{"id":2432,"date":"2013-03-20T16:42:50","date_gmt":"2013-03-20T15:42:50","guid":{"rendered":"http:\/\/blog.websupport.cz\/?p=2432"},"modified":"2025-03-11T21:18:16","modified_gmt":"2025-03-11T20:18:16","slug":"prohlednete-si-nas-nejnovejsi-rack","status":"publish","type":"post","link":"https:\/\/www.websupport.cz\/blog\/2013\/03\/prohlednete-si-nas-nejnovejsi-rack\/","title":{"rendered":"Prohl\u00e9dn\u011bte si n\u00e1\u0161 nejnov\u011bj\u0161\u00ed rack"},"content":{"rendered":"<p>V posledn\u00ed dob\u011b p\u0159id\u00e1v\u00e1me ve velk\u00e9m dal\u0161\u00ed \u017eelezo do servroven. Do nov\u00fdch rack\u016f zav\u00e1d\u00edme technologie, jak\u00e9 jsme dosud nepou\u017e\u00edvali. Vzhledem k tomu, \u017ee testov\u00e1n\u00ed a optimalizaci v\u011bnujeme spoustu \u010dasu, r\u00e1di bychom v\u00e1m uk\u00e1zali, s \u010d\u00edm vlastn\u011b pracujeme a co v\u0161echno v takov\u00e9m racku je.<br \/>\n<!--more--><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3366\" title=\"Mail server\" src=\"http:\/\/blog.websupport.sk\/wp-content\/uploads\/2012\/12\/3h.jpg\" alt=\"Mail server\" width=\"517\" height=\"82\" \/><br \/>\nN\u00e1\u0161 v po\u0159ad\u00ed u\u017e \u010dtvrt\u00fd mailserver, kter\u00fd je ur\u010den jen pro p\u0159\u00edchoz\u00ed po\u0161tu. Jde tedy vlastn\u011b o IMAP\/POP3 server. Jeho p\u0159\u00edprava a testov\u00e1n\u00ed zabrala p\u0159es dva m\u011bs\u00edce. Jsou v n\u011bm pou\u017eit\u00e9 nov\u00e9 technologie, \u00fapln\u011b jin\u00e9 ne\u017e v na\u0161ich dosavadn\u00edch mailov\u00fdch serverech. Mezi t\u0159i hlavn\u00ed novinky pat\u0159\u00ed ur\u010dit\u011b:<\/p>\n<ul>\n<li><strong>Souborov\u00fd syst\u00e9m ZFS<\/strong> &#8211; Umo\u017e\u0148uje kompresi e-mail\u016f metodou gzip, d\u00edky \u010demu\u017e zaberou ulo\u017een\u00e9 maily zhruba 60% p\u016fvodn\u00ed velikosti. Re\u00e1ln\u011b jsme takto dok\u00e1zali zredukovat 5,3 TB dat na 3,34 TB. Komprese rovn\u011b\u017e znamen\u00e1 men\u0161\u00ed po\u010det zapisovan\u00fdch a \u010dten\u00fdch dat, a tedy i men\u0161\u00ed po\u010det I\/O operac\u00ed. Celkem m\u00e1 ZFS vlastnost\u00ed na n\u011bkolik stran a v\u00edce se o n\u011bm m\u016f\u017eete dozv\u011bd\u011bt z <a title=\"P\u0159edn\u00e1\u0161ka o ZFS\" href=\"http:\/\/hub.opensolaris.org\/bin\/download\/Community+Group+zfs\/docs\/zfslast.pdf\" target=\"_blank\">vynikaj\u00edc\u00ed p\u0159edn\u00e1\u0161ky<\/a><\/li>\n<li><strong>RAID10<\/strong> &#8211; Lep\u0161\u00ed \u0159e\u0161en\u00ed pro z\u00e1t\u011b\u017e mailov\u00e9ho serveru ne\u017e dosud pou\u017e\u00edvan\u00fd RAID5. RAID5 toti\u017e nen\u00ed ide\u00e1ln\u00ed pro pr\u00e1ci s mal\u00fdmi soubory, a t\u011bch je na mailserveru hodn\u011b.<\/li>\n<li><strong>L2ARC <\/strong>&#8211; Tato technologie pom\u00e1h\u00e1 cachovat data souborov\u00e9ho syst\u00e9mu na nainstalovan\u00e9 flashce (v PCI slotu um\u00edst\u011bn\u00e1 100GB Flash karta).  S disky se tedy pracuje a\u017e ve chv\u00edli, kdy po\u017eadovan\u00e1 data nejsou ani v 32GB ARC cache, ani ve 100GB L2ARC cache. P\u0159e\u010dt\u011bte si <a title=\"Viac o L2ARC\" href=\"https:\/\/blogs.oracle.com\/brendan\/entry\/test\" target=\"_blank\">v\u00edc o L2ARC<\/a>.