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+--- Thread: Best practices for ram disks (/t-best-practices-for-ram-disks)
Best practices for ram disks - TheDreadPirate - 2023-06-26
What is everyone's opinion for ram disk best practices? This can be specific to Jellyfin or in general.
I saw in gaming09's signature that he used a ram disk for transcoding files. I decided to do that as well for performance reasons and to reduce the amount of writes to my SSD. Even though my aging Intel x25-M G2 still has 97% of its write endurance left.
Is there any reason to use /dev/shm over setting up a tmpfs in an arbitrary directory? I opted for the latter.
RE: Best practices for ram disks - TheTrueLinuxDev - 2023-06-27
Well if you run the following command:
df /dev/shmyou may receive an output as thus:
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 65882212 78864 65803348 1% /dev/shm
/dev/shm is always configured to be tmpfs whereas /tmp varies on different linux distro and /var/tmp should not be tmpfs since the temporary files in /var/tmp should persist between reboots.
RE: Best practices for ram disks - iconoclasthero - 2023-12-03
So I just started using Jellyfin (and I haven't gotten transcoding to work yet), but I was looking back into the OP's question and found it via a google search for ca. "best practices for ramdisk ubuntu." I've been using /dev/shm/cache for quite a number of years now with no problem. What I don't know is if there are any drawbacks to using that and if it is really using ram or if tmpfs is also putting stuff on disk. I have ca. 24 GB ram and am always using /dev/shm/cache for all kinds of file manipulation/work so that I don't write stuff to media until I'm done...or if I just want to put stuff in a volitile space that won't be there when I reboot.
Are there any known disadvantages to using /dev/shm/ for ram drive I should know about?
Code:
$ pwd; df .
/dev/shm/cache
Filesystem Size Used Avail Use% Mounted on
tmpfs 12G 3.6G 8.3G 30% /dev/shmRE: Best practices for ram disks - iconoclasthero - 2023-12-03
ramfs vs. tmpfs: https://unix.stackexchange.com/questions/66329/creating-a-ram-disk-on-linux