{"id":55405,"date":"2020-01-19T00:00:00","date_gmt":"2020-01-18T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/pervyj-reliz-wzd-1-0-0-servera-kompaktnogo-hraneniya-melkih-fajlov"},"modified":"2020-02-18T14:03:30","modified_gmt":"2020-02-18T11:03:30","slug":"pervyj-reliz-wzd-1-0-0-servera-kompaktnogo-hraneniya-melkih-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/pervyj-reliz-wzd-1-0-0-servera-kompaktnogo-hraneniya-melkih-fajlov","title":{"rendered":"Prima versione wZD 1.0.0, server di archiviazione compatto per piccoli file","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/wzd\/releases\/tag\/v1.0.0\">Disponibile<\/a><\/noindex> il primo rilascio <noindex><a rel=\"nofollow\" href=\"https:\/\/wzd.dev\/\">wZD 1.0.0<\/a><\/noindex> \u2014 server per l'archiviazione efficace di un grande numero di file in modo compatto, che appare all'esterno come un normale server WebDAV. Per l'archiviazione viene utilizzata una versione modificata <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/bolt\">BoltDB<\/a><\/noindex>. Il codice del progetto \u00e8 scritto in linguaggio Go e <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/wzd\/\">distribuito<\/a><\/noindex> con licenza BSD.<\/p>\n<p>Server <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/wzd\/blob\/master\/README-RUS.md\">permette<\/a><\/noindex> consente di ridurre significativamente il numero di piccoli file su normali o cluster file system con supporto completo per i lock. Il cluster supportato da wZD memorizza circa 250 milioni di piccoli file distribuiti su 15 milioni di directory in un filesystem cluster. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/moosefs\/moosefs\">MooseFS<\/a><\/noindex>.<\/p>\n<p>wZD offre la possibilit\u00e0 di spostare (archiviare) il contenuto delle directory in archivi nel formato BoltDB e poi distribuire questi file da questi archivi (o inserire file negli archivi tramite il metodo PUT), riducendo notevolmente il numero di file nel filesystem e abbattendo i costi di memorizzazione dei metadata. Per migliorare l'efficienza nel trattamento di grandi file, tali file possono essere memorizzati separatamente dagli archivi Bolt. Questo approccio consente di gestire un numero enorme di piccoli file senza incontrare il limite di inode nel file system. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/eltaline\/wzd\/master\/images\/wzd-arch.png\"><img decoding=\"async\" alt=\"Prima versione wZD 1.0.0, server di archiviazione compatto per piccoli file\" src=\"\/wp-content\/uploads\/2020\/01\/3a9804bd6cd8e4a5f8033c8a19d7cc37.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Il server pu\u00f2 essere utilizzato anche come database NoSQL per dati in formato chiave\/valore (con sharding basato sulla struttura delle directory) o per distribuire da un database documenti html o json pre-generati. Per quanto riguarda le prestazioni, il recupero e la scrittura di dati utilizzando archivi Bolt comportano un aumento della latenza di circa il 20-25% nella lettura e del 40-50% nella scrittura. Pi\u00f9 piccolo \u00e8 il file, minori sono le differenze nella latenza.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/eltaline\/wzd\/master\/images\/get-put-32M.png\"><img decoding=\"async\" alt=\"Prima versione wZD 1.0.0, server di archiviazione compatto per piccoli file\" src=\"\/wp-content\/uploads\/2020\/01\/a76146504e18bfdf416f69d3022db5e4.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Principali <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/wzd\/blob\/master\/README-RUS.md\">della possibilit\u00e0<\/a><\/noindex>:<\/p>\n<ul>\n<li> Multithreading;\n<li> Multi-server per garantire ridondanza e bilanciamento del carico;\n<li> Massima trasparenza per l'utente o lo sviluppatore;\n<li> Metodi HTTP supportati: GET, HEAD, PUT e DELETE;\n<li> Gestione del comportamento di lettura e scrittura tramite intestazioni client;\n<li> Supporto per host virtuali configurabili in modo flessibile;\n<li> Supporto per l'integrit\u00e0 dei dati CRC durante la scrittura\/lettura;\n<li> Buffer semi-dinamici per un consumo minimo di memoria e un'ottimizzazione delle prestazioni di rete;\n<li> Imballaggio dei dati ritardato;\n<li> In aggiunta, \u00e8 offerta un'archiviazione multithread; <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/eltaline\/wza\/blob\/master\/README-RUS.md\">wZA<\/a><\/noindex> per spostare file negli archivi Bolt senza interrompere il servizio.\n<\/ul>\n<p>Alcune limitazioni della versione attuale: nessun supporto per Multipart, metodo POST, protocollo HTTPS, binding per linguaggi di programmazione, eliminazione ricorsiva delle directory, assenza di supporto per il montaggio della struttura nel filesystem tramite WebDAV o FUSE, i file sono memorizzati sotto un unico utente di sistema. Il formato di memorizzazione \u00e8 legato all'architettura e non \u00e8 trasferibile tra sistemi Little Endian e Big Endian. Anche se il server wZD implementa il supporto per il protocollo HTTP, deve essere eseguito solo dietro un reverse proxy come nginx e haproxy.<\/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=52214\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a wZD 1.0.0 &#8212; \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0431\u043e\u043b\u044c\u0448\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u043c \u0432\u0438\u0434\u0435, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043d\u0430\u0440\u0443\u0436\u0438 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u043a\u0430\u043a \u043e\u0431\u044b\u0447\u043d\u044b\u0439 WebDAV-\u0441\u0435\u0440\u0432\u0435\u0440. \u0414\u043b\u044f \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043c\u043e\u0434\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f BoltDB. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Go \u0438 \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 BSD. \u0421\u0435\u0440\u0432\u0435\u0440 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0441\u043e\u043a\u0440\u0430\u0442\u0438\u0442\u044c \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0438\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u043d\u0430 \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u0438\u043b\u0438 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u043f\u043e\u043b\u043d\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 [&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-55405","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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