{"id":873,"date":"2010-10-04T12:58:25","date_gmt":"2010-10-04T10:58:25","guid":{"rendered":"http:\/\/blog.websupport.sk\/?p=873"},"modified":"2025-03-11T21:06:07","modified_gmt":"2025-03-11T20:06:07","slug":"efektivna-virtualizacia-i","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2010\/10\/efektivna-virtualizacia-i\/","title":{"rendered":"Efekt\u00edvna virtualiz\u00e1cia I."},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\"><b>Doba \u010d\u00edtania:<\/b><\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span><p><a href=\"https:\/\/www.websupport.sk\/blog\/\/\/2010\/10\/efektivna-virtualizacia-i\"><img loading=\"lazy\" decoding=\"async\" title=\"virtualiz\" src=\"https:\/\/www.websupport.sk\/blogoads\/sites\/2\/2010\/09\/virtualiz.jpg\" alt=\"\" width=\"517\" height=\"112\" \/><\/a><\/p>\n<p>Opera\u010dn\u00e1 pam\u00e4\u0165 je d\u00f4le\u017eit\u00fd parameter virtu\u00e1lneho servera. \u0160tandardne sa objedn\u00e1va konkr\u00e9tna ve\u013ekos\u0165 pod\u013ea po\u017eiadaviek z\u00e1kazn\u00edka. Nie ka\u017ed\u00fd vopred vie, ko\u013eko jej bude potrebova\u0165. Pri objednan\u00ed zjavne dostato\u010dn\u00e9ho mno\u017estva m\u00f4\u017eu pri n\u00e1razov\u00fdch udalostiach nasta\u0165 prv\u00e9 probl\u00e9my ako spomalenie, v hor\u0161om pr\u00edpadne nefunk\u010dnos\u0165 webu. Pri objednan\u00ed v\u00e4\u010d\u0161ej pam\u00e4te je na mieste ot\u00e1zka, pre\u010do to\u013eko plati\u0165 za nie\u010do, \u010do v\u00e4\u010d\u0161inu \u010dasu nepou\u017e\u00edvame. Uk\u00e1\u017eme si, ak\u00e9 m\u00e1me in\u00e9 mo\u017enosti a pon\u00faknime rie\u0161enie.<\/p>\n<p><!--more--><\/p>\n<p>Jednoduch\u00e1 situ\u00e1cia. M\u00e1te web hostovan\u00fd na vlastnom virtu\u00e1le a objednali ste si 256 MB RAM, \u010do v\u00e1m na \u0161tandardn\u00fa prev\u00e1dzku sta\u010d\u00ed a je to lacn\u00e9. Raz za \u010das sa nie\u010do deje a n\u00e1v\u0161tevn\u00edci bombarduj\u00fa, s\u0165ahuj\u00fa, refreshuj\u00fa, pozeraj\u00fa vide\u00e1, kupuj\u00fa posledn\u00e9 l\u00edstky, h\u013eadaj\u00fa super lacn\u00fd parf\u00e9m v e-shope&#8230;\u00a0 Alebo pastnete na web aktu\u00e1lny \u010dl\u00e1nok a chce si ho pre\u010d\u00edta\u0165 cel\u00e1 republika. Lacn\u00fdch 256 MB RAM je zrazu zahlten\u00fdch po\u017eiadavkami surferov. Opera\u010dn\u00e9mu syst\u00e9mu neost\u00e1va ni\u010d in\u00e9, ako swapova\u0165 na disk. Hor\u0161ie je to s \u013eu\u010fmi, ktor\u00ed ber\u00fa V\u00e1\u0161 web ako samozrejmos\u0165. Za\u010dn\u00fa by\u0165 nerv\u00f3zni, na\u010d\u00edtavanie je pomal\u00e9 alebo \u017eiadne, datab\u00e1za pad\u00e1 a najhor\u0161ie, v\u0161etci to pozn\u00e1me, brzd\u00ed to biznis a nerob\u00ed pr\u00e1ve dobr\u00e9 meno.<\/p>\n<p>Poviete si, \u017ee toto sa u\u017e nesmie opakova\u0165. Admin ozn\u00e1mi, \u017ee ak by sme vtedy mali 1400 MB RAM, v\u0161etko by fungovalo bez probl\u00e9mov. \u013dahk\u00e1 matematika. 