Backup Central

Hi!

What will happen if I run out of space, will that somehow corrupt the
backups? Sorry if I'm asking a question that has been answered
already.

Thanks for a great piece of software!

Sincerely,
Markus Hedlund
http://getsnowfire.com

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Hallo, Markus,

Du meintest am 29.03.11:


What will happen if I run out of space, will that somehow corrupt the
backups?


No - the existing backups remain unchanged, at least those of the lowest
interval (p.e. "hourly").

The higher intervals run on: "daily" is rotated, "weekly" is rotated,
...

Viele Gruesse!
Helmut

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Even if we run out of space mid-backup?

Thanks,
Markus



On Tue, Mar 29, 2011 at 11:06 PM, Helmut Hullen <Hullen < at > t-online.de> wrote:
Hallo, Markus,

Du meintest am 29.03.11:


What will happen if I run out of space, will that somehow corrupt the
backups?


No - the existing backups remain unchanged, at least those of the lowest
interval (p.e. "hourly").

The higher intervals run on: "daily" is rotated, "weekly" is rotated,
...

Viele Gruesse!
Helmut

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Hallo, Markus,

Du meintest am 30.03.11:

What will happen if I run out of space, will that somehow corrupt
the backups?

No - the existing backups remain unchanged, at least those of the
lowest interval (p.e. "hourly").

Even if we run out of space mid-backup?

The program rebuilds the old backups. Just take a try - it doesn't hurt.

Viele Gruesse!
Helmut

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Okay, thanks!




On Wed, Mar 30, 2011 at 9:36 AM, Helmut Hullen <Hullen < at > t-online.de> wrote:
Hallo, Markus,

Du meintest am 30.03.11:

What will happen if I run out of space, will that somehow corrupt
the backups?

No - the existing backups remain unchanged, at least those of the
lowest interval (p.e. "hourly").

Even if we run out of space mid-backup?

The program rebuilds the old backups. Just take a try - it doesn't hurt.

Viele Gruesse!
Helmut

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On Wed, Mar 30, 2011 at 09:00:51AM +0200, Markus Hedlund wrote:
Even if we run out of space mid-backup?
On Tue, Mar 29, 2011 at 11:06 PM, Helmut Hullen <Hullen < at > t-online.de> wrote:
Hallo, Markus,
What will happen if I run out of space, will that somehow corrupt the
backups?
No - the existing backups remain unchanged, at least those of the lowest
interval (p.e. "hourly").

Because it interrupts the flow of the conversation and makes it harder
to read.
Why shouldn't I top-post?

If you run out of space during a backup, you may end up with a dodgy
daily.0 (or whatever your most frequent backup is called). And this
dodginess may slowly spread, as that backup gets copied to daily.1,
daily.2 etc. But you'll see from your logs (which you do, of course,
read) that that happened, and so be able to rectify the problem before
it becomes severe.

In this, rsnapshot is the same as any other backup scheme.

--
David Cantrell | even more awesome than a panda-fur coat

THIS IS THE LANGUAGE POLICE
PUT DOWN YOUR THESAURUS
STEP AWAY FROM THE CLICHE

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On Wed, Mar 30, 2011 at 01:59:20PM +0100, David Cantrell (david < at > cantrell.org.uk) wrote:

If you run out of space during a backup, you may end up with a dodgy
daily.0 (or whatever your most frequent backup is called). And this
dodginess may slowly spread, as that backup gets copied to daily.1,
daily.2 etc.

sync_first with the recommended setup avoids the problem
pretty well: if sync fails, the rotation simply doesn't
take place, all old backups remain intact.
The "dodginess" cannot spread, backups are merely
suspended until you make room.

--
Tapani Tarvainen

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I guess I should put the log files on a separate partition. Otherwise
the logs won't be stored.

Rectify the problem, is that deleting the affected backup? Can
rsnapshot handle a missing backup? daily.0 daily.1 daily.3 for
example.

// Markus




On Wed, Mar 30, 2011 at 2:59 PM, David Cantrell <david < at > cantrell.org.uk> wrote:
On Wed, Mar 30, 2011 at 09:00:51AM +0200, Markus Hedlund wrote:
Even if we run out of space mid-backup?
On Tue, Mar 29, 2011 at 11:06 PM, Helmut Hullen <Hullen < at > t-online.de> wrote:
Hallo, Markus,
What will happen if I run out of space, will that somehow corrupt the
backups?
No - the existing backups remain unchanged, at least those of the lowest
interval (p.e. "hourly").

Because it interrupts the flow of the conversation and makes it harder
to read.
Why shouldn't I top-post?

If you run out of space during a backup, you may end up with a dodgy
daily.0 (or whatever your most frequent backup is called).  And this
dodginess may slowly spread, as that backup gets copied to daily.1,
daily.2 etc.  But you'll see from your logs (which you do, of course,
read) that that happened, and so be able to rectify the problem before
it becomes severe.

