{"id":73789,"date":"2020-03-12T08:42:49","date_gmt":"2020-03-12T05:42:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele"},"modified":"2020-03-12T08:42:49","modified_gmt":"2020-03-12T05:42:49","slug":"memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","title":{"rendered":"Memcached 1.6.0 \u2014 system pami\u0119ci podr\u0119cznej danych w RAM z mo\u017cliwo\u015bci\u0105 zapisywania na no\u015bniku zewn\u0119trznym","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"


\n \"Memcached<\/p>\n

<\/a><\/p>\n

8 marca zaktualizowano system pami\u0119ci podr\u0119cznej danych w pami\u0119ci operacyjnej Memcached<\/strong> do wersji 1.6.0<\/strong>. G\u0142\u00f3wna r\u00f3\u017cnica w stosunku do poprzednich wyda\u0144 polega na tym, \u017ce teraz dla przechowywania pami\u0119ci podr\u0119cznej mo\u017cliwe jest u\u017cycie zewn\u0119trznego urz\u0105dzenia.<\/p>\n

Memcached<\/strong> jest u\u017cywana do przyspieszania dzia\u0142ania wysoko obci\u0105\u017conych stron internetowych lub aplikacji internetowych poprzez cachowanie dost\u0119pu do baz danych i danych po\u015brednich.<\/p>\n

W nowej wersji w domy\u015blnej kompilacji w\u0142\u0105czony jest parametr extstore<\/strong>, kt\u00f3ry odpowiada za wykorzystanie zewn\u0119trznego no\u015bnika. Aby wy\u0142\u0105czy\u0107 t\u0119 funkcj\u0119, nale\u017cy w pliku .\/configure okre\u015bli\u0107 parametr \u2014disable-extstore. Jednak mimo, \u017ce domy\u015blnie jest ona w\u0142\u0105czona, przy uruchomieniu nale\u017cy wyra\u017anie wskaza\u0107, \u017ce ta funkcja ma by\u0107 u\u017cywana.<\/p>\n

Extstore<\/strong> pozwala na u\u017cycie zewn\u0119trznych Flash<\/strong> lub SSD<\/strong> no\u015bnik\u00f3w, aby zwi\u0119kszy\u0107 rozmiar pami\u0119ci podr\u0119cznej. Pozwoli to na cachowanie znacznie wi\u0119kszych ilo\u015bci danych ni\u017c bez korzystania z tej funkcji.<\/p>\n

Kolejnym wa\u017cnym nowym elementem by\u0142a przer\u00f3bka interakcji sieciowej, kt\u00f3ra zosta\u0142a dostosowana do automatycznego przetwarzania pakietowych \u017c\u0105da\u0144 w ramach jednego wywo\u0142ania systemowego. W poprzednich wersjach przetwarzanie ka\u017cdego zapytania GET by\u0142o realizowane w osobnym pakiecie, podczas gdy w nowej wersji odpowiedzi na kilka zapyta\u0144 s\u0105 zbierane w jeden metapakiet i przesy\u0142ane r\u00f3wnocze\u015bnie. W rezultacie tego nowego rozwi\u0105zania obci\u0105\u017cenie CPU zmniejszy\u0142o si\u0119 o 25%.<\/p>\n

W wyniku tej modernizacji zmniejszy\u0142o si\u0119 r\u00f3wnie\u017c zu\u017cycie pami\u0119ci na buforowanie \u2014 z 4,5 Kb do 400-500 bajt\u00f3w na wywo\u0142anie, a tak\u017ce zmniejszy\u0142o si\u0119 u\u017cycie funkcji malloc, realloc i free, co doprowadzi\u0142o do mniejszej fragmentacji pami\u0119ci. Ka\u017cdy w\u0105tek teraz obs\u0142uguje sw\u00f3j pul bufor\u00f3w do odczytu i zapisu dla aktywnych po\u0142\u0105cze\u0144. W celu dostosowania rozmiar\u00f3w tych bufor\u00f3w dost\u0119pne s\u0105 opcje -o resp_obj_mem_limit=N i -o read_buf_mem_limit=N.<\/p>\n

Og\u0142oszono r\u00f3wnie\u017c wprowadzenie protoko\u0142u wymiany z serwerem w kategorii \u201eprzestarza\u0142ych\u201d. Zast\u0105pi\u0142 go protok\u00f3\u0142 meta \u2014 tekstowa wersja protoko\u0142u z kompaktowymi meta-komendami. W nowym protokole uwzgl\u0119dnione zosta\u0142y wszystkie operacje dost\u0119pne wcze\u015bniej w starych wersjach protoko\u0142u binarnego.<\/p>\n

<\/p>\n

>>> Oficjalna strona<\/a><\/p>\n

<\/noindex><\/noindex>
\n<\/p>\n

>>> Kod \u017ar\u00f3d\u0142owy<\/a> (licencja BSD)<\/p>\n

<\/noindex>
\n<\/p>\n

>>> Opis Extstore<\/a><\/p>\n

<\/noindex>
\n<\/p>\n

>>> Opis komend meta<\/a><\/p>\n

<\/noindex><\/p>\n

\u0179r\u00f3d\u0142o: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":73790,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-73789","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Memcached 1.6.0 \u2014 systema cachowania danych w RAM z mo\u017cliwo\u015bci\u0105 zapisu na zewn\u0119trznym no\u015bniku | 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