Difference between revisions of "Ramdisk"
From Linuxintro
imported>ThorstenStaerk (New page: A Ramdisk in Linux can be created on the /tmp folder using the command mount -t tmpfs tmpfs /tmp -o size=512M In this case, the Ramdisk will be 512MB big.) |
|||
| (One intermediate revision by one other user not shown) | |||
| Line 2: | Line 2: | ||
mount -t tmpfs tmpfs /tmp -o size=512M | mount -t tmpfs tmpfs /tmp -o size=512M | ||
In this case, the Ramdisk will be 512MB big. | In this case, the Ramdisk will be 512MB big. | ||
| + | |||
| + | = Increase size = | ||
| + | To increase the Ramdisk's size without loosing a file, use | ||
| + | mount -t tmpfs tmpfs /tmp -o size=1024M,remount | ||
| + | |||
| + | = How it looks = | ||
| + | Once you have mounted /tmp as a RAMDISK, changes will not persist a reboot. New files will cause RAM consumption. To find out if you have /tmp being a RAMDISK, use the command mount or df: | ||
| + | <pre> | ||
| + | root@instance-2:~# df -h | grep tmp | ||
| + | tmpfs 99M 320K 99M 1% /run | ||
| + | tmpfs 493M 0 493M 0% /dev/shm | ||
| + | tmpfs 5.0M 0 5.0M 0% /run/lock | ||
| + | tmpfs 493M 0 493M 0% /sys/fs/cgroup | ||
| + | tmpfs 99M 0 99M 0% /run/user/838632064 | ||
| + | tmpfs 12M 0 12M 0% /tmp | ||
| + | root@instance-2:~# mount | grep tmp | ||
| + | udev on /dev type devtmpfs (rw,nosuid,relatime,size=495576k,nr_inodes=123894,mode=755) | ||
| + | tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=100956k,mode=755) | ||
| + | tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) | ||
| + | tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k) | ||
| + | tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755) | ||
| + | tmpfs on /run/user/838632064 type tmpfs (rw,nosuid,nodev,relatime,size=100952k,mode=700,uid=838632064,gid=838632064) | ||
| + | tmpfs on /tmp type tmpfs (rw,relatime,size=12288k) | ||
| + | </pre> | ||
| + | In the above example you have a RAMDISK on /tmp and on some system directories. | ||
Latest revision as of 09:31, 27 November 2021
A Ramdisk in Linux can be created on the /tmp folder using the command
mount -t tmpfs tmpfs /tmp -o size=512M
In this case, the Ramdisk will be 512MB big.
Increase size
To increase the Ramdisk's size without loosing a file, use
mount -t tmpfs tmpfs /tmp -o size=1024M,remount
How it looks
Once you have mounted /tmp as a RAMDISK, changes will not persist a reboot. New files will cause RAM consumption. To find out if you have /tmp being a RAMDISK, use the command mount or df:
root@instance-2:~# df -h | grep tmp tmpfs 99M 320K 99M 1% /run tmpfs 493M 0 493M 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 493M 0 493M 0% /sys/fs/cgroup tmpfs 99M 0 99M 0% /run/user/838632064 tmpfs 12M 0 12M 0% /tmp root@instance-2:~# mount | grep tmp udev on /dev type devtmpfs (rw,nosuid,relatime,size=495576k,nr_inodes=123894,mode=755) tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=100956k,mode=755) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k) tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755) tmpfs on /run/user/838632064 type tmpfs (rw,nosuid,nodev,relatime,size=100952k,mode=700,uid=838632064,gid=838632064) tmpfs on /tmp type tmpfs (rw,relatime,size=12288k)
In the above example you have a RAMDISK on /tmp and on some system directories.
