{"id":40232,"date":"2013-09-29T13:21:13","date_gmt":"2013-09-29T11:21:13","guid":{"rendered":"https:\/\/blog.wedos.cz\/?p=40232"},"modified":"2020-08-27T13:25:49","modified_gmt":"2020-08-27T11:25:49","slug":"jak-nas-ocernuje-udajny-zamestnanec-3-wedos-a-free-cooling","status":"publish","type":"post","link":"https:\/\/blog.wedos.com\/cs\/jak-nas-ocernuje-udajny-zamestnanec-3-wedos-a-free-cooling","title":{"rendered":"Jak n\u00e1s o\u010der\u0148uje \u00fadajn\u00fd zam\u011bstnanec (3) &#8211; WEDOS a free-cooling"},"content":{"rendered":"\n<p>Tak tady m\u00e1me dal\u0161\u00ed \u010dl\u00e1nek v r\u00e1mci kampan\u011b proti WEDOS. Autor u\u017e netvrd\u00ed, \u017ee je na\u0161\u00edm zam\u011bstnancem, ale pou\u0161t\u00ed se do dal\u0161\u00edho l\u017eiv\u00e9ho tvrzen\u00ed proti n\u00e1m.\u00a0<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>Ji\u017e vy\u0161el t\u0159et\u00ed \u010dl\u00e1nek, kter\u00fdm si na\u0161e ne\u00fasp\u011b\u0161n\u00e1 konkurence \u0159e\u0161\u00ed sv\u00e9 mindr\u00e1ky a svou obchodn\u00ed impotenci :-). Nap\u00ed\u0161eme se tedy pravdu o tom, jak to tedy u WEDOS je ve skute\u010dnosti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ekonomicky a ekologicky jedin\u011b u WEDOS<\/h2>\n\n\n\n<p><strong>Od po\u010d\u00e1tku tvrd\u00edme, \u017ee v\u0161e \u0159e\u0161\u00edme\u00a0<a href=\"https:\/\/www.wedos.cz\/proc-k-nam\" target=\"_blank\" rel=\"noopener\">ekonomicky<\/a>. Ono to ve v\u00fdsledky vypad\u00e1 i\u00a0<a href=\"http:\/\/www.nic.cz\/files\/nic\/doc\/Josef_Grill.pdf%E2%80%8E\" target=\"_blank\" rel=\"noopener\">ekologicky<\/a>.\u00a0<\/strong>Ji\u017e na za\u010d\u00e1tku jsme se rozhodli pro\u00a0<a href=\"https:\/\/blog.wedos.cz\/technologicke-zazemi\" target=\"_blank\" rel=\"noopener\">nej\u00fasporn\u011bj\u0161\u00ed \u0159e\u0161en\u00ed<\/a>. Vybrali jsme nej\u00fasporn\u011bj\u0161\u00ed servery na trhu, pou\u017e\u00edv\u00e1me v\u00fdhradn\u011b \u00fasporn\u00e9 procesory a to je tak neobvykl\u00e9, \u017ee o n\u00e1s psal i\u00a0<a href=\"http:\/\/www.intel.com\/content\/dam\/www\/public\/us\/en\/documents\/case-studies\/data-center-efficiency-xeon-l5640-wedos-vps-study.pdf\" target=\"_blank\" rel=\"noopener\">Intel na jejich anglick\u00fdch str\u00e1nk\u00e1ch<\/a>.<\/p>\n\n\n\n<p><strong>Postupn\u011b v\u0161e vylep\u0161ujeme a postupn\u011b v\u00edce a v\u00edce spo\u0159\u00edme na provozn\u00edch n\u00e1kladech.<\/strong>Zejm\u00e9na na elekt\u0159in\u011b. Za\u010dalo to servery, pokra\u010dovalo LED sv\u011btly v budov\u011b, p\u0159es free-cooling a skon\u010dilo t\u0159eba n\u00e1kupem nej\u00fasporn\u011bj\u0161\u00ed UPS na trhu (\u00fasporn\u011bj\u0161\u00ed jsou jen rota\u010dn\u00ed UPS).<\/p>\n\n\n\n<p>Nyn\u00ed dokonce top\u00edme odpadn\u00edm tepl\u00fdm vzduchem ze serverovny v na\u0161ich kancel\u00e1\u0159\u00edch a t\u00edm u\u0161et\u0159\u00edme t\u00e9m\u011b\u0159 100 000 ro\u010dn\u011b za plyn.<\/p>\n\n\n\n<p>Samoz\u0159ejm\u011b, \u017ee jsme si pro\u0161li i t\u00edm, \u017ee jsme b\u011bhem doby vybudovali studenou uli\u010dku mezi racky, ve v\u0161ech rackov\u00fdch sk\u0159\u00edn\u00edch m\u00e1me v\u0161echny mezery zaslepen\u00e9, aby nedoch\u00e1zelo ke ztr\u00e1t\u00e1m a k m\u00edch\u00e1n\u00ed studen\u00e9ho a tepl\u00e9ho vzduchu.