An open discussion list for topics related to the eduGAIN interfederation service.

[Tomasz Wolniewicz <twoln AT umk.pl>]

Hi Kristof,
   this will be of course documented in the metadata aggregation
procedures document which is to be created, but to answer directly:

The algorithm is very simple, however not necessarily very just.
Federation feeds are aggregated in the order that federations started
supping metadata to eduGAIN and when a clash is found the new entity is
automatically dropped by pyFF. No comparison of entities is performed,
other entities are imported normally.

If you go to the entities database you can use the entity clashes
filter. You can set "Show clashes" which will show you the normal
listing but also display clash warnings, or you can set "Only clashes"
which will limit the listing to entities where clashes  appeared.
Currently there are 13 such entities in eduGAIN. If you click on the
CLASH link you will see which federation actually supplies the entity
and what are the other federations where this entity has appeared. (All
this is explained in the Entity clashes tooltip.)

Tomasz


W dniu 2016-09-07 o 14:02, Kristof Bajnok pisze:
> Hi Maja, Tomasz,
>
> can you please give an insight what happens if the same entityID is
> present in two federation's feed? Would it be detected by the edugain
> aggregator? Would the two clashing metadata entities be compared? (If
> yes, how?) Would any of the feeds rejected? Is it possible to tell,
> which one was the "first" in edugain with that name?
>
> I'm wondering whether checking the most up-to-date MDS feed is a must
> before exporting an entity to edugain.
>
> Thanks in advance,
> Kristof

-- 
Tomasz Wolniewicz    
          twoln AT umk.pl        http://www.home.umk.pl/~twoln

Uczelniane Centrum Informatyczne   Information&Communication Technology Centre
Uniwersytet Mikolaja Kopernika     Nicolaus Copernicus University,
pl. Rapackiego 1, Torun               pl. Rapackiego 1, Torun, Poland
tel: +48-56-611-2750     fax: +48-56-622-1850       tel kom.: +48-693-032-576