[Sugar-devel] [PATCH] Journal Volumes Backup and Restore

[Martin Abente]

On Mon, 28 Jun 2010 15:11:04 -0400, Martin Langhoff
<martin.langhoff at gmail.com> wrote:
> Hi Martin,
> 
> great to see action on this front. Thanks for working on this.
> 
> I have a few questions
> 
>  - Why is the UI in the main Journal UI? A manual backup should be a
> very infrequent op. (And same with a "full" restore).
>

Well, originally I added a XS backup and restore option (Journal
Management) into the Control Panel. Even when it was not intended for
upstreaming, I sent it to the mailing list, therefore a discussion started
about where these backup and restore options should go. Finally, this idea
of having the options in the resouces (volumes) palette was the most
wanted. 

The arguments favoring this idea were based on user friendliness: It seems
easier and makes more sense to find those options in the same context of
the resource that provides them.

>  - Is the 'restore' option a 'full restore' or does it allow to browse
> existing backup snapshots?
> 

Not yet, it does a full restore from the one that is available on the
storage device. For the Schoolserver backup, we plan to let users choose
from the list of available backups, in the future.

> ...If it is a 'full restore', is it destructive? What does it do with
> documents that already exist but have been modified locally? What does
> it do with space concerns (ie: if the backup won't fit on disk) ?
> 

Yes, the entries added after the last backup will be lost.

At first sight it seemed easy to just append data, but there are many hard
to cover scenarios (Corner cases). Mostly the ones when you have to
consider the very few space available. So for the time being we don't merge
backups, still better than loosing all data :).

> cheers,
> 
> 
> 
> -- 
>  martin.langhoff at gmail.com
>  martin at laptop.org -- School Server Architect
>  - ask interesting questions
>  - don't get distracted with shiny stuff  - working code first
>  - http://wiki.laptop.org/go/User:Martinlanghoff
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