<\/p>\n\n\n\n<p><strong>Tvrd\u00edme, \u017ee jsme pravd\u011bpodobn\u011b jedno z nejekologi\u010dt\u011bj\u0161\u00edch datacenter \u0161iroko daleko. \ud83d\ude42<\/strong><\/p>\n\n\n\n<p>Jak to u n\u00e1s vypad\u00e1 s t\u00edm chlazen\u00edm? Takhle:<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-rich is-provider-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Datacentrum WEDOS - Jedno z nejekologi\u010dt\u011bj\u0161\u00edch datacenter v \u010cR\" width=\"525\" height=\"295\" data-src=\"https:\/\/www.youtube.com\/embed\/0i7-Jd3-kkk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d to d\u011bl\u00e1me? M\u00e1 to smysl? Ur\u010dit\u011b!<\/h2>\n\n\n\n<p><strong>Nen\u00ed tedy tajemstv\u00edm, \u017ee d\u00edky na\u0161im \u00faspor\u00e1m dosahuj\u00ed re\u00e1ln\u00e9 finan\u010dn\u00ed \u00faspory m\u011bs\u00ed\u010dn\u011b stovky tis\u00edc korun.&nbsp;<\/strong>A to m\u00e1me server\u016f jen asi 240. Vezm\u011bte si situaci do budoucna&#8230; to budou miliony m\u011bs\u00ed\u010dn\u011b, kter\u00e9 my budeme m\u00edt a konkurence ne.<strong>&nbsp;Za rok to mohou b\u00fdt des\u00edtky milion\u016f korun, kter\u00e9 m\u016f\u017eeme investovat do rozvoje nebo do nov\u00fdch slu\u017eeb pro na\u0161e z\u00e1kazn\u00edky.<\/strong><\/p>\n\n\n\n<p><strong>Pro n\u00e1zornost lze uv\u00e9st to, \u017ee servery maj\u00ed aktu\u00e1ln\u011b spot\u0159ebu p\u0159es 50 kW ka\u017edou hodinu.<\/strong>V serverech m\u00e1me \u00fasporn\u00e9 procesory, ale bez nich by spot\u0159eba byla o v\u00edce ne\u017e 20 kW ka\u017edou hodinu vy\u0161\u0161\u00ed. Bez speci\u00e1ln\u00edch \u00fasporn\u00fdch server\u016f bychom m\u011bli spot\u0159ebu re\u00e1ln\u011b o des\u00edtky kW ka\u017edou hodinu vy\u0161\u0161\u00ed.<\/p>\n\n\n\n<p><strong>Pokud bychom nem\u011bli dal\u0161\u00ed \u00fasporn\u00e1 \u0159e\u0161en\u00ed, tak bychom finan\u010dn\u011b krv\u00e1celi.&nbsp;<\/strong>V\u017edy\u0165 bez studen\u00e9 uli\u010dky bychom zaplatili o stovky tis\u00edc korun m\u011bs\u00ed\u010dn\u011b ze elekt\u0159inu v\u00edce. Studen\u00e1 uli\u010dka znamen\u00e1 to, \u017ee studen\u00fd vzduch se vh\u00e1n\u00ed pod podlahu, kter\u00e1 je uzav\u0159en\u00e1 a m\u00e1 jen otvory (m\u0159\u00ed\u017ee) tam, kde chcete chladit. Tak\u017ee pod podlahou je chladn\u011bj\u0161\u00ed vzduch, kter\u00fd projde otvory z podlahy ven a je pou\u017eit pro chlazen\u00ed. Servery jsou uzav\u0159en\u00e9 ve v tzv. studen\u00e9 uli\u010dce do n\u00ed\u017e p\u0159ijde chladn\u00fd vzduch a nem\u00e1 kam uniknout, proto\u017ee uli\u010dka je uzav\u0159en\u00e1 ze v\u0161ech stran. Vzduch tedy mus\u00ed proj\u00edt do server\u016f a tam se oh\u0159eje a za servery je v\u00fdrazn\u011b tepleji, ne\u017e p\u0159ed nimi. Tepl\u00fd vzduch je ods\u00e1v\u00e1n a znovu zchlazen a pou\u017eit. Pod podlahou je tedy v\u00fdrazn\u011b chladn\u011bji, ne\u017e v samotn\u00e9m prostoru a tepl\u00fd a studen\u00fd vzduch se nem\u00edchaj\u00ed a nedoch\u00e1z\u00ed tak k energetick\u00fdm ztr\u00e1t\u00e1m.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d m\u00e1me n\u00e1\u0161 free-cooling&#8230;<\/h2>\n\n\n\n<p><strong>\u00daspory financ\u00ed jsou na prvn\u00edm m\u00edst\u011b. Nechceme \u0161idit slu\u017eby, ale chceme v\u0161e \u0159e\u0161it ekonomicky.