On Tue, 2015-11-24 at 15:58 -0500, Austin S Hemmelgarn wrote: > I had tried using send/receive once with -p, but had numerous issues. > The incrementals I've been doing have used -c instead, and I hadn't had > any issues with data loss with that. The issue outlined here was only a > small part of why I stopped using it for backups. The main reason was > to provide better consistency between my local copies and what I upload > to S3/Dropbox, meaning I only have to test one back up image per > filesystem backed-up, instead of two.
Okay maybe I just don't understand how to use send/receive correctly... What I have is about the following (simplified): master-fs: 5 | +--data (subvol, my precious data) | +--snapshots | +--2015-11-01 (suvol, ro-snapshot of /data) So 2015-11-01 is basically the first snapshot ever made. Now I want to have it on: backup-fs +--2015-11-01 (suvol, ro-snapshot of /data) So far I did btrfs send /master-fs/snapshots/2015-11-01 | btrfs receive /backup-fs/2015-11-01 Then time goes by and I get new content in the data subvol, so what I'd like to have then is a new snapshot on the master-fs: 5 | +--data (subvol, more of my precious data) | +--snapshots | +--2015-11-01 (suvol, ro-snapshot of /data) +--2015-11-20 (suvol, ro-snapshot of /data) And this should go incrementally on backup-fs: backup-fs +--2015-11-01 (suvol, ro-snapshot of /data) +--2015-11-20 (suvol, ro-snapshot of /data) So far I used something like: btrfs send -p 2015-11-01 /master-fs/snapshots/2015-11-20 | btrfs receive /backup-fs/2015-11-20 And obviously I want it to share all the ref-links and stuf... So in other words, what's the difference between -p and -c? :D Thx, Chris.
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