FS tmpfs

[mykol]

Ciao,

mi ritrovo con

root@LinuxBoxCompaq:/home/giorgio# df -h
Filesystem Dimens. Usati Disp. Uso% Montato su
/dev/hda5 5,1G 4,7G 412M 93% /
/dev/hda8 2,9G 2,3G 543M 82% /home
/dev/hda1 5,0G 4,9G 83M 99% /mnt/win_c
/dev/hda7 5,5G 15M 5,5G 1% /mnt/win_d
tmpfs 380M 0 380M 0% /dev/shm

Che è sto tmpfs ? Posso utilizzare in qualche modo il relativo spazio, visto che ne ho poco ?

Questo è l'fstab

root@LinuxBoxCompaq:/home# cat /etc/fstab
/dev/hda5 / reiserfs notail,noatime 1 1
none /dev/pts devpts mode=0620 0 0
/dev/hda8 /home ext3 noatime 1 2
# none /mnt/cdrom supermount dev=/dev/hdc,fs=udf:iso9660,ro,--,iocharset=iso8859-15 0 0

/dev/hdc /mnt/cdrom user,ro,iso9660,--,iocharset=iso8859-15 0 0

/dev/hda1 /mnt/win_c vfat iocharset=iso8859-15,umask=0,codepage=850 0 0
# /dev/sda1 /mnt/win_c2 vfat iocharset=iso8859-15,umask=0,codepage=850 0 0
/dev/sda1 /mnt/sda1 vfat users,rw,iocharset=iso8859-15,umask=0,codepage=850 0 0
/dev/hda7 /mnt/win_d vfat users,rw,iocharset=iso8859-15,umask=0,codepage=850 0 0
none /proc proc defaults 0 0
/dev/dvd /dvd auto
/dev/hda6 swap swap defaults 0 0
root@LinuxBoxCompaq:/home#

Grazie a tutti e buona domenica

[Ikitt]

Originariamente inviato da mykol
root@LinuxBoxCompaq:/home/giorgio# df -h
Filesystem Dimens. Usati Disp. Uso% Montato su
/dev/hda5 5,1G 4,7G 412M 93% /
/dev/hda8 2,9G 2,3G 543M 82% /home
/dev/hda1 5,0G 4,9G 83M 99% /mnt/win_c
/dev/hda7 5,5G 15M 5,5G 1% /mnt/win_d
tmpfs 380M 0 380M 0% /dev/shm

Che è sto tmpfs ? Posso utilizzare in qualche modo il relativo spazio, visto che ne ho poco ?

Tmpfs is a file system which keeps all files in virtual 
memory.

Everything in tmpfs is temporary in the sense that no 
files will be created on your hard drive. If you unmount a 
tmpfs instance, everything stored therein is lost.

tmpfs puts everything into the kernel internal caches and 
grows and shrinks to accommodate the files it contains and 
is able to swap unneeded pages out to swap space. It has 
maximum size limits which can be adjusted on the fly via 
'mount -o remount ...'

If you compare it to ramfs (which was the template to create
tmpfs) you gain swapping and limit checking. Another similar
thing is the RAM disk (/dev/ram*), which simulates a fixed 
size hard disk in physical RAM, where you have to create an 
ordinary filesystem on top. Ramdisks cannot swap and you do 
not have the possibility to resize them.

Maggior informazioni in linux-2.6.x/Documentation/filesystems/tmpfs.txt

[mykol]

grazie