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3364\" title=\"coreswitche\" src=\"http:\/\/blog.websupport.sk\/wp-content\/uploads\/2012\/12\/1h.jpg\" alt=\"coreswitche\" width=\"517\" height=\"196\" \/><br \/>\nJako core switche jsou pou\u017eit\u00e9 dva Cisco WS-C3750X-48. Siln\u00e9 kabely, kter\u00fdmi jsou propojeny, jsou ur\u010den\u00e9 k vytvo\u0159en\u00ed stacku. Ten umo\u017e\u0148uje vid\u011bt dva 48portov\u00e9 switche jako jedno za\u0159\u00edzen\u00ed, jako jeden 96portov\u00fd switch. To zjednodu\u0161uje spr\u00e1vu a umo\u017e\u0148uje \u0161k\u00e1lovat p\u0159ep\u00ednanou kapacitu p\u0159id\u00e1v\u00e1n\u00edm dal\u0161\u00edch switch\u016f za b\u011bhu.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3365\" title=\"blade skrinka\" src=\"http:\/\/blog.websupport.sk\/wp-content\/uploads\/2012\/12\/2h.jpg\" alt=\"blade skrinka\" width=\"517\" height=\"219\" \/><br \/>\nZhruba dva roky jsou v\u0161echny na\u0161e servery ve form\u011b blade server\u016f od spole\u010dnosti Supermicro. Sk\u0159\u00ed\u0148 blade pot\u0159ebuje \u010dty\u0159i 1620W zdroje, aby byla schopn\u00e1 ut\u00e1hnout 14 server\u016f p\u0159i pln\u00e9m nasazen\u00ed. Samoz\u0159ejmost\u00ed je redundance na \u00farovni N+1, tak\u017ee pokud se pokaz\u00ed jeden zdroj, nic se ned\u011bje a sk\u0159\u00ed\u0148 funguje d\u00e1l.<\/p>\n<p>V\u00fdhodou je vy\u0161\u0161\u00ed integrace server\u016f, kter\u00e1 p\u0159i v\u00fd\u0161ce blade sk\u0159\u00edn\u011b 7U vych\u00e1z\u00ed 2 servery na 1U. <a title=\"Nev\u00edte co je to U?\" href=\"http:\/\/en.wikipedia.org\/wiki\/Rack_unit\" target=\"_blank\">Nev\u00edte co je to U?<\/a><\/p>\n<p>Na obr\u00e1zku vid\u00edte u\u017e i osazen\u00fd prvn\u00ed server xendb5, ur\u010den\u00fd pro b\u011bh datab\u00e1zov\u00fdch server\u016f na virtualiza\u010dn\u00ed plaform\u011b Xen se t\u0159emi SSD disky. Osazen\u00e1 sk\u0159\u00ed\u0148ka je u\u017e t\u0159et\u00ed v po\u0159ad\u00ed a blade server\u016f m\u00e1me celkem u\u017e 29.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3367\" title=\"backup server\" src=\"http:\/\/blog.websupport.sk\/wp-content\/uploads\/2012\/12\/4h.jpg\" alt=\"beckup server\" width=\"517\" height=\"150\" \/><\/p>\n<p>Na technologii ZFS, kterou jsme pou\u017eili u mailserver\u016f, je postaven\u00fd i n\u00e1\u0161 nov\u00fd backup server. Technologie ZFS si velmi dob\u0159e rozum\u00ed s mnohadiskov\u00fdmi servery. Na obr\u00e1zku je konkr\u00e9tn\u011b SuperStorage Server 6047R-E1R36N, jeho\u017e zvl\u00e1\u0161tnost\u00ed je um\u00edst\u011bn\u00ed dal\u0161\u00edch 12 pozic\u00ed na disky v zadn\u00ed \u010d\u00e1sti serveru. <a title=\"ilustracia\" href=\"http:\/\/www.supermicro.nl\/a_images\/products\/chassis\/4U\/SC847E16-R1K28LPB_spec.jpg\" target=\"_blank\">V\u00edc m\u016f\u017eete vid\u011bt zde.<\/a><\/p>\n<p>D\u00edky tomu m\u016f\u017eeme p\u0159ipojovat dal\u0161\u00ed diskov\u00e9 pole, jak je vid\u011bt na obr\u00e1zku, kde u\u017e se nach\u00e1z\u00ed diskov\u00e9 pole Promise Vtrak E310i s dal\u0161\u00edmi 12 pozicemi. V kone\u010dn\u00e9m nastaven\u00ed bude k backup serveru p\u0159ipojeno je\u0161t\u011b jedno takov\u00e9 pole, tak\u017ee ve fin\u00e1le bude m\u00edt backup server a\u017e 60 pozic pro disky.<\/p>\n<p>Nov\u00e9 racky jsou jen jedna z v\u011bc\u00ed, na kter\u00fdch v r\u00e1mci zlep\u0161ov\u00e1n\u00ed kvality aktu\u00e1ln\u011b pracujeme. Budeme pravideln\u011b p\u0159ipravovat blogposty s informacemi o dal\u0161\u00edch vylep\u0161en\u00edch a nov\u00fdch technologi\u00edch.<br \/>\nSO, STAY TUNED!