{"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\/hu\/blog\/news\/sistema-szhatiya-openzl-operezhayushhaya-zstd-i-xz-po-skorosti-i-urovnyu-szhatiya-strukturirovannyh-dannyh","title":{"rendered":"Az OpenZL t\u00f6m\u00f6r\u00edt\u00e9si rendszer gyorsas\u00e1gban \u00e9s t\u00f6m\u00f6r\u00edt\u00e9si szintben megel\u0151zi a Zstd-t \u00e9s az XZ-t a struktur\u00e1lt adatok eset\u00e9ben.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Meta* bemutatta az OpenZL adatkompressz\u00e1l\u00f3 \u00e9s -dekompressz\u00e1l\u00f3 eszk\u00f6z\u00e9t, amely a Zstd \u00e9s az XZ form\u00e1tumokhoz k\u00e9pest magasabb t\u00f6m\u00f6r\u00edt\u00e9si szintet \u00e9s teljes\u00edtm\u00e9nyt mutat. Az OpenZL c\u00e9lja, hogy hat\u00e9konyan t\u00f6m\u00f6r\u00edtse a struktur\u00e1lt adat\u00e1llom\u00e1nyokat, p\u00e9ld\u00e1ul a g\u00e9pi tanul\u00e1s sor\u00e1n haszn\u00e1ltakat, valamint azokat a t\u00e1rol\u00f3kat, amelyek k\u00fcl\u00f6nb\u00f6z\u0151 ism\u00e9tl\u0151d\u0151 inform\u00e1ci\u00f3t\u00edpusokat tartalmaznak. Az OpenZL k\u00f3dja C\/C++ nyelven \u00edr\u00f3dott \u00e9s BSD licenc alatt el\u00e9rhet\u0151. <\/p>\n

Az OpenZL eszk\u00f6ze lehet\u0151v\u00e9 tette a SAO csillag\u00e1szati katal\u00f3gus adatb\u00e1zis\u00e1nak 2,06-szoros t\u00f6m\u00f6r\u00edt\u00e9s\u00e9t, m\u00edg a zstd algoritmus 1,31-szer, az XZ pedig 1,64-szer cs\u00f6kkentette az inform\u00e1ci\u00f3 m\u00e9ret\u00e9t. A t\u00f6m\u00f6r\u00edt\u00e9si sebess\u00e9g ter\u00e9n az OpenZL k\u00e9tszer gyorsabb volt a zstd-hez k\u00e9pest (203 MB\/s a 115 MB\/s-hoz), \u00e9s 65-sz\u00f6r gyorsabb az XZ-hez k\u00e9pest (203 MB\/s a 3,1 MB\/s-hoz). Az OpenZL kicsomagol\u00e1sa kiss\u00e9 lassabb volt, mint a zstd (822 MB\/s a 890 MB\/s-hoz), de 27-szer gyorsabb volt, mint az XZ.

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

Az OpenZL nem \u00e1ltal\u00e1nos c\u00e9l\u00fa algoritmus, \u00e9s csak el\u0151re ismert adatstrukt\u00far\u00e1k eset\u00e9n mutat j\u00f3 teljes\u00edtm\u00e9nyt. Az OpenZL m\u0171k\u00f6d\u00e9se a megadott adatle\u00edr\u00e1s alapj\u00e1n k\u00e9sz\u00edtett adapt\u00edv t\u00f6m\u00f6r\u00edt\u0151 gener\u00e1l\u00e1s\u00e1ra korl\u00e1toz\u00f3dik. Ennek eredm\u00e9nyek\u00e9nt a bont\u00e1sra sz\u00e1nt k\u00f3dot a konkr\u00e9t adatform\u00e1tumhoz optimaliz\u00e1lj\u00e1k. A dekompressz\u00e1l\u00e1shoz egy univerz\u00e1lis dekompresszor haszn\u00e1latos, amely kompatibilis az \u00f6sszes gener\u00e1lt t\u00f6m\u00f6r\u00edt\u0151vel. <\/p>\n

