Day: February 6, 2012

How to use RAM (physical) as disk

How to use RAM (physical) as disk

Introduction –
Sometime to gain performance, physical ram can be used as disk space which is very fast compare to normal hard disk.
So, how I can use RAM is disk ? go through this steps.

Step 1) Create directory as shown below where you want to mount RAM as disk

root@arunbagul:~# mkdir -p /tmp/ram
root@arunbagul:~# ls /tmp/ram
root@arunbagul:~#

Step 2) mount RAM ie tmpfs at mount point “/tmp/ram” directory-

root@arunbagul:~#  mount -t tmpfs -o size=10M tmpfs /tmp/ram/

* check mounted on not ?

root@arunbagul:~# df -h
Filesystem            Size  Used Avail Use% Mounted on
tmpfs                  10M     0   10M   0% /tmp/ram

** to mount this permanently add entry in /etc/fstab as shown below.

root@arunbagul:~#  cat /etc/fstab

….

tmpfs        /tmp/ram    tmpfs    defaults,size=10m    0    0

root@arunbagul:~#

– To mount this use mount command (this will mount all mount points mentioned in fstab)

root@arunbagul:~# mount -a

Thank you,
Arun Bagul