{"id":2406,"date":"2012-01-11T14:53:51","date_gmt":"2012-01-11T13:53:51","guid":{"rendered":"http:\/\/blog.websupport.sk\/?p=2406"},"modified":"2025-03-11T21:06:13","modified_gmt":"2025-03-11T20:06:13","slug":"naspeedujte-svoj-web","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2012\/01\/naspeedujte-svoj-web\/","title":{"rendered":"Naspeedujte svoj web"},"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>Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00fa v\u0161etky ve\u013ek\u00e9 weby ako Facebook \u010di Twitter. V\u010faka nim sa pri opakovanom prehliadan\u00ed zobrazuj\u00fa r\u00fdchlej\u0161ie. K najpopul\u00e1rnej\u0161\u00edm technol\u00f3gi\u00e1m na akceler\u00e1ciu patria Memcache a Varnish. Od nov\u00e9ho roku ich m\u00e1te k dispoz\u00edcii aj u n\u00e1s.<\/p>\n<p><!--more--><\/p>\n<p>Pou\u017eitie akcelera\u010dn\u00fdch techn\u00edk vpl\u00fdva pozit\u00edvne nielen na prev\u00e1dzku webu, ale aj na stabilitu hostingu.\u00a0Request vybaven\u00fd na priamo na strane klienta bude vybaven\u00fd r\u00fdchlej\u0161ie, ako request, ktor\u00fd vybav\u00ed nejak\u00fd vzdialen\u00fd server. \u00a0 Cachovan\u00e1 web str\u00e1nka je b\u00fdva odolnej\u0161ia vo\u010di pr\u00edpadn\u00fdm probl\u00e9mom s v\u00fdkonom web-serveru alebo datab\u00e1zov\u00e9ho serveru.<\/p>\n<h4>Memcache<\/h4>\n<p><a href=\"http:\/\/en.wikipedia.org\/wiki\/Memcached\" target=\"_blank\">Memcache<\/a> je distribuovan\u00e1 pam\u00e4\u0165ov\u00e1 cache resp. key = value datab\u00e1za. Do tejto datab\u00e1zy sa vlo\u017e\u00ed pod ur\u010dit\u00fdm k\u013e\u00fa\u010dom hodnota a n\u00e1sledne sa pomocou tohto k\u013e\u00fa\u010da dan\u00e1 hodnota znova vytiahne. Je to ve\u013emi r\u00fdchle a ve\u013emi jednoduch\u00e9. Memcache sa naj\u010dastej\u0161ie pou\u017e\u00edva na ukladanie v\u00fdsledkov z datab\u00e1zy, tak\u017ee sa lep\u0161ie hod\u00ed pre <strong>dynamicky generovan\u00e9 web str\u00e1nky, ako s\u00fa r\u00f4zne CMS alebo e-shopy<\/strong>. Je v\u0161ak mo\u017en\u00e9 do nej uklada\u0165 ak\u00e9ko\u013evek d\u00e1ta do ve\u013ekosti 1 MB\/k\u013e\u00fa\u010d. Podpora Memcache sa nach\u00e1dza v ka\u017edej webovej aplik\u00e1cii, ktor\u00e1 to mysl\u00ed s produk\u010dn\u00fdm nasaden\u00edm aspo\u0148 tro\u0161ku v\u00e1\u017ene.<\/p>\n<p><strong>Na na\u0161om hostingu<\/strong> sa nach\u00e1dza Memcache na adrese<strong> localhost:11211<\/strong>. Program\u00e1torom webov\u00fdch aplik\u00e1ci\u00ed sa m\u00f4\u017ee hodi\u0165 materi\u00e1l pre programovanie pomocou Memcache. Ak viete, \u017ee dan\u00fa hodnotu, ktor\u00fa mate v datab\u00e1ze, budete pou\u017e\u00edva\u0165 \u010dastej\u0161ie a \u017ee sa nemen\u00ed, rovno ju m\u00f4\u017eete da\u0165 do Memcache.<\/p>\n<p>Od minul\u00e9ho roka m\u00e1me tak\u00e9to upraven\u00e9 nasadenie pou\u017eit\u00e9 pre PHP sessions, ktor\u00e9 sme mali sk\u00f4r na datab\u00e1zovom serveri. Lagovanie na db serveri sp\u00f4sobovalo lagovanie na celom hostingu. Probl\u00e9m sme vyrie\u0161ili pou\u017eit\u00edm Memcache serverov, do ktor\u00fdch vklad\u00e1me PHP sessions. Od nasadenia sme u\u017e tak\u00fdto probl\u00e9m nezaznamenali.