{"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\/sv\/blog\/news\/vypusk-dragonfly-1-0-sistemy-dlya-keshirovaniya-dannyh-v-operativnoj-pamyati","title":{"rendered":"Lansering av Dragonfly 1.0, ett system f\u00f6r caching av data i RAM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Lanseringen av datacaching- och lagringssystemet Dragonfly har \u00e4gt rum, som manipulerar data i nyckel\/v\u00e4rde-format och kan anv\u00e4ndas som en l\u00e4ttviktsl\u00f6sning f\u00f6r att \u00f6ka hastigheten p\u00e5 h\u00f6gbelastade webbplatser, cacha l\u00e5ngsamma databaskommandon och mellanliggande data i RAM. Dragonfly st\u00f6der protokollen Memcached och Redis, vilket g\u00f6r att man kan anv\u00e4nda redan existerande klientbibliotek och utan omarbetning av koden \u00f6verf\u00f6ra projekt som anv\u00e4nder Memcached och Redis till Dragonfly.     <\/p>\n<p>I tester har Dragonfly uppn\u00e5tt en 25-faldig prestations\u00f6kning j\u00e4mf\u00f6rt med Redis vid typiska belastningar i milj\u00f6n Amazon EC2 c6gn.16xlarge (3,8 miljoner f\u00f6rfr\u00e5gningar per sekund). J\u00e4mf\u00f6rt med Memcached i AWS-milj\u00f6n c6gn.16xlarge kunde Dragonfly utf\u00f6ra 4,7 g\u00e5nger fler skrivf\u00f6rfr\u00e5gningar per sekund (3,8 miljoner mot 806 tusen) och 1,77 g\u00e5nger fler l\u00e4sf\u00f6rfr\u00e5gningar per sekund (3,7 miljoner mot 2,1 miljoner).      <center><img decoding=\"async\" alt=\"Lansering av Dragonfly 1.0, ett system f\u00f6r caching av data i RAM \" src=\"\/wp-content\/uploads\/2023\/03\/417fdc86dc7d80eb097e3f198f888020.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>\u0412 \u0442\u0435\u0441\u0442\u0430\u0445 \u043d\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435 5 \u0413\u0411 \u0434\u0430\u043d\u043d\u044b\u0445 Dragonfly \u043f\u043e\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043b \u043d\u0430 30% \u043c\u0435\u043d\u044c\u0448\u0435 \u043f\u0430\u043c\u044f\u0442\u0438, \u0447\u0435\u043c Redis. \u0412\u043e \u0432\u0440\u0435\u043c\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0441\u043d\u0430\u043f\u0448\u043e\u0442\u043e\u0432 \u043a\u043e\u043c\u0430\u043d\u0434\u043e\u0439 &#171;bgsave&#187;  \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u0435 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432\u043e\u0437\u0440\u0430\u0441\u0442\u0430\u0435\u0442, \u043d\u043e \u0432 \u043f\u0438\u043a\u043e\u0432\u044b\u0435 \u043c\u043e\u043c\u0435\u043d\u0442\u044b \u043e\u043d\u043e \u043e\u0441\u0442\u0430\u0432\u0430\u043b\u043e\u0441\u044c \u043f\u043e\u0447\u0442\u0438 \u0432 \u0442\u0440\u0438 \u0440\u0430\u0437\u0430 \u043c\u0435\u043d\u044c\u0448\u0435, \u0447\u0435\u043c \u0432 Redis, \u0430 \u0441\u0430\u043c\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u0437\u0430\u043f\u0438\u0441\u0438 \u0441\u043d\u0430\u043f\u0448\u043e\u0442\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0431\u044b\u0441\u0442\u0440\u0435\u0435 (\u0432 \u0442\u0435\u0441\u0442\u0435 \u0441\u043d\u0430\u043f\u0448\u043e\u0442 \u0432 Dragonfly \u0431\u044b\u043b \u0437\u0430\u043f\u0438\u0441\u0430\u043d \u0437\u0430 30 \u0441\u0435\u043a\u0443\u043d\u0434, \u0430 Redis &#8212; \u0437\u0430 42 \u0441\u0435\u043a\u0443\u043d\u0434\u044b).    <\/p>\n<p><center><img decoding=\"async\" alt=\"Lansering av Dragonfly 1.0, ett system f\u00f6r caching av data i RAM \" src=\"\/wp-content\/uploads\/2023\/03\/ee8441f68081e5094bdaf20a54c1f918.