{"id":112173,"date":"2023-12-13T03:10:13","date_gmt":"2023-12-13T01:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovana-platforma-sef-dlya-programmno-upravlyaemyh-flash-nakopitelej"},"modified":"2023-12-13T03:10:13","modified_gmt":"2023-12-13T01:10:13","slug":"opublikovana-platforma-sef-dlya-programmno-upravlyaemyh-flash-nakopitelej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/opublikovana-platforma-sef-dlya-programmno-upravlyaemyh-flash-nakopitelej","title":{"rendered":"Byla zve\u0159ejn\u011bna platforma SEF pro programov\u011b \u0159\u00edzen\u00e9 Flash disky.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Organizace Linux Foundation p\u0159edstavila prvn\u00ed vyd\u00e1n\u00ed otev\u0159en\u00e9 platformy pro programov\u011b \u0159\u00edzen\u00e9 Flash pam\u011bti SEF (Software Enabled Flash), vyvinut\u00e9 na z\u00e1klad\u011b k\u00f3du poskytnut\u00e9ho spole\u010dnost\u00ed KIOXIA (d\u0159\u00edve Toshiba Memory Corporation), kde byla v roce 1980 vynalezena Flash pam\u011b\u0165. Zdrojov\u00e9 k\u00f3dy n\u00e1stroj\u016f jsou naps\u00e1ny v jazyce C a distribuov\u00e1ny pod licenc\u00ed BSD. <\/p>\n

N\u00e1stroj zahrnuje sadu patch\u016f pro Linuxov\u00e9 j\u00e1dro, blokov\u00fd ovlada\u010d pro za\u0159\u00edzen\u00ed SEF (Software Enabled Flash), p\u0159\u00edkazov\u00e9 \u0159\u00e1dkov\u00e9 utility pro spr\u00e1vu, paravirtualizovan\u00e9 SEF ovlada\u010de pro QEMU, knihovnu s API pro v\u00fdvoj aplikac\u00ed, patche pro nvme-cli a FIO, kter\u00e9 p\u0159id\u00e1vaj\u00ed podporu SEF. SDK tak\u00e9 obsahuje referen\u010dn\u00ed implementaci programov\u00e9 \u00farovn\u011b FTL (Flash Translation Layer), kter\u00e1 zaji\u0161\u0165uje p\u0159ekl\u00e1d\u00e1n\u00ed p\u0159\u00edkaz\u016f blokov\u00fdch za\u0159\u00edzen\u00ed do p\u0159\u00edstup\u016f k skute\u010dn\u00e9mu Flash pam\u011b\u0165ov\u00e9mu \u010dipu, shroma\u017e\u010fov\u00e1n\u00ed dat a rozd\u011blov\u00e1n\u00ed dat mezi pam\u011b\u0165ov\u00fdmi bu\u0148kami. FTL implementuje podporu flexibiln\u00edho um\u00edst\u011bn\u00ed dat (FDP \u2014 Flexible Data Placement), z\u00f3nov\u00e1n\u00ed (ZNS \u2014 Zoned Namespace) a specifikaci NVMe. <\/p>\n

U b\u011b\u017en\u00fdch Flash disk\u016f pro extern\u00ed syst\u00e9my p\u0159edstavuje \u00falo\u017ei\u0161t\u011b \u010dernou sk\u0159\u00ed\u0148ku, kde je \u010d\u00e1st pam\u011bti rezervov\u00e1na pro servisn\u00ed operace, v\u00fdkonnostn\u00ed ukazatele jsou nest\u00e1l\u00e9 a objevuj\u00ed se nep\u0159edv\u00eddateln\u00e9 zpo\u017ed\u011bn\u00ed zp\u016fsoben\u00e1 vnit\u0159n\u00ed \u010dinnost\u00ed \u0159adi\u010de, nap\u0159\u00edklad b\u011bhem spr\u00e1vy pam\u011bti. Na rozd\u00edl od tradi\u010dn\u00edch Flash disk\u016f, kde p\u0159eprogramov\u00e1n\u00ed dat, izolace vadn\u00fdch blok\u016f a spr\u00e1va pam\u011bti b\u00fdv\u00e1 \u0159\u00edzena firmwarem \u0159adi\u010de, \u00falo\u017ei\u0161t\u011b s podporou SEF umo\u017e\u0148uj\u00ed p\u0159esunout logiku n\u00edzko\u00farov\u0148ov\u00e9 pr\u00e1ce s \u010dipem Flash pam\u011bti na stranu softwaru a opera\u010dn\u00edho syst\u00e9mu. <\/p>\n