1400 \u2013 256 = treba doobjedna\u0165 k virtu\u00e1lu nie\u010do cez giga RAM. Cel\u00fd v\u00fdpadok trv\u00e1 2 hodiny a stane sa dvakr\u00e1t do mesiaca. V ostatnom \u010dase 256 MB bohate sta\u010d\u00ed. Pre p\u00e1r extr\u00e9mov plati\u0165 zbyto\u010dne ve\u013ek\u00fa RAM, ke\u010f ju v\u00e4\u010d\u0161inu \u010dasu nevyu\u017eijete? Alebo objedn\u00e1va\u0165 RAM navy\u0161e len na jeden de\u0148? Na ktor\u00fd? Ve\u0161tica nepom\u00f4\u017ee.<\/p>\n<p>T\u00fdmto komplik\u00e1ci\u00e1m rozumieme. Radi by sme V\u00e1s odbremenili od rozhodovania sa, ak\u00e1 konfigur\u00e1cia pam\u00e4te je t\u00e1 spr\u00e1vna. Pripravili sme nov\u00fd virtu\u00e1lny server, ktor\u00fd sa prisp\u00f4sobuje potreb\u00e1m aplik\u00e1ci\u00ed. \u0160tandardne bude ma\u0165 k dispoz\u00edci\u00ed 256  RAM a v pr\u00edpade, \u017ee zaznamen\u00e1me zv\u00fd\u0161en\u00fa potrebu RAM, tak v\u00e1m dynamicky a za behu prid\u00e1me presne to\u013eko, ko\u013eko potrebujete. Samozrejme bez re\u0161tartovania a ak\u00e9hoko\u013evek zastavenia virtu\u00e1lneho servera. Okam\u017eite, ako prestanete pridelen\u00fa RAM pou\u017e\u00edva\u0165, odoberieme ju a budeme \u010daka\u0165 \u010falej, \u010di ju niekto in\u00fd nebude potrebova\u0165. V\u0161etko automaticky a inteligentne riaden\u00e9, bez z\u00e1sahu administr\u00e1tora. Jednoducho tak m\u00f4\u017eete zabr\u00e1ni\u0165 nedostupnosti webu v pr\u00edpade, \u017ee ho surferi ne\u010dakane vy\u0165a\u017eili, alebo sa poist\u00edte pred nepl\u00e1novan\u00fdmi udalos\u0165ami.<\/p>\n<p>Nov\u00fd virtu\u00e1lny server sme pracovne nazvali Unlimited Virtual Server \u2013 pou\u017e\u00edvajte to, \u010do pr\u00e1ve potrebujete, za jednotn\u00fa cenu. V najbli\u017e\u0161\u00edch d\u0148och poskytneme nieko\u013eko tak\u00fdchto virtu\u00e1lov na testovanie zadarmo. Budete si m\u00f4c\u0165 za\u0165a\u017ei\u0165 stroj s 256 MB RAM \u010d\u00edmko\u013evek, \u010do zaberie ove\u013ea viac MB. Potom m\u00f4\u017eete sledova\u0165 ako sa postupne zv\u00e4\u010d\u0161uje opera\u010dn\u00e1 pam\u00e4\u0165.<\/p>\n<p>Ako to funguje? Odkia\u013e t\u00fa \u201eramku navy\u0161e\u201c zoberieme? Z anal\u00fdzy dlhodobej prev\u00e1dzky sme zistili, \u017ee na fyzickom stroji, kde be\u017e\u00ed viac virtu\u00e1lov, je nevyu\u017eitej RAM dostatok. Z\u00e1rove\u0148 existuje mno\u017estvo strojov, ktor\u00fdm by sa z \u010dasu na \u010das viac RAM ve\u013emi hodilo. Prisp\u00f4soben\u00edm virtualiza\u010dnej technol\u00f3gie pre tak\u00e9to \u00fa\u010dely, inteligentn\u00fdm a spravodliv\u00fdm prerozde\u013eovan\u00edm pam\u00e4te, m\u00f4\u017eeme obmedzi\u0165 riziko nedostupnosti kv\u00f4li jej nedostatku.