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Re: Live Fille System Backup

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On Tue, May 09, 2017 at 12:03:14PM +0000, Curt wrote:
> Because someone mentioned Btrfs and its backup "magic," I'm looking at
> the wiki, which says (amongst other things):
> 
> https://btrfs.wiki.kernel.org/index.php/Incremental_Backup
> 
>  Instant, Atomic COW Snapshots
>   Since the snapshots are atomic, when a snapshot is restored it appears to
>   applications as if a power loss had occurred (and the filesystem has gone back
>   to an earlier state). Thus it is possible to backup databases without stopping
>   them beforehand. 

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

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!!!

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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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