[Sugar-devel] Getting Journal entries off an XO at the end of a project?

[Christoph Derndorfer]

On Tue, Jan 17, 2012 at 11:49 AM, Sascha Silbe <silbe at activitycentral.com>wrote:

> Excerpts from Christoph Derndorfer's message of 2012-01-13 20:29:34 +0100:
>
> [Backup activity]
> > > Make a backup of the Journal entries...
> > >
> > > The process is make an .tar.gz of all entries and save in a folder
> into an
> > > usb: /backup/SN###### (SN#... is the serial of the XO)
>
> Slight correction: JEBs ([1], the same format the XS uses) are zip
> files, not tar.gz files. The file name includes the user name (as used
> in Sugar), so it should be easy to figure out who each backup belongs
> to.


That point about the file name including the user name is good to know. :-)


> > > PD: in ourt Uruguayan image.. Dextrosa.. The backup/restore are
> > > functions
> > > that appears in the Journal..
> > > I think that is the same script that this activities had..
>
> Nop, the format used by the Dextrose backup / restore feature is
> completely different. It tars up the on-disk data structures of
> sugar-datastore and dumps them to the same place, removing a special
> file to trigger reindexing. This happens to work for current versions of
> sugar-datastore, but is a bad idea in general. It wouldn't have worked
> with sugar-datastore < 0.84 and doesn't work with gdatastore [2].
>
>
> > thanks for your suggestion. I had looked into the Backup Activity but
> > according to the description on ASLO it only works with the data store
> from
> > Sugar 0.84 onwards and these machines are still running on build 767
> which
> > shipped with Sugar 0.82 (though I hope to *finally* upgrade them to
> 11.3.0
> > next month).
>
> I found and fixed the source of your confusion. Seems I forgot to update
> the description after adding support for 0.82; sorry for that.
>
> While I have been rigorous in testing Backup and Restore with all
> combinations of a range of Sugar versions from 0.82 to 0.89 (0.90), the
> oldest OLPC OS build I have running is 801, so I'd recommend testing
> Backup with OLPC OS build 767 first before relying on it. If you do test
> it on 767, please let me know the results so I can mention them on
> a.sl.o.
>

This is excellent information.

I'll definitely keep you posted with my findings once I have some time to
test things in late January / early April. :-)


> Doing a full backup is a good idea regardless of any "cherry-picking"
> you do. It allows you to go back and extract additional objects that you
> (or the kids) forgot during the first run.
>

Yeah, good point!

Thanks,
Christoph


> Sascha
>
> [1] http://wiki.laptop.org/go/Journal_entry_bundles
> [2] https://git.sugarlabs.org/gdatastore
> --
> http://sascha.silbe.org/
> http://www.infra-silbe.de/
>



-- 
Christoph Derndorfer

volunteer, OLPC (Austria) [www.olpc.at]
editor, OLPC News [www.olpcnews.com]
contributor, TechnikBasteln [www.technikbasteln.net]

e-mail: christoph at derndorfer.eu
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