Topics: Red Hat, System Administration

Increase the size of a tmpfs file system

On Linux systems, a tmpfs filesystem keeps the entire filesystem (with all its files) in virtual memory. All data is stored in memory, which means the data is temporary and will be lost after a reboot. If you unmount the filesystem, all data in the file system is gone. You can also a lot of installations using a tmpfs for /tmp and hence anything written to /tmp is wiped after a reboot.

To increase the size, do the following:

Modify /etc/fstab line to look something like this:

none /raw tmpfs defaults,size=2G 0 0
Then, re-mount the file system:
# mount -o remount /raw # df -h
Note: Be careful not to increase it too much as the system will use up real memory.