[VuFind-General] somewhat decouple Vufind and Solr?

[Michael L. <mi...@la...>]

Hello,

I have a normal Vufind installation up and running and everything is
running just fine.

Now I would like to add a second Solr core but I would like to feed it
from a couple of custom scripts and to save the additional step would
like not to pass the data through Solrmarc.
First question: is this possible/advisable? Or does Solrmarc more than
just indexing like e.g. adding something to the MySQL database or whatever?

Then, to take advantage of some recently added Solr features, I would
like to use Solr 4.x for this.
Second question: Is this possible? With Vufind 1.x?

And a third question: In case it is only possible with Vufind 2.x and
also to make a future transition easier: can both Vufind versions run on
the same server?

To give a little background, the second Solr is mainly just the storage
backend for a web service used as cataloging aid but it would be nice to
also be able to search it via Vufind.
Of course I will supply the usual fields, Vufind expects but would like
to add a couple of goodies.

-Michael