{"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\/sl\/blog\/news\/vypusk-vstraivaemoj-subd-libmdbx-0-13","title":{"rendered":"Izdavanje ugra\u0111ene DBMS libmdbx 0.13","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljeno je izdanje biblioteke libmdbx 0.13.1 (MDBX) sa implementacijom visoko performantne kompaktne ugra\u0111ene baze podataka klase klju\u010d-vrednost. Kod libmdbx se distribuira pod Apache 2.0 licencom. Podr\u017eani su svi aktuelni operativni sistemi i arhitekture, uklju\u010duju\u0107i ruski Elbrus 2000. Za libmdbx je dostupno razvijeno API za C++, kao i podr\u017eane entuzijasti\u010dne veze s jezicima Rust, Haskell, Python, NodeJS, Ruby, Go, Nim, Deno, Scala.      <\/p>\n<p>Istorijski, libmdbx predstavlja duboku preradu DBMS LMDB i nadma\u0161uje svog prethodnika u pouzdanosti, opsegu mogu\u0107nosti i performansama. U pore\u0111enju sa LMDB, libmdbx posve\u0107uje veliku pa\u017enju kvalitetu koda, stabilnom radu API-ja, testiranju i automatskim proverama. Isporu\u010duje se alat za proveru integriteta strukture baze podataka sa nekim mogu\u0107nostima obnavljanja. Tehnolo\u0161ki, libmdbx nudi ACID, strogu serijalizaciju promena i neblokiraju\u0107e \u010ditanje s linearnim skaliranjem po CPU jezgrama. Podr\u017eava automatsku kompaktifikaciju, automatsko upravljanje veli\u010dinom baze podataka, procenu obima uzoraka po opsegu (range query estimation).        <\/p>\n<p>Glavne spremembe:  <\/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 kursora s primernijim 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 ponovnog kori\u0161\u0107enja radi smanjenja tro\u0161kova. Funkcije mdbx_cursor_scan() i mdbx_cursor_scan_from() za skeniranje tabela koriste\u0107i funkcionalni predikat i smanjenje povezanih tro\u0161kova.\n<li class=\"l\"> Prepravka kursora za ujedna\u010davanje pona\u0161anja, redovniji kod, smanjenje broja grananja i ma\u0161inskih operacija.\n<li class=\"l\"> Prenos funkcionalnosti 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 potro\u0161enog na pronala\u017eenje sekvenci susednih slobodnih stranica u GC.\n<li class=\"l\"> Znatno zmanj\u0161anje stro\u0161kov zagonov transakcij v scenarijih z velikim \u0161tevilom DBI-hendov, zahvaljujo\u010d zakasnjenemu\/leni za\u010detku elementov pomo\u017enih tabel. Vklju\u010dno z mehanizmom podpore red\u010denih nizov DBI-hendov, upravljanim z mo\u017enostjo gradnje MDBX_ENABLE_DBI_SPARSE, ki je privzeto omogo\u010dena.\n<li class=\"l\"> Zmanj\u0161anje stro\u0161kov za odpiranje DBI-hendov. Vklju\u010dno z mehanizmom zakasnjenega spro\u0161\u010danja in podpore hitre poti odpiranja brez uporabe zaklepanja, upravljanim z mo\u017enostjo gradnje MDBX_ENABLE_DBI_LOCKFREE, ki je privzeto omogo\u010dena.\n<li class=\"l\"> Podpora \"parkiranja\" transakcij za branje z izpu\u0161\u010danjem za obdelavo starih MVCC-posnetkov in prepre\u010devanje te\u017eav, ki jih povzro\u010da ustavljanje obdelave smeti. Mehanizem parkiranja in izpu\u0161\u010danja parkiranih transakcij je tako dodatek kot tudi preprostej\u0161a alternativa povratnemu klicu Handle-Slow-Readers. Za udobje imajo funkcije mdbx_txn_park() in mdbx_txn_unpark() dodatne argumente, ki omogo\u010dajo zahtevo po samodejnem \"odparkiranju\" parkiranih in ponovnem zagonu izpu\u0161\u010denih transakcij. Uporabljen je ustrezen mo\u017enosti -d in -p v orodju mdbx_copy.\n<li class=\"l\"> Podpora za obnavljanje odprte okolja dela z Bazo podatkov v podrejenem procesu po razcepu\/pospe\u0161enju procesa preko mdbx_env_resurrect_after_fork().\n<li class=\"l\"> Podpora za preimenovanje tabel preko mdbx_dbi_rename() in mdbx_dbi_rename2(). Dodana funkcija mdbx_enumerate_tables() za pridobivanje informacij o poimenovanih uporabni\u0161kih tabelah.\n<li class=\"l\">  Na\u010din delovanja MDBX_NOSTICKYTHREADS namesto MDBX_NOTLS za poenostavitev integracije z lahkimi nitmi\/multiplexiranje z osrednjimi transakcijami operacijskega sistema.\n<li class=\"l\"> Za identifikacijo baze podatkov je bil dodan UUID, ki je dostopen na polju mi_dxbid strukture MDBX_envinfo, pridobljenega preko mdbx_env_info_ex(). Uresni\u010dena je bila pridobitev informacij o bazi podatkov brez njene odprtosti preko mdbx_preopen_snapinfo().\n<li class=\"l\"> Podpora za funkcije dnevnikovanja povratnih klicev brez funkcionalnosti vprintf(), kar znatno poenostavi uporabo dnevnikovanja v povezavah z drugimi programskimi jeziki.\n<li class=\"l\">  Dodajanje funkcij v API mdbx_txn_copy2pathname() in mdbx_txn_copy2fd().\n<li class=\"l\"> Restrukturiranje izvorne kode z refaktorizacijo.\n<li class=\"l\"> Uporaba izraza \"tabela\" namesto \"subDb\".\n<li class=\"l\"> Opozorilo na zastarele mo\u017enosti MDBX_COALESCE in MDBX_NOTLS. Zamenjava gradbenih mo\u017enosti MDBX_USE_VALGRIND z obi\u010dajno 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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