{"id":73426,"date":"2020-03-09T14:42:13","date_gmt":"2020-03-09T11:42:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-memcached-1-6-0-s-vklyucheniem-podderzhki-vneshnego-hranilishha"},"modified":"2020-03-09T14:42:13","modified_gmt":"2020-03-09T11:42:13","slug":"reliz-memcached-1-6-0-s-vklyucheniem-podderzhki-vneshnego-hranilishha","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/reliz-memcached-1-6-0-s-vklyucheniem-podderzhki-vneshnego-hranilishha","title":{"rendered":"A Memcached 1.6.0 kiad\u00e1sa k\u00fcls\u0151 t\u00e1rol\u00f3 t\u00e1mogat\u00e1s\u00e1nak bekapcsol\u00e1s\u00e1val","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Megval\u00f3sult<\/a><\/noindex> jelent\u0151s kiad\u00e1sa az adatokat mem\u00f3ri\u00e1ban cachel\u0151 rendszernek Memcached 1.6.0<\/a><\/noindex>, kulcs\/\u00e9rt\u00e9k form\u00e1tumban kezelt adatokkal, amely a haszn\u00e1lat egyszer\u0171s\u00e9g\u00e9r\u0151l ismert. A Memcached \u00e1ltal\u00e1ban k\u00f6nny\u0171 megold\u00e1sk\u00e9nt szolg\u00e1l a nagy forgalm\u00fa webhelyek teljes\u00edtm\u00e9ny\u00e9nek n\u00f6vel\u00e9s\u00e9re az adatb\u00e1zis \u00e9s a k\u00f6zbens\u0151 adatok el\u00e9r\u00e9s\u00e9nek cache-el\u00e9s\u00e9vel. K\u00f3d sz\u00e1ll\u00edtva van<\/a><\/noindex> BSD licenc alatt.<\/p>\n

Az \u00faj verzi\u00f3 stabiliz\u00e1lta a t\u00e1rol\u00f3 megval\u00f3s\u00edt\u00e1s\u00e1t «extstore<\/a><\/noindex>«, amely mostant\u00f3l alap\u00e9rtelmez\u00e9s szerint \u00f6ssze\u00e1ll\u00edt\u00e1sra ker\u00fcl (az 'extstore' letilt\u00e1s\u00e1hoz a configure szkriptben megadhat\u00f3 az «—disable-extstore» opci\u00f3), de explicit aktiv\u00e1l\u00e1st ig\u00e9nyel a futtat\u00e1skor (a r\u00e9gi telep\u00edt\u00e9sek az friss\u00edt\u00e9s ut\u00e1n v\u00e1ltoztat\u00e1s n\u00e9lk\u00fcl fognak m\u0171k\u00f6dni). Annyira, hogy az 'extstore' t\u00e1rol\u00f3t \u00e1ltal\u00e1ban stabilnak \u00edt\u00e9lik, aj\u00e1nlott k\u00f6r\u00fcltekint\u0151en bevezetni nagyon nagy rendszerekbe.<\/p>\n

Az Extstore lehet\u0151v\u00e9 teszi SSD\/Flash meghajt\u00f3k haszn\u00e1lat\u00e1t a gyors\u00edt\u00f3t\u00e1r m\u00e9ret\u00e9nek kib\u0151v\u00edt\u00e9s\u00e9re. Ahogyan a RAM haszn\u00e1latakor, a Flash t\u00e1rol\u00f3 nem tart\u00f3s, \u00e9s \u00fajraind\u00edt\u00e1skor t\u00f6rl\u0151dik. Az \u00faj m\u00f3dszer alkalmaz\u00e1si ter\u00fclete az nagy m\u00e9ret\u0171 adatok hat\u00e9kony gyors\u00edt\u00f3t\u00e1raz\u00e1s\u00e1nak biztos\u00edt\u00e1sa. Az 'extstore' haszn\u00e1latakor a kulcsok \u00e9s metadat\u00e1k, mint kor\u00e1bban, csak a mem\u00f3ri\u00e1ban t\u00e1rol\u00f3dnak, de a kulcsokkal kapcsolatos nagym\u00e9ret\u0171 adatok, amelyek meghaladj\u00e1k a be\u00e1ll\u00edtott k\u00fcsz\u00f6b\u00f6t, k\u00fcls\u0151 t\u00e1rol\u00f3ban ker\u00fclnek meg\u0151rz\u00e9sre, m\u00edg a RAM-ban csak a mutat\u00f3 marad. <\/p>\n