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>H\u00f6g prestanda uppn\u00e5s genom en flerk\u00e4rnarkitektur utan resursdelning (shared-nothing), vilket inneb\u00e4r att varje tr\u00e5d kopplas till en separat, avskild behandlare med sin egen del av data, som arbetar utan mutexar och spin-l\u00e5s. F\u00f6r att s\u00e4kerst\u00e4lla atom\u00e4ritet vid arbete med flera nycklar anv\u00e4nds l\u00e4tta l\u00e5s VLL. F\u00f6r effektiv lagring av information i minnet till\u00e4mpas strukturen dashtable, som implementerar en variant av sektionerade hash-tabeller.    <\/p>\n<p>N\u00e5gra av funktionerna i Dragonfly:  <\/p>\n<ul>\n<li class=\"l\"> Cachingl\u00e4ge d\u00e4r gamla data automatiskt ers\u00e4tts av nya efter att det fria minnet har tagits slut.\n<li class=\"l\"> St\u00f6d f\u00f6r att binda data till en livsl\u00e4ngd, under vilken data betraktas som aktuella.\n<li class=\"l\"> St\u00f6d f\u00f6r att \u00e5terst\u00e4lla lagringssystemet till disk i bakgrunden f\u00f6r \u00e5terst\u00e4llning efter omstart.\n<li class=\"l\"> HTTP-konsol (kopplad till TCP-port 6379) f\u00f6r systemhantering och API f\u00f6r att leverera metrics, kompatibel med Prometheus.\n<li class=\"l\"> St\u00f6d f\u00f6r 185 Redis-kommandon, vilket ungef\u00e4r motsvarar funktionaliteten i Redis version 5.\n<li class=\"l\"> St\u00f6d f\u00f6r alla Memcached-kommandon, f\u00f6rutom CAS (check-and-set).\n<li class=\"l\"> St\u00f6d f\u00f6r asynkrona operationer f\u00f6r skapande av snapshots.\n<li class=\"l\"> F\u00f6ruts\u00e4gbart minnesutnyttjande.\n<li class=\"l\"> Inbyggd Lua 5.4-tolk.\n<li class=\"l\"> St\u00f6d f\u00f6r komplexa datatyper som hash, m\u00e4ngder, listor (ZSET, HSET, LIST, SETS och STRING) samt data i JSON-format.\n<li class=\"l\"> St\u00f6d f\u00f6r lagringsreplikering f\u00f6r att s\u00e4kerst\u00e4lla felresilens och belastningsbalansering.  <\/ul>\n<p>Koden f\u00f6r Dragonfly \u00e4r skriven i C\/C++ och distribueras under BSL (Business Source License). BSL-lisensen f\u00f6reslogs av medgrundarna till MySQL som ett alternativ till Open Core-modellen. K\u00e4rnan i BSL \u00e4r att koden f\u00f6r ut\u00f6kad funktionalitet initialt \u00e4r tillg\u00e4nglig f\u00f6r \u00e4ndringar, men under en viss tid kan den gratis anv\u00e4ndas endast under vissa villkor, vars omg\u00e5else kr\u00e4ver k\u00f6p av en kommersiell licens. De ytterligare licensvillkoren f\u00f6r Dragonfly-projektet f\u00f6reskriver att koden ska \u00f6verf\u00f6ras till Apache 2.0-licens den 15 mars 2028. Fram till dess till\u00e5ter licensen anv\u00e4ndningen av koden endast f\u00f6r att underst\u00f6dja sina egna tj\u00e4nster och produkter, men f\u00f6rbjuder anv\u00e4ndning f\u00f6r att skapa betalande molntj\u00e4nster som st\u00e5r ovanf\u00f6r Dragonfly.      <\/p>\n<p>Version 1.0 av Dragonfly \u00e4r anm\u00e4rkningsv\u00e4rd f\u00f6r genomf\u00f6randet av st\u00f6d f\u00f6r datareplication fr\u00e5n prim\u00e4r <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sv\/server\/dts-los-angeles\/\"   title=\"servern\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3900\">servern<\/a> till sekund\u00e4r. Dragonfly kan st\u00e4llas in f\u00f6r att anv\u00e4ndas som sekund\u00e4r lagring som tar emot data fr\u00e5n den prim\u00e4ra servern, b\u00e5de baserat p\u00e5 Dragonfly och Redis. API:et f\u00f6r hantering av replikering \u00e4r kompatibelt med Redis och baseras p\u00e5 kommandona ROLE och REPLICAOF (SLAVEOF).<br \/>\n<br \/>K\u00e4lla: <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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