{"id":119737,"date":"2024-09-09T03:43:00","date_gmt":"2024-09-09T01:43:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-vstraivaemoj-subd-libmdbx-0-13"},"modified":"2024-09-09T03:43:00","modified_gmt":"2024-09-09T01:43:00","slug":"vypusk-vstraivaemoj-subd-libmdbx-0-13","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/vypusk-vstraivaemoj-subd-libmdbx-0-13","title":{"rendered":"V\u00e4lja on antud sisseehitatud andmebaas libmdbx 0.13","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Avaldatud on libmdbx 0.13.1 (MDBX) raamatukogu versioon, mis sisaldab k\u00f5rge j\u00f5udlusega kompaktset ning sisseehitatud v\u00f5tme-v\u00e4\u00e4rtuse andmebaasi. libmdbx kood levitatakse Apache 2.0 litsentsiga. Toetatakse k\u00f5iki kaasaegseid operatsioonis\u00fcsteeme ja arhitektuure, sealhulgas Venemaa Elbrus 2000. libmdbx jaoks on saadaval arenenud API C++-le ning toetatud on ka entusiastide loodud sidemed Rusti, Haskell'i, Pythoni, NodeJS, Ruby, Go, Nim, Deno, Scala jaoks.      <\/p>\n<p>Ajalooliselt on libmdbx s\u00fcgavalt \u00fcmber t\u00f6\u00f6delud andmebaas LMDB-st ning \u00fcletab oma eelk\u00e4ijat usaldusv\u00e4\u00e4rsuse, v\u00f5imaluste ja j\u00f5udluse poolest. LMDB-ga v\u00f5rreldes on libmdbx-is suurt t\u00e4helepanu p\u00f6\u00f6ratud koodi kvaliteedile, API stabiilsele toimimisele, testimisele ja automaatsetele kontrollidele. Saadaval on andmebaasi struktuuri terviklikkuse kontrollimise utiliit m\u00f5ningate taastamisv\u00f5imalustega. Tehnoloogiliselt pakub libmdbx ACID-i, ranget muudatuste seeriat ja mittetakistavat lugemist, millel on lineaarne skaleerimine CPU tuumade vahel. Toetatud on automaatne kompaktimine, andmebaasi suuruse automaatne haldamine ning vahemike p\u00f5hjal tehtud valimite hindamine.        <\/p>\n<p>Peamised muudatused:  <\/p>\n<ul>\n<li class=\"l\"> Koodi litsentsi muutmine OpenLDAP Public License'ist Apache 2.0-ks.\n<li class=\"l\">  Kursorite API laiendamine mugavamate ja selgemate positsioneerimise operatsioonidega, mis on sarnased tingimustele &lt;, &lt;=, ==, &gt;=, &gt; nii v\u00f5tmete kui ka v\u00f5tme-v\u00e4\u00e4rtuse paaride jaoks. Lisatud funktsioonid mdbx_cursor_unbind() ja mdbx_txn_release_all_cursors() kursorite paindlikuks haldamiseks taaskasutusstsenaariumites, et v\u00e4hendada kulusid. Funktsioonid mdbx_cursor_scan() ja mdbx_cursor_scan_from() tabelite skaneerimiseks, kasutades funktsionaalset predikaati ja v\u00e4hendades sellega kaasnevaid kulusid.\n<li class=\"l\"> Kursorite \u00fcmberkujundamine k\u00e4itumise \u00fchtlustamiseks, koodi \u00fchtlustamiseks, haru ja masinatoimingute arvu v\u00e4hendamiseks.\n<li class=\"l\"> mdbx_chk utiliidi funktsionaalsuse viimine raamatukogusse kujul mdbx_env_chk() funktsiooni, et kontrollida andmebaasi struktuuri terviklikkust, sealhulgas rakenduse loogika kaasama.\n<li class=\"l\"> MDBX_opt_gc_time_limit v\u00f5imalus, et paindlikumalt hallata aega, mis kulub naaber vabad lehek\u00fclgede j\u00e4rjestuste otsimiseks GC-s.\n<li class=\"l\"> Oluline kulude v\u00e4henemine tehingute alustamisel stsenaariumites, kus on suur hulk DBI-handleid, t\u00e4nu edasi l\u00fckatud\/halvale algatamisele teenustabelite elementide puhul. Sealhulgas mehhanism haruldaste DBI-handleid haldamiseks, mida juhtib kompilatsiooni valik MDBX_ENABLE_DBI_SPARSE, mis on vaikimisi sisse l\u00fclitatud.\n<li class=\"l\"> DBI-handleid avamise kulude v\u00e4hendamine. Sealhulgas edasi l\u00fckatud vabastamise mehhanism ja kiire avamise toega, mis ei kasuta lukke, mida juhib kompilatsiooni valik MDBX_ENABLE_DBI_LOCKFREE, mis on vaikimisi sisse l\u00fclitatud.