&nbsp;<\/strong><\/p>\n\n\n\n<p>Pokud chlad\u00edte klimatizac\u00ed, tak se pou\u017e\u00edv\u00e1 st\u00e1le stejn\u00fd vzduch uvnit\u0159 serverovny, kter\u00fd cirkuluje a chlad\u00ed se v klimatizaci pomoc\u00ed kompresor\u016f. Je to drah\u00e9 a energeticky n\u00e1ro\u010dn\u00e9 \u0159e\u0161en\u00ed. V na\u0161em p\u0159\u00edpad\u011b, kdy\u017e servery produkuj\u00ed (spolu s UPSkami) cca 50 kW tepla ka\u017edou hodinu,<strong>pot\u0159ebujeme na chlazen\u00ed cca 33 kW elekt\u0159iny ka\u017edou hodinu<\/strong>&nbsp;&#8211; v p\u0159\u00edpad\u011b, \u017ee pou\u017eijeme klimatizaci.<\/p>\n\n\n\n<p><strong>Pokud pou\u017eijeme n\u00e1\u0161 free-cooling, tak je to cel\u00e9 jinak. Na uchlazen\u00ed 50 kW tepla posta\u010duje jen cca 2-12 kW elekt\u0159iny.<\/strong>&nbsp;V l\u00e9t\u011b je to v\u00edce a v chladn\u011bj\u0161\u00edch dnech nebo obdob\u00ed dne (v noci nebo r\u00e1no) je to v\u00fdrazn\u011b m\u00e9n\u011b. Nyn\u00ed to je kolem 2 kW ka\u017edou hodinu. V\u0161imn\u011bte si tedy, \u017ee u\u0161et\u0159\u00edme pr\u016fm\u011brn\u011b 30 kW elektrick\u00e9 energie ka\u017edou hodinu. Vyn\u00e1sobte si to po\u010dtem hodin za den, po\u010dtem dn\u00ed v roce a cenou elekt\u0159iny a zjist\u00edte, \u017ee \u00faspory jsou obrovsk\u00e9. V na\u0161em p\u0159\u00edpad\u011b jsou to aktu\u00e1ln\u011b \u010d\u00e1stky bl\u00ed\u017e\u00edc\u00ed se<strong>&nbsp;milionu korun ro\u010dn\u011b<\/strong>. S rostouc\u00edm po\u010dtem server\u016f to bude v\u00edce a v\u00edce.<\/p>\n\n\n\n<p>N\u00e1\u0161 free-cooling jsme nainstalovali letos v zim\u011b a funguje skv\u011ble. Investice to byla vysok\u00e1 (celkov\u011b se to bl\u00ed\u017eilo k milionu korun), ale u\u017e se n\u00e1m zaplatil.<\/p>\n\n\n\n<p>V datacentru m\u00e1me d\u00e1le 6 klimatiza\u010dn\u00edch jednotek, p\u0159i\u010dem\u017e ka\u017ed\u00e1 m\u00e1 chlad\u00edc\u00ed v\u00fdkon 89 kW.&nbsp;<strong>Tak\u017ee m\u00e1me obrovsk\u00e9 rezervy a i redundanci na\u0161eho free-coolingu.&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak tedy funguje?<\/h2>\n\n\n\n<p><strong>N\u00e1\u0161 free-cooling nefunguje tak jak bylo uvedeno v \u010dl\u00e1nku.<\/strong>&nbsp;Nen\u00ed to tak, \u017ee se na jedn\u00e9 stran\u011b nas\u00e1v\u00e1 vzduch zvenku a na druh\u00e9 stran\u011b ods\u00e1v\u00e1 ven.<strong>&nbsp;Je to pom\u011brn\u011b slo\u017eit\u00fd mechanismus, kter\u00fd jsme sami speci\u00e1ln\u011b pro tento \u00fa\u010del navrhli.<\/strong><\/p>\n\n\n\n<p>V z\u00e1sad\u011b lze \u0159\u00edci, \u017ee vzduchotechnika (free-cooling) zaji\u0161\u0165uje cirkulaci vzduchu v cel\u00e9m prostoru serverovny. A do n\u011bj je pomoc\u00ed klapek dle aktu\u00e1ln\u00ed situace p\u0159im\u00edch\u00e1v\u00e1n studen\u011bj\u0161\u00ed vzduch zvenku a teplej\u0161\u00ed odv\u00e1d\u011bn ven (a nov\u011b je tak\u00e9 tepl\u00fd odv\u00e1d\u011bn do horn\u00edho patra pro vyt\u00e1p\u011bn\u00ed kancel\u00e1\u0159\u00ed).<\/p>\n\n\n\n<p>Na mnoha m\u00edstech&nbsp;<strong>po cel\u00e9 serverovn\u011b (a i vn\u011b budovy a v potrub\u00ed a pod podlahou) jsou teplotn\u00ed (a vlhkostn\u00ed) \u010didla, kter\u00e1 v\u0161e hl\u00eddaj\u00ed&nbsp;<\/strong>a cel\u00fd ovl\u00e1dac\u00ed syst\u00e9m (zalo\u017een\u00fd na sb\u011brnici KNX = \u0159\u00edzen\u00ed cel\u00e9 serverovny centr\u00e1ln\u011b z PC v\u010detn\u011b ovl\u00e1d\u00e1n\u00ed sv\u011btel a z\u00e1suvek)&nbsp;<strong>podle toho upravuje nastaven\u00ed klapek a ot\u00e1\u010dek nas\u00e1vac\u00edho a ods\u00e1vac\u00edho motoru<\/strong>.