{"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\/pt\/blog\/news\/sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh","title":{"rendered":"O sistema de compress\u00e3o OpenZL supera Zstd e XZ em velocidade e n\u00edvel de compress\u00e3o de dados estruturados.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A empresa Meta* apresentou a ferramenta de compress\u00e3o e descompress\u00e3o de dados OpenZL, que, em compara\u00e7\u00e3o com os formatos Zstd e XZ, demonstra um n\u00edvel de compress\u00e3o e velocidade de opera\u00e7\u00e3o superiores. O OpenZL foi projetado para compress\u00e3o eficiente de conjuntos de dados estruturados, como aqueles utilizados em aprendizado de m\u00e1quina, bem como de armazenamentos que cont\u00eam campos com diferentes tipos de informa\u00e7\u00f5es repetitivas. O c\u00f3digo do OpenZL \u00e9 escrito em C\/C++ e \u00e9 aberto sob a licen\u00e7a BSD. <\/p>\n

Ao comprimir um banco de dados com o cat\u00e1logo astron\u00f4mico de estrelas SAO, a ferramenta OpenZL conseguiu reduzir o tamanho dos dados em 2,06 vezes, enquanto o algoritmo zstd comprimiu as informa\u00e7\u00f5es em 1,31 vezes e o XZ em 1,64 vezes. Em termos de velocidade de compress\u00e3o, o OpenZL superou o zstd por duas vezes (203 MB\/s contra 115 MB\/s) e o XZ por 65 vezes (203 MB\/s contra 3,1 MB\/s). A descompress\u00e3o no OpenZL foi ligeiramente mais lenta que no zstd (822 MB\/s contra 890 MB\/s) e 27 vezes mais r\u00e1pida que no XZ.

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

O OpenZL n\u00e3o \u00e9 um algoritmo de prop\u00f3sito geral e apresenta bons resultados apenas para dados com uma estrutura conhecida previamente. O funcionamento do OpenZL consiste na gera\u00e7\u00e3o adaptativa de um empacotador com base na descri\u00e7\u00e3o dos dados fornecida. Como resultado, forma-se um c\u00f3digo de compress\u00e3o otimizado para o formato de dados espec\u00edfico. Para descompress\u00e3o, utiliza-se um descompressor universal, compat\u00edvel com todos os empacotadores gerados. <\/p>\n

A compress\u00e3o e descompress\u00e3o s\u00e3o realizadas por meio de uma \u00fanica ferramenta chamada \"zli\" ou pela biblioteca libopenzl. A estrutura de dados \u00e9 descrita na forma de perfis. J\u00e1 existe um conjunto de perfis predefinidos que descrevem formatos de armazenamento t\u00edpicos. Por exemplo, um perfil para o formato CSV ou dados armazenados na forma de um array de n\u00fameros de 64 bits. Para a compress\u00e3o, basta selecionar um perfil com o comando \"zli list-profiles\" e iniciar o processo de compress\u00e3o com o comando \"zli compress --profile nome_perfil\". Para descompress\u00e3o, \u00e9 suficiente iniciar \"zli decompress\". <\/p>\n

Para formatos espec\u00edficos, \u00e9 necess\u00e1rio criar um perfil pr\u00f3prio, usando o comando \"zli train\", que identifica padr\u00f5es nos dados e cria um perfil com o n\u00edvel de compress\u00e3o mais otimizado. Usando a op\u00e7\u00e3o \"--pareto-frontier\", o perfil criado pode ser aprimorado para acelerar a compress\u00e3o ou descompress\u00e3o, em troca de uma redu\u00e7\u00e3o no n\u00edvel de compress\u00e3o. Para descrever formatos complexos com estruturas aninhadas e definir o layout dos formatos de dados nas estruturas, pode ser utilizada a linguagem SDDL (Simple Data Description Language). <\/p>\n

O m\u00e9todo de cria\u00e7\u00e3o de compactadores otimizados \u00e9 baseado na aplica\u00e7\u00e3o de um conjunto de codificadores primitivos, cada um dos quais \u00e9 mais eficiente para tipos e sequ\u00eancias espec\u00edficas de dados. Para compress\u00e3o, forma-se um gr\u00e1fico ac\u00edclico orientado de processamento de dados, cujos n\u00f3s s\u00e3o codecs e as arestas s\u00e3o variantes de dados no formato processado. Dependendo do tipo de dados recebido, escolhe-se uma cadeia de codecs que comprimem de forma otimizada o elemento de dados recebido. Com essa organiza\u00e7\u00e3o, o cabe\u00e7alho do arquivo \u00e9 comprimido por um codec, o campo com dados inteiros por um segundo, o campo com um contador crescente por um terceiro, e o campo com dados de texto por um quarto.

\"O<\/center>
\n
Fonte: opennet.ru<\/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\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\udd47Sistema de compress\u00e3o OpenZL, superando Zstd e XZ em velocidade e n\u00edvel de compress\u00e3o de dados estruturados | ProHoster","description":"A empresa Meta* apresentou a ferramenta de 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