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

[Sebastian Trüg]

On Monday 26 October 2009 12:52:45 Evgeny Egorochkin wrote:
> В сообщении от Понедельник 26 октября 2009 12:44:39 автор Sebastian Trüg
> 
> написал:
> > 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...
> 
> I knew a cli command like this existed. This however doesn't address other
> backup tasks like backing up different kinds of data to different
>  locations, proper labelling, encryption and what not. Duplicity comes to
>  mind as a model...

of course not. I just posted this for fun. I am all for a backup service 
anyway. There is even a todo on the nepomuk project page.
 
> > 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
>