All Questions
24
questions
0
votes
2
answers
656
views
Backup strategy: from ext4 to btrfs. Is it any good?
I have all my data stored on an ext4 filesystem. I want to make regular backups to a btrfs drive and use its snapshot capabilities.
In the btrfs drive I will make two directories: \backup and \...
- 63
0
votes
0
answers
157
views
Btrfs local Snapshots vs Incremental remote Backup
In a NAS context, I'm wondering about the pros of btrfs local snapshots when incremental remote backup is made on a remote server.
I'm also wondering about the interest to have both snapshots and ...
- 161
0
votes
2
answers
281
views
btrfs receive fails with incremental streams: "File exists"
For a btrfs sub-volume, I have a simple incremental backup created from two stages:
btrfs send old/@ > base.btrfs
btrfs send new/@ -p old/@ > update.btrfs
The two source sub-volumes are ...
- 225
0
votes
1
answer
3k
views
removing old BTRFS snapshots with bash
I'm trying to build my own little backup script, I want to use BTRFS snapshots and keep them for a while. Meanwhile, creating the snapshots is no longer a problem for me, but now I would like to ...
- 104
1
vote
1
answer
625
views
How to delete all duplicates of a file linked by CoW on BTRFS
The glory of Copy-on-Write (CoW) allows us to copy a file as many times as we like, without duplicating the used space.
I have used this functionality extensively (as well as manual deduplication of ...
- 111
5
votes
1
answer
4k
views
btrfs check / scrub: what is the difference?
I am going to use (for now) btrfs on a couple of external USB HDD archives, in single-mode (no DUP, no RAID, no nothing; I will just keep it simple for now). So my idea is that I have two (manually ...
- 115
2
votes
1
answer
2k
views
Is this a correct BTRFS incremental backup strategy?
Assuming /home is my BTRFS partition (to keep backups of) & /storage as my secondary disk (to store backups on), will this work?
Initial Backup (8th Sept 2020):
btrfs subvolume snapshot -r /home /...
- 143
0
votes
0
answers
348
views
Urbackup unable to use btrfs partition
I'm trying to get urbackup 2.4.9.0 to work on Ubuntu 19.10 x86.
I have a 2T usb drive partitioned as btrfs, but it's not recognized as btrfs by urbackup_snapshot_helper.
/etc/urbackup/backupfolder ...
- 221
3
votes
2
answers
6k
views
btrfs: imaging a volume to an external file
I recently built a system with a btrfs root partition. The most compelling reason for adopting btrfs compared to ext4, in my case, was live copy-on-write snapshots, with near-zero latency. Compared ...
- 225
8
votes
1
answer
5k
views
How to use BTRFS for RAID between a SSD and a larger HDD?
My PC has a SSD for the root filesystem and the home directory and a large HDD for other data. From time to time I sync the SSD content to the HDD in case the SSD fails. The HDD has a separate backup.
...
- 1,158
0
votes
3
answers
2k
views
Test if btrfs subvolume exists
I have a problem in a bash procedure, which should port my old rsync disk backup (and archive) to my future btrfs snapshot backup.
I want to use the line:
# btrfs subvolume snapshot /targetdir/@...
- 103
3
votes
0
answers
395
views
Creating a backup system with btrfs deduplication
I'm thinking about making my own archive/backup solution. This sounds like a bad idea, but I can't see another way to meet my requirements.
I have three Windows PCs I'd like to backup. They contain ...
- 1,719
1
vote
1
answer
3k
views
How to get NTFS like snapshot behaviour in BTRFS?
I would like to use BTRFS to host VMs in VirtualBox to be able to use Snapshots without LVM or such. In theory I don't need CoW behaviour all the time because of performance reasons and using ...
2
votes
0
answers
532
views
What does btrfs do after a snapshot differental is transferred? (buttersink)
I am not sure how specific I should be in my question, so I'll ask a general question according to the title first that aims at where I think the issue is, and then describe the overall situation, in ...
- 123
1
vote
1
answer
71
views
Will renaming a folder that is rsynced to a BTRFS volume and snapshotted there double the space necessary?
I have a setup where I'm backing up a bunch of folders via rsync to an external server onto a BTRFS volume and regularly snapshotting the volume to be able to access different points in time of my ...
- 334