Category: btrfs

btrfs, kernel, linux

Understanding disk usage in Linux

How much space is this file taking from my hard drive? How much free space do I have? How many more files can I fit in the remaining free space? The answer to these questions seems obvious. We all have an instinctive understanding of how filesystems work, and we often picture storing files in disk …

btrfs, linux, OYB software, shell

Easy sync BTRFS snapshots with btrfs-sync

To complement the last BTRFS tool btrfs-snp (which allows us to schedule snapshots), I would like to share a new tool to synchronize them locally or remotely¬† to achieve efficient data redundancy. With btrfs-snp we can replicate our BTRFS snapshots in a different BTRFS system, and have a second copy of our versioned subvolume in …

btrfs, linux, OYB software, shell

Schedule BTRFS snapshots with btrfs-snp

To complement the last BTRFS tool btrfs-du, I would like to share a simple script for creating BTRFS snapshots that plays well with cron and systemd timers. This allows us to easily automate snapshot creation. I was inspired by btrfs-snap by Birger Monsen. Usage btrfs-snp can be run manually, or summoned from cron. Invoke without …

btrfs, linux, OYB software, shell

Check disk space of your BTRFS snapshots with btrfs-du

Today I want to share a simple way to check the state of our BTRFS snapshots. Usage

If path is omitted, it will default to / . We can list easily our snapshots, plus have a clear view of how much data they have in common and how much total overhead are we holding. …