In addition to the questions below, if anyone has a chance could you advise on
why my destination drive has more data than the source after this command:
# rsync --hard-links --delete --inplace --archive --numeric-ids /media/disk/*
/home
sending incremental file list
sent 658660 bytes received 2433 bytes 1322186.00 bytes/sec
total size is 1355368091626 speedup is 2050192.77
# df /media/disk
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md2 1868468340 1315408384 553059956 71% /media/disk
# df /home
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdb 3907029168 1325491836 2581537332 34% /home
On Fri 07 January 2011 10:55:43 Carl Cook wrote:
>
> Wow, this rsync and backup system is pretty amazing. I've always just tarred
> each directory manually, but now find I can RELIABLY automate backups, and
> have SOLID versioning to boot. Thanks to everyone who advised, especially
> Freddie and Anthony.
>
> I am still waiting for hardware for my backup server, but have been
> preparing. On the backup server I'll be doing pull backups for everything
> except my phone (which is connected intermittently). I'm going to set up a
> cron script on the backup server to pull backups once a week (as opposed to
> once/mo which I've done for 12 years). I am at a loss how to to lock the
> database on the HTPC while exporting the dump, as per Lloyd Standish, but
> will study it. (Freddie gave a nice script, but it doesn't seem to
> lock/flush first) Also don't know how to email results/success/fail on
> completion, as I've not a very good coder.
>
> But here is my proposed cron:
> btrfs subvolume snapshot hex:///home /media/backups/snapshots/hex-{DATE}
> rsync --archive --hard-links --delete-during --delete-excluded --inplace
> --numeric-ids -e ssh --exclude-from=/media/backups/exclude-hex hex:///home
> /media/backups/hex
> btrfs subvolume snapshot droog:///home /media/backups/snapshots/droog-{DATE}
> rsync --archive --hard-links --delete-during --delete-excluded --inplace
> --numeric-ids -e ssh --exclude-from=/media/backups/exclude-droog
> droog:///home /media/backups/droog
>
> My root filesystems are ext4, so I guess they cannot be snapshotted before
> backup. My home directories are/will be BTRFS though.
>
>
> On Fri 07 January 2011 08:14:17 Hubert Kario wrote:
> >> I'd suggest at least
> >> mkfs.btrfs -m raid1 -d raid0 /dev/sdc /dev/sdd
> >> if you really want raid0
> >
> > I don't fully understand -m or -d. Why would this make a truer raid0 that
> > with no options?
>
> I am beginning to suspect that this is the -default- behavior, as described
> in the wiki:
> "# Create a filesystem across four drives (metadata mirrored, data striped)"
>
> Should I turn off the writeback cache on each drive when running BTRFS?
>
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