Linux How To Create A RamDisk

size = the amount of RAM (m for megabytes)

/mnt/ram = the mount location of the ram disk (change to the path you want it mounted to)

mount -t tmpfs -o size=4096m tmpfs /mnt/ram/
 

Example test in an old server:

You can see that when reading if you don't specify bs1=M the read speeds are several times slower (eg. 450MB/s vs 2.1GB/s)

mount -t tmpfs -o size=4096m tmpfs /mnt/ram/^C
root@testserver:~# dd if=/dev/zero of=/mnt/ram/testhere bs=1M count=3000
3000+0 records in
3000+0 records out
3145728000 bytes (3.1 GB, 2.9 GiB) copied, 2.51162 s, 1.3 GB/s
root@testserver:~# dd if=/dev/mnt/ram^C
root@testserver:~# dd if=/mnt/ram/testhere of=/dev/null
6144000+0 records in
6144000+0 records out
3145728000 bytes (3.1 GB, 2.9 GiB) copied, 6.99788 s, 450 MB/s
root@testserver:~# dd if=/mnt/ram/testfile of=/dev/null
dd: failed to open '/mnt/ram/testfile': No such file or directory
root@testserver:~# dd if=/mnt/ram/testhere
testhere
root@testserver:~# dd if=/mnt/ram/testhere of=/dev/null
6144000+0 records in
6144000+0 records out
3145728000 bytes (3.1 GB, 2.9 GiB) copied, 6.94865 s, 453 MB/s
root@testserver:~# dd if=/mnt/ram/testhere of=/dev/null bs=1M
3000+0 records in
3000+0 records out
3145728000 bytes (3.1 GB, 2.9 GiB) copied, 1.49836 s, 2.1 GB/s


Tags:

linux, ramdisksize, ram, megabytes, mnt, mount, disk, mounted, tmpfs,

Latest Articles

  • ssh Too many authentication failures not prompting for password
  • LightDM Mint Ubuntu Debian won't start errors Nvidia Graphics
  • WARNING: Unable to determine the path to install the libglvnd EGL vendor library config files. Check that you have pkg-config and the libglvnd development libraries installed, or specify a path with --glvnd-egl-config-path. Linux Ubuntu Mint Debian E
  • How To Upgrade Linux Mint 18.2 to 18.3 to 19.x and 20.x
  • MP3s Won't Play / ID3 Version 2.4 Issues in Cars and Other MP3 Players/CDs/DVDs Solution
  • LXC Containers LXD How to Install and Configure Tutorial Ubuntu Debian Mint
  • GlusterFS HowTo Tutorial For Distributed Storage in Docker, Kubernetes, LXC, KVM, Proxmox
  • Ubuntu Mint audio output not working pulseaudio "pulseaudio[13710]: [pulseaudio] sink-input.c: Failed to create sink input: too many inputs per sink."
  • How To Shrink Dynamically Allocated VM QEMU KVM VMware Disk Image File
  • How To Enable Linux Swapfile Instead of Partition Ubuntu Mint Debian Centos
  • 404 Not Found [IP: 151.101.194.132 80] apt update Debian 11 Bullseye Solution The repository 'http://security.debian.org bullseye/updates Release' does not have a Release file.
  • WARNING: Can't download daily.cvd from db.local.clamav.net freshclam clamav error solution
  • (firefox:9562): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Failed to execute child process "dbus-launch" (No such file or directory) Solution
  • Debian Mint Ubuntu Which Package Provides missing top, ps and w Solution
  • Vbox Virtualbox DNS NAT Network Mode NOT working
  • Docker Tutorial HowTo Install Docker, Use and Create Docker Container Images Clustering Swarm Mode Monitoring Service Hosting Provider
  • Zoom Password Error 'That passcode was incorrect' - Solution Wrong Passcode Wrong Meeting Name
  • How To Startup and Open Remote/Local Folder/Directory in Ubuntu Linux Mint automatically upon login
  • How To Reset Windows Server Password 2019, 2022, 7, 8, 10, 11 Recovery and Removal Guide Using Linux Ubuntu Mint Debian
  • How To Create OpenVPN Server for Secure Remote Corporate Access in Linux Debian/Mint/Ubuntu with client public key authentication