Boot time of 25 minutes due to fragmentation of monero blockchain [solved]

[rustybird]

@scallyob

May 29 21:30:33 dom0 systemd[1]: Starting Qubes OS daemon...
May 29 21:35:06 dom0 qubesd[1974]: Reflinked file: '/var/lib/qubes/appvms/crypto/private.img' -> '/var/lib/qubes/appvms/crypto/private.img.44@2023-05-30T03:56:38Z~j3nypgxl'
May 29 21:35:09 dom0 qubesd[1974]: Renamed file: '/var/lib/qubes/appvms/crypto/private.img.44@2023-05-30T03:56:38Z~j3nypgxl' -> '/var/lib/qubes/appvms/crypto/private.img.44@2023-05-30T03:56:38Z'
May 29 21:40:01 dom0 qubesd[1974]: Removed file: '/var/lib/qubes/appvms/crypto/private.img.43@2023-05-22T21:55:43Z'
May 29 21:43:12 dom0 qubesd[1974]: Renamed file: '/var/lib/qubes/appvms/crypto/private-dirty.img' -> '/var/lib/qubes/appvms/crypto/private.img'
May 29 21:47:51 dom0 qubesd[1974]: Reflinked file: '/var/lib/qubes/appvms/crypto/private.img' -> '/var/lib/qubes/appvms/crypto/private-precache.img~4z4crrsi'
May 29 21:47:54 dom0 qubesd[1974]: Renamed file: '/var/lib/qubes/appvms/crypto/private-precache.img~4z4crrsi' -> '/var/lib/qubes/appvms/crypto/private-precache.img'
May 29 21:47:54 dom0 systemd[1]: Started Qubes OS daemon.

Probably a monstrously fragmented volume file, try sudo filefrag /var/lib/qubes/appvms/crypto/private.img to see. Full node blockchain implementations and especially monerod can be terrible!

I’ve been meaning to write up how to defragment file-reflink volumes on Btrfs. I’m not very familiar with XFS, although if you temporarily have enough free disk space in dom0 I guess you could shut down the VM, wait for its private-dirty.img to disappear, delete the @ revision .img files and private-precache.img, then cp --sparse=always --reflink=never private.img to a new file, and rename the copy to the original file name.