special graph urn:x-arq:UnionGraph with TDB

[Jean-Marc Vanel <je...@gmail.com>]

Hi


Is it a lazy copy of the TDB data?
That, will it load triples in memory as soon as the navigation or query
demands them ?
Will it unload triples in memory later ?

Is it a live copy of the TDB data?
Or will it reflect the updates occurring in current transactions?
In other transactions?

What elapsed time can be expected for the creation of the graph alone,
depending on the size of the database and the active transactions?

Re: special graph urn:x-arq:UnionGraph with TDB

[Andy Seaborne <an...@apache.org>]

On 17/08/15 09:12, Jean-Marc Vanel wrote:
> Hi
>
>
> Is it a lazy copy of the TDB data?
> That, will it load triples in memory as soon as the navigation or query
> demands them ?
> Will it unload triples in memory later ?
>
> Is it a live copy of the TDB data?
> Or will it reflect the updates occurring in current transactions?
> In other transactions?
>
> What elapsed time can be expected for the creation of the graph alone,
> depending on the size of the database and the active transactions?
>

It's not a copy.  It's computed on access, so it is up-to-date with the 
view seen by the current transaction of all data.

	Andy