Ramdisk: Difference between revisions

Revision as of 14:15, 9 March 2018

On critical daq servers (clondaqx) directory /et resides in ramdisk. Add following line in /etc/fstab:

 none  /et  tmpfs   nodev,nosuid,noexec,nodiratime,size=4096M   0 0

it will show up after reboot.

General info

Check available memory size:

free -g

Example of creating 4G ramdisk and mounting it as /mnt/ramdisk:

su
mkdir /mnt/ramdisk
mount -t tmpfs -o size=4g xfs /mnt/ramdisk

@@ Line 1: / Line 1: @@
-On critical daq servers (clondaqx) directory ''/et'' resides in ramdisk. Following have to be done during installation:
+On critical daq servers (clondaqx) directory ''/et'' resides in ramdisk. Add following line in ''/etc/fstab'':
-  su
+  none  /et  tmpfs   nodev,nosuid,noexec,nodiratime,size=4096M   0 0
- mkdir /et
-  mount -t tmpfs -o size=4096M xfs /et
-To make it permanent, add following line in ''/etc/fstab'':
+it will show up after reboot.
-  tmpfs   /etc   xfs   nodev,nosuid,noexec,nodiratime,size=4096M   0 0
@@ Line 22: / Line 19: @@
   mkdir /mnt/ramdisk
   mount -t tmpfs -o size=4g xfs /mnt/ramdisk
-To make it permanent, add it to ''/etc/fstab'':
- tmpfs   /mnt/ramdisk   xfs   nodev,nosuid,noexec,nodiratime,size=4096M   0 0