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Groups > linux.debian.user > #180872
| From | tomas@tuxteam.de |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: Live Fille System Backup |
| Date | 2017-05-09 10:00 +0200 |
| Message-ID | <tF8dQ-7bU-15@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <tEr8R-3J7-1@gated-at.bofh.it> <tEtNn-5oJ-5@gated-at.bofh.it> <tEvPb-6Hv-7@gated-at.bofh.it> <tEZDz-1zC-5@gated-at.bofh.it> <tEZWV-1Vv-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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On Mon, May 08, 2017 at 04:03:54PM -0700, Sergei G wrote:
> And if you think application consistency is nothing to worry about know
> that Git on Ext4 has failed to recover.
>
> My current conclusion:
>
> 1. If I want application consistency I have to take down any application
> that has an internal database or backup those applications prior to FS
> backup.
That depends. There are applications designed with (on-disk) consistency
in mind (I mention PostgreSQL, I start sounding like a broken record).
But whether you have to "take down" the application or just "alert" it
for the time the snapshot takes, without its cooperation you either risk
inconsistent state or bad performance (there are cases where apps chose
number two, because they aren't designed for high throughput anyway).
The gist is:
(a) file system magic can't "do" it alone
(b) most of the time, a naive "snapshot" with rsync will do
(b') you alone can decide, based on your apps & requirements,
whether the above "most of the time" works for you
With snapshotting file systems (be it native or assisted) you get just
faster snapshots, i.e. you mitigate the problem. If you want to go all
the way, you have to get the app's cooperation, either voluntary (it's
designed for that) or forced (shutdown)
There's no magic.
cheers
- -- tomás
"all generalizations suck"
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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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