In this, rsnapshot is the same as any other backup scheme.

--
David Cantrell | even more awesome than a panda-fur coat

THIS IS THE LANGUAGE POLICE
PUT DOWN YOUR THESAURUS
STEP AWAY FROM THE CLICHE

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today! http://p.sf.net/sfu/intel-dev2devmar
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On Wed, Mar 30, 2011 at 3:16 PM, Tapani Tarvainen
<rsnapshot < at > tapanitarvainen.fi> wrote:
On Wed, Mar 30, 2011 at 01:59:20PM +0100, David Cantrell (david < at > cantrell.org.uk) wrote:

If you run out of space during a backup, you may end up with a dodgy
daily.0 (or whatever your most frequent backup is called).  And this
dodginess may slowly spread, as that backup gets copied to daily.1,
daily.2 etc.

sync_first with the recommended setup avoids the problem
pretty well: if sync fails, the rotation simply doesn't
take place, all old backups remain intact.
The "dodginess" cannot spread, backups are merely
suspended until you make room.

That's good to know. Does rsnapshot check if there's space available,
regardless of sync_first?


--
Tapani Tarvainen

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Hallo, Markus,

Du meintest am 30.03.11:

sync_first with the recommended setup avoids the problem
pretty well: if sync fails, the rotation simply doesn't
take place, all old backups remain intact.
The "dodginess" cannot spread, backups are merely
suspended until you make room.

That's good to know. Does rsnapshot check if there's space available,
regardless of sync_first?

No - how should it check?
It doesn't know how much space it will use.

If nothing has changed it needs no additional space.
If all has changed it needs the whole space.

Viele Gruesse!
Helmut

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Hallo, Markus,

Du meintest am 30.03.11:

No - the existing backups remain unchanged, at least those of the
lowest interval (p.e. "hourly").

Because it interrupts the flow of the conversation and makes it
harder to read.
Why shouldn't I top-post?

[...]

[Top-post repaired]

I guess I should put the log files on a separate partition. Otherwise
the logs won't be stored.

???
The place of the log file is defined in "/etc/rsnapshot.conf" (or
whatelse you may define as config file). And I hope that you have
included "/var/log" into your backup.

Rectify the problem, is that deleting the affected backup? Can
rsnapshot handle a missing backup? daily.0 daily.1 daily.3 for
example.

Why should it? The programm rotates the backups when you tell it to
rotate them.

Why don't you test your ideas? It's a very simple job to look for a
small partition and then put a lot of "rsnapshot" backups into this
partition.

----------------------

Please don't top post.
Please don't full quote.
Thank you!

If you use the mail program from googlemail: that's nasty crap. Take a
better program. Thank you!


Viele Gruesse!
Helmut

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On Wed, Mar 30, 2011 at 03:18:50PM +0200, Markus Hedlund wrote:

I guess I should put the log files on a separate partition. Otherwise
the logs won't be stored.

Indeed.

Rectify the problem, is that deleting the affected backup?

If the problem is lack of space, then deleting a backup would only be a
temporary fix. A permanent fix would be to add more disk space.

--
David Cantrell | Godless Liberal Elitist

Planckton: n, the smallest possible living thing

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On Wed, Mar 30, 2011 at 03:56:00PM +0200, Helmut Hullen wrote:
Hallo, Markus,
That's good to know. Does rsnapshot check if there's space available,
regardless of sync_first?
No - how should it check?
It doesn't know how much space it will use.
If nothing has changed it needs no additional space.

That's not quite true. It doesn't need any extra space for files, but
it will still need space for directories.

--
David Cantrell | Minister for Arbitrary Justice

Compromise: n: lowering my standards so you can meet them

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On Wed, Mar 30, 2011 at 03:56:00PM +0200, Helmut Hullen (Hullen < at > t-online.de) wrote:

sync_first with the recommended setup avoids the problem
pretty well: if sync fails, the rotation simply doesn't
take place, all old backups remain intact.
The "dodginess" cannot spread, backups are merely
suspended until you make room.

That's good to know. Does rsnapshot check if there's space available,
regardless of sync_first?

No - how should it check?
It doesn't know how much space it will use.

Right. But the beauty of sync_first is that the sync call
in a sense acts as such a check, too: if it runs out of
space it fails before any corrupting rotation has occurred.

--
Tapani Tarvainen

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Hallo, David,

Du meintest am 30.03.11:

That's good to know. Does rsnapshot check if there's space
available, regardless of sync_first?

No - how should it check?
It doesn't know how much space it will use.
If nothing has changed it needs no additional space.

That's not quite true. It doesn't need any extra space for files,
but it will still need space for directories.

Ok - may be some kilobytes ...

Viele Gruesse!
Helmut

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