From: Roman Mamedov <rm@romanrm.net>
To: Ulli Horlacher <framstag@rus.uni-stuttgart.de>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: netapp-alike snapshots?
Date: Tue, 22 Aug 2017 21:45:31 +0500 [thread overview]
Message-ID: <20170822214531.44538589@natsu> (raw)
In-Reply-To: <20170822142451.GI14804@rus.uni-stuttgart.de>
On Tue, 22 Aug 2017 16:24:51 +0200
Ulli Horlacher <framstag@rus.uni-stuttgart.de> wrote:
> On Tue 2017-08-22 (15:44), Peter Becker wrote:
> > Is use: https://github.com/jf647/btrfs-snap
> >
> > 2017-08-22 15:22 GMT+02:00 Ulli Horlacher <framstag@rus.uni-stuttgart.de>:
> > > With Netapp/waffle you have automatic hourly/daily/weekly snapshots.
> > > You can find these snapshots in every local directory (readonly).
> > > Example:
> > >
> > > framstag@fex:/sw/share: ll .snapshot/
> > > drwxr-xr-x framstag root - 2017-08-14 10:21:47 .snapshot/daily.2017-08-15_0010
> > > drwxr-xr-x framstag root - 2017-08-14 10:21:47 .snapshot/daily.2017-08-16_0010
> > > drwxr-xr-x framstag root - 2017-08-14 10:21:47 .snapshot/daily.2017-08-17_0010
> > > drwxr-xr-x framstag root - 2017-08-14 10:21:47 .snapshot/daily.2017-08-18_0010
> > > drwxr-xr-x framstag root - 2017-08-18 23:59:29 .snapshot/daily.2017-08-19_0010
> > > drwxr-xr-x framstag root - 2017-08-19 21:01:25 .snapshot/daily.2017-08-20_0010
> > > drwxr-xr-x framstag root - 2017-08-20 19:48:40 .snapshot/daily.2017-08-21_0010
> > > drwxr-xr-x framstag root - 2017-08-20 02:50:18 .snapshot/hourly.2017-08-20_1210
> > > drwxr-xr-x framstag root - 2017-08-20 02:50:18 .snapshot/hourly.2017-08-20_1610
> > > drwxr-xr-x framstag root - 2017-08-20 19:48:40 .snapshot/hourly.2017-08-20_2010
> > > drwxr-xr-x framstag root - 2017-08-21 00:42:28 .snapshot/hourly.2017-08-21_0810
> > > drwxr-xr-x framstag root - 2017-08-21 00:42:28 .snapshot/hourly.2017-08-21_1210
> > > drwxr-xr-x framstag root - 2017-08-21 13:05:28 .snapshot/hourly.2017-08-21_1610
>
> btrfs-snap does not create local .snapshot/ sub-directories, but saves the
> snapshots in the toplevel root volume directory.
It is beneficial to not have snapshots in-place. With a local directory of
snapshots, issuing things like "find", "grep -r" or even "du" will take an
inordinate amount of time and will produce a result you do not expect.
For some of those tools the problem can be avoided (by always keeping in mind
to use "-x" with du, or "--one-file-system" with tar), but not for all of them.
Personally I prefer to have a /snapshots directory on every FS, and e.g. timed
snapshots of /home/username/src will live in /snapshots/home-username-src/. No
point to hide it there with a dot either, as it's convenient to be able to
browse older snapshots with GUI filemanagers (which hide dot-files by default).
--
With respect,
Roman
next prev parent reply other threads:[~2017-08-22 16:45 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-22 13:22 netapp-alike snapshots? Ulli Horlacher
2017-08-22 13:44 ` Peter Becker
2017-08-22 14:24 ` Ulli Horlacher
2017-08-22 16:08 ` Peter Becker
2017-08-22 16:48 ` Ulli Horlacher
2017-08-22 16:45 ` Roman Mamedov [this message]
2017-08-22 16:57 ` Ulli Horlacher
2017-08-22 17:19 ` A L
2017-08-22 18:01 ` Ulli Horlacher
2017-08-22 18:36 ` Peter Grandi
2017-08-22 20:48 ` Ulli Horlacher
2017-08-23 7:18 ` number of subvolumes Ulli Horlacher
2017-08-23 8:37 ` A L
2017-08-23 16:48 ` Ferry Toth
2017-08-24 17:45 ` Peter Grandi
2017-08-31 6:49 ` Ulli Horlacher
2017-08-31 11:18 ` Austin S. Hemmelgarn
2017-08-31 14:38 ` Michał Sokołowski
2017-08-31 16:18 ` Duncan
2017-09-01 10:21 ` ein
2017-09-01 11:47 ` Austin S. Hemmelgarn
2017-08-24 19:40 ` Marat Khalili
2017-08-24 21:56 ` Ferry Toth
2017-08-25 5:54 ` Chris Murphy
2017-08-25 11:45 ` Austin S. Hemmelgarn
2017-08-25 12:55 ` Ferry Toth
2017-08-25 19:18 ` Austin S. Hemmelgarn
2017-08-23 12:11 ` Peter Grandi
2017-08-22 21:53 ` user snapshots Ulli Horlacher
2017-08-23 6:28 ` Dmitrii Tcvetkov
2017-08-23 7:16 ` Dmitrii Tcvetkov
2017-08-23 7:20 ` Ulli Horlacher
2017-08-23 11:42 ` Peter Grandi
2017-08-23 21:13 ` Ulli Horlacher
2017-08-25 11:28 ` Austin S. Hemmelgarn
2017-08-22 17:36 ` netapp-alike snapshots? Roman Mamedov
2017-08-22 18:10 ` Ulli Horlacher
2017-09-09 13:26 ` Ulli Horlacher
2017-09-09 13:36 ` Marc MERLIN
2017-09-09 13:44 ` Ulli Horlacher
2017-09-09 19:43 ` Andrei Borzenkov
2017-09-09 19:52 ` Ulli Horlacher
2017-09-10 7:10 ` A L
2017-09-10 14:54 ` Marc MERLIN
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170822214531.44538589@natsu \
--to=rm@romanrm.net \
--cc=framstag@rus.uni-stuttgart.de \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.