[Borgbackup] question regarding restoration of latest backup

[Christian]

Hi Marian,

thanks again for your answer.

Now I get it. That´s really fantastic.
I just tried it out by adding a new file to the original folder, then
backing it up and deleting the first backup.
And indeed the second backup holds all data including the newly created one.

borgbackup is really a wonderful programme. Now that I know how it works
I like it even better.

Thanks again for your fast help.

Have a nice weekend.

Greetings.
Rosika

Am 15.09.2018 um 17:57 schrieb Marian Beermann:
> Yes, that's indeed the case.
>
> Each archive can be independently manipulated from every other archive.
> Borg recognizes duplicate data (e.g. from Monday and Tuesday) backups
> and stores it only once; deleting Monday will not delete any data still
> used by Tuesday.
>
> -Marian
>
> On 9/15/18 5:48 PM, Christian wrote:
>> Hi Marian,
>>
>>
>> thank you so much for your fast answer.
>>
>> Yet it´s not quite clear to me how it works.
>>
>> Referring to my example: Do you say that I can delete the Monday-backup?
>> That would imply that all the data of the Monday-backup is present in
>> the Tuesday-backup as well.
>>
>> I was of the opinion that the Tuesday-backup only holds the new data. Or
>> did I get it wrong?
>>
>> Greetings
>> Rosika
>>
>>
>>
>> Am 15.09.2018 um 17:37 schrieb Marian Beermann:
>>> You don't have to think about any of that.
>>>
>>> You can create an archive.
>>> You can extract it.
>>> Deleting other archives makes no difference.
>>>
>>> -Marian
>>>
>>> PS: That's the trade-off made by Borg and similar software. Requires
>>> more CPU and memory resources, but gets rid of inter-backup dependencies.
>>>
>>> On 9/15/18 5:27 PM, Christian wrote:
>>>> Hi altogether,
>>>>
>>>> I´ve got a question regarding restoration of backups.
>>>>
>>>> I looked at https://borgbackup.readthedocs.io/en/stable/quickstart.html
>>>> for information. But somehow I couldn´t find what I was looking for.
>>>>
>>>> Out of sheer interest:
>>>>
>>>> Suppose I created a backup with "borg create /path/to/repo::Monday ~/src
>>>> ~/Documents" .
>>>> And the next day: "borg create --stats /path/to/repo::Tuesday ~/src
>>>> ~/Documents" .
>>>>
>>>> It says: "This backup will be a lot quicker and a lot smaller since only
>>>> new never before seen data is stored."
>>>>
>>>> O.K., I understand. But what if I wanted to restore the latest backup
>>>> (the "Tuesday" one)?
>>>> Since this one only holds the new data I suppose I´d have to keep the
>>>> "Monday" backup, too.
>>>>
>>>> But what would be the correct command? Would it be  "borg extract
>>>> /path/to/repo::Tuesday" ?
>>>> After all I want to retore the latest backup.
>>>> Would "borg extract /path/to/repo::Tuesday"  take care of the "Monday"
>>>> backup automatically since the bulk of the data is stored there?
>>>>
>>>> Thanks a lot for your help.
>>>>
>>>> Greetings
>>>> Rosika
>>>>
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>>>>
>