Ku-Unix namasistimu wokusebenza wekhompuyutha ahlobene, isichazi sefayela (i-FD, ama-fildes angavamile) iyinkomba engabonakali (isibambo) esisetshenziselwa ukufinyelela ifayela noma enye insiza yokufaka/yokukhiphayo, njengepayipi noma isokhethi yenethiwekhi.
Sisebenza kanjani isichazi sefayela?
Isichazi sefayela inombolo ekhomba ngokuhlukile ifayela elivuliwe kusistimu yokusebenza yekhompyutha. Ichaza insiza yedatha, nokuthi leyo nsiza ingafinyelelwa kanjani. Uma uhlelo lucela ukuvula ifayela - noma enye insiza yedatha, njengesokhethi yenethiwekhi - i-kernel: ... Idala okufakiwe kuthebula lefayela lomhlaba jikelele.
Yiziphi izichazi zefayela futhi zabelwe kanjani?
Ku-kernel, wonke amafayela avuliwe abhekiswa yi-File Descriptors. Isichazi sefayela inombolo engeyona inegethivu. Uma sivula ifayela elikhona noma sidala ifayela elisha, i-kernel ibuyisela isichazi sefayela kunqubo. I-kernel igcina ithebula lazo zonke izichazi zefayela ezivuliwe, ezisetshenziswayo.
Uyini umkhawulo wesichazi sefayela ku-Linux?
Amasistimu e-Linux akhawulela inani lezincazelo zefayela noma iyiphi inqubo eyodwa engase ilivulekele ku-1024 ngenqubo ngayinye. …
Isho ukuthini isichazi sefayela elibi?
“Isichazi sefayela esingalungile” sisho ukuthi sizame ukwenza umsebenzi encazelweni yefayela engasebenzi, cishe evalwe ngaphansi kwezinyawo zothile. Ayisekho indlela yefayela ehlotshaniswa nayo.
Ingabe u-0 uyisichazi sefayela esivumelekile?
Ububanzi bamanani angaba khona bezichazi zefayela busuka ku-0 kuye ku-1023 kusistimu ye-Linux (32-bit noma 64-bit system). Awukwazi ukudala isichazi sefayela esinenani elingaphezu kuka-1023.
Uyini umehluko phakathi kwesikhombi sefayela nesichazi sefayela?
Isichazi sefayela “isibambo” sezinga eliphansi esisetshenziselwa ukukhomba ifayela elivuliwe (noma isokhethi, noma yini) ezingeni le-kernel, ku-Linux namanye amasistimu afana ne-Unix. … I-FILE pointer iyizinga elingu-C lezinga lomtapo wolwazi, elisetshenziselwa ukumela ifayela.
Yini i-Unix echaza ifayela?
Ku-Unix namasistimu wokusebenza wekhompuyutha ahlobene, isichazi sefayela (i-FD, ama-fildes angavamile) iyinkomba engabonakali (isibambo) esisetshenziselwa ukufinyelela ifayela noma enye insiza yokufaka/yokukhiphayo, njengepayipi noma isokhethi yenethiwekhi.
Mangaki amafayela angavulwa ku-Linux?
Izinhlelo ze-Linux zikhawulela inani lezichazi zefayela noma iyiphi inqubo eyodwa engase ilivulekele ku-1024 ngenqubo ngayinye.
Ngisithola kanjani isichazi sefayela kusuka kusikhombisi sefayela?
Futhi ungayenza kanjani isiqondiso esibuyela emuva: thola isichazi sefayela kusuka kusikhombisi se-FILE? Thola i-FILE pointer kusichazi sefayela (isb. fd ) ku-C ku-Linux: FILE *file = fdopen(fd, “w”); Lapha, ipharamitha yesibili izindlela ongakhetha kuzo lezo fopen .
Iyini i-Ulimits ku-Linux?
I-ulimit iwukufinyelela komqondisi okudingekayo umyalo wegobolondo le-Linux osetshenziselwa ukubona, ukusetha, noma ukukhawulela ukusetshenziswa kwensiza yomsebenzisi wamanje. Isetshenziselwa ukubuyisela inombolo yezichazi zefayela ezivulekile zenqubo ngayinye. Iphinde isetshenziselwe ukubeka imikhawulo kuzinsiza ezisetshenziswa inqubo.
Ngiyibona kanjani imikhawulo evulekile ku-Linux?
Kungani inani lamafayela avuliwe lilinganiselwe ku-Linux?
- thola umkhawulo wamafayela avuliwe ngenqubo ngayinye: ulimit -n.
- bala wonke amafayela avuliwe ngazo zonke izinqubo: lsof | wc -l.
- thola inombolo enkulu evunyelwe yamafayela avuliwe: cat /proc/sys/fs/file-max.
Ungayishintsha kanjani i-Ulimit?
- Ukushintsha isilungiselelo solimit, hlela ifayela /etc/security/limits.conf bese usetha imikhawulo eqinile nethambile kulo : ...
- Manje, hlola izilungiselelo zesistimu usebenzisa imiyalo engezansi: ...
- Ukuhlola umkhawulo wamanje wokuchaza ifayela elivuliwe: ...
- Ukuze uthole ukuthi zingaki izichazi zefayela ezisetshenziswayo njengamanje:
Ngisilungisa kanjani isichazi sefayela esibi ku-Linux?
I-Linux ntpd sendto() Iphutha lesichazi sefayela elibi nesixazululo
- Isinyathelo #1: Misa i-ntpd. Thayipha umyalo olandelayo ukuze umise i-ntpd: ...
- Isinyathelo #2: bulala i-ntpd. Thayipha umyalo olandelayo ukubulala zonke izimo ze-ntpd: ...
- Isinyathelo #3: Qala i-ntpd. # /etc/init.d/ntpd qala.
- Isinyathelo #4: Buka ifayela lokungena /var/log/messages. Sebenzisa umyalo womsila:
14 unyaka. 2007 г.