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💾 Linux RAM disk persistent with Systemd timer, service and suspend v2025.4.121

🌌 Bugs are evident™ - MATRIX️
🚧 This project is under active development!
📢 We welcome your feedback and contributions.

$3

$3

``txt
v22.13.1
`

📝 Description


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Change log

Change log

Breaking change

readme

Install

`bash
sudo npm install -g p3x-ramdisk --unsafe-perm=true --allow-root
`




IntelliJ Speed


Based on:
http://sheroz.com/pages/blog/improving-development-performance-moving-intellij-idea-cache-ramdisk.html

!http://sheroz.com/pages/blog/improving-development-performance-moving-intellij-idea-cache-ramdisk.html

`text
After all these tricks I tried to open my current project with IntelliJ IDEA 12 …

Wow!!! It is fantastic! Works like a … sword!!!

Why sword?! I don’t know exactly. May be because of Darcula theme. This is just first thought what came to my mind seeing the overall results.

The Intellij IDEA 12 now works as a lightsaber sword, as a weapon of a Jedi Knight, which you can trust in Java world!
`

Features

* Requires tmpfs, bash, fstab, rsync, memory :)
* Usually, all requirements are available in many Unix flavors
* SystemD
* Service
* Timer
* Suspend
* RAM disk to HDD
* Linux for sure, easy to extend for Unix, BSD, macOS
* Should might need some tuning, but the functions are there, I just only tested in Linux.

Intel Optane

I think my ramdisk is faster. Ciao!!! (:

Use case

Speed up IntelliJ and development Node. (Tons of files.)
The result is that the development is many folds faster. No waiting at all.

Changelog

* Since v2019.2.1, BREAKING CHANGELOG

Install

Warning

Do not use the `$USER` variable, use the actual username, like `p3x-robot`.

So actual install

`text
patrikx3@workstation ~ $ p3x-ramdisk install --help

Usage: install [options]


Install a p3x-ramdisk


Options:

-h, --help output usage information
-r, --rampath [path] The path of the ram disk, default /home/{{USER}}/ramdisk
-p, --persistent [path] The path of the ram persistent, default /home/{{USER}}/ramdisk-persistent
-g, --gid [group] The gid, it you omit it is the current user
-t, --timer [minutes] The timer in minutes, minimum about 10 minutes, Default is 20 minutes, the best
-s, --size [megabytes] Ramdisk in size of megabytes, default is 4096 megabytes
`

IMPORTANT

Trash is disabled in GNOME with p3x-ramdisk. It will ask for confirm to delete data.
You might have it in the previous save. It is possible to enable trash bin, but for me is not important now, so I disabled, memory is not cheap.

Setup

Use GitHub for info, NPM hides wide strings.

https://github.com/patrikx3/ramdisk

`bash


of course your data will never be deleted,

double persistence (current, previouse, saves every 20 minutes)

load on boot, plus at shutdown and suspend it saves

sudo npm install -g p3x-ramdisk --unsafe-perm=true --allow-root

install

if you need less/more memory, add -s 1024 or even more, 10GB is good :)

sudo p3x-ramdisk install {{USER}}

Get the output, add to /etc/fstab

echo "tmpfs /home/{{USER}}/ramdisk tmpfs gid=10000,uid=10000,size=4096M 0 0" | sudo tee -a /etc/fstab
sudo mount -a

you should verify the ramdisk is existing now, you might have to reboot

on linux it can show your settings, like below:

df -h

if there is an error, you can

sudo p3x-ramdisk stop {{USER}}

if all good

STARTUP THE RAMDISK PERSISTENT

sudo p3x-ramdisk start {{USER}}

you can work like here (this a symlink, so you can't accidentally delete

so next time boot, it will re-create the symlink ...)

/home/{{USER}}/ramdisk/p3x-persistence

SOME DEBUG

p3x-ramdisk watch {{USER}}

to trigger a savs

p3x-ramdisk save {{USER}}

you don't need usually to save

the default is 20 minutes

the systemd service saves on suspend and shutdown

to stop the services

removes sync, so the ramdisk files will be unavailable,

only be in /home/username/ramdisk-persistent/current

sudo p3x-ramdisk stop {{USER}}

your duplicate copies are

ls -all /home/{{USER}}/ramdisk-persistent/current/
ls -all /home/{{USER}}/ramdisk-persistent/previous/

you are done

the default use case is to speed up working with IntelliJ and my projects to ramdisk

if you just want persistent folder and that's all

there is a special folder, .p3x-ramdisk-link

everything there is linked into /home/{{USER}}

if there is nothing in .p3x-ramdisk-link

no linking is. to test it, you might not need it.

`

Linkin' in /home

`bash


$3

LINKING - IS NOT REQUIRED, but is good as a sword :)

p3x-ramdisk save {{USER}}
sudo p3x-ramdisk stop {{USER}}
mkdir -p /home/{{USER}}/ramdisk-persistent/current/.p3x-ramdisk-link

cp -avr /home/{{USER}}/.IntelliJIdea2019.2 /home/{{USER}}/ramdisk-persistent/current/.p3x-ramdisk-link

backup

mkdir -p /home/{{USER}}/backup
mv /home/{{USER}}/.IntelliJIdea2019.2 /home/{{USER}}/backup/

need to delete the originals, since they become symlinks

rm -rf /home/{{USER}}/.IntelliJIdea2019.2

ln -s /home/{{USER}}/ramdisk-persistent/current/.p3x-ramdisk-link/.IntelliJIdea2019.2 /home/{{USER}}/.IntelliJIdea2019.2

sudo p3x-ramdisk start {{USER}}

$3

`

Output

Install

`text
patrikx3@laptop:~/ramdisk/.p3x-ramdik-persistence/content/.p3x-ramdisk-link/Projects/patrikx3/ramdisk$ sudo p3x-ramdisk install patrikx3 -s 6144
2018-05-08 00:30:08: terminal install

