[Xesam] Metadata Storage Daemon

[Sebastian Trüg]

On Friday 11 January 2008 23:54:07 Mikkel Kamstrup Erlandsen wrote:
> I have one question that I have not really thought through myself yet...
>
> Should the storage monitor files? Fx Should the store drop data on
> files that are deleted? This makes good sense if we talk about
> tagging, since I don't want to list files that had tag "foo" back when
> they existed (apps could do a stat-dance to check existence, but i
> would rather avoid that).
>
> Or more generally updating internal structures if parts of graphs are
> modified in a way that must be propagated for the layout to remain
> consistent (fx clean up dead links[1]).

Actually in nepomuk I do this independently and I think this is solution to go 
for "these days". The storage service only provides the actual data while 
another file monitoring service handles updating it.
This allows for an easy combination of different implementations and simple 
replacement with more advanced components. It also allows different services 
for different storage locations such as NFS or USB sticks or whatever. I 
think nowadays questions like these should very often be answered with "make 
it modular".

Cheers,
Sebastian