<\/p>\n\n\n\n<p><strong>Ve v\u00fdsledku je tedy teplota na vstupu do server\u016f stabiln\u00ed, rozhodn\u011b nikdy nedoch\u00e1z\u00ed ke skokov\u00fdm zm\u011bn\u00e1m.<\/strong>&nbsp;Teplota uvnit\u0159 nekop\u00edruje teplotu vn\u011b. Syst\u00e9m klapek a p\u0159im\u00edch\u00e1v\u00e1n\u00ed vzduchu to hl\u00edd\u00e1. P\u0159esnost je z\u00e1visl\u00e1 jen na tom, jak si to nastav\u00edme.&nbsp;<strong>Aktu\u00e1ln\u011b m\u00e1me povolenou zm\u011bnu teploty 0,6 stupn\u011b, co\u017e je p\u0159esn\u011bj\u0161\u00ed, ne\u017e jak\u00e1koliv komer\u010dn\u00ed klimatizace.&nbsp;<\/strong>M\u00e1me vyzkou\u0161eno i v\u0161e s p\u0159esnost\u00ed na 0,1 stupn\u011b a funguje to.<\/p>\n\n\n\n<p><strong>Pokud je venkovn\u00ed teplota vysok\u00e1, free-cooling se vypne a zapne se klimatizace<\/strong>. To se d\u011bje pln\u011b automaticky bez lidsk\u00e9ho z\u00e1sahu. V leto\u0161n\u00edm mimo\u0159\u00e1dn\u011b hork\u00e9m l\u00e9t\u011b jsme klimatizaci pou\u017eili maxim\u00e1ln\u011b 100 hodin a to v\u017edy jen v pr\u016fb\u011bhu odpoledn\u00ed \u0161pi\u010dky a v podve\u010der se chlazen\u00ed zase p\u0159epnulo samo z klimatizace na free-cooling. Pr\u016fm\u011brn\u00e1 ro\u010dn\u00ed telota v Hlubok\u00e9 se pohybuje kolem 9 stup\u0148\u016f. Tak to bez probl\u00e9m\u016f m\u016f\u017eeme pou\u017e\u00edvat free-cooling.<\/p>\n\n\n\n<p>Vzhledem k tomu, \u017ee na\u0161e datacentrum je b\u00fdval\u00fd kryt civiln\u00ed obrany (pro p\u0159\u00edpad v\u00e1lky) a je \u010d\u00e1ste\u010dn\u011b pod zem\u00ed a v centru m\u011bsta (v z\u00e1stavb\u011b obytn\u00fdch a administrativn\u00edch budov), tak \u0159e\u0161\u00edme hlu\u010dnost.<strong>&nbsp;V syst\u00e9mu free-coolingu jsou speci\u00e1ln\u00ed tlumi\u010de hluku, aby venkovn\u00ed hluk nebyl vy\u0161\u0161\u00ed, ne\u017e 40 decibel\u016f (i modern\u00ed ledni\u010dka je hlu\u010dn\u011bj\u0161\u00ed).<\/strong><\/p>\n\n\n\n<p>N\u00e1\u0161 free-cooling je nyn\u00ed osazen motory, kter\u00e9 zaji\u0161\u0165uj\u00ed v\u00fdm\u011bnu vzduchu o objemu 30 000 m3\/hod.&nbsp;<strong>Ano, ka\u017edou hodinu se uvnit\u0159 serverovny &#8222;proto\u010d\u00ed&#8220; 30 000 000 litr\u016f vzduchu.&nbsp;<\/strong>\u010c\u00e1st chladn\u00e9ho je nas\u00e1v\u00e1na z venkovn\u00edch prostor, \u010d\u00e1st je vnit\u0159n\u00ed (podle toho, jak je venku teplo a vlhko).<strong>&nbsp;V\u0161e se \u0159\u00edd\u00ed ve sm\u011b\u0161ovac\u00ed komo\u0159e na p\u0159esnou teplotu.<\/strong><\/p>\n\n\n\n<p>Cel\u00fd syst\u00e9m je ovl\u00e1d\u00e1n automaticky z PC, v\u0161e je propojeno s klimatizac\u00ed a v\u0161e funguje bez z\u00e1sahu lidsk\u00e9 ruky.&nbsp;<\/p>\n\n\n\n<p><strong>Free-cooling je osazen protipo\u017e\u00e1rn\u00edmi klapkami<\/strong>, kter\u00e9 zajist\u00ed hermetick\u00e9 uzav\u0159en\u00ed prostoru datov\u00e9ho s\u00e1lu od ostatn\u00edch prostor v p\u0159\u00edpad\u011b po\u017e\u00e1ru. Klapky jsou ovl\u00e1dan\u00e9 elektronicky p\u0159\u00edmo z \u00fast\u0159edny stabiln\u00edho has\u00edc\u00edho syst\u00e9mu, ale jsou tak\u00e9 osazeny p\u0159\u00edmo tepeln\u00fdmi pojistkami a zav\u0159ou se sami, kdy\u017e by elektronika selhala.