Re: Live Fille System Backup

From	<tomas@tuxteam.de>
Newsgroups	linux.debian.user
Subject	Re: Live Fille System Backup
Date	2017-05-09 14:30 +0200
Message-ID	<tFcr8-1Fu-23@gated-at.bofh.it> (permalink)
References	(5 earlier) <tEZDz-1zC-5@gated-at.bofh.it> <tEZWV-1Vv-9@gated-at.bofh.it> <tF8dQ-7bU-15@gated-at.bofh.it> <tFc7L-1x6-11@gated-at.bofh.it> <tFc7L-1x6-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, May 09, 2017 at 08:08:48AM -0400, Greg Wooledge wrote:

[...]

> So, basically the same as LVM snapshots, which are independent of the
> type of file system that sits on the LVM logical volume.

To be fair, btrfs knows about the file system, whereas LVM does COW
on the underlying "dumb" block device. Thus btrfs is capable of
squeezing quite a bit out in terms of better performance/lower disk
usage.

For some workloads it matters, for others not (the use case I posited,
freezing a snapshot while rsyncing, might tend to fall on the "not"
side *if* you are a bit careful and *if* your write load isn't insane).

> But btrfs is an edge with more blood on it, so people are naturally
> drawn to it.  It's also more complicated.  So it's *got* to be better!!!
> 
> > I don't know what an atomic cow is (maybe some poor bovine living near
> > Chernobyl) but it sounds interesting.
> 
> C.O.W. in this context is usually "copy on write".
> 
> Atomic means that it's like a database transaction: the entire operation
> either succeeds, or fails.  There's no half-way state.
> 
> > I wonder if Btrfs has any notable drawbacks as a file system.
> 
> Some of the blood on btrfs is starting to dry, so the blood-seekers
> are all flocking to ZFS now.  It's got a whole new TIER of buzzwords
> and complexity!  It's GOT to be the best!!!

:-)

ISTR Android has btrfs as default these days? (careful, I didn't check,
and my brain has one fake news source embedded somewhere I couldn't
yet stomp out. Might be wrong).

cheers
- -- t
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Thread

Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-05 01:20 +0200
  Re: Live Fille System Backup Anders Andersson <pipatron@gmail.com> - 2017-05-05 03:50 +0200
    Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-05 06:50 +0200
      Re: Live Fille System Backup Dejan Jocic <jodejka@gmail.com> - 2017-05-05 09:00 +0200
        Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-05 22:40 +0200
          Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-05 23:20 +0200
            Re: Live Fille System Backup Henrique de Moraes Holschuh <hmh@debian.org> - 2017-05-06 00:00 +0200
              Re: Live Fille System Backup conover@rahul.net (John Conover) - 2017-05-06 01:30 +0200
                Re: Live Fille System Backup Henrique de Moraes Holschuh <hmh@debian.org> - 2017-05-06 02:30 +0200
          Re: Live Fille System Backup Henrique de Moraes Holschuh <hmh@debian.org> - 2017-05-06 00:00 +0200
          Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-06 08:00 +0200
            Re: Live Fille System Backup Dan Ritter <dsr@randomstring.org> - 2017-05-06 12:50 +0200
              Re: Live Fille System Backup tomas@tuxteam.de - 2017-05-06 16:00 +0200
                Re: Live Fille System Backup Henrique de Moraes Holschuh <hmh@debian.org> - 2017-05-06 19:20 +0200
                Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-06 21:50 +0200
                Re: Live Fille System Backup Henrique de Moraes Holschuh <hmh@debian.org> - 2017-05-06 23:10 +0200
                Re: Live Fille System Backup Ben Caradoc-Davies <ben@transient.nz> - 2017-05-07 01:00 +0200
                Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-07 12:00 +0200
                Re: Live Fille System Backup rhkramer@gmail.com - 2017-05-07 14:50 +0200
                Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-07 17:00 +0200
                Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-09 00:50 +0200
                Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-09 01:10 +0200
                Re: Live Fille System Backup tomas@tuxteam.de - 2017-05-09 10:00 +0200
                Re: Live Fille System Backup Greg Wooledge <wooledg@eeg.ccf.org> - 2017-05-09 14:10 +0200
                Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-09 14:30 +0200
                Re: Live Fille System Backup Curt <curty@free.fr> - 2017-05-09 15:20 +0200
                Re: Live Fille System Backup Curt <curty@free.fr> - 2017-05-09 14:10 +0200
                Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-09 14:30 +0200
  Re: Live Fille System Backup <tomas@tuxteam.de> - 2017-05-05 09:20 +0200
  Re: Live Fille System Backup Bob Weber <bobrweber@gmail.com> - 2017-05-06 01:00 +0200
  Re: Live Fille System Backup Stefan Monnier <monnier@iro.umontreal.ca> - 2017-05-12 15:00 +0200
    Re: Live Fille System Backup Sergei G <sergeig.public@gmail.com> - 2017-05-25 05:40 +0200

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