{"id":107406,"date":"2023-03-22T18:48:16","date_gmt":"2023-03-22T16:48:17","guid":{"rendered":"https:\/\/prohoster.info\/?p=107406"},"modified":"2023-03-23T10:45:49","modified_gmt":"2023-03-23T08:45:49","slug":"vypusk-dragonfly-1-0-sistemy-dlya-keshirovaniya-dannyh-v-operativnoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/vypusk-dragonfly-1-0-sistemy-dlya-keshirovaniya-dannyh-v-operativnoj-pamyati","title":{"rendered":"Vydanie Dragonfly 1.0, syst\u00e9mu na cacheovanie d\u00e1t v opera\u010dnej pam\u00e4ti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol re\u017eim pre ukladanie a manipul\u00e1ciu s d\u00e1tami v pam\u00e4ti nazvan\u00fd Dragonfly, ktor\u00fd operuje s d\u00e1tami v form\u00e1te k\u013e\u00fa\u010d\/hodnota a m\u00f4\u017ee sl\u00fa\u017ei\u0165 ako \u013eahk\u00e9 rie\u0161enie na zr\u00fdchlenie v\u00fdkonu webov\u00fdch str\u00e1nok s vysokou z\u00e1\u0165a\u017eou, cache-uj\u00fac pomal\u00e9 dotazy k datab\u00e1zov\u00e9mu syst\u00e9mu a medzi \u00fadaje v pam\u00e4ti. Dragonfly podporuje protokoly Memcached a Redis, \u010do umo\u017e\u0148uje pou\u017e\u00edva\u0165 existuj\u00face klientsk\u00e9 kni\u017enice a bez prepracovania k\u00f3du presuni\u0165 projekty vyu\u017e\u00edvaj\u00face Memcached a Redis na Dragonfly.     <\/p>\n<p>V porovnan\u00ed s Redis, Dragonfly dosiahol pri typick\u00fdch z\u00e1\u0165a\u017eiach v prostred\u00ed Amazon EC2 c6gn.16xlarge 25-n\u00e1sobn\u00e9 zv\u00fd\u0161enie v\u00fdkonu (3,8 mili\u00f3na po\u017eiadaviek za sekundu). V porovnan\u00ed s Memcached v AWS prostred\u00ed c6gn.16xlarge sa Dragonfly podarilo vykona\u0165 4,7-kr\u00e1t viac z\u00e1pisov\u00fdch po\u017eiadaviek za sekundu (3,8 mili\u00f3na oproti 806 tis\u00edcam) a 1,77-kr\u00e1t viac \u010d\u00edtac\u00edch po\u017eiadaviek za sekundu (3,7 mili\u00f3na oproti 2,1 mili\u00f3na).      <center><img decoding=\"async\" alt=\"Vydanie Dragonfly 1.0, syst\u00e9mu na cacheovanie d\u00e1t v opera\u010dnej pam\u00e4ti \" src=\"\/wp-content\/uploads\/2023\/03\/417fdc86dc7d80eb097e3f198f888020.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>V testoch na ukladanie 5 GB d\u00e1t Dragonfly vy\u017eadoval o 30 % menej pam\u00e4te ako Redis. Pri vytv\u00e1ran\u00ed sn\u00edmok pr\u00edkazom &#171;bgsave&#187; sa spotreba pam\u00e4te zvy\u0161uje, ale v obdob\u00ed maxim\u00e1lneho za\u0165a\u017eenia zost\u00e1va takmer trikr\u00e1t ni\u017e\u0161ia ako v Redis, pri\u010dom samotn\u00e1 oper\u00e1cia z\u00e1pisu sn\u00edmku sa vykon\u00e1va v\u00fdrazne r\u00fdchlej\u0161ie (v teste bol sn\u00edmok v Dragonfly zap\u00edsan\u00fd za 30 sek\u00fand, zatia\u013e \u010do Redis - za 42 sek\u00fand).    <\/p>\n<p><center><img decoding=\"async\" alt=\"Vydanie Dragonfly 1.0, syst\u00e9mu na cacheovanie d\u00e1t v opera\u010dnej pam\u00e4ti \" src=\"\/wp-content\/uploads\/2023\/03\/ee8441f68081e5094bdaf20a54c1f918.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Vysok\u00fd v\u00fdkon je dosahovan\u00fd v\u010faka viacvl\u00e1knovej architekt\u00fare bez zdie\u013eania zdrojov (shared-nothing), \u010do znamen\u00e1, \u017ee k ka\u017ed\u00e9mu vl\u00e1knu je priraden\u00fd samostatn\u00fd izolovan\u00fd spracovate\u013e so svojou vlastnou sadou d\u00e1t, pracuj\u00faci bez mutexov a spin-z\u00e1mkov. Na zabezpe\u010denie atomicity pri pr\u00e1ci s viacer\u00fdmi k\u013e\u00fa\u010dmi s\u00fa pou\u017e\u00edvan\u00e9 \u013eahk\u00e9 z\u00e1mky VLL. Na efekt\u00edvne uchov\u00e1vanie inform\u00e1ci\u00ed v pam\u00e4ti sa pou\u017e\u00edva \u0161trukt\u00fara dashtable, ktor\u00e1 implementuje vari\u00e1ciu segmentovan\u00fdch hash-tabl\u00edc.    <\/p>\n<p>Niektor\u00e9 mo\u017enosti Dragonfly:  <\/p>\n<ul>\n<li class=\"l\"> Re\u017eim cacheovania, v ktorom sa automaticky zabezpe\u010duje vytl\u00e1\u010danie star\u00fdch d\u00e1t nov\u00fdmi po vy\u010derpan\u00ed vo\u013enej pam\u00e4te.\n<li class=\"l\"> Podpora viazanosti na \u017eivotnos\u0165 d\u00e1t, po\u010das ktorej s\u00fa \u00fadaje pova\u017eovan\u00e9 za aktu\u00e1lne.\n<li class=\"l\"> Podpora pozadia pre obnovu stavu \u00falo\u017eiska na disk pre n\u00e1sledn\u00e9 obnovenie po re\u0161tarte.