Ha egy kulcshoz kis m\u00e9ret\u0171 adatok kapcsol\u00f3dnak, a Memcached norm\u00e1l m\u00f3don m\u0171k\u00f6dik, az adatokat a mem\u00f3ri\u00e1ban tartja, \u00e9s nem h\u00edvja meg a k\u00fcls\u0151 t\u00e1rol\u00f3t. Ha sok szabad mem\u00f3ria van, a legkeresettebb adatok tov\u00e1bbiakban teljes m\u00e9rt\u00e9kben a RAM-ban is t\u00e1rol\u00f3dhatnak (p\u00e9ld\u00e1ul jelentheti, hogy a Flash-ra csak az 1024 b\u00e1jtn\u00e1l nagyobb objektumokat \u00edrunk ki, amelyeket nem k\u00e9rtek 3600 m\u00e1sodpercen bel\u00fcl »).<\/p>\n

A megval\u00f3s\u00edt\u00e1s optimaliz\u00e1lva van a maxim\u00e1lis teljes\u00edtm\u00e9ny \u00e9s a minim\u00e1lis CPU terhel\u00e9s biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben, a t\u00e1rol\u00e1s hat\u00e9konys\u00e1g\u00e1nak rov\u00e1s\u00e1ra (nagy t\u00f6redezetts\u00e9g). A Flash meghajt\u00f3k hosszabb \u00e9lettartama \u00e9rdek\u00e9ben az adatok p\u00e1rhuzamosan gyors\u00edt\u00f3t\u00e1raz\u00f3dnak \u00e9s t\u00e1rol\u00f3dnak. A gyors\u00edt\u00f3t\u00e1r \u00e1llapot\u00e1nak meg\u0151rz\u00e9s\u00e9re \u00faj lehet\u0151s\u00e9g alkalmazhat\u00f3, amely a 1.5.18-as kiad\u00e1sban jelent meg, hogy a gyors\u00edt\u00f3t\u00e1r dumpj\u00e1t egy f\u00e1jlba lehessen ki\u00fcr\u00edteni. A k\u00f6vetkez\u0151 ind\u00edt\u00e1skor a gyors\u00edt\u00f3t\u00e1r ebb\u0151l a f\u00e1jlb\u00f3l vissza\u00e1ll\u00edthat\u00f3, hogy elker\u00fclj\u00fck a cs\u00facs terhel\u00e9st a tartalomkezel\u0151k\u00f6n a gyors\u00edt\u00f3t\u00e1r ki\u00fcr\u00fcl\u00e9se miatt (a gyors\u00edt\u00f3t\u00e1r azonnal 'meleg' lesz).<\/p>\n

A Memcached 1.6 m\u00e1sodik fontos v\u00e1ltoz\u00e1sa a h\u00e1l\u00f3zati kommunik\u00e1ci\u00f3 k\u00f3dj\u00e1nak \u00e1tdolgoz\u00e1sa, amelyet arra optimaliz\u00e1ltak, hogy automatikusan kezelje a csomagolt h\u00edv\u00e1sokat egy rendszerh\u00edv\u00e1s keretein bel\u00fcl. Kor\u00e1bban, amikor t\u00f6bb 'GET' parancsot tov\u00e1bb\u00edtottak egy TCP-csomagban, a memcached k\u00fcl\u00f6n rendszerh\u00edv\u00e1sokkal k\u00fcldte el az eredm\u00e9nyeket. A Memcached 1.6 verzi\u00f3ban a v\u00e1laszok aggreg\u00e1l\u00f3dnak, \u00e9s egyetlen rendszerh\u00edv\u00e1son kereszt\u00fcl t\u00e9rnek vissza. Ennek eredm\u00e9nyek\u00e9nt \u00e1tlagosan 1,5 kulcs tartozik egy rendszerh\u00edv\u00e1shoz, ami a tesztek sor\u00e1n 25%-os CPU-terhel\u00e9scs\u00f6kkent\u00e9st \u00e9s n\u00e9h\u00e1ny sz\u00e1zal\u00e9kos k\u00e9sleltet\u00e9scs\u00f6kkent\u00e9st mutat.<\/p>\n

