FTS solr or xapian and Public Folders

[David Williams]

Hi all

I hope someone can help with this.

I'm looking at setting up FTS on a Dovecot server which has some quite 
big pubic folders (100,000+ emails each) and would appreciate some info 
about how fts both Xapian and Solr works with public folders.

As background of the folders can receive emails and I use a dummy user 
and an alias file to deliver them for example

testfolder:    dummy+Public/MYTESTFOLDER at example.com

delivers email addressed to testfolder at example.com to MYTESTFOLDER in 
the namespace Public.

Has anyone successfully setup FTS with public folders using either 
Xapian or Solr and what happens when one user changes a folder, does 
that change show up for other users?

E.G.:

When an email is delivered by dummy and indexed will that email be 
indexed for other users as well?

Similarly what happens that when an email is moved between, deleted from 
or copied to public folders by one user will that change then show up 
for the other users or not?

I guess the basic question is: Are public folders indexed once and then 
the indexes are made available to each user with access or are they 
indexed for each user?

Any info or experience that anyone has will be appreciated.

Many thanks

David