tmpfs in /etc/fstab ....

[Dave Babb]

This should help you.

I use tmpfs for /tmp, I use tmpfs for a RamDisk where I do a lot of 
small compilations, and I also use tmpfs for my /usr/obj tree. I have an 
SSD that I want to protect at all costs. tmpfs will use half of your ram 
before going to swap. In my case, I have 32Gb of ram and no swap.

I just did a buildworld, followed by a portmaster -af. At the worst 
case...I was using 7% of my tmpfs ram, according to df -h....7 % of 16Gb 
is only 1.12 Gb.

So I had no issue doing some heavy duty system rebuilding from 
ram......via tmpfs. I did this the long way because I needed the 
experience...I understand and have been told that there are easier and 
shorter ways.....But I did it to learn about rebuilding world which to 
date I  had never done.



Hope this helps!


Dave





On 09/12/14 22:06, William A. Mahaffey III wrote:
>
>
> .... I would like to enable use of tmpfs on my FBSD 9.3 box for 
> performance. The box has 16 GB of both RAM & swap. I added 
> 'tmpfs_load="YES"' to my /boot/loader.conf, but I can't figure out 
> what to put in /etc/fstab to allow the process to happen automatically 
> upon reboot. Specifically, what is the device I should be using. The 
> man page gives the mount command, which looks like the device is 
> called 'tmpfs'. Is that correct ? Are there any issues w/ this 
> procedure ? TIA ....
>
>

-------------- next part --------------
# Daves customized fstab for FreeBSD
#
#
# First Lines are for system required entries
#
#
#
# keep temporary files and in ram rather than wear out the SSD
#
# Device								Mountpoint						FStype				Options						Dump	Pass#

tmpfs									/tmp							tmpfs				rw,mode=01777				0		0
tmpfs									/usr/home/dcbdbis/RamDisk		tmpfs				rw							0		0
tmpfs									/usr/obj						tmpfs				rw,mode=01777				0		0

# Keeps OpenJDK happy and some linux apps as well

fdesc									/dev/fd							fdescfs				rw							0		0
proc									/proc							procfs				rw							0		0

# -------------------------------------------------------
# End of system level fstab entries, now on to the devices
# -------------------------------------------------------

# Device								Mountpoint						FStype				Options						Dump	Pass#
	
# /dev/ada0p2 is the root drive
/dev/ada0p2								/								ufs					rw,noatime					1		1

# /dev/ada1p1, Backup-1
/dev/gpt/Backup-1						/media/Backup-1					ufs					rw,noatime					0		2

# /dev/ada2p1, Backup-2
/dev/gpt/Backup-2						/media/Backup-2					ufs					rw,noatime					0		2

# /dev/ada3p3, Misc storage and VM's
/dev/gpt/Misc							/media/Misc						ufs					rw,noatime					0		2