<\/p>\n<h4>Varnish<\/h4>\n<p><a href=\"http:\/\/en.wikipedia.org\/wiki\/Varnish_(software)\" target=\"_blank\">Varnish<\/a> je ve\u013emi r\u00fdchla reverzn\u00e1 proxy ur\u010den\u00e1 najm\u00e4 na cachovanie statick\u00e9ho obsahu, bu\u010f priamo do RAM alebo lok\u00e1lne na disk. Reverzn\u00e1 proxy sa stavia pred jeden alebo viac webov\u00fdch serverov, na ktor\u00e9 m\u00f4\u017ee &#8211; ale nemus\u00ed &#8211; rozde\u013eova\u0165 z\u00e1\u0165a\u017e. Na tieto servery preposiela po\u017eiadavky a pokia\u013e u\u017e dan\u00fd obsah m\u00e1 u seba, vybav\u00ed po\u017eiadavku miesto web-servera. T\u00fdm zn\u00ed\u017ei n\u00e1roky na web server, ktor\u00fd sa m\u00f4\u017ee venova\u0165 in\u00fdm po\u017eiadavk\u00e1m. Varnish je teda skvel\u00fd na <strong>cachovanie obr\u00e1zkov, HTML, javascriptov, CSS<\/strong> \u2013 skr\u00e1tka statick\u00e9ho obsahu.<\/p>\n<p>V na\u0161om pr\u00edpade bolo treba prepoji\u0165 Varnish s CDB datab\u00e1zou. Nebolo to \u00faplne priamo\u010diare, ke\u010f\u017ee Varnish vo svojom vlastnom jazyku CDB datab\u00e1zu nepodporuje. Na\u0161\u0165astie podporuje jazyk C, tak\u017ee bolo mo\u017en\u00e9 podporu pre CDB datab\u00e1zu doprogramova\u0165. Nutnos\u0165ou bola mo\u017enos\u0165 zapn\u00fa\u0165 alebo vypn\u00fa\u0165 ho pod\u013ea potreby. To sa rie\u0161i na \u00farovni DNS syst\u00e9mu. Pre spustenie Varnishu sta\u010d\u00ed <strong>zmeni\u0165 adresu str\u00e1nky na IP 195.210.29.47<\/strong>. Pokia\u013e si len chcete vysk\u00fa\u0161a\u0165, ako bude str\u00e1nka fungova\u0165 cez Varnish, nemus\u00edte ni\u010d meni\u0165, sta\u010d\u00ed si nastavi\u0165 svoj <em><a href=\"https:\/\/wiki.websupport.sk\/index.php\/Testovanie_webu_na_novom_hostingu#Testovanie webu pomocou \u00fapravy s\u00faboru hosts\" target=\"_blank\">hosts<\/a><\/em>\u00a0s\u00fabor na IP adresu 195.210.29.47 pre dom\u00e9nu, na ktorej to chcete otestova\u0165.<\/p>\n<h4>PHP akceler\u00e1cia<\/h4>\n<p>Tre\u0165ou technol\u00f3giou, ktor\u00fa na na\u0161ich serveroch vyu\u017e\u00edvame u\u017e d\u00e1vnej\u0161ie, je PHP akceler\u00e1cia. My pou\u017e\u00edvame <a title=\"Ofici\u00e1lny web projektu\" href=\"http:\/\/sourceforge.net\/projects\/eaccelerator\/\" target=\"_blank\">eAccelerator<\/a>. Tento PHP akceler\u00e1tor prelo\u017e\u00ed prv\u00fdkr\u00e1t zdrojov\u00fd k\u00f3d PHP aplik\u00e1cie do bytekodu a \u010falej pou\u017e\u00edva u\u017e priamo ten. Sp\u00f4sob\u00ed t\u00fdm r\u00fdchlej\u0161ie spracovanie, preto\u017ee potom u\u017e nie je potrebn\u00e9 neust\u00e1le parsova\u0165 PHP skripty do bytekodu znova a znova pri ka\u017edom requeste.<\/p>\n<p>PHP akceler\u00e1cia je na PHP 4 je zapnut\u00e1 defaultne. V pr\u00edpade PHP 5 a PHP 5.3 ju treba najsk\u00f4r zapn\u00fa\u0165 a pred nasaden\u00edm do ostrej prev\u00e1dzky web poriadne otestova\u0165.