ramdisk in Kubuntu 14.04

[vsreeser]

In my win 7 I use a 2gb ramdisk that saves on exit to store temp internet files. Since I save them instead of cleaning them out (no real benefit to doing that), browsing is very quick. Would like to do the same thing in Kubuntu. Since i have 16Gb ram , using 2Gb for a ramdrive will not have much impact on performance.
Not finding much info on how to do this through searches, except others asking. So I figured i would post it where the people with the most knowledge hang out

[SteveRiley]

A cleaner method is simply to declare that /tmp should use the tempfs partition type.

1. Log out of KDE.
2. Press Ctrl+Alt+F2 to switch to a TTY console.
3. Run sudo rm -rfv /tmp/* to delete anything in the current location.
4. Run sudo nano /etc/fstab. Add the following line at the end:
   

   tmpfs  /tmp  tmpfs  noatime,mode=1777  0  0

5. Press Ctrl+X to save the file and exit the editor.
6. Type sudo reboot to reboot.

Google can help you find instructions for configuring Firefox and Chrom(e)ium to use /tmp for their caches.

[Snowhog]

Interesting.

[SteveRiley]

Contrary to similar advice given elsewhere, I'd recommend not placing any of the /var directories on tmpfs. Items in these directories are intended to persist between reboots. That even includes /var/tmp.

[vsreeser]

I found an easier way. Since I haven't ffound a way yet to make the info persist between rebbots, I just added browser.cache.disk.parent_directory to abount:config in Firefox and set it to /dev/shm which ubuntu already created. Seems to work. Will do some more research on making a ramdrive that will back up contents before restarts.

[oshunluvr]

This page has a similar objective.

http://www.observium.org/wiki/Persis...sk_RRD_storage

Since you're using this with firefox only, you could use a script that would create and populate the ram disk at log in and another to run firefox and save the ramdisk contents when firefox closes.

[vsreeser]

When I set FF to use /dev/shm as storage, it worked fine. When I changed it to use /ramdrive/ffcache, it quit using /dev/shm, but will not work with /ramdrive/ffcache. Copied a couple files into /ramdrive and they stayed through reboot. must be doing something wrong. set browser.cache.disk.parent_directory to /ramdrive/ffcache .. Is forefox a teenager? That would explain why it doesn't do what it's told I have two teens at home

[vsreeser]

Man beats computer. Turns out it was a permission prblem (isn't that true about 95% of the time?)

[SteveRiley]

I found an easier way. Since I haven't ffound a way yet to make the info persist between rebbots, I just added browser.cache.disk.parent_directory to abount:config in Firefox and set it to /dev/shm which ubuntu already created. Seems to work. Will do some more research on making a ramdrive that will back up contents before restarts.

Um, where did you find advice about using /dev/shm? That directory definitely does not persist between reboots. Observe:

steve@t520:~$ [B]ls -al /dev/shm[/B]
lrwxrwxrwx 1 root root 8 Jan  9 16:25 /dev/shm -> /run/shm

steve@t520:~$ [B]cat /proc/mounts | grep /run[/B]
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=805580k,mode=755 0 0
none /run/shm tmpfs rw,nosuid,nodev,relatime 0 0
{...}

/dev/shm is symlinked to /run/shm, and the entire /run directory is tmpfs: meaning that it will not persist between reboots.