{"id":2332,"date":"2012-07-19T09:35:49","date_gmt":"2012-07-19T07:35:49","guid":{"rendered":"http:\/\/blog.websupport.cz\/?p=2332"},"modified":"2025-03-11T21:18:16","modified_gmt":"2025-03-11T20:18:16","slug":"naspeedujte-svuj-web","status":"publish","type":"post","link":"https:\/\/www.websupport.cz\/blog\/2012\/07\/naspeedujte-svuj-web\/","title":{"rendered":"Naspeedujte sv\u016fj web"},"content":{"rendered":"
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Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00ed v\u0161echny velk\u00e9 weby jako Facebook \u010di Twitter. D\u00edky nim se p\u0159i opakovan\u00e9m prohl\u00ed\u017een\u00ed zobrazuj\u00ed rychleji. K nejpopul\u00e1rn\u011bj\u0161\u00edm technologi\u00edm na akceleraci pat\u0159\u00ed Memcache a Varnish. Od nov\u00e9ho roku jich m\u00e1te k dispozici iu n\u00e1s.<\/p>\n

Pou\u017eit\u00ed akcelera\u010dn\u00edch technik ovliv\u0148uje pozitivn\u011b nejen na provoz webu, ale i na stabilitu hostingu. Request vybaven\u00fd na p\u0159\u00edmo na stran\u011b klienta bude vybaven rychleji, ne\u017e request, kter\u00fd vy\u0159\u00edd\u00ed n\u011bjak\u00fd vzd\u00e1len\u00fd server. Cachov\u00e1n\u00ed web str\u00e1nka je b\u00fdv\u00e1 odoln\u011bj\u0161\u00ed v\u016f\u010di p\u0159\u00edpadn\u00fdm probl\u00e9m\u016fm s v\u00fdkonem web-serveru nebo datab\u00e1zov\u00e9ho serveru.<\/p>\n

 <\/p>\n<\/div>\n<\/div>\n

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Memcache<\/h3>\n

Memcache<\/a> je distribuov\u00e1na pam\u011b\u0165ov\u00e1 cache resp. key = value datab\u00e1ze. Do t\u00e9to datab\u00e1ze se vlo\u017e\u00ed pod ur\u010dit\u00fdm kl\u00ed\u010dem hodnota a n\u00e1sledn\u011b se pomoc\u00ed tohoto kl\u00ed\u010de dan\u00e1 hodnota znovu vyt\u00e1hne. Je to velmi rychl\u00e9 a velmi jednoduch\u00e9. Memcache se nej\u010dast\u011bji pou\u017e\u00edv\u00e1 k ukl\u00e1d\u00e1n\u00ed v\u00fdsledk\u016f z datab\u00e1ze, tak\u017ee se l\u00e9pe hod\u00ed pro dynamicky generovan\u00e9 webov\u00e9 str\u00e1nky, jako jsou r\u016fzn\u00e9 CMS nebo e-shopy<\/strong>. Je v\u0161ak mo\u017en\u00e9 do n\u00ed ukl\u00e1dat jak\u00e1koliv data do velikosti 1 MB \/ kl\u00ed\u010d. Podpora Memcache se nach\u00e1z\u00ed v ka\u017ed\u00e9 webov\u00e9 aplikaci, kter\u00e1 to mysl\u00ed s produk\u010dn\u00edm nasazen\u00edm alespo\u0148 tro\u0161ku v\u00e1\u017en\u011b.<\/p>\n

Na na\u0161em hostingu<\/strong> se nach\u00e1z\u00ed Memcache na adrese localhost: 11211<\/strong>. Program\u00e1tor\u016fm webov\u00fdch aplikac\u00ed se m\u016f\u017ee hodit materi\u00e1l pro programov\u00e1n\u00ed pomoc\u00ed Memcache. Pokud v\u00edte, \u017ee danou hodnotu, kterou m\u00e1te v datab\u00e1zi, budete pou\u017e\u00edvat \u010dast\u011bji a \u017ee se nem\u011bn\u00ed, rovnou ji m\u016f\u017eete d\u00e1t do Memcache.<\/p>\n