2018-05-08 00:30:08: terminal copy

2018-05-08 00:30:08: terminal suspend

2018-05-08 00:30:08: terminal reload services

2018-05-08 00:30:08: terminal install done

Settings: {
"rampath": "ramdisk",
"persistent": "ramdisk-persistent",
"uid": "patrikx3",
"uidNumber": 10000,
"gid": "patrikx3",
"timer": 20,
"size": "4096",
"home": "/home/patrikx3",
"script": "/home/patrikx3/.p3x-ramdisk"
}

Final commands:
--------------------------
1) You only have to do it once, if you haven't done it before

echo "tmpfs /home/patrikx3/ramdisk tmpfs gid=10000,uid=10000,size=4096M 0 0" | sudo tee -a /etc/fstab
sudo mount -a

--------------------------
2) verify that ramdisk is working, see it here

df -h

--------------------------
3) if everything is ok, start the persistent ramdisk

sudo p3x-ramdisk start {{USER}}

patrikx3@laptop:~/ramdisk/.p3x-ramdik-persistence/content/.p3x-ramdisk-link/Projects/patrikx3/ramdisk$
`

Watching the RAM disk

`bash
p3x-ramdisk watch {{USER}}
`

`text
Filesystem Size Used Avail Use% Mounted on
tmpfs 4,0G 2,0G 2,1G 50% /home/patrikx3/ramdisk

total used free shared buff/cache available
Mem: 31G 3,3G 18G 2,0G 9,8G 25G
Swap: 8,0G 0B 8,0G


Load: 2018-05-27 09:01:49 2018-05-27 09:01:56 0 minutes 7 seconds
Save: 2018-05-27 09:20:00 2018-05-27 09:20:16 0 minutes 16 seconds

2018-05-27 09:20:00: timer save, ramdisk to current
2018-05-27 09:20:00: timer save /home/patrikx3/ramdisk/.p3x-ramdik-persistence/content to /home/patrikx3/ramdisk-persistent/current
2018-05-27 09:20:16: timer saved
2018-05-27 09:20:16: timer save done
2018-05-27 09:20:16: timer 0 minutes 16 seconds

5/27/2018, 9:24:45 AM | Persistence 20 minutes | Watch 1 second
`

LOGS

` /home/{{USER}}/ramdisk-persistent/ramdisk-persistent.log `
` /home/{{USER}}/ramdisk-persistent/update-at-load.log `
` /home/{{USER}}/ramdisk-persistent/update-at-save.log `




LOG info

`text
2018-05-06 02:57:37: boot loading
2018-05-06 02:57:37: boot load /home/patrikx3/ramdisk-persistent/current to /home/patrikx3/ramdisk/.p3x-ramdik-persistence/content
2018-05-06 02:57:47: boot loaded
2018-05-06 02:57:47: boot link
2018-05-06 02:57:47: boot link /home/patrikx3/ramdisk/.p3x-ramdisk-persistence/content/.IntelliJIdea2018.3 to /home/patrikx3/.IntelliJIdea2018.3
2018-05-06 02:57:47: boot link /home/patrikx3/ramdisk/.p3x-ramdisk-persistence/content/Projects to /home/patrikx3/Projects
2018-05-06 02:57:47: boot link done
2018-05-06 02:57:47: boot 0 minutes 10 seconds

2018-05-06 02:57:47: timer save
2018-05-06 02:57:47: timer save, current to previous
2018-05-06 02:57:47: timer save /home/patrikx3/ramdisk-persistent/current to /home/patrikx3/ramdisk-persistent/previous
2018-05-06 02:57:50: timer saved
2018-05-06 02:57:50: timer save, ramdisk to current
2018-05-06 02:57:50: timer save /home/patrikx3/ramdisk/.p3x-ramdisk-persistence/content to /home/patrikx3/ramdisk-persistent/current
2018-05-06 02:57:53: timer saved
2018-05-06 02:57:53: timer save done
2018-05-06 02:57:53: timer 0 minutes 6 seconds
`

LOG Update

`text
2018-05-06 03:31:51
2018-05-06 03:31:57
0 minutes 6 seconds
`

Thunder ramdisk persistence


`text
patrikx3@workstation ~/ramdisk-persistent/current/.p3x-ramdisk-link $ ll
total 32
drwxr-xr-x 8 patrikx3 patrikx3 4096 May 7 13:04 ./
drwxr-xr-x 3 patrikx3 patrikx3 4096 May 7 13:02 ../
drwxr-xr-x 4 patrikx3 patrikx3 4096 Apr 25 17:51 .IntelliJIdea2018.3/
patrikx3@workstation ~/ramdisk-persistent/current/.p3x-ramdisk-link $
``

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$3

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Version Structure: We follow a Major.Minor.Patch versioning scheme:
- Major: 📅 Corresponds to the current year.
- Minor: 🌓 Set as 4 for releases from January to June, and 10 for July to December.
- Patch: 🔧 Incremental, updated with each build.

🚨 Important Changes: Any breaking changes are prominently noted in the readme to keep you informed.

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P3X-RAMDISK Build v2025.4.121

   

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