Backup Central

Hello!

i'm using rsnapshot to backup my laptop's disk on an external usb drive.
I'm using no_create_root to prevent backups when the external drive
isn't attached. The jobs are automated by cron and anacron. I got a
problem with the rotation of the backups: since the external drive isn't
attached all the time the backups fail (like they should):

[01/Jan/2012:10:32:22] /usr/bin/rsnapshot weekly: ERROR:
/media/backup/rsnapshot does not exist.

I would expect rsnapshot to realize that the last weekly backup is
missing and to run rsnapshot weekly/daily before the schedules hourly
(which occurs more often of course). I couldn't figure out how to make
rsnapshot catch up the missing (e.g. weekly) backup.

Any ideas how to do this?

Thanks a lot!

Michael


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Hallo, Michael,

Du meintest am 18.01.12:

i'm using rsnapshot to backup my laptop's disk on an external usb
drive. I'm using no_create_root to prevent backups when the external
drive isn't attached. The jobs are automated by cron and anacron. I
got a problem with the rotation of the backups: since the external
drive isn't attached all the time the backups fail (like they
should):

[01/Jan/2012:10:32:22] /usr/bin/rsnapshot weekly: ERROR:
/media/backup/rsnapshot does not exist.

I would expect rsnapshot to realize that the last weekly backup is
missing and to run rsnapshot weekly/daily before the schedules hourly
(which occurs more often of course).

Why should it?
When I compare backups I look for the time stamps, not for the numbers
of the versions.
And when there is a gap between (p.e.) "weekly.2" and "weekly.4" I
expect also a gap in the time stamps.

I couldn't figure out how to
make rsnapshot catch up the missing (e.g. weekly) backup.

It has to be missing when the job hasn't run.

Viele Gruesse!
Helmut

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Well in extreme i think i'll only backup one day at all since the old
backups aren't rotated. Or am i getting something wrong?

On 01/19/2012 07:32 AM, Helmut Hullen wrote:
Hallo, Michael,

Du meintest am 18.01.12:

i'm using rsnapshot to backup my laptop's disk on an external usb
drive. I'm using no_create_root to prevent backups when the external
drive isn't attached. The jobs are automated by cron and anacron. I
got a problem with the rotation of the backups: since the external
drive isn't attached all the time the backups fail (like they
should):

[01/Jan/2012:10:32:22] /usr/bin/rsnapshot weekly: ERROR:
/media/backup/rsnapshot does not exist.

I would expect rsnapshot to realize that the last weekly backup is
missing and to run rsnapshot weekly/daily before the schedules hourly
(which occurs more often of course).

Why should it?
When I compare backups I look for the time stamps, not for the numbers
of the versions.
And when there is a gap between (p.e.) "weekly.2" and "weekly.4" I
expect also a gap in the time stamps.

I couldn't figure out how to
make rsnapshot catch up the missing (e.g. weekly) backup.

It has to be missing when the job hasn't run.

Viele Gruesse!
Helmut

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Metro Style Apps, more. Free future releases when you subscribe now!
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Am Mittwoch, 18. Januar 2012, 21:34:46 schrieb Michael Strobel:
Hello!

i'm using rsnapshot to backup my laptop's disk on an external usb drive.
I'm using no_create_root to prevent backups when the external drive
isn't attached. The jobs are automated by cron and anacron. I got a
problem with the rotation of the backups: since the external drive isn't
attached all the time the backups fail (like they should):

[01/Jan/2012:10:32:22] /usr/bin/rsnapshot weekly: ERROR:
/media/backup/rsnapshot does not exist.

I would expect rsnapshot to realize that the last weekly backup is
missing and to run rsnapshot weekly/daily before the schedules hourly
(which occurs more often of course). I couldn't figure out how to make
rsnapshot catch up the missing (e.g. weekly) backup.

Any ideas how to do this?

Hi Michael,

anacron uses files and their timestamps in /var/spool/cron/lastrun/ to keep
track of executed intervals of e. g. cron.hourly. If rsnapshot is unsuccessful
(i. e. no disc attached), a wrapper script in /etc/cron.hourly could delete
/var/spool/cron/lastrun/cron.hourly. This would trigger a re-execution of all
hourly anancron jobs in 10 minutes (via the real cron entry).

HTH,

Johannes Nieß

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Hallo, Michael,

Du meintest am 19.01.12:

[...]

[Top post and full quote repaired]

I would expect rsnapshot to realize that the last weekly backup is
missing and to run rsnapshot weekly/daily before the schedules
hourly (which occurs more often of course).

Why should it?
When I compare backups I look for the time stamps, not for the
numbers of the versions.
And when there is a gap between (p.e.) "weekly.2" and "weekly.4" I
expect also a gap in the time stamps.

[...]

Well in extreme i think i'll only backup one day at all since the old
backups aren't rotated. Or am i getting something wrong?

"That depends!"
On my laptop I have defined "hourly" to run every 6 hours - that fits
most times.
The "daily", "weekly" and "monthly" intervals are controlled by
"anacron", and that works as expected ...

Viele Gruesse!
Helmut

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