\n<li class=\"l\"> Toetab \u00f5igeaegse lugemise tehingute \"parklate\" toetamine, mis t\u00f5rjub v\u00e4lja vanade MVCC-piltide t\u00f6\u00f6tlemise ja takistab probleeme, mis tekivad j\u00e4\u00e4tmete t\u00f6\u00f6tlemise peatamisel. Parkimise ja v\u00e4lja t\u00f5ukamise mehhanism on nii t\u00e4iendus kui ka lihtsam kasutada alternatiiv tagasihelikuga Handle-Slow-Readers. Mugavuse huvides sisaldavad funktsioonid mdbx_txn_park() ja mdbx_txn_unpark() lisaparameetreid, mis v\u00f5imaldavad automaatset \"maha parkimist\" ja v\u00e4lja t\u00f5ugatud tehingute \u00fcmberk\u00e4imist. Utility mdbx_copy on lisatud vastavad valikud -d ja -p.\n<li class=\"l\"> Toetab avatud andmebaasi t\u00f6\u00f6keskkonna taastamist t\u00fctarprotsessis p\u00e4rast protsessi harunemist\/jaotumist mdbx_env_resurrect_after_fork() kaudu.\n<li class=\"l\"> Toetab tabelite \u00fcmbernimetamist mdbx_dbi_rename() ja mdbx_dbi_rename2() kaudu. Lisatud on funktsioon mdbx_enumerate_tables(), et saada teavet nimetatud kasutaja tabelite kohta.\n<li class=\"l\">  MDBX_NOSTICKYTHREADS t\u00f6\u00f6re\u017eiim MDBX_NOTLS asemel, et lihtsustada integreerimist kergete voogude\/nit\u0161itega nende mitme \u00fclesande t\u00e4itmisega koos operatsioonis\u00fcsteemi voogude tehingutega.\n<li class=\"l\"> Andmebaasi identifitseerimiseks on lisatud UUID, mis on saadaval v\u00e4ljal mi_dxbid MDBX_envinfo struktuuris, mille saab k\u00e4tte mdbx_env_info_ex() kaudu. Teostatud on andmebaasi teabe saamine selle avamata mdbx_preopen_snapinfo() kaudu.\n<li class=\"l\"> Toetab tagasiside logimise funktsioone ilma vprintf() funktsionaalsuseta, mis oluliselt lihtsustab logimise kasutamist teiste programmeerimiskeelte raamistikes.\n<li class=\"l\">  API funktsioonide mdbx_txn_copy2pathname() ja mdbx_txn_copy2fd() lisamine.\n<li class=\"l\"> Algkoodi restruktureerimine koos refaktooringuga.\n<li class=\"l\"> Termini \"tabel\" kasutamine asemele \"subDb\".\n<li class=\"l\"> MDBX_COALESCE ja MDBX_NOTLS valikute kuulutamine aegunuks. Kokkuv\u00f5tte opsioon MDBX_USE_VALGRIND asendamine \u00fcldiselt aktsepteeritud ENABLE_MEMCHECKiga.        <\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61830\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libmdbx 0.13.1 (MDBX) \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0439 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445 \u043a\u043b\u0430\u0441\u0441\u0430 \u043a\u043b\u044e\u0447-\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435. \u041a\u043e\u0434 libmdbx \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u0441\u0435 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0438 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0439 \u042d\u043b\u044c\u0431\u0440\u0443\u0441 2000. \u0414\u043b\u044f libmdbx \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0440\u0430\u0437\u0432\u0438\u0442\u043e\u0435 API \u0434\u043b\u044f C++, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u044d\u043d\u0442\u0443\u0437\u0438\u0430\u0441\u0442\u0430\u043c\u0438 \u043f\u0440\u0438\u0432\u044f\u0437\u043a\u0438 \u043a \u044f\u0437\u044b\u043a\u0430\u043c Rust, Haskell, Python, NodeJS, Ruby, Go, Nim, [&hellip;]<\/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-119737","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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