{"id":144566,"date":"2025-10-09T17:11:54","date_gmt":"2025-10-09T15:11:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh"},"modified":"2025-10-09T17:11:54","modified_gmt":"2025-10-09T15:11:56","slug":"sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh","title":{"rendered":"Sistemul de compresie OpenZL, care dep\u0103\u0219e\u0219te Zstd \u0219i XZ \u00een viteza \u0219i nivelul de comprimare a datelor structurate","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Compania Meta* a prezentat un instrument pentru comprimarea \u0219i decomprimarea datelor OpenZL, care, \u00een compara\u021bie cu formatele Zstd \u0219i XZ, demonstreaz\u0103 un nivel mai ridicat de compresie \u0219i o vitez\u0103 de operare mai bun\u0103. OpenZL a fost conceput pentru a comprima eficient seturi structurate de date, cum ar fi cele utilizate \u00een \u00eenv\u0103\u021barea automat\u0103, precum \u0219i depozite care con\u021bin c\u00e2mpuri cu diverse tipuri repetate de informa\u021bii. Codul OpenZL este scris \u00een C\/C++ \u0219i este open source sub licen\u021ba BSD. <\/p>\n

C\u00e2nd baza de date cu catalogul astronomic de stele SAO a fost comprimat\u0103, instrumentul OpenZL a reu\u0219it s\u0103 reduc\u0103 dimensiunea datelor de 2,06 ori, \u00een timp ce algoritmul zstd a comprimat informa\u021bia de 1,31 ori, iar XZ de 1,64 ori. \u00cen plus, la viteza de comprimare, OpenZL a dep\u0103\u0219it zstd de dou\u0103 ori (203 MB\/s fa\u021b\u0103 de 115 MB\/s), iar XZ de 65 de ori (203 MB\/s fa\u021b\u0103 de 3,1 MB\/s). Dezarhivarea cu OpenZL s-a dovedit a fi u\u0219or mai lent\u0103 dec\u00e2t zstd (822 MB\/s fa\u021b\u0103 de 890 MB\/s) \u0219i de 27 de ori mai rapid\u0103 dec\u00e2t XZ.

\"Sistemul<\/center> <\/p>\n

OpenZL nu este un algoritm de uz general \u0219i arat\u0103 rezultate bune doar pentru date cu o structur\u0103 cunoscut\u0103 dinainte. Func\u021bionarea OpenZL se reduce la generarea adaptiv\u0103 a unui compresor pe baza descrierii datelor transmise. Ca rezultat, se formeaz\u0103 un cod pentru comprimare, optimizat pentru un format specific de date. Pentru decomprimare se folose\u0219te un decompressor universal, compatibil cu toate compresoarele generate. <\/p>\n

Ambalarea \u0219i dezamabalarea se realizeaz\u0103 cu ajutorul unui singur utilitar \u201ezli\u201d sau a bibliotecii libopenzl. Structura datelor este descris\u0103 sub form\u0103 de profile. \u00cen componen\u021ba sa se afl\u0103 deja un set de profile predefinite care descriu formate standard de stocare. De exemplu, un profil pentru formatul CSV sau datele stocate sub form\u0103 de tablou de numere de 64 de bi\u021bi. Comprimarea se rezum\u0103 la alegerea unui profil cu comanda \u201ezli list-profiles\u201d \u0219i la ini\u021bierea procesului de ambalare cu comanda \u201ezli compress \u2014profile nume_profil\u201d. Pentru dezamabalare, este suficient s\u0103 rula\u021bi \u201ezli decompress\u201d. <\/p>\n

Pentru formate specifice, este necesar s\u0103 se creeze un profil propriu, folosind comanda \u201ezli train\u201d, care identific\u0103 tiparele din date \u0219i creeaz\u0103 un profil cu nivelul optim de comprimare. Folosind op\u021biunea \u201e\u2014pareto-frontier\u201d, profilul creat poate fi modernizat pentru a accelera ambalarea sau dezamabalarea, \u00een schimbul reducerii nivelului de comprimare. Pentru a descrie formate complexe cu structuri \u00eennodat\u0103 \u0219i pentru a determina aranjamentul formatelor de date \u00een structuri, se poate utiliza limbajul SDDL (Simple Data Description Language). <\/p>\n

Metoda de crearea compresoarelor optime se bazeaz\u0103 pe aplicarea unui set de codificatoare primitive, fiecare fiind cel mai eficient pentru tipuri \u0219i secven\u021be de date specifice. Pentru comprimare se formeaz\u0103 un graf orientat aciclic de procesare a datelor, nodurile acestuia fiind codecurile, iar muchiile reprezent\u00e2nd variantele de date \u00een formatul procesat. \u00cen func\u021bie de tipul de date primit la intrare, se alege o secven\u021b\u0103 de codecuri care comprim\u0103 optim elementul de date primit. \u00centr-o astfel de organizare, antetul fi\u0219ierului este comprimat cu un codec, c\u00e2mpul cu date \u00eentregi cu un altul, c\u00e2mpul cu un contor \u00een cre\u0219tere cu un al treilea, iar c\u00e2mpul cu date de tip \u0219ir de caractere cu un al patrulea.

\"Sistemul<\/center>
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Meta* \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u0434\u043b\u044f \u0441\u0436\u0430\u0442\u0438\u044f \u0438 \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 OpenZL, \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0444\u043e\u0440\u043c\u0430\u0442\u0430\u043c\u0438 Zstd \u0438 XZ \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0431\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u0441\u0436\u0430\u0442\u0438\u044f \u0438 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u044b. OpenZL \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0441\u0436\u0430\u0442\u0438\u044f \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430\u0431\u043e\u0440\u043e\u0432 \u0434\u0430\u043d\u043d\u044b\u0445, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0445 \u043f\u0440\u0438 \u043c\u0430\u0448\u0438\u043d\u043d\u043e\u043c \u043e\u0431\u0443\u0447\u0435\u043d\u0438\u0438, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0438\u0445 \u043f\u043e\u043b\u044f \u0441 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u043c\u0438 \u043f\u043e\u0432\u0442\u043e\u0440\u044f\u044e\u0449\u0438\u043c\u0438\u0441\u044f \u0442\u0438\u043f\u0430\u043c\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041a\u043e\u0434 OpenZL \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 C\/C++ \u0438 \u043e\u0442\u043a\u0440\u044b\u0442 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":144567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-144566","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Sistemul de comprimare OpenZL, dep\u0103\u0219ind Zstd \u0219i XZ \u00een ceea ce prive\u0219te viteza \u0219i nivelul de comprimare a datelor structurate | ProHoster","description":"Compania Meta* a prezentat un instrument pentru comprimarea \u0219i desf\u0103\u0219urarea datelor OpenZL, care, comparativ cu formatele Zstd \u0219i XZ, demonstreaz\u0103 un nivel mai mare de comprimare \u0219i o vitez\u0103 opera\u021bional\u0103 superioar\u0103.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0421\u0438\u0441\u0442\u0435\u043c\u0430 \u0441\u0436\u0430\u0442\u0438\u044f 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