{"id":120974,"date":"2024-12-13T15:46:01","date_gmt":"2024-12-13T13:46:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-otkazoustojchivoj-fajlovoj-sistemy-littlefs-2-10"},"modified":"2024-12-13T15:46:01","modified_gmt":"2024-12-13T13:46:01","slug":"vypusk-otkazoustojchivoj-fajlovoj-sistemy-littlefs-2-10","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/vypusk-otkazoustojchivoj-fajlovoj-sistemy-littlefs-2-10","title":{"rendered":"L\u00ebshimi i sistemit t\u00eb skedar\u00ebve me q\u00ebndrueshm\u00ebri LittleFS 2.10","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
\u00cbsht\u00eb publikuar versioni i projektit LittleFS 2.10, i cili zhvillon nj\u00eb sistem t\u00eb kompakt t\u00eb skedar\u00ebve p\u00ebr pajisje t\u00eb integruara dhe mikro-kontrollor\u00eb. Originari i k\u00ebtij sistemi t\u00eb skedar\u00ebve u krijua nga kompania ARM p\u00ebr sistemin operativ Mbed OS, por m\u00eb von\u00eb u ndan n\u00eb nj\u00eb projekt t\u00eb ve\u00e7ant\u00eb. Kodi i FS \u00ebsht\u00eb shkruar n\u00eb gjuh\u00ebn C dhe shp\u00ebrndahet n\u00ebn licenc\u00ebn BSD. Implementimi referues i LittleFS vjen si nj\u00eb bibliotek\u00eb n\u00eb gjuh\u00ebn C, mbi baz\u00ebn e s\u00eb cil\u00ebs \u00ebsht\u00eb nd\u00ebrtuar nj\u00eb modul FUSE dhe lidhje p\u00ebr gjuh\u00eb t\u00eb ndryshme programimi. <\/p>\n
Karakteristikat e LittleFS: <\/p>\n
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K\u00ebrkesa t\u00eb ulta p\u00ebr burime dhe mb\u00ebshtetje p\u00ebr funksionimin n\u00eb kushte me madh\u00ebsi t\u00eb kufizuar t\u00eb RAM-it. Implementimi i LittleFS p\u00ebrdor vet\u00ebm bufer t\u00eb definuar n\u00eb m\u00ebnyr\u00eb statike (pa alokim dinamik t\u00eb memories) dhe nuk p\u00ebrdor thirrje rekursive, gj\u00eb q\u00eb siguron se sasia e memories operative dhe struktura sh\u00ebrbyese t\u00eb LittleFS n\u00eb mbajt\u00ebs mbetet gjithmon\u00eb e q\u00ebndrueshme, pavar\u00ebsisht se \u00e7far\u00eb shkruhet n\u00eb FS dhe madh\u00ebsis\u00eb s\u00eb depozit\u00ebs.\n
Mjetet p\u00ebr nivelimin e g\u00ebsheve t\u00eb mbajt\u00ebsve Flash (wear leveling), q\u00eb lejojn\u00eb minimizimin e rip\u00ebrdorimit t\u00eb blloqeve dhe shp\u00ebrndarjen e barabart\u00eb t\u00eb operacioneve t\u00eb pastrimit t\u00eb blloqeve n\u00eb memories Flash, kontrolli i t\u00eb cil\u00ebs nuk ofron zgjidhje p\u00ebr k\u00ebt\u00eb problem.\n
Q\u00ebndrueshm\u00ebri shum\u00eb e lart\u00eb ndaj defekteve \u2014 FS e konsideron nd\u00ebrprerjen e rast\u00ebsishme t\u00eb funksionimit (nd\u00ebrprerjen p\u00ebrmes shk\u00ebputjes s\u00eb energjis\u00eb) si nj\u00eb situat\u00eb normale dhe garanton q\u00eb ruajtja n\u00eb disk t\u00eb jet\u00eb n\u00eb gjendje t\u00eb plot\u00eb n\u00eb \u00e7do moment. P\u00ebr t\u00eb eliminuar shkeljen e integritetit dhe humbjen e t\u00eb dh\u00ebnave, aplikohet mekanizmi copy-on-write (COW), ku ndryshimet nuk mbivendosen mbi informacionin, por ruhen n\u00eb nj\u00eb vend t\u00eb ri.\n
