Btrfs Snapshot Disk Usage Analyzer
This tool can show you what folders have the most changed data between
snapshots. Simply run:
btsdu -p /snapshots/old_snapshot /snapshots/new_snapshot
You will get a navigable breakdown in a NCDu
interface.
ncdu 1.13 ~ Use the arrow keys to navigate, press ? for help
--- /home/roman ---------------------------------------------------
/..
42.5 MiB [##########] /.config
23.2 MiB [##### ] /.IdeaIC2017.2
12.3 MiB [## ] /.vscode
10.0 MiB [## ] /projects
9.5 MiB [## ] /.thunderbird
297.3 KiB [ ] /.local
20.0 KiB [ ] /.java
e 8.0 KiB [ ] /.bash_history
4.0 KiB [ ] /.pulse
e 293.0 B [ ] /.bashrc
Use the Rust package manager, cargo
:
cargo install btsdu
If the cargo bin
directory is in your path, you can run `btsdu right away. You
will also need NCDu (should be packaged by your distribution) for proper display
of the results.
The tools uses btrfs send
to get difference between two snapshots and then
builds up file-by-file summary of the size of changed data. The output is
printed in format understood by the NCDu display tool.
Naturally it is possible to use a a btrfs send/receive stream dump from your own
source, see --help
for that. It is also possible not to run NCDu and just show
the underlying data. It is in pretty reasonable JSON format that can be
processed further.