Ramdisk

On critical daq servers (clondaqx) directory /et have to reside in ramdisk. Create directory /et, and add following line in /etc/fstab:

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

it will show up after reboot. To enable it without reboot, type mkdir /et and mount /et.

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