&nbsp;<\/p>\n\n\n\n<p><strong>Free-cooling je navr\u017een\u00fd tak, \u017ee jej lze pou\u017e\u00edvat a\u017e do 33 stup\u0148\u016f tepla venku.&nbsp;<\/strong>Servery jsou certifikovan\u00e9 na 33 stup\u0148\u016f p\u0159\u00edchoz\u00edho vzduchu. My free-cooling pou\u017e\u00edv\u00e1me do cca 28 stup\u0148\u016f, proto\u017ee potom servery zapnou dal\u0161\u00ed ventil\u00e1tory a t\u00edm roste spot\u0159eba. A vyplat\u00ed se chladit klimatizac\u00ed. Sami moc dob\u0159e v\u00edte, kolik dn\u00ed (nebo sp\u00ed\u0161e hodin) je ro\u010dn\u011b v\u00edce, ne\u017e 28 stup\u0148\u016f ve st\u00ednu&#8230;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co je tedy \u0161patn\u011b (l\u017eiv\u011b) v \u010dl\u00e1nku?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Filtrace<\/h3>\n\n\n\n<p>Filtraci samoz\u0159ejm\u011b \u0159e\u0161\u00edme.&nbsp;<strong>Po\u0159\u00eddili jsme velmi drah\u00e9 filtry a pravideln\u011b se m\u011bn\u00ed.&nbsp;<\/strong>M\u00e1me na to sjednanou servisn\u00ed firmu, kter\u00e1 v\u0161e zaji\u0161\u0165uje a nemus\u00edme se o nic starat. Na Hlubok\u00e9 je nav\u00edc pom\u011brn\u011b \u010disto \ud83d\ude42 . Nic jsme v\u0161ak nepodcenili.&nbsp;P\u0159ije\u010fte se pod\u00edvat a uvid\u00edte, \u017ee nikde \u017e\u00e1dn\u00fd prach nen\u00ed :-).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vznikaj\u00edc\u00ed hot-spoty<\/h3>\n\n\n\n<p>P\u0159edstavte si, \u017ee se ka\u017edou hodinu v prostoru cca 250 m2 h\u00fdbou 3 miliony litr\u016f vzduchu. P\u011bkn\u00fd pr\u016fvan. Tak\u017ee<strong>&nbsp;teplota se p\u011bkn\u011b prom\u00edch\u00e1 a nejsou \u017e\u00e1dn\u00e1 kritick\u00e1 m\u00edsta<\/strong>. Proud\u011bn\u00ed vzduchu je tak siln\u00e9, \u017ee unese pap\u00edrov\u00e9 krabice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Prudk\u00e9 zm\u011bny teplot<\/h3>\n\n\n\n<p>Jak ji\u017e bylo uvedeno, tak takov\u00e9 probl\u00e9my nehroz\u00ed.&nbsp;<strong>Syst\u00e9m je p\u0159esn\u011bj\u0161\u00ed, ne\u017e komer\u010dn\u00ed klimatizace za miliony korun.&nbsp;<\/strong>Je to d\u00e1no t\u00edm, \u017ee regulujeme nejen pom\u011br p\u0159\u00edchoz\u00edho chladn\u00e9ho vzduchu, ale i jeho proud\u011bn\u00ed. V\u0161e je \u0159\u00edzeno precizn\u011b tak, \u017ee se \u0159\u00edd\u00ed nejen ot\u00e1\u010dky obou motor\u016f (p\u0159\u00edvod a odtah), ale i vzduchotechnick\u00e9 klapky pomoc\u00ed servopohon\u016f. Klapky \u0159\u00edd\u00ed nejen objem vzduchu p\u0159ich\u00e1zej\u00edc\u00edho z venku, ale tak\u00e9 pom\u011br m\u00ed\u0161en\u00ed s odch\u00e1zej\u00edc\u00edm tepl\u00fdm a tak\u00e9 nastaven\u00edm klapek \u0159\u00edd\u00edme kolik vzduchu jde ven z budovy a kolik ho m\u00e1 cirkulovat uvnit\u0159 datov\u00e9ho s\u00e1lu.