<\/p>\n<p>Obdobn\u00e9 n\u00e1pady s\u00fa dnes realizovan\u00e9 viacmenej na akademickej p\u00f4de. Hlavn\u00e9 d\u00f4vody praktickej realiz\u00e1cie s\u00fa jednoduch\u0161ia a spo\u013eahlivej\u0161ia prev\u00e1dzka webu a maxim\u00e1lne \u00fasporn\u00e9 vyu\u017eitie prostriedkov. V \u010fal\u0161ej f\u00e1ze sa budeme venova\u0165 dynamick\u00e9mu pride\u013eovaniu v\u00fdpo\u010dtov\u00e9ho \u010dasu.<\/p>\n<p><em>Matej Petr\u00edk<br \/>\nMatej Sokol<\/em><\/p>\n<hr \/>\n<p><strong>Tento projekt vznikol po tom, ako n\u00e1s oslovili dvaja \u0161tudenti informatiky so svojim zauj\u00edmav\u00fdm n\u00e1padom, ktor\u00fd sa rozhodli technologicky privies\u0165 do \u017eivota. WebSupport iniciat\u00edvu \u0161ikovn\u00fdch \u013eud\u00ed v\u017edy nad\u0161ene oce\u0148uje\u00a0 a v\u00edta, tak\u017ee sme nadviazali spolupr\u00e1cu.<br \/>\n<\/strong><\/p>\n<p><strong>Po poskytnut\u00ed \u00favodnej konzult\u00e1cie sme zastre\u0161ovali a zastre\u0161ujeme projekt materi\u00e1lne aj odborne. Chalani boli u n\u00e1s usmer\u0148ovan\u00ed s\u00e9riou konzult\u00e1ci\u00ed. A tak V\u00e1m v spolupr\u00e1ci s Matejom Petr\u00edkom a Matejom Sokolom m\u00f4\u017eeme prinies\u0165 t\u00fato slu\u017ebu na odsk\u00fa\u0161anie.<\/strong><\/p>\n<p><strong>Projekt sa vol\u00e1 Rambler a sp\u00fa\u0161\u0165ame jeho testovanie u z\u00e1kazn\u00edkov, ktor\u00ed o neho prejavia z\u00e1ujem. Pre zapojenie sa do testingu, sta\u010d\u00ed posla\u0165 mail na rambler@websupport.sk<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Opera\u010dn\u00e1 pam\u00e4\u0165 je d\u00f4le\u017eit\u00fd parameter virtu\u00e1lneho servera. \u0160tandardne sa objedn\u00e1va konkr\u00e9tna ve\u013ekos\u0165 pod\u013ea po\u017eiadaviek z\u00e1kazn\u00edka. Nie ka\u017ed\u00fd vopred vie, ko\u013eko jej bude potrebova\u0165. Pri objednan\u00ed zjavne dostato\u010dn\u00e9ho mno\u017estva m\u00f4\u017eu pri n\u00e1razov\u00fdch udalostiach nasta\u0165 prv\u00e9 probl\u00e9my ako spomalenie, v hor\u0161om pr\u00edpadne nefunk\u010dnos\u0165 webu. Pri objednan\u00ed v\u00e4\u010d\u0161ej pam\u00e4te je na mieste ot\u00e1zka, pre\u010do to\u013eko plati\u0165 za nie\u010do, [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":5589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,8],"tags":[25,237,451,462,704,916,974],"class_list":["post-873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","category-tipy-a-triky","tag-adaptivna-ram","tag-dynamicka-ram","tag-labs","tag-loadbalancing","tag-rambler","tag-virtualizacia","tag-xen"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Efekt\u00edvna virtualiz\u00e1cia I. - Websupport 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.sk\/blog\/2010\/10\/efektivna-virtualizacia-i\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Efekt\u00edvna virtualiz\u00e1cia I. - Websupport blog\" \/>\n<meta property=\"og:description\" content=\"Opera\u010dn\u00e1 