\n<li class=\"l\"> Pr\u00edtomnos\u0165 HTTP konzoly (priraden\u00e1 k TCP portu 6379) na spr\u00e1vu syst\u00e9mu a API na poskytovanie metr\u00edk, kompatibiln\u00e9 s Prometheus.\n<li class=\"l\"> Podpora 185 pr\u00edkazov Redis, \u010do pribli\u017ene zodpoved\u00e1 funk\u010dnosti vydania Redis 5.\n<li class=\"l\"> Podpora v\u0161etk\u00fdch pr\u00edkazov Memcached okrem CAS (check-and-set).\n<li class=\"l\"> Podpora asynchr\u00f3nnych oper\u00e1ci\u00ed pre vytv\u00e1ranie snapshotov.\n<li class=\"l\"> Predv\u00eddate\u013en\u00e1 spotreba pam\u00e4te.\n<li class=\"l\"> Vstavan\u00fd interpret Lua 5.4.\n<li class=\"l\"> Podpora zlo\u017een\u00fdch typov d\u00e1t, ako s\u00fa hashe, mno\u017einy, zoznamy (ZSET, HSET, LIST, SETS a STRING) a \u00fadaje vo form\u00e1te JSON.\n<li class=\"l\"> Podpora replik\u00e1cie \u00falo\u017eiska pre zabezpe\u010denie odolnosti vo\u010di poruch\u00e1m a vyva\u017eovania z\u00e1\u0165a\u017ee.  <\/ul>\n<p>K\u00f3d Dragonfly je nap\u00edsan\u00fd v jazykoch C\/C++ a je distribuovan\u00fd pod licenciou BSL (Business Source License). Licenciu BSL navrhli spoluzakladatelia MySQL ako alternat\u00edvu k modelu Open Core. Podstatou BSL je, \u017ee k\u00f3d roz\u0161\u00edrenej funk\u010dnosti je spo\u010diatku dostupn\u00fd na \u00fapravy, av\u0161ak po\u010das ur\u010dit\u00e9ho obdobia m\u00f4\u017ee by\u0165 pou\u017e\u00edvan\u00fd zadarmo iba za dodr\u017eania \u010fal\u0161\u00edch podmienok, pri\u010dom na ob\u00eddenie t\u00fdchto podmienok je potrebn\u00e9 zak\u00fapenie komer\u010dnej licencie. \u010eal\u0161ie licen\u010dn\u00e9 podmienky projektu Dragonfly predpisuj\u00fa prevod k\u00f3du na licenciu Apache 2.0 15. marca 2028. Do tohto \u010dasu licencie povo\u013euje pou\u017e\u00edvanie k\u00f3du iba na zabezpe\u010denie prev\u00e1dzky vlastn\u00fdch slu\u017eieb a produktov, ale zakazuje pou\u017eitie na vytv\u00e1ranie platen\u00fdch cloudov\u00fdch slu\u017eieb, ktor\u00e9 nadstavuj\u00fa Dragonfly.      <\/p>\n<p>Verzia Dragonfly 1.0 je pozoruhodn\u00e1 realiz\u00e1ciou podpory replik\u00e1cie d\u00e1t z prim\u00e1rneho <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-los-angeles\/\"   title=\"servera\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3900\">servera<\/a> na sekund\u00e1rny. Dragonfly sa pritom d\u00e1 nastavi\u0165 na pou\u017eitie ako sekund\u00e1rne \u00falo\u017eisko, ktor\u00e9 prij\u00edma d\u00e1ta z prim\u00e1rneho servera bu\u010f na b\u00e1ze Dragonfly, alebo na b\u00e1ze Redis. API na spr\u00e1vu replik\u00e1cie je kompatibiln\u00e9 s Redis a je zalo\u017een\u00e9 na pou\u017eit\u00ed pr\u00edkazov ROLE a REPLICAOF (SLAVEOF).<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58830\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u0445\u0440\u0430\u043d\u0435\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 Dragonfly, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u0443\u0435\u0442 \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 \u043a\u043b\u044e\u0447\/\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u043a\u0430\u043a \u043b\u0435\u0433\u043a\u043e\u0432\u0435\u0441\u043d\u043e\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \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, \u043a\u044d\u0448\u0438\u0440\u0443\u044e\u0449\u0435\u0435 \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u044b\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043a \u0421\u0423\u0411\u0414 \u0438 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. Dragonfly \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u044b Memcached \u0438 Redis, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0443\u0436\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0438 \u0431\u0435\u0437 \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":107407,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-107406","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0438 \u0445\u0440\u0430\u043d\u0435\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 Dragonfly, \u043a\u043e\u0442\u043e\u0440\u0430\u044f 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