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3368\" title=\"komplet rack\" src=\"http:\/\/blog.websupport.sk\/wp-content\/uploads\/2012\/12\/server.jpg\" alt=\"komplet rack\" width=\"517\" height=\"459\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V posledn\u00ed dob\u011b p\u0159id\u00e1v\u00e1me ve velk\u00e9m dal\u0161\u00ed \u017eelezo do servroven. Do nov\u00fdch rack\u016f zav\u00e1d\u00edme technologie, jak\u00e9 jsme dosud nepou\u017e\u00edvali. Vzhledem k tomu, \u017ee testov\u00e1n\u00ed a optimalizaci v\u011bnujeme spoustu \u010dasu, r\u00e1di bychom v\u00e1m uk\u00e1zali, s \u010d\u00edm vlastn\u011b pracujeme a co v\u0161echno v takov\u00e9m racku je.<\/p>\n","protected":false},"author":1,"featured_media":2459,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[208,13],"class_list":["post-2432","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","tag-racky","tag-servery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Prohl\u00e9dn\u011bte si n\u00e1\u0161 nejnov\u011bj\u0161\u00ed rack - Websupport.cz Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.websupport.cz\/blog\/2013\/03\/prohlednete-si-nas-nejnovejsi-rack\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prohl\u00e9dn\u011bte si n\u00e1\u0161 nejnov\u011bj\u0161\u00ed rack - Websupport.cz Blog\" \/>\n<meta property=\"og:description\" content=\"V posledn\u00ed dob\u011b p\u0159id\u00e1v\u00e1me ve velk\u00e9m dal\u0161\u00ed \u017eelezo do servroven. Do nov\u00fdch rack\u016f zav\u00e1d\u00edme technologie, jak\u00e9 jsme dosud nepou\u017e\u00edvali. Vzhledem k tomu, \u017ee testov\u00e1n\u00ed a optimalizaci v\u011bnujeme spoustu \u010dasu, r\u00e1di bychom v\u00e1m uk\u00e1zali, s \u010d\u00edm vlastn\u011b pracujeme a co v\u0161echno v takov\u00e9m racku je.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.websupport.cz\/blog\/2013\/03\/prohlednete-si-nas-nejnovejsi-rack\/\" \/>\n<meta property=\"og:site_name\" content=\"Websupport.cz Blog\" \/>\n<meta property=\"article:published_time\" content=\"2013-03-20T15:42:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-03-11T20:18:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.websupport.cz\/blog\/app\/uploads\/2013\/03\/blog_superblade_nizsi_header.png\" \/>\n\t<meta property=\"og:image:width\" content=\"517\" \/>\n\t<meta property=\"og:image:height\" content=\"112\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Websupport.cz\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napsal(a)\" \/>\n\t<meta name=\"twitter:data1\" content=\"Websupport.cz\" \/>\n\t<meta name=\"twitter:label2\" content=\"Odhadovan\u00e1 doba \u010dten\u00ed\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/\"},\"author\":{\"name\":\"Websupport.cz\",\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/#\\\/schema\\\/person\\\/be8a57f48495cd69e6ebef3e22d82617\"},\"headline\":\"Prohl\u00e9dn\u011bte si n\u00e1\u0161 nejnov\u011bj\u0161\u00ed rack\",\"datePublished\":\"2013-03-20T15:42:50+00:00\",\"dateModified\":\"2025-03-11T20:18:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/\"},\"wordCount\":667,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/app\\\/uploads\\\/2013\\\/03\\\/blog_superblade_nizsi_header.png\",\"keywords\":[\"racky\",\"servery\"],\"articleSection\":[\"Technologie\"],\"inLanguage\":\"cs\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/\",\"url\":\"https:\\\/\\\/www.websupport.cz\\\/blog\\\/2013\\\/03\\\/prohlednete-si-nas-nejnovejsi-rack\\\/\",\"name\":\"Prohl\u00e9dn\u011bte si n\u00e1\u0161 nejnov\u011bj\u0161\u00ed rack - 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