pam\u00e4\u0165 je d\u00f4le\u017eit\u00fd parameter virtu\u00e1lneho servera. \u0160tandardne sa objedn\u00e1va konkr\u00e9tna ve\u013ekos\u0165 pod\u013ea po\u017eiadaviek z\u00e1kazn\u00edka. Nie ka\u017ed\u00fd vopred vie, ko\u013eko jej bude potrebova\u0165. Pri objednan\u00ed zjavne dostato\u010dn\u00e9ho mno\u017estva m\u00f4\u017eu pri n\u00e1razov\u00fdch udalostiach nasta\u0165 prv\u00e9 probl\u00e9my ako spomalenie, v hor\u0161om pr\u00edpadne nefunk\u010dnos\u0165 webu. Pri objednan\u00ed v\u00e4\u010d\u0161ej pam\u00e4te je na mieste ot\u00e1zka, pre\u010do to\u013eko plati\u0165 za nie\u010do, [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.websupport.sk\/blog\/2010\/10\/efektivna-virtualizacia-i\/\" \/>\n<meta property=\"og:site_name\" content=\"Websupport blog\" \/>\n<meta property=\"article:published_time\" content=\"2010-10-04T10:58:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-03-11T20:06:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2015\/01\/tmavomodra_4.png\" \/>\n\t<meta property=\"og:image:width\" content=\"290\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Michal Truban\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Autor\" \/>\n\t<meta name=\"twitter:data1\" content=\"Michal Truban\" \/>\n\t<meta name=\"twitter:label2\" content=\"Predpokladan\u00fd \u010das \u010d\u00edtania\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 min\u00faty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/\"},\"author\":{\"name\":\"Michal Truban\",\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/#\\\/schema\\\/person\\\/98e0b3d0faed9284e8b92063e20b85d5\"},\"headline\":\"Efekt\u00edvna virtualiz\u00e1cia I.\",\"datePublished\":\"2010-10-04T10:58:25+00:00\",\"dateModified\":\"2025-03-11T20:06:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/\"},\"wordCount\":816,\"commentCount\":17,\"publisher\":{\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/app\\\/uploads\\\/sites\\\/2\\\/2015\\\/01\\\/tmavomodra_4.png\",\"keywords\":[\"adapt\u00edvna RAM\",\"dynamick\u00e1 RAM\",\"labs\",\"loadbalancing\",\"rambler\",\"virtualizacia\",\"XEN\"],\"articleSection\":[\"Technol\u00f3gie\",\"Tipy a triky\"],\"inLanguage\":\"sk-SK\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/\",\"url\":\"https:\\\/\\\/www.websupport.sk\\\/blog\\\/2010\\\/10\\\/efektivna-virtualizacia-i\\\/\",\"name\":\"Efekt\u00edvna virtualiz\u00e1cia I. - 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N\u00e1\u0161 NBA (No Business Administration) je skvel\u00fdm pr\u00edkladom toho, \u017ee poctiv\u00e9 podnikanie sa d\u00e1 robi\u0165 aj v tenisk\u00e1ch a bez zbyto\u010dn\u00fdch formal\u00edt. Podnikanie je pre neho sp\u00f4sob, ako zlep\u0161ova\u0165 svet okolo seba. Podporuje startupov\u00fa komunitu. 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