<\/p>\n\n\n\n<p>D\u016fkaz (graf teplot za 2 dny, jsou to p\u0159esn\u00e9 teploty hl\u00e1\u0161en\u00e9 p\u0159i jak\u00e9koliv zm\u011bn\u011b a nejde tedy o pr\u016fm\u011br za n\u011bkolik minut):<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"497\" height=\"173\" data-src=\"https:\/\/blog.wedos.cz\/wp-content\/uploads\/2020\/08\/domotiga-pod-den.png\" alt=\"\" class=\"wp-image-40235 lazyload\" data-srcset=\"https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/domotiga-pod-den.png 497w, https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/domotiga-pod-den-300x104.png 300w\" data-sizes=\"(max-width: 497px) 100vw, 497px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 497px; --smush-placeholder-aspect-ratio: 497\/173;\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Vlhkost prost\u0159ed\u00ed<\/h3>\n\n\n\n<p><strong>Na mnoha m\u00edstech serverovny (+ venku + pod podlahou + v potrub\u00ed) m\u00e1me \u010didla vlhkosti a hl\u00edd\u00e1me, \u017ee se pohybujeme v mez\u00edch, kter\u00fd dovoluj\u00ed servery.&nbsp;<\/strong>Pokud by se tak nestalo, lze free-cooling odstavit, respektive dojde k automatick\u00e9mu odstaven\u00ed.<\/p>\n\n\n\n<p><strong>Probl\u00e9my s nedostate\u010dnou vlhkost\u00ed nejsou<\/strong>, proto\u017ee jak zn\u00e1mo, tak venku je mnohem vlh\u010d\u00ed vzduch, ne\u017e v prostor\u00e1ch, kter\u00e9 jsou chlazen\u00e9 \u010dist\u011b klimatizac\u00ed. Proto datov\u00e9 s\u00e1ly, kter\u00e9 jsou chlazen\u00e9 jen klimatizac\u00ed musej\u00ed byt um\u011ble zvlh\u010dov\u00e1ny. U free-coolingu je to naopak. Mus\u00edte hl\u00eddat, aby vlhkost nepr\u0159ekro\u010dila ur\u010dit\u00e9 meze. To samoz\u0159ejm\u011b hl\u00edd\u00e1me &#8211; op\u011bt pomoc\u00ed klapek. Sta\u010d\u00ed m\u00e1lo, proto\u017ee zm\u011bn\u00edte pom\u011br odchoz\u00edcho (such\u00e9ho) a p\u0159\u00edchoz\u00edho (vlhk\u00e9ho) vzduchu a m\u00e1te spr\u00e1vn\u00e9 hodnoty. V p\u0159\u00edpad\u011b, \u017ee by to nedosta\u010dovalo, tak se free-cooling vypne a na chvilku se pust\u00ed klimatizace, kter\u00e1 zajist\u00ed odvlh\u010den\u00ed. Nikdy jsme to v\u0161ak zat\u00edm nepot\u0159ebovali. Statick\u00e1 elekt\u0159ina je odv\u00e1d\u011bna pomoc\u00ed antistatick\u00e9 podlahy, kter\u00e1 je cel\u00e1 uzemn\u011bn\u00e1 (stejn\u011b jako racky).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Free-cooling WEDOS je sotisfikovan\u00e9 za\u0159\u00edzen\u00ed na \u0161pi\u010dkov\u00e9 \u00farovni<\/h2>\n\n\n\n<p>N\u00e1\u0161 free-cooling je sice n\u00e1\u0161 &#8222;vyn\u00e1lez&#8220;, ale vych\u00e1z\u00ed z 16 let zku\u0161enost\u00ed. Funguje skv\u011ble. Nem\u016f\u017eeme si st\u011b\u017eovat.<strong>\u00a0V\u0161e je pln\u011b automatick\u00e9, spolehliv\u00e9 a p\u0159esn\u00e9. Provozn\u011b levn\u011bj\u0161\u00ed, ne\u017e jak\u00e9koliv komer\u010dn\u00ed \u0159e\u0161en\u00ed, kter\u00e9 jsme hledali na trhu.<\/strong>U\u017e se o n\u00e1\u0161 syst\u00e9m zaj\u00edmalo n\u011bkolik komer\u010dn\u00edch firem, kter\u00e9 se zab\u00fdvaj\u00ed chlazen\u00edm a stejn\u011b tak i provozovatel\u00e9 datov\u00fdch center.\u00a0Tady m\u00e1te video, jak free-cooling chlad\u00ed p\u0159i 27 stupn\u00edch venkovn\u00ed teploty. Bez probl\u00e9m\u016f. Spolehliv\u011b.\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Free-cooling WEDOS p\u0159i t\u00e9m\u011b\u0159 27 stupn\u00edch venku\" width=\"525\" height=\"295\" data-src=\"https:\/\/www.youtube.com\/embed\/4Br4mONgxOk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Co chyst\u00e1me d\u00e1le?<\/h2>\n\n\n\n<p><strong>U\u017e nyn\u00ed testujeme olejov\u00e9 chlazen\u00ed. Testujeme servery, kter\u00e9 jsou pono\u0159en\u00e9 v oleji a chlad\u00ed se pomoc\u00ed oleje (a ne vzduchu).