslanjati na njega.\u00a0<\/p>\n<p>Za\u0161to? Raditi 'na oko' zna\u010di da je nemogu\u0107e uzeti u obzir utjecaj stanja zra\u010dnih filtera na snagu dovodne ventilacije. Ako je filter \u010dist \u2013 vidjet \u0107emo odre\u0111ene pokazatelje otpora i volumena dovodnog zraka, dok \u0107e ti pokazatelji biti znatno druga\u010diji ako je filter zaprljan. Ove nijanse se ne mogu pratiti kroz dinamiku otvaranja-zatvaranja vrata.\u00a0<\/p>\n<p>Obi\u010dno se zamjena filtera obavlja prema standardnom mehani\u010dkom diferencijalnom manometru, koji isklju\u010duje ventilaciju u odre\u0111enoj fazi zaprljanosti filtera (razlika pritisaka prije i poslije filtera ne smije prema\u0161iti odre\u0111enu vrijednost koja odgovara normalnoj \u010disto\u0107i filtera).\u00a0<\/p>\n<p>Ispada da postoji dug period trajanja filtera, dok se on postupno zaprlja, a standardni diferencijalni manometar ventilacije smatra ga pogodnim za rad. No, snaga ventilacije, a time i sila podtlaka mijenjaju se ovisno o stanju filtera.<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/fe5ef65b624d4c8bdc61134a3f0f7ad6.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Standardni diferencijalni manometar ventilacije.\u00a0<\/i><br \/>\n\u00a0<br \/>\nNa kraju smo do\u0161li do zaklju\u010dka da je proces pode\u0161avanja i kontrole podtlaka u takvom scenariju previ\u0161e slo\u017een i ponovo neefikasan za podatkovni centar.<br \/>\n\u00a0<\/p>\n<h2>Re\u0161enje\u00a0<\/h2>\n<p>\nZa odgovor na pitanje '\u0160to bismo trebali u\u010diniti?' obratili smo se najboljim svjetskim praksama, a u tome nam je pomoglo putovanje u Stockholm s izletom po lokalnim podatkovnim centrima.<\/p>\n<p>U jednom od <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hr\/kompaniya\/data-centers\/\"   title=\"data centre\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4648\">data centre<\/a> Prona\u0161li smo rje\u0161enje koje nam je trebalo \u2013 mehani\u010dki diferencijalni manometar bio je postavljen na ulazu u servera i prikazivao je razliku pritisaka izme\u0111u \"servera\/korridora\".<\/p>\n<p>Zanimljivo je da \u0161vedski kolege koriste manometre na ulazu u servere i za kontrolu zasi\u0107enosti ventilacijskog filtra: mijenjaju filtre pri smanjenju pritiska, ne \u010dekaju\u0107i signal od ugra\u0111enog manometra ventilacijskog sustava. Nadle\u017eni vizualno kontroliraju pokazatelje tokom obilazaka.<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/88782668cc16e78f3b0c87c1e92161df.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nNakon povratka, po\u010deli smo tra\u017eiti sli\u010dnu opremu u Rusiji. Ispostavilo se da se sli\u010dni manometri koriste kod nas u takozvanim \"\u010distim prostorima\", odnosno u operacijama, laboratorijima itd. Zbog posebnog statusa prostora, cijene za tu opremu su postale astronomske.<\/p>\n<p>Osim toga, bila nam je potrebna ne analogna, ve\u0107 digitalna jedinica, po\u017eeljno s izlazom 4-20mA, kako bismo mogli povezati je s sustavom pra\u0107enja podatkovnog centra. To je bilo va\u017eno za postavljanje pragova za slanje obavijesti, kao i za prikupljanje i analizu statistike.\u00a0<br \/>\n\u00a0<\/p>\n<h2>Tko tra\u017ei \u2013 uvijek i na\u0111e<\/h2>\n<p>\nImali smo sre\u0107e \u2013 ubrzo nakon po\u010detka potrage uspjeli smo prona\u0107i potrebni ure\u0111aj: digitalni diferencijalni manometar s ekranom i izlazom za povezivanje s BMS uz bud\u017eet od oko 10.000 rubalja po jedinici.<\/p>\n<p>Postavili smo ga, podesili i iznena\u0111uje nas samo jedno \u2013 za\u0161to prije nismo do\u0161li na ovo sami, i za\u0161to ovo rje\u0161enje nije standardno u projektima podatkovnih centara.<\/p>\n<p>Ovako to izgleda:\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/a54f0974279d52579dbb8d26d6e8a1a8.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/bd838b502d61e8d15352431c498e779f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Elektronski manometar u hodniku ispred server sobe, cijev jednog mjerne kanal je postavljena u server sobu, drugi kanal mjeri pritisak u hodniku.<\/i><br \/>\n\u00a0<br \/>\nOvako se ure\u0111aj prikazuje u sustavu pra\u0107enja podatkovnog centra:<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/dd61179c61f08d9eda37d6237cdc0f3e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nOvako izgleda statistika o\u010ditanja manometra u sustavu pra\u0107enja:<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/6ba268f9ad27a0eb49d25165204ed88b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n\u00a0<br \/>\nPrema GOST R ISO 14644-4-2002 \u201e\u010cisti prostori i povezani kontrolirani uvjeti\u201c, koji smo uzeli kao orijentir, \"kako bi se osiguralo nesmetano otvaranje vrata i isklju\u010dila nepredvi\u0111ena protustruja zraka zbog turbulencije, razlika pritiska izme\u0111u \u010distih prostora ili \u010distih zona s razli\u010ditim razredima \u010disto\u0107e trebala bi biti od 5 do 20 Pa\".