Okokufundisa: I-Loop File Systems

Luyini uhlelo lwefayela le-loop?

I-Gnu / Linux (kanye neningi lezinhlelo ze-unix) inendlela evumela ukufaka ifayili (elifomethwe ngaphambilini) njengokungathi yidiski eliqinile, imvamisa ngaphandle kwetafula lokuhlukanisa. Lo mdwebo we-crappy (owenziwe yimi) uchaza ukuthi le ndlela isebenza kanjani.

** Ayimeleli ngokuphelele ukusebenza kwangempela.

Ukusetshenziswa kwamafayela we-loop

Amafayela we-1- Mount.iso

Amafayela we-.iso, ubuhle obusezingeni elijwayelekile kuma-CD nakuma-DVD, awalutho ngaphandle kwefayela elingu-loop uhlelo lwalo olungaba ISO 9960 (okuvame kakhulu kumaCD) noma UDF (okuvame kakhulu kuma-DVD). Ukuyifaka, sizosebenzisa umyalo we-mount.

mkdir iso # sakha umkhombandlela chmod -R 666 iso # sinikeza bonke abasebenzisi funda imvume ukukhweza isithombe.iso iso / # sifaka isithombe se-iso (sidinga impande)

Umkhawulo onawo ukuthi, ngenxa yezizathu ezisobala, womabili la mafayili amafayili afundwa kuphela.

2- ama-squashfs afundwayo kuphela

Ake sithi sinefolda yezithombe kanye / noma amavidiyo ahlelwe ngokuya ngonyaka athathwe ngawo. Ngokusobala, akunakwenzeka neze ukuthi sifuna ukuguqula idatha equkethwe kumafolda weminyaka edlule. Yilapho ama-Squashfs engena khona. I-squashfs uhlelo lwefayela olucindezelwe kuphela, ngakho-ke lapho isithombe senziwe, ngeke sikwazi ukuguqula idatha ngaphakathi.

Ngakho-ke, hhayi kuphela sizokonga inani elikhulu lesikhala, kodwa futhi kuzoba nomphumela wokufuna ukwazi ukuthi ukufundwa kwamafayela kuzoshesha, ngokufunda amafayela amancane, ngoba kulezi zinsuku ukucindezela ifayili kungumzamo omncane wama-CPU amaningi.

Ukushiya ama-preambles, ukudala isithombe se-squashfs kufanele sisebenzise umyalo we-mksquashfs, ogama lakhe lilula:

mksquashfs directorio 1 [directorio 2 directorio 3...] imagen.sqsfs -comp [algoritmo de compresión] -b [tamaño del bloque ]

Nasi isibonelo esisebenzayo:

mksquashfs fotos-2009 fotos-2010 fotos-2011 fotos-2012 fotos-2013 fotos_2009-2013.sqsfs -comp xz -bs 1M

Yebo, i-algorithm ekhethiwe yi-xz ngoba yiyo leyo isilinganiso sokucindezela esiphakeme okunikezwayo (kwalokhu okutholakalayo), ngenkathi usayizi webhlokhi okhethiwe ubuningi. ini ivumela imiphumela engcono yokucindezela (ngokuzenzakalela zingama-64KiB).

Manje kufanele sikwazi ukuyifaka ngokulula;

mount fotos_2009-2013.sqsfs fotos_2009-2013/

Ngemuva kokubheka ukuthi konke kulungile, singasusa amafayela woqobo noma sishiye ifayela njengesipele.

Uma kwenzeka sifuna ukuthi ifakwe lapho i-OS iqala, kufanele sengeze umugqa walesi sitayela ku / etc / fstab:

/dir/loop.sqsh /dir/mountdir squashfs ro,defaults 0 0

Manje, kwenzekani lapho sifuna ukufaka noma ukususa amafayela, noma ukumane sikhiphe lezi zithombe? Yebo, sinomyalo umyalo unsquashfs.

unsquashfs [opciones] snapshot.sqfs [Directorios o archivos que extraer]

Ngokuzenzakalelayo izosebenzisa i- "squashfs-root" njengomkhombandlela wesizinda. kungashintshwa nge -d inketho

3- «Ukushintshana okuphuthumayo»

Cabanga ukuthi nganoma yisiphi isizathu (ubuthongo basebusika, ukuhlanganiswa okukhulu ...) udinga ukushintshaniswa okwengeziwe. Yilapho kufakwa khona ifayela le-loop, isinyathelo sokuqala ukwenza ifayela elingenalutho losayizi othile, ngosayizi othile webhulokhi, lokhu sikwenza ngomyalo dd:

dd if=/dev/zero of=loop bs=1M count=512

Kulokhu, ibhlokhi iyi-MiB eyodwa futhi usayizi wefayela ngu-512MiB. Akudingeki kube ngale ndlela.

Sakha futhi sisebenzise ukushintshaniswa ngalo myalo

mkswap loop && swapon loop

Gcina ukhumbula ukuthi ukusebenza kwefayela le-loop kuhlala kuphansi ngandlela thile kunokwenyama yangempela.

4-yenza okufunayo

Lezi ngezinye nje zezibonelo ezivelele, zizwe ukhululekile ukuzama ama-chroots, amasistimu wokubethela, izihibe ezihlanganisiwe… Amathuba akho awanamkhawulo. Kepha, qaphela imiyalo oyisebenzisayo, cabanga ngokucophelela ngaphambi kokucindezela ukungena.

Izixhumanisi zentshisekelo

• I-squashfs wikipedia
• Umuntu mksquashfs
• Umuntu unsquashfs
• iso 9960 wikipedia
• I-UDF wikipedia
• I-Wikipedia ye-VFS
• I-Loop wikipedia