<\/strong>\u00a0Jak\u00e9 to m\u00e1 v\u00fdhody? Dal\u0161\u00ed obrovsk\u00e9 energetick\u00e9 \u00faspory. Olej odv\u00e1d\u00ed teplo cca 300x l\u00e9pe, ne\u017e vzduch. Na odvod tepla pot\u0159ebujete m\u00e9n\u011b energie. Tepla vyprodukujete m\u00e9n\u011b, proto\u017ee ze server\u016f vynd\u00e1te v\u0161echny ventil\u00e1tory, co\u017e m\u016f\u017ee b\u00fdt a\u017e 50% spot\u0159eby cel\u00e9ho serveru. Server je dokonale plo\u0161n\u011b chlazen a tak m\u016f\u017ee b\u00fdt p\u0159etaktov\u00e1n. Server nen\u00ed v prachu, nejsou tam ot\u0159esy (olej je pohlt\u00ed) a v neposledn\u00ed \u0159ad\u011b se d\u011blaj\u00ed i neho\u0159lav\u00e9 verze oleje. Ano, i tohle u WEDOS zkou\u0161\u00edme a re\u00e1ln\u011b chceme nasadit do ostr\u00e9ho provozu.\u00a0<strong>Tady m\u00e1te uk\u00e1zku na\u0161eho videa se serverem v oleji:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Z Laborato\u0159\u00ed WEDOS... uniklo supertajn\u00e9 video... :-)\" width=\"525\" height=\"394\" data-src=\"https:\/\/www.youtube.com\/embed\/WXxV7xWXF48?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Co bude n\u00e1sledovat?<\/h3>\n\n\n\n<p>Uvid\u00edme co autor nap\u00ed\u0161e dal\u0161\u00edho<strong>. U\u017e se t\u011b\u0161\u00edme. Mus\u00edme mu hodn\u011b vadit. V podstat\u011b n\u00e1m sv\u00fdmi \u010dl\u00e1nky d\u011bl\u00e1 reklamu, proto\u017ee my snadno vysv\u011btl\u00edme v\u0161echny l\u017ei, kter\u00e9 jsou v jednotliv\u00fdch \u010dl\u00e1nc\u00edch.<\/strong><\/p>\n\n\n\n<p>Jsme r\u00e1di, \u017ee n\u011bkomu takhle vad\u00edme a \u017ee n\u00e1m v\u011bnuje tolik \u010dasu.&nbsp;<strong>Je vid\u011bt, \u017ee d\u011bl\u00e1me svoji pr\u00e1ci dob\u0159e<\/strong>. Moc dob\u0159e. Je to pro n\u00e1s reklama. D\u00edky tomu, \u017ee se o n\u00e1s mluv\u00ed a p\u00ed\u0161e, tak se zase staneme popul\u00e1rn\u011bj\u0161\u00edmi a budeme zase \u00fasp\u011b\u0161n\u011bj\u0161\u00ed.<\/p>\n\n\n\n<p>Snad jen, aby si lid\u00e9 nemysleli, \u017ee si tuhle antikampa\u0148 d\u011bl\u00e1me sami, abychom se mohli zviditelnit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vzkaz pro autora antikampan\u011b<\/h2>\n\n\n\n<p><strong>Nemus\u00edte se za svou identitu styd\u011bt. Nemus\u00edte pou\u017e\u00edvat fale\u0161n\u00e9 jm\u00e9no a p\u0159\u00edjmen\u00ed.&nbsp;<\/strong>V\u00e1\u017en\u011b byste se necht\u011bli, ne\u017e o n\u00e1s budete ps\u00e1t dal\u0161\u00ed \u010dl\u00e1nky, k n\u00e1m p\u0159ijet pod\u00edvat? Zjevn\u011b jste u n\u00e1s nikdy nebyli, d\u00e1v\u00e1te si dohromady informace z Internetu a spoustu v\u011bc\u00ed si dom\u00fd\u0161l\u00edte. Tak\u017ee si tu d\u011bl\u00e1te jen ostudu.<\/p>\n\n\n\n<p>My se kritiky neboj\u00edme. Um\u00edme se k n\u00ed postavit \u010delem.<\/p>\n\n\n\n<p><strong>V\u016fbec nech\u00e1peme, jak zde m\u016f\u017eete uv\u00e1d\u011bt z\u00e1v\u011bry, kdy\u017e jste ten syst\u00e9m nikdy nevid\u011bli a nev\u00edte jak funguje.