<\/p>\n<p>Ovo je raspon koji smo uzeli kao normu u na\u0161em podatkovnom centru. \u010cim do\u0111e do odstupanja, odmah se registrira u sustavu, kao \u0161to je prikazano na grafu u nastavku.\u00a0<\/p>\n<p><img decoding=\"async\" alt=\"Pritisak je normalan: za\u0161to podatkovnom centru treba kontrola dovoda zraka?&nbsp;\" src=\"\/wp-content\/uploads\/2019\/06\/71bc5dc48ff4325089e6dfcd72a01c65.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Nagli pad pritiska na grafu \u2013 to su otvorena vrata servera.\u00a0<\/i><\/p>\n<p>Ako su o\u010ditanja senzora ispod postavljene vrijednosti du\u017ee od 5 minuta \u2013 to zna\u010di da ne\u0161to nije u redu s filtrom, do\u0161lo je do neke nezgode, rije\u010dju, ne\u0161to nepredvi\u0111eno. Konkretno, na ovom grafu uzrok je dugo otvorenje vrata za unos opreme u prostor.<\/p>\n<h2>\u0160to smo stekli<\/h2>\n<p>\n<b>Prvo<\/b>, novi nivo kontrole i transparentnosti rada in\u017eenjerskih sustava podatkovnog centra.\u00a0<\/p>\n<p><b>Drugo<\/b>, kontrola \u010disto\u0107e postala je jo\u0161 u\u010dinkovitija: sustav omogu\u0107ava upozoravanje na smanjenje potiska i unaprijed mijenjanje zra\u010dnih filtara ili uklanjanje drugih uzroka njegove smanjenja.\u00a0<\/p>\n<p><b>Tre\u0107e<\/b>, svi ti procesi se kontroliraju matemati\u010dki preciznim alatima. Prikupljamo povijest promatranja u dinamici i imamo statistiku o stvarnom radnom vijeku zra\u010dnih filtara i svim nepredvi\u0111enim situacijama.<\/p>\n<p>Provedeni revizija Upravljanje &amp; Operacije i na\u0161 nedavni posjet europskim podatkovnim centrima pokazali su da smo pioniri u ovom podru\u010dju ne samo u Rusiji, ve\u0107 i u EU \u2013 takva rje\u0161enja ne nalaze se ba\u0161 \u010desto ni kod svih lidera tr\u017ei\u0161ta podatkovnih centara u Europi.<br \/>\n\u00a0<br \/>\nNaravno, ovaj sustav nije klju\u010dan za rad in\u017eenjerskih sustava lokacije. Istovremeno, to je izuzetno korisna dodana vrijednost za servisnu slu\u017ebu i odli\u010dna ilustracija uskla\u0111enosti na\u0161eg podatkovnog centra s visokim standardima. U na\u0161oj industriji nema sitnica.<br \/>\n<br \/>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/linxdatacenter\/blog\/457566\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u0447\u0435\u043b\u043e\u0432\u0435\u043a\u0435 \u0432\u0441\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c \u043f\u0440\u0435\u043a\u0440\u0430\u0441\u043d\u043e, \u0430 \u0432 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u043c \u0434\u0430\u0442\u0430-\u0446\u0435\u043d\u0442\u0440\u0435 \u0432\u0441\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c, \u043a\u0430\u043a \u0448\u0432\u0435\u0439\u0446\u0430\u0440\u0441\u043a\u0438\u0435 \u0447\u0430\u0441\u044b. \u041d\u0438 \u043e\u0434\u0438\u043d \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442 \u0441\u043b\u043e\u0436\u043d\u043e\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0426\u041e\u0414\u0430 \u043d\u0435 \u0434\u043e\u043b\u0436\u0435\u043d \u043e\u0441\u0442\u0430\u0432\u0430\u0442\u044c\u0441\u044f \u0431\u0435\u0437 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0441\u043b\u0443\u0436\u0431\u044b \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438. \u0418\u043c\u0435\u043d\u043d\u043e \u044d\u0442\u0438\u043c\u0438 \u0441\u043e\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u044f\u043c\u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e\u0432\u0430\u043b\u0438\u0441\u044c \u043c\u044b \u043d\u0430 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0435 Linxdatacenter \u0432 \u0421\u0430\u043d\u043a\u0442-\u041f\u0435\u0442\u0435\u0440\u0431\u0443\u0440\u0433\u0435, \u0433\u043e\u0442\u043e\u0432\u044f\u0441\u044c \u043a \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 Uptime Management &amp; Operations \u0432 2018 \u0433\u043e\u0434\u0443 \u0438 \u043f\u0440\u0438\u0432\u043e\u0434\u044f \u0432\u0441\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26765,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-35725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/hr\/blog\/news\/davlenie-v-norme-zachem-tsodu-kontrol-podpora-vozduha\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"hr_HR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0414\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 \u043d\u043e\u0440\u043c\u0435: \u0437\u0430\u0447\u0435\u043c \u0426\u041e\u0414\u0443 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043f\u043e\u0434\u043f\u043e\u0440\u0430 \u0432\u043e\u0437\u0434\u0443\u0445\u0430? 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