{"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\/da\/blog\/news\/memcached-1-6-0-sistema-keshirovaniya-dannyh-v-ozu-s-vozmozhnostyu-sohraneniya-na-vneshnem-nositele","title":{"rendered":"Memcached 1.6.0 \u2014 et system til caching af data i RAM med mulighed for lagring p\u00e5 eksterne enheder","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"


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

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

Den 8. marts blev opdateringen af datacaching-systemet i RAM gennemf\u00f8rt. Memcached<\/strong> til version 1.6.0<\/strong>. Den prim\u00e6re forskel fra tidligere versioner er, at det nu er muligt at bruge en ekstern enhed til lageret af cachedata.<\/p>\n

Memcached<\/strong> som anvendes til at accelerere driften af h\u00f8jt belastede websteder eller webapplikationer ved at cache adgangen til databaser og mellemresultater.<\/p>\n

I den nye version er parameteren extstore<\/strong>, som er ansvarlig for brugen af eksterne lagringsmedier. For at deaktivere funktionen skal du angive parameteren --disable-extstore i .\\\/configure. Men p\u00e5 trods af at denne funktion er aktiveret som standard, skal brugen af den angives direkte ved opstarten.<\/p>\n

Extstore<\/strong> muligg\u00f8r brugen af eksterne Flash<\/strong> eller SSD<\/strong> lagerl\u00f8sninger til at \u00f8ge cache-st\u00f8rrelsen. Dette tillader caching af meget st\u00f8rre datam\u00e6ngder end uden brug af denne funktion.<\/p>\n

En anden vigtig nyhed er moderniseringen af netv\u00e6rksinteraktionen, som nu er tilpasset til automatisk behandling af batch-anmodninger inden for \u00e9t systemopkald. I tidligere versioner blev hver GET-anmodning sendt i separate pakker, mens nye versioner samler svarene p\u00e5 flere anmodninger i \u00e9n metapakke og sender dem p\u00e5 \u00e9n gang. Som et resultat af denne opdatering er CPU-belastningen reduceret med 25%.<\/p>\n

Desuden har denne opgradering reduceret hukommelsesforbruget til buffering - fra 4,5 KB til 400-500 byte pr. opkald, og brugen af funktionerne malloc, realloc og free er ogs\u00e5 reduceret, hvilket har f\u00f8rt til mindre fragmentering af hukommelsen. Hver tr\u00e5d h\u00e5ndterer nu sin egen bufferpulje til l\u00e6sning og skrivning for aktive forbindelser. For at konfigurere st\u00f8rrelsen p\u00e5 disse buffere er der indf\u00f8rt mulighederne -o resp_obj_mem_limit=N og -o read_buf_mem_limt=N.<\/p>\n

Derudover blev det annonceret, at det bin\u00e6re protokol til kommunikation med serveren nu er blevet klassificeret som «for\u00e6ldet». Det er blevet afl\u00f8st af meta-protokollen - en tekstversion af protokollen med kompakte meta-kommandoer. Den nye protokol tager h\u00f8jde for alle operationer, som tidligere brugte de gamle versioner af den bin\u00e6re protokol.<\/p>\n

<\/p>\n

>>> Officiel hjemmeside<\/a><\/p>\n

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

>>> Kildekode<\/a> (BSD-license)<\/p>\n

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

>>> Beskrivelse af Extstore<\/a><\/p>\n

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

>>> Beskrivelse af meta-kommandoer<\/a><\/p>\n

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

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

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