Ato jan\u00eb operacione atomike, si fshirja dhe em\u00ebrimi, edhe n\u00eb rast se ndalet energjia gjat\u00eb ekzekutimit t\u00eb tyre. Ndryshimet e skedareve shp\u00ebrndahen n\u00eb disk vet\u00ebm pas thirjes s\u00eb sync ose close. Pasiguri t\u00eb shkaktuara nga operacione q\u00eb nuk mund t\u00eb kryhen n\u00eb m\u00ebnyr\u00eb atomike u zgjidhen nga nj\u00eb trajtues i ve\u00e7ant\u00eb deorphan, i cili kalon n\u00ebp\u00ebr t\u00eb gjith\u00eb pem\u00ebn e FS pas ngarkimit.\n
Mb\u00ebshtetje p\u00ebr funksione t\u00eb ngjashme me POSIX p\u00ebr pun\u00ebn me skedar\u00eb dhe katalog\u00eb. <\/ul>\n
P\u00ebrmbajtja e skedar\u00ebve n\u00eb LittleFS paraqitet me lista COW-CTZ, duke siguruar nj\u00eb nd\u00ebrlikim O(1) p\u00ebr shtimin dhe O(nlogn) p\u00ebr leximin. Alokimi i blloqeve realizohet p\u00ebrmes skanimit t\u00eb FS p\u00ebr blloqet e p\u00ebrdorura n\u00eb nj\u00eb zon\u00eb me madh\u00ebsi fiks, t\u00eb ruajtur si nj\u00eb vektor bit\u00ebsh. P\u00ebr t\u00eb leht\u00ebsuar skanimin, t\u00eb gjith\u00eb katalog\u00ebt jan\u00eb pjes\u00eb e nj\u00eb liste t\u00eb lidhur q\u00eb p\u00ebrfshin t\u00eb gjith\u00eb sistemin e skedar\u00ebve. N\u00ebse gjat\u00eb shkrimit t\u00eb nj\u00eb blloku p\u00ebrcaktohet nj\u00eb gabim, alokohet nj\u00eb bllok i ri dhe t\u00eb dh\u00ebnat transferohen n\u00eb t\u00eb. <\/p>\n
Ndryshimet n\u00eb versionin e ri t\u00eb LittleFS: <\/p>\n
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Kodi p\u00ebr p\u00ebrpunimin e rrug\u00ebve t\u00eb skedar\u00ebve \u00ebsht\u00eb riparuar, duke p\u00ebrafruar sjelljen e FS me sistemet POSIX dhe pritshm\u00ebrit\u00eb e p\u00ebrdoruesve n\u00eb situata t\u00eb tilla si p\u00ebrfundimi i rrug\u00ebs me slash, p\u00ebrpunimi i rrug\u00ebve bosh dhe navigimi p\u00ebrtej rr\u00ebnj\u00ebs s\u00eb FS.\n
Jan\u00eb shtuar dy shembuj t\u00eb rinj t\u00eb pajisjeve bllok, ramcrc32bd dhe ramrsbd, t\u00eb cilat implementojn\u00eb nj\u00eb mekaniz\u00ebm korrekcioni t\u00eb gabimeve, t\u00eb p\u00ebrshtatsh\u00ebm p\u00ebr LittleFS. N\u00eb form\u00ebn e saj aktuale, n\u00eb vet\u00eb FS LittleFS nuk ka mb\u00ebshtetje p\u00ebr p\u00ebrcaktimin dhe korrigjimin e gabimeve dhe k\u00ebto operacione transferohen n\u00eb nivelin e pajisjeve bllok.\n
N\u00eb funksionin lfs_mkdir \u00ebsht\u00eb shtuar mb\u00ebshtetje p\u00ebr slashes p\u00ebrfundimtar\u00eb, dmth. thirrja lfs_mkdir(\u2018a\/\u2019) tani nuk do t\u00eb shkaktoj\u00eb nj\u00eb gabim.\n
N\u00eb funksionet lfs_stat dhe lfs_getattr tani kthehet nj\u00eb gabim kur p\u00ebrdoren slashet p\u00ebrfundimtar\u00eb, n\u00ebse rruga ekzistuese n\u00eb FS nuk \u00ebsht\u00eb nj\u00eb katalog.\n
P\u00ebrpjekja p\u00ebr t\u00eb hapur nj\u00eb skedare me slashen p\u00ebrfundimtar n\u00eb em\u00ebr tani do t\u00eb \u00e7oj\u00eb n\u00eb gabimin LFS_ERR_NOTDIR, n\u00ebse skedari nuk \u00ebsht\u00eb nj\u00eb katalog n\u00eb FS, LFS_ERR_ISDIR, n\u00ebse emri i referohet nj\u00eb katalogu n\u00eb FS, dhe LFS_O_CREAT, n\u00ebse skedari nuk ekziston.\n
P\u00ebrpjekja p\u00ebr t\u00eb aksesuar jasht\u00eb sistemit t\u00eb skedar\u00ebve root, p\u00ebr shembull, lfs_stat(\u2018\/.. \/a\u2019), tani do t\u00eb rezultoj\u00eb n\u00eb nj\u00eb gabim.\n
Specifikimi i nj\u00eb rruge t\u00eb zbraz\u00ebt tani nuk \u00ebsht\u00eb sinonim i aksesit n\u00eb katalogun kryesor, dmth. thirrja lfs_stat(\u2018\u2019) do t\u00eb rezultoj\u00eb n\u00eb nj\u00eb gabim. <\/ul>\n