Back In Time

interrupted backup

Asked by Wolfram

Could you explain please what happens, if my backup is interrupted (e.g. network loss)?

Does this affect the consistency of data on any subsequent backup or will it recover to transfer all data the next time I start?

Background of my question: I do have a lot of data to backup, but cannot (do not want to) do this all in one run. If "Back in Time"backs up my data (for lets say limited to one hour a day), I should get more and more complete with each run. Would this work or do I have some obstacles then?

Thanks,
Wolfram

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Revision history for this message
Dan (danleweb) said : 		#1

For the moment BIT does not check if the backup is OK or not. This is wrong ... and should be fixed ... soon.
But the snapshot process can not paused/resumed. The problem is that the snapshot had a date/time. If that backup start, then is paused and resumed ... it can finish 2 days latter ...

For the moment you can use schedule per include directory so big directories can be backup less frequent.
The next version will support profiles too.

Revision history for this message
Wolfram (woppl) said : 		#2

Well, understood.
Schedule per include dir does not solve my problem. I have to back up approx 1TB. So my first backup causes some headaches - as I have a limited timeslot (per day) only. I currently evaluate to split and add one more include folder on every run. Once I have all subfolders backed up, I will replace them by a single parent folder. Hope this works.
Thanks,
Wolfram

P.S.: Yes, profiles would be great.
A log of each performed backup with all parameters and each file listed with its action also would be beneficial.

Revision history for this message
Bart de Koning (bratdaking) said : 		#3

Do not use schedule per included folder for version 0.9.26! It does not
support har1inking, what in the case of a tera definitely will cause
nightmares (it will do a full backup each time it takes a snapshot)!

By the way I am curious to your experiences with a tera of data. My
experience goes to 100 gig, that takes approx 2 minutes for an incremental
backup, so I am wondering if a tera takes 20 minutes or less?

Cheers,
Bart

2009/11/21 Wolfram <email address hidden>

> Question #90967 on Back In Time changed:
> https://answers.launchpad.net/backintime/+question/90967
>
> Status: Answered => Solved
>
> Wolfram confirmed that the question is solved:
> Well, understood.
> Schedule per include dir does not solve my problem. I have to back up
> approx 1TB. So my first backup causes some headaches - as I have a limited
> timeslot (per day) only. I currently evaluate to split and add one more
> include folder on every run. Once I have all subfolders backed up, I will
> replace them by a single parent folder. Hope this works.
> Thanks,
> Wolfram
>
> P.S.: Yes, profiles would be great.
> A log of each performed backup with all parameters and each file listed
> with its action also would be beneficial.
>
> --
> You received this question notification because you are an answer
> contact for Back In Time.
>

Revision history for this message
Wolfram (woppl) said : 		#4

To avaid failure in my initial backup, I selected smaller portions of my disk to be incrementally included. After that I replaced the sub-dirs by the parent dir and ran the backup again. So all worked perfectly as desired.

I now have approx 500Gig backed up from the network (NAS) on a dedicated usb-drive. As my number of files is relatively low (approx 40.000 I think), the comparison for an incremental backup now takes even less than 2 mins.

As said before, I am very much looking for profiles (or more simply the support for multiple configurations to be loadable). This would satisfy my need to backup into different target destinations.

Nice piece of software ! Hope you continue to support and enhance it. Maybe it will find its way into some distributions.

Best regards,
Wolfram