SEF umo\u017e\u0148uje p\u0159\u00edm\u00e9 \u0159\u00edzen\u00ed fyzick\u00e9ho um\u00edst\u011bn\u00ed dat, m\u011bn\u011bn\u00ed algoritm\u016f rozd\u011blov\u00e1n\u00ed z\u00e1t\u011b\u017ee, spr\u00e1vu priorit a QoS, odstran\u011bn\u00ed dal\u0161\u00ed vrstvy p\u0159ekladu blok\u016f, vyu\u017eit\u00ed cel\u00e9 dostupn\u00e9 pam\u011bti, zaji\u0161t\u011bn\u00ed p\u0159edv\u00eddateln\u00e9ho chov\u00e1n\u00ed s \u00falo\u017ei\u0161t\u011bm a rozd\u011blen\u00ed \u00falo\u017ei\u0161t\u011b na virtu\u00e1ln\u00ed za\u0159\u00edzen\u00ed, kter\u00e1 jsou izolov\u00e1na na \u00farovni vstupu\/v\u00fdstupu a maj\u00ed r\u016fznou prioritu ve zpracov\u00e1n\u00ed. Navr\u017een\u00fd p\u0159\u00edstup SEF umo\u017e\u0148uje sn\u00ed\u017eit re\u017eijn\u00ed n\u00e1klady a zv\u00fd\u0161it efektivitu interakce s \u00falo\u017ei\u0161t\u011bm d\u00edky p\u0159izp\u016fsoben\u00ed aktu\u00e1ln\u00edm pot\u0159eb\u00e1m logiky garbage collection, rezervaci pam\u011bti a rozd\u011blov\u00e1n\u00ed blok\u016f pro sn\u00ed\u017een\u00ed opot\u0159eben\u00ed. <\/p>\n

Nap\u0159\u00edklad SEF umo\u017e\u0148uje normalizovat v\u00fdkon v podm\u00ednk\u00e1ch pou\u017e\u00edv\u00e1n\u00ed pole r\u016fzn\u011b zakoupen\u00fdch \u00falo\u017ei\u0161\u0165 s odli\u0161n\u00fdmi charakteristikami. Pro \u00falo\u017ei\u0161t\u011b, kter\u00e1 jsou p\u0159ev\u00e1\u017en\u011b pou\u017e\u00edv\u00e1na pouze pro \u010dten\u00ed, lze d\u00edky SEF pou\u017e\u00edt jednodu\u0161\u0161\u00ed algoritmy rozd\u011blov\u00e1n\u00ed blok\u016f a sn\u00ed\u017eit pam\u011b\u0165 rezervovanou pro administrativn\u00ed \u00fa\u010dely.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u044f Linux Foundation \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u043b\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0445 Flash-\u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435\u0439 SEF (Software Enabled Flash), \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u043e\u0439 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u043a\u043e\u0434\u0430, \u043f\u0435\u0440\u0435\u0434\u0430\u043d\u043d\u043e\u0433\u043e \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 KIOXIA (\u0434\u043e \u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u044f Toshiba Memory Corporation), \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0432 1980 \u0433\u043e\u0434\u0443 \u0431\u044b\u043b\u0430 \u0438\u0437\u043e\u0431\u0440\u0435\u0442\u0435\u043d\u0430 Flash-\u043f\u0430\u043c\u044f\u0442\u044c. \u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u044b \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 BSD. \u0418\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0432 \u0441\u0435\u0431\u044f \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f […]<\/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-112173","post","type-post","status-publish","format-standard","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\udd47Byla zve\u0159ejn\u011bna platforma SEF pro softwarov\u011b \u0159\u00edzen\u00e9 Flash \u00falo\u017ei\u0161t\u011b | ProHoster","description":"Organizace Linux Foundation p\u0159edstavila prvn\u00ed vyd\u00e1n\u00ed otev\u0159en\u00e9 platformy pro softwarov\u011b \u0159\u00edzen\u00e9 Flash \u00falo\u017ei\u0161t\u011b SEF (Software Enabled Flash), postaven\u00e9 na z\u00e1klad\u011b k\u00f3du p\u0159edan\u00e9ho 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