{"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\/cs\/blog\/news\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","title":{"rendered":"Memcached 1.6.0 \u2014 syst\u00e9m cachov\u00e1n\u00ed dat v RAM s mo\u017enost\u00ed ukl\u00e1d\u00e1n\u00ed na extern\u00ed nosi\u010de","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"


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

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

8. b\u0159ezna prob\u011bhla aktualizace syst\u00e9mu ke\u0161ov\u00e1n\u00ed dat v opera\u010dn\u00ed pam\u011bti Memcached<\/strong> na verzi 1.6.0<\/strong>. Hlavn\u00ed rozd\u00edl od p\u0159edchoz\u00edch verz\u00ed spo\u010d\u00edv\u00e1 v tom, \u017ee nyn\u00ed je mo\u017en\u00e9 pou\u017e\u00edvat extern\u00ed za\u0159\u00edzen\u00ed pro \u00falo\u017ei\u0161t\u011b ke\u0161ovan\u00fdch dat.<\/p>\n

Memcached<\/strong> pou\u017e\u00edv\u00e1 se pro zrychlen\u00ed pr\u00e1ce vysoce zat\u00ed\u017een\u00fdch web\u016f nebo webov\u00fdch aplikac\u00ed prost\u0159ednictv\u00edm ke\u0161ov\u00e1n\u00ed p\u0159\u00edstupu k DBMS a mezidata.<\/p>\n

V nov\u00e9 verzi je p\u0159i kompilaci ve v\u00fdchoz\u00edm nastaven\u00ed zahrnut parametr extstore<\/strong>, kter\u00fd odpov\u00edd\u00e1 za pou\u017e\u00edv\u00e1n\u00ed extern\u00edho \u00falo\u017ei\u0161t\u011b. Pro vypnut\u00ed t\u00e9to funkce je t\u0159eba uv\u00e9st v .\\\/configure parametr \u2014disable-extstore. I kdy\u017e je v\u00fdchoz\u00ed sestaven\u00ed zapnuto, je nutn\u00e9 p\u0159i spu\u0161t\u011bn\u00ed v\u00fdslovn\u011b uv\u00e9st pou\u017eit\u00ed t\u00e9to funkce.<\/p>\n

Extstore<\/strong> umo\u017e\u0148uje pou\u017e\u00edvat extern\u00ed Flash<\/strong> nebo SSD<\/strong> \u00falo\u017ei\u0161t\u011b k zv\u011bt\u0161en\u00ed kapacity ke\u0161e. To umo\u017en\u00ed ke\u0161ovat mnohem v\u011bt\u0161\u00ed objemy dat ne\u017e bez pou\u017eit\u00ed t\u00e9to funkce.<\/p>\n

Dal\u0161\u00edm v\u00fdznamn\u00fdm novinkou byla p\u0159epracov\u00e1n\u00ed s\u00ed\u0165ov\u00e9 interakce, kter\u00e1 je nyn\u00ed p\u0159izp\u016fsobena pro automatick\u00e9 zpracov\u00e1n\u00ed d\u00e1vkov\u00fdch po\u017eadavk\u016f v r\u00e1mci jednoho syst\u00e9mov\u00e9ho vol\u00e1n\u00ed. V p\u0159edchoz\u00edch verz\u00edch byl ka\u017ed\u00fd GET po\u017eadavek zpracov\u00e1n v samostatn\u00e9m bal\u00ed\u010dku, zat\u00edmco v nov\u00e9 verzi jsou odpov\u011bdi na n\u011bkolik po\u017eadavk\u016f shrom\u00e1\u017ed\u011bny do jednoho metabal\u00ed\u010dku a p\u0159ed\u00e1ny najednou. V d\u016fsledku t\u00e9to novinky byla z\u00e1t\u011b\u017e CPU sn\u00ed\u017eena o 25%.<\/p>\n

Tak\u00e9 v d\u016fsledku t\u00e9to modernizace do\u0161lo k v\u00fdrazn\u00e9mu sn\u00ed\u017een\u00ed spot\u0159eby pam\u011bti pro vyrovn\u00e1vac\u00ed pam\u011b\u0165 \u2014 z 4,5 kB na 400-500 byt\u016f na vol\u00e1n\u00ed, a sn\u00ed\u017eilo se pou\u017e\u00edv\u00e1n\u00ed funkc\u00ed malloc, realloc a free, co\u017e vedlo k men\u0161\u00ed fragmentaci pam\u011bti. Ka\u017ed\u00fd vl\u00e1kno nyn\u00ed zpracov\u00e1v\u00e1 sv\u016fj vlastn\u00ed pool vyrovn\u00e1vac\u00edch pam\u011bt\u00ed pro \u010dten\u00ed a z\u00e1pis pro aktivn\u00ed p\u0159ipojen\u00ed. Pro nastaven\u00ed velikosti t\u011bchto vyrovn\u00e1vac\u00edch pam\u011bt\u00ed jsou k dispozici mo\u017enosti -o resp_obj_mem_limit=N a -o read_buf_mem_limt=N.<\/p>\n

Bylo tak\u00e9 ozn\u00e1meno, \u017ee bin\u00e1rn\u00ed protokol pro v\u00fdm\u011bnu se serverem byl za\u0159azen mezi \u201ezastaral\u00e9\u201c. Nahrazuje ho meta protokol \u2014 textov\u00e1 varianta protokolu s kompaktn\u00edmi meta p\u0159\u00edkazy. Nov\u00fd protokol zohled\u0148uje v\u0161echny d\u0159\u00edve dostupn\u00e9 operace, kter\u00e9 vyu\u017e\u00edvaly star\u00e9 verze bin\u00e1rn\u00edho protokolu.<\/p>\n

<\/p>\n

>>> Ofici\u00e1ln\u00ed web<\/a><\/p>\n

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

>>> Zdrojov\u00fd k\u00f3d<\/a> (licence BSD)<\/p>\n

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

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

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

>>> Popis meta-p\u0159\u00edkaz\u016f<\/a><\/p>\n

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

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

8\u0433\u043e \u043c\u0430\u0440\u0442\u0430 \u0441\u043e\u0441\u0442\u043e\u044f\u043b\u043e\u0441\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u0435\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 Memcached \u0434\u043e \u0432\u0435\u0440\u0441\u0438\u0438 1.6.0. \u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0435 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445 \u0440\u0435\u043b\u0438\u0437\u043e\u0432 \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0442\u0435\u043f\u0435\u0440\u044c \u0434\u043b\u044f \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0442\u0430\u043b\u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0432\u043d\u0435\u0448\u043d\u0435\u0435 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u043e. Memcached \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0432\u044b\u0441\u043e\u043a\u043e\u043d\u0430\u0433\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u0441\u0430\u0439\u0442\u043e\u0432 \u0438\u043b\u0438 \u0432\u0435\u0431-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043f\u0443\u0442\u0451\u043c \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0421\u0423\u0411\u0414 \u0438 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u043c \u0434\u0430\u043d\u043d\u044b\u043c. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u0440\u0438 \u0441\u0431\u043e\u0440\u043a\u0435 \u043f\u043e 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