[Nepomuk] Issues with non persistent filesystems/mounts and Nepomuk

[Sebastian Trüg]

On 06/15/2010 04:19 PM, Daniel Winter wrote:
> 2010/6/15 Sebastian Trüg <trueg at kde.org>:
>> nepomuk:/ URIs never change. That is the whole idea.
> 
> Ok, know I got it.
> 
> On unmount it  transforms the url in nie:url  from an absoulte file:
> url to a relative  filex: url  and add a reference to a filesystem
> resource.

exactly.

> What happens on remount?  Will it again transform filex:  to file: ?
> 
> I believe it doesn't, right?

correct.

> So when Solid starts to support other mounts it should start to work
> in Nepomuk.  If Solid gives stable udi  for a given nfs mount  it
> should even work when the mount point changes.

yes.

> The only problem may be performance. If Nepomuk could somehow know
> that a FS will always have the same mount point it could omit the
> file->filex transformation.  (But how would it know, that the file is
> currently not avaible and where it could find it (to inform the user
> to mount xyz) ?

exactly that is the problem.

> Anyway, as long as solid doesn't support it, there is nothing Nepomuk
> could oder should do, I think.

Well, I am not sure, we could add some hack which avoids re-indexing
files on net mounts all the time. Would it be enough to exclude mounts
that are in fstab?

Cheers,
Sebastian