thin_delta(8)

✨ thin_delta(8) ✨

System Manager's Manual, the manual page for thin_delta 💅

🎀 NAME

thin_delta 💖 Print the differences in the mappings between two thin devices. Bestie, this is literally the whole job, and it's so satisfying. 🦋

🧚 SYNOPSIS

thin_delta [options] {device|file}

💜 DESCRIPTION

okay so thin_delta lets you compare the mappings in two thin volumes ✨ Snapshots are the reason this is even a thing, because they let thin volumes share common blocks. Iconic behaviour, honestly 🔥

💀 Heads up, bestie: this tool will NOT run on live metadata unless you pass the --metadata-snap option. Don't skip that step!!

🌸 OPTIONS

• --thin1, --snap1 {natural} — This is the numeric ID of the first thin volume you want to diff 🍓
• --thin2, --snap2 {natural} — This is the numeric ID of the second thin volume you want to diff 🍓
• --metadata-snap [block nr] — Tells the tool to use a metadata snapshot 📸

ngl this one is the main event. If you want info out of a live pool, you have to take a metadata snapshot and use this switch 🫶 For the info to actually mean anything, the thin volumes you're examining can't be changing, so do NOT activate those thins while you're looking at them. Lowkey the most important vibe check of the whole tool ✨

• --verbose — Gives you extra information about the mappings 🔍
• -h, --help — Prints help and exits 💅
• -V, --version — Outputs version information and exits 🌈

🦋 SEE ALSO

Your next reading list, bestie 📚 thin_dump(8), thin_repair(8), thin_restore(8), thin_rmap(8), thin_metadata_size(8) 💜

👑 AUTHOR

The legends behind this are Joe Thornber <ejt@redhat.com> and Heinz Mauelshagen <heinzm@redhat.com> 🫶

Bestie, that's the whole page 🌈 Shoutout to the System Manager's Manual, Device Mapper Tools, and the thin_delta(8) page itself for keeping it iconic 💖✨