Od minul\u00e9ho roku m\u00e1me takov\u00e9 upraven\u00e9 nasazen\u00ed pou\u017eity pro PHP sessions, kter\u00e9 jsme m\u011bli sp\u00ed\u0161e na datab\u00e1zov\u00e9m serveru. Lagov\u00e1n\u00ed na db serveru zp\u016fsobovalo lagov\u00e1n\u00ed na cel\u00e9m hostingu. Probl\u00e9m jsme vy\u0159e\u0161ili pou\u017eit\u00edm Memcache server\u016f, do kter\u00fdch vkl\u00e1d\u00e1me PHP sessions. Od nasazen\u00ed jsme u\u017e takov\u00fd probl\u00e9m nezaznamenali.<\/p>\n

 <\/p>\n

Varnish<\/h3>\n

Varnish<\/a> je velmi rychl\u00e1 reverzn\u00ed proxy ur\u010den\u00e1 zejm\u00e9na na cachov\u00e1n\u00ed statick\u00e9ho obsahu, bu\u010f p\u0159\u00edmo do RAM nebo lok\u00e1ln\u011b na disk. Reverzn\u00ed proxy se stav\u00ed p\u0159ed jeden nebo v\u00edce webov\u00fdch server\u016f, na kter\u00e9 m\u016f\u017ee – ale nemus\u00ed – rozd\u011blovat z\u00e1t\u011b\u017e. Na tyto servery p\u0159epos\u00edl\u00e1 po\u017eadavky a pokud ji\u017e dan\u00fd obsah m\u00e1 u sebe, vy\u0159\u00edd\u00ed po\u017eadavek m\u00edsto web-serveru. T\u00edm sn\u00ed\u017e\u00ed n\u00e1roky na web server, kter\u00fd se m\u016f\u017ee v\u011bnovat jin\u00fdm po\u017eadavk\u016fm. Varnish je tedy skv\u011bl\u00fd na cachov\u00e1n\u00ed obr\u00e1zk\u016f, HTML, javascriptem, CSS<\/strong> – zkr\u00e1tka statick\u00e9ho obsahu.<\/p>\n

V na\u0161em p\u0159\u00edpad\u011b bylo t\u0159eba propojit Varnish s CDB datab\u00e1z\u00ed. Nebylo to \u00fapln\u011b p\u0159\u00edmo\u010dar\u00e9, proto\u017ee Varnish ve sv\u00e9m vlastn\u00edm jazyce CDB datab\u00e1zi nepodporuje. Na\u0161t\u011bst\u00ed podporuje jazyk C, tak\u017ee bylo mo\u017en\u00e9 podporu pro CDB datab\u00e1zi doprogramovat. Nutnost\u00ed byla mo\u017enost zapnout nebo vypnout ho podle pot\u0159eby. To se \u0159e\u0161\u00ed na \u00farovni DNS syst\u00e9mu. Pro spu\u0161t\u011bn\u00ed Varnish sta\u010d\u00ed zm\u011bnit adresu str\u00e1nky na IP 195.210.29.47<\/strong>. Pokud si jen chcete vyzkou\u0161et, jak bude str\u00e1nka fungovat p\u0159es Varnish, nemus\u00edte nic m\u011bnit, sta\u010d\u00ed si nastavit sv\u016fj hosts<\/a> soubor na IP adresu 195.210.29.47 pro dom\u00e9nu, na kter\u00e9 to chcete otestovat.<\/p>\n

<\/h3>\n

PHP\u00a0akcelerace<\/h3>\n

T\u0159et\u00ed technologi\u00ed, kterou na na\u0161ich serverech vyu\u017e\u00edv\u00e1me u\u017e d\u00e1vno, je PHP akcelerace. My pou\u017e\u00edv\u00e1me \u00a0eAccelerator<\/a>.\u00a0Tento PHP akceler\u00e1tor p\u0159elo\u017e\u00ed poprv\u00e9 zdrojov\u00fd k\u00f3d PHP aplikace do bytekodu a d\u00e1le pou\u017e\u00edv\u00e1 ji\u017e p\u0159\u00edmo ten. Zp\u016fsob\u00ed t\u00edm rychlej\u0161\u00ed zpracov\u00e1n\u00ed, proto\u017ee pak ji\u017e nen\u00ed t\u0159eba neust\u00e1le pars PHP skripty do bytekodu znovu a znovu p\u0159i ka\u017ed\u00e9m requestu.<\/p>\n