A h\u00e1l\u00f3zati alrendszer \u00e1tdolgoz\u00e1sa lehet\u0151v\u00e9 tette a dinamikus pufferel\u00e9sre val\u00f3 \u00e1tt\u00e9r\u00e9st, nem pedig statikus pufferallok\u00e1l\u00e1sra. Ez az optimaliz\u00e1l\u00e1s a mem\u00f3riafelhaszn\u00e1l\u00e1st az \u00faj parancsok v\u00e1rakoz\u00e1si idej\u00e9ben 4,5 KB-r\u00f3l 400-500 byte-ra cs\u00f6kkentette, valamint lehet\u0151v\u00e9 tette sz\u00e1mos malloc, realloc \u00e9s free h\u00edv\u00e1s elt\u00e1vol\u00edt\u00e1s\u00e1t, amely felesleges mem\u00f3riafragment\u00e1ci\u00f3t okozott a sok kapcsolattal rendelkez\u0151 rendszerekben. Minden munkafolyamat most a saj\u00e1t pufferpoolj\u00e1t kezeli az akt\u00edv klienskapcsolatok olvas\u00e1s\u00e1hoz \u00e9s \u00edr\u00e1s\u00e1hoz. Ezeknek a puffernek a m\u00e9ret\u00e9nek a be\u00e1ll\u00edt\u00e1s\u00e1ra
\nel\u00e9rhet\u0151k az '-o resp_obj_mem_limit=N' \u00e9s az '-o read_buf_mem_limit=N' opci\u00f3k.<\/p>\n

A 1.6-os \u00e1gon a bin\u00e1ris protokoll elavults\u00e1g\u00e1nak bejelent\u00e9s\u00e9re is sor ker\u00fclt. a szerverrel val\u00f3 interakci\u00f3hoz. A bin\u00e1ris protokoll karbantart\u00e1sa \u00e9s a hib\u00e1k jav\u00edt\u00e1sa folytat\u00f3dik, de \u00faj funkci\u00f3k \u00e9s a megl\u00e9v\u0151 funkci\u00f3k friss\u00edt\u00e9se nem lesz t\u00e1mogatva.<\/a><\/noindex> Textu\u00e1lis protokoll sz\u00f6veges protokoll<\/a><\/noindex> a folytat\u00e1s a fejl\u0151d\u00e9s v\u00e1ltozatlan marad. A bin\u00e1ris protokoll helyett egy \u00faj protokoll l\u00e9pett \u00e9letbe meta<\/a><\/noindex> (a protokoll sz\u00f6veges v\u00e1ltozata kompakt meta-parancsokkal), amely az optim\u00e1lis teljes\u00edtm\u00e9ny \u00e9s megb\u00edzhat\u00f3s\u00e1g kombin\u00e1ci\u00f3j\u00e1t mutatja be. Az \u00faj protokoll lefedi az \u00f6sszes m\u0171veletet, amelyek kor\u00e1bban el\u00e9rhet\u0151k voltak sz\u00f6veges \u00e9s bin\u00e1ris protokollokon kereszt\u00fcl.<\/p>\n

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0432\u0435\u0440\u0441\u0438\u0438 \u0441\u0442\u0430\u0431\u0438\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 «extstore«, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0442\u0435\u043f\u0435\u0440\u044c \u0441\u043e\u0431\u0438\u0440\u0430\u0435\u0442\u0441\u044f \u043f\u043e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-73426","post","type-post","status-publish","format-standard","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\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A Memcached 1.6.0 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