{"id":95653,"date":"2020-10-01T13:42:30","date_gmt":"2020-10-01T11:42:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-kompaktnoj-vstraivaemoj-subd-libmdbx-0-9-1"},"modified":"2020-10-01T13:42:30","modified_gmt":"2020-10-01T11:42:30","slug":"vypusk-kompaktnoj-vstraivaemoj-subd-libmdbx-0-9-1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-kompaktnoj-vstraivaemoj-subd-libmdbx-0-9-1","title":{"rendered":"Rilascio del database embedded compatto libmdbx 0.9.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx\/releases\">Rilasciata<\/a><\/noindex> versione 0.9.1 della libreria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx\">libmdbx<\/a><\/noindex> (MDBX) con un'implementazione di un database incorporato ad alte prestazioni e compatto di tipo chiave-valore. Il codice libmdbx \u00e8 distribuito con la licenza <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx\/blob\/master\/LICENSE\">Licenza Pubblica OpenLDAP<\/a><\/noindex>.<\/p>\n<p>La versione corrente \u00e8 un compromesso tra l'intenzione di rilasciare una versione stabile a lungo termine 1.0 con supporto completo per C++ e il desiderio di non ritardare i rilasci a causa della mancata prontezza per il congelamento del nuovo API C++. Il rilascio presentato \u00e8 il risultato di 9 mesi di lavoro volto alla stabilizzazione della libreria e al miglioramento della sua facilit\u00e0 d'uso, e include una versione preliminare <noindex><a rel=\"nofollow\" href=\"https:\/\/erthink.github.io\/libmdbx\/mdbx_8h_09_09.html\">API C++<\/a><\/noindex>. <\/p>\n<p>\u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 libmdbx \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0435 \u043f\u0440\u043e\u0441\u0442\u043e &#171;\u0444\u043e\u0440\u043a\u043e\u043c&#187;, \u0430 \u043a\u0430\u0440\u0434\u0438\u043d\u0430\u043b\u044c\u043d\u043e \u043f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u0442\u043e\u043c\u043a\u043e\u043c <noindex><a rel=\"nofollow\" href=\"https:\/\/symas.com\/lmdb\/\">LMDB<\/a><\/noindex> &#8212; \u0442\u0440\u0430\u043d\u0437\u0430\u043a\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0421\u0423\u0411\u0414 \u043a\u043b\u0430\u0441\u0441\u0430 &#171;\u043a\u043b\u044e\u0447-\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435&#187; \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/B%E2%81%BA-%D0%B4%D0%B5%D1%80%D0%B5%D0%B2%D0%BE\">albero B+<\/a><\/noindex> di <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A3%D0%BF%D1%80%D0%B5%D0%B6%D0%B4%D0%B0%D1%8E%D1%89%D0%B0%D1%8F_%D0%B6%D1%83%D1%80%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D1%8F\">journaling predittivo<\/a><\/noindex>, che consente a processi concorrenti e multi-thread di lavorare in modo efficiente con un DB locale condiviso (non in rete) senza un processo server dedicato. Libmdbx \u00e8 fondamentalmente <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx#improvements-beyond-lmdb\">si espande<\/a><\/noindex> le funzionalit\u00e0 del suo predecessore, eliminando o attenuando i difetti. Gli sviluppatori ritengono che libmdbx sia leggermente pi\u00f9 veloce e decisamente pi\u00f9 affidabile di LMDB.<\/p>\n<p>libmdbx offre <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/ACID\">ACID<\/a><\/noindex>, una rigorosa serializzazione delle modifiche e lettura non bloccante con scalabilit\u00e0 lineare sui core della CPU. I risultati dei test di performance (invio di richieste parallele per lettura\/ricerca in 1-2-4-8 thread su CPU i7-4600U con 2 core fisici in modalit\u00e0 4-thread HyperThread):<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/wiki\/erthink\/libmdbx\/img\/perf-slide-2.png\"><img decoding=\"async\" alt=\"Rilascio del database embedded compatto libmdbx 0.9.1\" src=\"\/wp-content\/uploads\/2020\/10\/ed2aaa014641ef00f52ce87b0119ece0.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Le principali differenze di MDBX rispetto a LMDB:<\/p>\n<ul>\n<li class=\"l\">  \u041f\u0440\u0438\u043d\u0446\u0438\u043f\u0438\u0430\u043b\u044c\u043d\u043e \u0431\u043e\u043b\u044c\u0448\u0435 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0443\u0434\u0435\u043b\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0443 \u043a\u043e\u0434\u0430, &#171;\u043d\u0435\u043f\u0430\u0434\u0443\u0447\u0435\u0441\u0442\u0438&#187; API, \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044e \u0438 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430\u043c.\n<li class=\"l\">  Controllo significativamente maggiore durante l'esecuzione, dalla verifica dei parametri, fino all'audit interno delle strutture del database.\n<li class=\"l\">  Auto-compattamento e gestione automatica della dimensione del DB.\n<li class=\"l\">  Formato unificato del DB per le versioni a 32 e 64 bit.\n<li class=\"l\">  Valutazione del volume delle selezioni per intervallo (range query estimation).\n<li class=\"l\">  Supporto per chiavi di lunghezza doppia e dimensione della pagina del DB selezionabile dall'utente.\n<li class=\"l\">  Utilit\u00e0 di verifica dell'integrit\u00e0 della struttura del DB con alcune funzionalit\u00e0 di recupero.