&nbsp;<\/strong>Vy si p\u0159edstavujete, \u017ee syst\u00e9m d\u011bl\u00e1 jen oby\u010dejn\u00fd \u201cpr\u016fvan\u201d velkovn\u00edho vzduchu skrz m\u00edstnost. Ne, vlastn\u011b to ch\u00e1peme. Kdy\u017e je konkurence zoufal\u00e1, p\u0159istoup\u00ed p\u0159esn\u011b na toto&#8230;<\/p>\n\n\n\n<p><strong>My se nem\u00e1me za co styd\u011bt. Free-cooling funguje p\u0159esn\u011b jak m\u00e1 a \u0161et\u0159\u00ed n\u00e1m stovky tis\u00edc m\u011bs\u00ed\u010dn\u011b na n\u00e1kladech za jak\u00e9koliv jin\u00e9 \u0159e\u0161en\u00ed chlazen\u00ed&#8230;<\/strong><\/p>\n\n\n\n<p>Nev\u011b\u0159\u00edte? Ozv\u011bte se, p\u0159ije\u010fte, uk\u00e1\u017eeme komukoliv. Masarykova 1230, Hlubok\u00e1 nad Vltavou.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Na co reagujeme?<\/h2>\n\n\n\n<p>Zde je screenshot \u010dl\u00e1nku na kter\u00fd reagujeme. Autor antikampan\u011b \u010dl\u00e1nky pr\u016fb\u011b\u017en\u011b upravuje, aby nebyl &#8222;za blbce&#8220;. Tak se nedivte :-).<\/p>\n\n\n\n<p>N\u00ed\u017ee je screenshot webu, na kter\u00fd reagujeme (jen pro zachov\u00e1n\u00ed). P\u0159edpokl\u00e1d\u00e1me, \u017ee toto je sou\u010d\u00e1st konkuren\u010dn\u00edho boje, a tak bude d\u016fkaz d\u0159\u00edve, ne\u017e dojde ke zm\u011bn\u00e1m.<\/p>\n\n\n\n<p>N\u00e1\u0161 \u00fadajn\u00fd zam\u011bstnanec si zalo\u017eil str\u00e1nky\u00a0<strong>wxxxxyyyg.com<\/strong>\u00a0(adresa upravena a screenshot je zde na konci \u010dl\u00e1nku). V prvn\u00edm \u010dl\u00e1nku informuje o tom, jak to m\u00e1me \u0161patn\u011b s nap\u00e1jen\u00edm. V dal\u0161\u00edm jsme se dozv\u011bd\u011bli zase jin\u00e9 informace.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"444\" height=\"1024\" data-src=\"https:\/\/blog.wedos.cz\/wp-content\/uploads\/2020\/08\/wedos-pomluva3-444x1024.png\" alt=\"\" class=\"wp-image-40239 lazyload\" data-srcset=\"https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/wedos-pomluva3-444x1024.png 444w, https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/wedos-pomluva3-130x300.png 130w, https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/wedos-pomluva3-768x1773.png 768w, https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/wedos-pomluva3-887x2048.png 887w, https:\/\/blog.wedos.com\/wp-content\/uploads\/2020\/08\/wedos-pomluva3.png 1106w\" data-sizes=\"(max-width: 444px) 100vw, 444px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 444px; --smush-placeholder-aspect-ratio: 444\/1024;\" \/><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tak tady m\u00e1me dal\u0161\u00ed \u010dl\u00e1nek v r\u00e1mci kampan\u011b proti WEDOS. Autor u\u017e netvrd\u00ed, \u017ee je na\u0161\u00edm zam\u011bstnancem, ale pou\u0161t\u00ed se do dal\u0161\u00edho l\u017eiv\u00e9ho tvrzen\u00ed proti n\u00e1m.\u00a0<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-40232","post","type-post","status-publish","format-standard","hentry","category-spolecnost"],"_links":{"self":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/40232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/comments?post=40232"}],"version-history":[{"count":1,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/40232\/revisions"}],"predecessor-version":[{"id":40250,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/40232\/revisions\/40250"}],"wp:attachment":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/media?parent=40232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/categories?post=40232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/tags?post=40232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}