Nightingale Posing Mischievously


    2022.4.101 • Public • Published


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    💾 Linux RAM disk persistent with Systemd timer, service and suspend v2022.4.101

    Bugs are evident™ - MATRIX️

    NodeJS LTS is supported

    Built on NodeJs version



    Breaking change



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

    IntelliJ Speed

    Based on:

    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! 


    • 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.




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

    So actual install

    patrikx3@workstation ~ $ p3x-ramdisk install --help
      Usage: install [options] <uid>
    Install a p3x-ramdisk    
        -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


    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.


    Use GitHub for info, NPM hides wide strings.

    # 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
    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
    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

    # 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}}
    ### //LINKING:END



    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}}

    Watching the RAM disk

    p3x-ramdisk watch {{USER}}
    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



    LOG info

    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

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

    Thunder ramdisk persistence

    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 $ 

    🙏 This is an open-source project. Star this repository, if you like it, or even donate to maintain the servers and the development. Thank you so much!

    Possible, this server, rarely, is down, please, hang on for 15-30 minutes and the server will be back up.

    All my domains ( and could have minor errors, since I am developing in my free time. However, it is usually stable.

    Note about versioning: Versions are cut in Major.Minor.Patch schema. Major is always the current year. Minor is either 4 (January - June) or 10 (July - December). Patch is incremental by every build. If there is a breaking change, it should be noted in the readme.

    P3X-RAMDISK Build v2022.4.101

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