{"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\/ro\/blog\/news\/opublikovana-platforma-sef-dlya-programmno-upravlyaemyh-flash-nakopitelej","title":{"rendered":"A fost lansat\u0103 platforma SEF pentru unit\u0103\u021bi Flash gestionate software","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Organiza\u021bia Linux Foundation a prezentat prima versiune a platformei deschise pentru unit\u0103\u021bi Flash gestionate software SEF (Software Enabled Flash), bazat\u0103 pe codul furnizat de compania KIOXIA (fost\u0103 Toshiba Memory Corporation), unde a fost inventat\u0103 memoria Flash \u00een 1980. Codul surs\u0103 al instrumentarului este scris \u00een limbajul C \u0219i este distribuit sub licen\u021ba BSD. <\/p>\n

Instrumentele includ un set de patch-uri pentru nucleul Linux, un driver bloc pentru dispozitive SEF (Software Enabled Flash), utilitare pentru gestionarea din linia de comand\u0103, drivere SEF paravirtualizate pentru QEMU, o bibliotec\u0103 cu API pentru dezvoltarea aplica\u021biilor, patch-uri pentru nvme-cli \u0219i FIO, care adaug\u0103 suport pentru SEF. SDK-ul include, de asemenea, o implementare de referin\u021b\u0103 a nivelului de program FTL (Flash Translation Layer), care asigur\u0103 traducerea comenzilor dispozitivelor de stocare \u00een apeluri c\u0103tre chip-ul efectiv de memorie Flash, colectarea de\u0219eurilor \u0219i distribuirea datelor \u00eentre celulele de memorie. FTL implementeaz\u0103 suport pentru plasarea flexibil\u0103 a datelor (FDP - Flexible Data Placement), zonarea (ZNS - Zoned Namespace) \u0219i specifica\u021bia NVMe. <\/p>\n

\u00cen cazul unit\u0103\u021bilor Flash obi\u0219nuite pentru sisteme externe, unitatea este un fel de cutie neagr\u0103, o parte din memorie fiind rezervat\u0103 pentru opera\u021biuni de serviciu, iar performan\u021ba este variabil\u0103 \u0219i apar \u00eent\u00e2rzieri imprevizibile din cauza activit\u0103\u021bii interioare a controller-ului, de exemplu, \u00een timpul gestion\u0103rii de\u0219eurilor. Spre deosebire de unit\u0103\u021bile Flash tradi\u021bionale, unde distribu\u021bia datelor, izolarea blocurilor defecte \u0219i gestionarea de\u0219eurilor sunt efectuate de firmware-ul controller-ului, unit\u0103\u021bile cu suport SEF permit mutarea logicii de lucru la nivel de chip Flash \u00een software \u0219i sistemul de operare. <\/p>\n

SEF ofer\u0103 posibilitatea de a gestiona direct plasarea fizic\u0103 a datelor, de a schimba algoritmii de distribuire a sarcinii, de a gestiona priorit\u0103\u021bile \u0219i QoS, de a elimina un strat suplimentar de traducere a blocurilor, de a utiliza \u00eentreaga memorie disponibil\u0103, de a ob\u021bine un comportament predictibil cu unitatea de stocare \u0219i de a separa unitatea de stocare \u00een dispozitive virtuale, izolate la nivel de I\/O \u0219i cu priorit\u0103\u021bi diferite \u00een prelucrare. Abordarea propus\u0103 de SEF permite reducerea costurilor \u0219i cre\u0219terea eficien\u021bei interac\u021biunii cu unitatea de stocare prin adaptarea la nevoile actuale ale logicii de colectare a gunoiului, rezerv\u0103rii memoriei \u0219i distribu\u021biei blocurilor pentru a reduce uzura. <\/p>\n

De exemplu, SEF permite normalizarea performan\u021bei \u00een condi\u021bii de utilizare a unui array de unit\u0103\u021bi de stocare achizi\u021bionate \u00een momente diferite, cu caracteristici diferite. Pentru unit\u0103\u021bile de stocare care sunt utilizate predominant doar pentru citire, SEF permite utilizarea unor algoritmi de distribu\u021bie a blocurilor mai simpli \u0219i reducerea memoriei rezervate pentru scopuri administrative.
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Sursa: opennet.ro<\/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\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\udd47Platforma SEF pentru unit\u0103\u021bi de stocare Flash gestionate prin software a fost publicat\u0103 | ProHoster","description":"Organiza\u021bia Linux Foundation a prezentat prima versiune a platformei deschise pentru unit\u0103\u021bile de stocare Flash gestionate prin software SEF (Software Enabled Flash), construit\u0103 pe baza codului livrat de compania 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ProHoster","og:description":"\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 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