<br \/>\nR\u00fdchlej\u0161ie a stabilnej\u0161ie<\/p>\n<h4>Akceler\u00e1cia na va\u0161om hostingu<\/h4>\n<p>Nasadenie Memcache-u a Varnish-u\u00a0na na\u0161ich serveroch nebolo v\u00f4bec jednoduch\u00e9. Museli sme ich upravi\u0165 pre potreby zdie\u013ean\u00e9ho hostingu, na ktorom existuje ved\u013ea seba tis\u00edce u\u017e\u00edvate\u013eov s r\u00f4znymi aplik\u00e1ciami.\u00a0V\u0161etky akceler\u00e1tory sa zap\u00ednaj\u00fa cez WebAdmin. Vyberiete dom\u00e9nu, ktor\u00fa chcete spravova\u0165, v \u013eavom menu kliknete na tla\u010didlo Web a n\u00e1sledne na z\u00e1lo\u017eku HTTP akceler\u00e1cia. Zatia\u013e ide len o BETA verziu, preto\u017ee sme to zatia\u013e testovali len interne. Budeme radi ak n\u00e1m d\u00e1te feedback, ako sa v\u00e1m s akceler\u00e1tormi pracuje.<\/p>\n<p><strong>Pozor!<\/strong> Po aktivovan\u00ed Varnish-u d\u00f4jde k zmene <strong>prestane fungova\u0165 FTP<\/strong>, preto\u017ee sa za\u010dne pou\u017e\u00edva\u0165 in\u00e1 IP adresa ako je uveden\u00e1 v A-z\u00e1zname. Po aktivovan\u00ed je preto potrebn\u00e9 pou\u017ei\u0165 nejak\u00fd <a href=\"https:\/\/wiki.websupport.sk\/index.php\/Akceler%C3%A1cia_webu\">alternat\u00edvny sp\u00f4sob prip\u00e1jania na FTP<\/a><strong>.<\/strong><\/p>\n<p><em><a href=\"https:\/\/wiki.websupport.sk\/index.php\/Akceler%C3%A1cia_webu\">Podrobn\u00fa verziu tohoto \u010dl\u00e1nku<\/a> a v\u0161etky potrebn\u00e9 postupy n\u00e1jdete na na\u0161ej wiki.<br \/>\nPripravujeme tie\u017e \u010dl\u00e1nok o tom, ako spojazdni\u0165 Memcache na popul\u00e1rnych CMS a e-shopoch.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00fa v\u0161etky ve\u013ek\u00e9 weby ako Facebook \u010di Twitter. V\u010faka nim sa pri opakovanom prehliadan\u00ed zobrazuj\u00fa r\u00fdchlej\u0161ie. K najpopul\u00e1rnej\u0161\u00edm technol\u00f3gi\u00e1m na akceler\u00e1ciu patria Memcache a Varnish. Od nov\u00e9ho roku ich m\u00e1te k dispoz\u00edcii aj u n\u00e1s.<\/p>\n","protected":false},"author":90,"featured_media":5574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,8],"tags":[349,498,899],"class_list":["post-2406","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","category-tipy-a-triky","tag-hosting","tag-memcache","tag-varnish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Naspeedujte svoj web - 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\/2012\/01\/naspeedujte-svoj-web\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Naspeedujte svoj web - Websupport blog\" \/>\n<meta property=\"og:description\" content=\"Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00fa v\u0161etky ve\u013ek\u00e9 weby ako Facebook \u010di Twitter. V\u010faka nim sa pri opakovanom prehliadan\u00ed zobrazuj\u00fa r\u00fdchlej\u0161ie. K najpopul\u00e1rnej\u0161\u00edm technol\u00f3gi\u00e1m na akceler\u00e1ciu patria Memcache a Varnish. 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