[Nepomuk] Backup service. Was: Re: ontology related advice request

[Sebastian Trüg]

Just for your consideration:

sopranocmd --backend sesame2 --serialization nquads --nrl --graphselect 
"s;p;o;g" query 'select distinct ?s ?p ?o ?g where { graph ?g { ?s ?p ?o . } . 
OPTIONAL { { ?g nie:dataGraphFor ?x . } UNION { ?g nrl:coreGraphMetadataFor 
?g2 . ?g2 nie:dataGraphFor ?x . } UNION { ?g 
<http://www.strigi.org/fields#indexGraphFor> ?x . } UNION { ?g 
nrl:coreGraphMetadataFor ?g2 . ?g2 
<http://www.strigi.org/fields#indexGraphFor> ?x . } } . FILTER(!BOUND(?x)) . 
FILTER(?g != <urn:crappyinference:inferredtriples>) . }'

This is the weird command that only exports statements that are not created by 
strigi or akonadi and are not inferred by the crappy inferencer.

Maybe I should blog this...

Cheers,
Sebastian

On Friday 23 October 2009 07:47:12 Evgeny Egorochkin wrote:
> В сообщении от Пятница 23 октября 2009 08:18:15 автор Ben Martin написал:
> > On Wed, 2009-10-21 at 17:04 +0100, Laura Dragan wrote:
> > ...
> >
> > > I promised a while back that I would do a backup service
> > > (NepomukService) but I never got around to do it. There are a lot of
> > > things to consider, especially regarding the decision on what to
> > > backup .. We should discuss this at the workshop, maybe we can
> > > actually get it done :)
> >
> > I've also been thinking it would be nice to make such a thing more
> > readily available. Currently I just sopranocmd export to a file which is
> > itself incrementally backed up by bacula.
> 
> For now it seems like the diff tool should have some presets for
>  backup/restore operations. eg you want your work data backed up daily and
>  to a different location than tags for your multimedia lib which is backed
>  up weekly.
> 
> Looks like a collection of small scripts + some GUI. I wish I had time to
>  do this but unf I'm totally occupied with libstreamanalyzer atm :(
> 
> > But having some sort of rdiff
> > like thing build into the backup process would make sense.
> >
> > For redland, a scheduled repair and lzo db_dump -p of the db files seems
> > to work OK.
> 
> It's better to only backup user-generated content. This means you get to
> backup MBs instead of GBs. Imagine someone telling nepomuk to index KDE
>  repo or something equally crazy(but possible) like this.
> 
> Of course indexing GBs of data doesn't apply to redland :)
> 
> -- Evgeny
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