\n<\/ul>\n<p>Novit\u00e0 principali e aggiornamenti dopo <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52147\">l'ultima notizia<\/a><\/noindex> con il rilascio della versione 0.5 a gennaio 2020:<\/p>\n<ul>\n<li class=\"l\">  Per supporto tempestivo e risposte a domande \u00e8 stato creato un gruppo aperto <noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/libmdbx\">su Telegram<\/a><\/noindex>.\n<li class=\"l\">  Eliminate oltre una decina di bug e imprecisioni (vedi <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx\/blob\/master\/ChangeLog.md\">registro delle modifiche<\/a><\/noindex>).\n<li class=\"l\">  Corrette molteplici errori di battitura e ortografici, numerosi miglioramenti estetici.\n<li class=\"l\">  Espansi gli scenari di test.\n<li class=\"l\">  Implementato il supporto per iOS, Android, <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Buildroot\">buildroot<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Musl\">Musl<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/UClibc\">uClibc<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Windows_Subsystem_for_Linux\">WSL1<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Wine\">Wine<\/a><\/noindex>.\n<li class=\"l\">  Introdotta una versione preliminare dell'API C++ in <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/erthink\/libmdbx\/blob\/master\/mdbx.h%2B%2B\">un file di intestazione<\/a><\/noindex>.\n<li class=\"l\">  Preparata la documentazione incorporata in formato Doxygen e generazione automatica <noindex><a rel=\"nofollow\" href=\"https:\/\/erthink.github.io\/libmdbx\/\">Documentazione online<\/a><\/noindex>.\n<li class=\"l\">  Garantita la creazione automatica di archivi con i testi sorgente amalgamati.\n<li class=\"l\">  Aggiunto supporto per la preparazione di transazioni e cursori, contesti personalizzati per transazioni e cursori.\n<li class=\"l\">  Implementati metodi aggiuntivi per il controllo dell'integrit\u00e0 referenziale nelle istantanee MVCC B+tree.\n<li class=\"l\">  Aggiunto supporto per la verifica dell'istantanea MVCC del DB, accessibile tramite qualsiasi pagina meta con possibilit\u00e0 di commutazione per il ripristino.\n<li class=\"l\">  Implementato supporto per la riapertura del DB da un processo per scopi di test e simili.\n<li class=\"l\">  \u00c8 stata implementata la gestione automatica dell'opzione MDBX_NOSUBDIR durante l'apertura del database.\n<li class=\"l\">  \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 \u0438\u0437 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u0438 \u0438 &#171;\u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0445&#187; \u0447\u0438\u0441\u0435\u043b JavaScript.\n<li class=\"l\">  Sono state apportate in totale 430 modifiche che hanno interessato 93 file, aggiungendo oltre 25.000 righe e rimuovendo pi\u00f9 di 8.500 righe.\n<\/ul>\n<p>Lo sviluppo successivo di libmdbx si concentrer\u00e0 sulla definizione dell'API finale in C++, sulla stabilizzazione del codice base, sul miglioramento dell'usabilit\u00e0 della libreria e sulla creazione di pacchetti per le distribuzioni Linux pi\u00f9 popolari. Tra le modifiche previste, vale la pena notare il supporto per le chiavi in formato <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/MessagePack\">MessagePack<\/a><\/noindex>.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53812\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u044b\u043f\u0443\u0449\u0435\u043d\u0430 \u0432\u0435\u0440\u0441\u0438\u044f 0.9.1 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libmdbx (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 OpenLDAP Public License. \u0422\u0435\u043a\u0443\u0449\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0438\u0441\u0441\u043e\u043c \u043c\u0435\u0436\u0434\u0443 \u043d\u0430\u043c\u0435\u0440\u0435\u043d\u0438\u0435\u043c \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u0434\u043e\u043b\u0433\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u0443\u044e \u0432\u0435\u0440\u0441\u0438\u044e 1.0 \u0441 \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 C++ \u0438 \u043d\u0435\u0436\u0435\u043b\u0430\u043d\u0438\u0435\u043c \u043e\u0442\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0442\u044c \u0440\u0435\u043b\u0438\u0437\u044b \u0438\u0437-\u0437\u0430 \u043d\u0435\u0433\u043e\u0442\u043e\u0432\u043d\u043e\u0441\u0442\u0438 \u043a \u0437\u0430\u043c\u043e\u0440\u043e\u0437\u043a\u0435 \u043d\u043e\u0432\u043e\u0433\u043e C++ API. \u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u043c 9 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":95654,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-95653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u044b\u043f\u0443\u0449\u0435\u043d\u0430 \u0432\u0435\u0440\u0441\u0438\u044f 0.9.1 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 libmdbx (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 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