A csomagol\u00e1s \u00e9s kicsomagol\u00e1s egyetlen eszk\u00f6z, a \u201ezli\u201d vagy a libopenzl k\u00f6nyvt\u00e1r seg\u00edts\u00e9g\u00e9vel t\u00f6rt\u00e9nik. Az adatok strukt\u00far\u00e1ja profilok form\u00e1j\u00e1ban van le\u00edrva. M\u00e1r tartalmaz egy el\u0151re defini\u00e1lt profilok k\u00e9szlet\u00e9t, amelyek a tipikus t\u00e1rol\u00e1si form\u00e1tumokat \u00edrj\u00e1k le. P\u00e9ld\u00e1ul van profil a CSV form\u00e1tumhoz vagy a 64-bites sz\u00e1mok t\u00f6mbj\u00e9ben t\u00e1rolt adatokhoz. A t\u00f6m\u00f6r\u00edt\u00e9s a \u201ezli list-profiles\u201d parancs seg\u00edts\u00e9g\u00e9vel a profil kiv\u00e1laszt\u00e1s\u00e1val, majd pedig a \u201ezli compress \u2014profile profil_neve\u201d parancs v\u00e9grehajt\u00e1s\u00e1val t\u00f6rt\u00e9nik. A kicsomagol\u00e1shoz elegend\u0151 elind\u00edtani a \u201ezli decompress\u201d parancsot. <\/p>\n

Specifikus form\u00e1tumok eset\u00e9n sz\u00fcks\u00e9g van saj\u00e1t profil l\u00e9trehoz\u00e1s\u00e1ra a \u201ezli train\u201d parancs haszn\u00e1lat\u00e1val, amely kider\u00edti az adatokban l\u00e9v\u0151 mint\u00e1kat \u00e9s egy optim\u00e1lis t\u00f6m\u00f6r\u00edt\u00e9si szinttel rendelkez\u0151 profilt hoz l\u00e9tre. A \u201e\u2014pareto-frontier\u201d opci\u00f3val a l\u00e9trehozott profil fejleszthet\u0151 a csomagol\u00e1s vagy kicsomagol\u00e1s gyors\u00edt\u00e1sa \u00e9rdek\u00e9ben, cser\u00e9be a t\u00f6m\u00f6r\u00edt\u00e9si szint cs\u00f6kken\u00e9s\u00e9vel. Bonyolult form\u00e1tumokkal \u00e9s be\u00e1gyazott strukt\u00far\u00e1kkal kapcsolatos specifik\u00e1ci\u00f3khoz, valamint adatform\u00e1tumok elrendez\u00e9s\u00e9nek meghat\u00e1roz\u00e1s\u00e1hoz az SDDL (Simple Data Description Language) nyelv alkalmazhat\u00f3. <\/p>\n

Az optim\u00e1lis t\u00f6m\u00f6r\u00edt\u0151k l\u00e9trehoz\u00e1s\u00e1nak m\u00f3dszere egy primit\u00edv k\u00f3dol\u00f3kb\u00f3l \u00e1ll\u00f3 k\u00e9szlet alkalmaz\u00e1s\u00e1n alapul, amelyek mindegyike a legjobban megfelel a k\u00fcl\u00f6nb\u00f6z\u0151 adatok t\u00edpusainak \u00e9s sorrendj\u00e9nek. A t\u00f6m\u00f6r\u00edt\u00e9shez egy ir\u00e1ny\u00edtott aciklikus grafot alkotunk az adatok feldolgoz\u00e1s\u00e1hoz, amelynek csom\u00f3pontjai a kodekek, \u00e9ljei pedig az feldolgozott form\u00e1tumban l\u00e9v\u0151 adatok vari\u00e1nsai. A be\u00e9rkez\u0151 adatok t\u00edpus\u00e1nak f\u00fcggv\u00e9ny\u00e9ben a kodekek optim\u00e1lis l\u00e1ncolata ker\u00fcl kiv\u00e1laszt\u00e1sra, amelyek t\u00f6m\u00f6r\u00edtik az adott adatot. Ezzel a szervez\u00e9ssel a f\u00e1jl fejl\u00e9c\u00e9t egy kodek t\u00f6m\u00f6r\u00edti, az eg\u00e9sz sz\u00e1m\u0171 adattartalm\u00e1t egy m\u00e1sik, a n\u00f6vekv\u0151 sz\u00e1ml\u00e1l\u00f3 mez\u0151j\u00e9t egy harmadik, m\u00edg a karakterl\u00e1nc adatmez\u0151j\u00e9t egy negyedik k\u00f3dol\u00f3 t\u00f6m\u00f6r\u00edti.

\"Az<\/center>
\n
Forr\u00e1s: 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\udd47 Az OpenZL t\u00f6m\u00f6r\u00edt\u00e9si rendszer, amely a struktur\u00e1lt adatok t\u00f6m\u00f6r\u00edt\u00e9s\u00e9ben gyorsas\u00e1gban \u00e9s t\u00f6m\u00f6r\u00edt\u00e9si szinten is 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