{"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\/hr\/blog\/news\/vypusk-vstraivaemoj-subd-libmdbx-0-13","title":{"rendered":"Izdan je ugra\u0111eni DBMS libmdbx 0.13","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljen je izdanje biblioteke libmdbx 0.13.1 (MDBX) koja implementira visoko performantnu kompaktnu ugra\u0111enu bazu podataka tipa klju\u010d-vrednost. Kod libmdbx se distribuira pod Apache 2.0 licencom. Podr\u017eani su svi aktuelni operativni sistemi i arhitekture, kao i ruski Elbrus 2000. Za libmdbx je dostupno razvijeno API za C++, kao i podr\u017eane veze za jezike Rust, Haskell, Python, NodeJS, Ruby, Go, Nim, Deno, Scala.      <\/p>\n<p>Historijski, libmdbx je duboka prerada DBMS-a LMDB i nadma\u0161uje svog predka u pouzdanosti, spektrom mogu\u0107nosti i performansama. U usporedbi s LMDB, libmdbx pridaje veliku pa\u017enju kvaliteti koda, stabilnom radu API-ja, testiranju i automatskim provjerama. Nudi se alat za provjeru cjelovitosti strukture Baze podataka s nekim mogu\u0107nostima oporavka. Tehnolo\u0161ki, libmdbx nudi ACID, strogu serijalizaciju promjena i neblokiraju\u0107e \u010ditanje s linearno skalabilnim procesorima.        <\/p>\n<p>Glavne promjene:  <\/p>\n<ul>\n<li class=\"l\"> Promena licence za kod sa OpenLDAP Public License na Apache 2.0.\n<li class=\"l\">  Pro\u0161irenje API-a kursorima sa pogodnijim i o\u010diglednijim operacijama pozicioniranja prema uslovima &lt;, =, &gt; kako za klju\u010deve, tako i za parove klju\u010d-vrednost. Dodate su funkcije mdbx_cursor_unbind() i mdbx_txn_release_all_cursors() za fleksibilno upravljanje kursorima u scenarijima ponovne upotrebe radi smanjenja tro\u0161kova. Funkcije mdbx_cursor_scan() i mdbx_cursor_scan_from() za skeniranje tabela kori\u0161\u0107enjem funkcionalnog predikata i smanjenjem prate\u0107ih tro\u0161kova.\n<li class=\"l\"> Redizajn kursorima za unifikaciju pona\u0161anja, regulisanje koda i smanjenje broja razgranata i ma\u0161inskih operacija.\n<li class=\"l\"> Premestiti funkcionalnost alata mdbx_chk unutar biblioteke u obliku funkcije mdbx_env_chk() za proveru integriteta strukture Baze podataka, uklju\u010duju\u0107i uklju\u010divanje logike aplikacije.\n<li class=\"l\"> Opcija MDBX_opt_gc_time_limit za fleksibilniju kontrolu vremena tro\u0161enog na pretragu sekvenci susednih slobodnih stranica u GC.\n<li class=\"l\"> Zna\u010dajno smanjenje tro\u0161kova pokretanja transakcija u scenarijima sa velikim brojem DBI handlers, zahvaljuju\u0107i odlo\u017eenoj\/lenjivoj inicijalizaciji elemenata pomo\u0107nih tabela. Uklju\u010duju\u0107i mehanizam podr\u0161ke za razre\u0111ene skupove DBI handlera, upravljan opcijom kompilacije MDBX_ENABLE_DBI_SPARSE, koja je uklju\u010dena po defaultu.\n<li class=\"l\"> Smanjenje tro\u0161kova otvaranja DBI handlera. Uklju\u010duju\u0107i mehanizam odlo\u017eenog osloba\u0111anja i podr\u0161ke brzog otvaranja bez kori\u0161\u0107enja zaklju\u010davanja, upravljan opcijom kompilacije MDBX_ENABLE_DBI_LOCKFREE, koja je uklju\u010dena po defaultu.\n<li class=\"l\"> Podr\u0161ka za \"parkiranje\" transakcija \u010ditatelja s njihovim izbacivanjem radi prerade starih MVCC snimaka i sprje\u010davanja problema uzrokovanih zaustavljanjem prerade sme\u0107a. Mehanizam parkiranja i izbacivanja parkiranih transakcija predstavlja dodatak, ali i jednostavniju alternativu povratnom pozivu Handle-Slow-Readers. Za udobnost, funkcije mdbx_txn_park() i mdbx_txn_unpark() imaju dodatne argumente koji omogu\u0107uju zahtjev za automatskim \"odparkiranjem\" parkiranih i ponovnim pokretanjem izba\u010denih transakcija. U alat mdbx_copy dodane su odgovaraju\u0107e opcije -d i -p.\n<li class=\"l\"> Podr\u0161ka za vra\u0107anje otvorenog radnog okru\u017eenja baze podataka u dje\u010djem procesu nakon grananja\/razdvajanja procesa putem mdbx_env_resurrect_after_fork().\n<li class=\"l\"> Podr\u0161ka za preimenovanje tablica putem mdbx_dbi_rename() i mdbx_dbi_rename2(). Dodana funkcija mdbx_enumerate_tables() za dobivanje informacija o imenovanim korisni\u010dkim tablicama.\n<li class=\"l\">  Na\u010din rada MDBX_NOSTICKYTHREADS umjesto MDBX_NOTLS radi pojednostavljenja integracije s laganim nitima\/multiplexiranjem njih zajedno s transakcijama osnovnog operativnog sustava.\n<li class=\"l\"> Za identifikaciju baze podataka dodan je UUID dostupan u polju mi_dxbid strukture MDBX_envinfo, dobivenoj putem mdbx_env_info_ex(). Implementirano je dobivanje informacija o bazi podataka bez njenog otvaranja putem mdbx_preopen_snapinfo().\n<li class=\"l\"> Podr\u0161ka za funkcije dnevni\u010dkog poziva bez funkcionalnosti vprintf(), \u0161to znatno olak\u0161ava kori\u0161tenje dnevni\u010dkog zapisa u vezama s drugim programskim jezicima.\n<li class=\"l\">  Dodavanje funkcija u API mdbx_txn_copy2pathname() i mdbx_txn_copy2fd().\n<li class=\"l\"> Restrukturiranje izvornog koda uz refaktoriranje.\n<li class=\"l\"> Upotreba termina \u201etablica\u201c umjesto \u201esubDb\u201c.\n<li class=\"l\"> Objavljivanje opcija MDBX_COALESCE i MDBX_NOTLS kao zastarjelih. Zamjena opcije za izgradnju MDBX_USE_VALGRIND u op\u0107eprihva\u0107enu ENABLE_MEMCHECK.        <\/ul>\n<p>Izvor: <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 5.0.4 - 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