PHP akcelerace je na PHP 4 je zapnut\u00e1 defaultn\u011b. V p\u0159\u00edpad\u011b PHP 5 a PHP 5.3 ji t\u0159eba nejd\u0159\u00edve zapnout a p\u0159ed nasazen\u00edm do ostr\u00e9ho provozu web po\u0159\u00e1dn\u011b otestovat.<\/p>\n

 <\/p>\n

Akcelerace na va\u0161em hostingu<\/h3>\n

Nasazen\u00ed Memcache-u a Varnish-u na na\u0161ich serverech nebylo v\u016fbec jednoduch\u00e9. Museli jsme je upravit pro pot\u0159eby sd\u00edlen\u00e9ho hostingu, na kter\u00e9m existuje vedle sebe tis\u00edce u\u017eivatel\u016f s r\u016fzn\u00fdmi aplikacemi. V\u0161echny akceler\u00e1tory se zap\u00ednaj\u00ed p\u0159es WebAdmin. Vyberete dom\u00e9nu, kterou chcete spravovat, v lev\u00e9m menu kliknete na tla\u010d\u00edtko Web a n\u00e1sledn\u011b na z\u00e1lo\u017eku HTTP akcelerace. Zat\u00edm jde jen o BETA verzi, proto\u017ee jsme to zat\u00edm testovali pouze intern\u011b. Budeme r\u00e1di pokud n\u00e1m d\u00e1te feedback, jak se v\u00e1m s akceler\u00e1tory pracuje.<\/p>\n

Pozor!<\/strong> Po aktivov\u00e1n\u00ed Varnish-u dojde ke zm\u011bn\u011b p\u0159estane fungovat FTP<\/strong>, proto\u017ee se za\u010dne pou\u017e\u00edvat jin\u00e1 IP adresa ne\u017e je uvedena v A-z\u00e1znamu. Po aktivov\u00e1n\u00ed je proto nezbytn\u00e9 pou\u017e\u00edt n\u011bjak\u00fd alternat\u00edvn\u00ed zp\u016fsob p\u0159ipojov\u00e1n\u00ed na FTP<\/a>.<\/strong><\/p>\n

Podrobnou verzi tohoto \u010dl\u00e1nku<\/a><\/em> a v\u0161echny pot\u0159ebn\u00e9 postupy najdete na na\u0161\u00ed wiki.<\/em><\/p>\n

P\u0159ipravujeme tak\u00e9 \u010dl\u00e1nek o tom, jak zprovoznit Memcache na popul\u00e1rn\u00edch CMS a e-shopech.<\/em><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00ed v\u0161echny velk\u00e9 weby jako Facebook \u010di Twitter. D\u00edky nim se p\u0159i opakovan\u00e9m prohl\u00ed\u017een\u00ed zobrazuj\u00ed rychleji. K nejpopul\u00e1rn\u011bj\u0161\u00edm technologi\u00edm na akceleraci pat\u0159\u00ed Memcache a Varnish. Od nov\u00e9ho roku jich m\u00e1te k dispozici iu n\u00e1s.<\/p>\n","protected":false},"author":2,"featured_media":2335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,52],"tags":[],"class_list":["post-2332","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","category-tipy-a-triky"],"yoast_head":"\nNaspeedujte sv\u016fj web - 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\/2012\/07\/naspeedujte-svuj-web\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Naspeedujte sv\u016fj web - Websupport.cz Blog\" \/>\n<meta property=\"og:description\" content=\"Webov\u00e9 akceler\u00e1tory vyu\u017e\u00edvaj\u00ed v\u0161echny velk\u00e9 weby jako Facebook \u010di Twitter. 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