Some metrics about redpesk OS

Image size

Here are some characteristics of the redpesk OS images you will generally find:

  • Packages number :
    • generic images : ~ 430
    • Custom aarch64 BSP : ~ 380
  • Estimated image size :
    • generic images :
      • x86_64 : ~ 316 MB
      • aarch64: ~ 524 MB
    • Custom aarch64 BSP : ~ 275 MB

Please note that we have some recommendations on things to do for reducing redpesk OS image’s size.

Boot time

  • Minimal redpesk OS image: ~ 2-15s (with bootloader)
    • Measures detailed on the dedicated page here.
  • Default redpesk OS boot sequence: ~ 10-15s (with bootloader)
    • Boot example within QEMU of redpesk OS batz-2.1-update (x86_64) : 
        [root@localhost ~]# systemd-analyze 
  Startup finished in 947ms (kernel) + 1.358s (initrd) + 7.589s (userspace) = 9.896s 
  multi-user.target reached after 2.635s in userspace.
    • Boot example on Solidrun Solidsense Compact N8 using redpesk OS batz-2.1-update (aarch64) : 
        Startup finished in 2.949s (kernel) + 14.013s (userspace) = 16.963s
  multi-user.target reached after 12.716s in userspace

Obviously this may change depending on your application needs, your systemd services, bootloader configuration, hardware, etc.

Please note that we have some recommendations on things to do for optimizing redpesk OS boot time.

Partitioning

  • A redpesk OS is made with some « default partitions » that are mandatory, others optional:
Partition name Size (MB) *** Mount point Writable ? Needed ?
Boot 200 /boot RO * Mandatory
Persistent Configuration 50 /config RW Optional **
Recovery Data 500 /recovery RO Optional **
Root File System 2700 / RO * Mandatory
User Data 500 /data
 RW Optional **

NOTES:

Data are a mean of all boards images and took from redpesk OS arz-1.1.0.

* : For development purpose, partition is let as RW. RO should be enabled but it is NOT by default.

** : Mentioned partition can be removed depending on user’s needs (and disabled features). See custom image creation documentation.

***: Image size is 3950 MB by default to fit 4GB MMC/SD card size but could be downsized to 2 GB without disabling features. For smaller image size, please contact the support team. Default root password is root. This can be changed within the kickstart. See section “modify the root password” in documentation.