If by "incremental" you mean creating an index where files newer than N 
are indexed, see the -N option.

You can merge two or more indexes with the -M option.

What swish does NOT support, though it has often been asked for, is the 
kind of "incremental" indexing where an existing index is modified 
(updated with new files, non-existent files removed, etc.). You use the 
-N (or other scheme of your choosing) and then the -M option to merge.

For example, you might create a weekly index of everything, then a daily 
index of only files that have changed since the master index was last 
updated. You could then merge the two indexes.

See the -N option for a better (more complete) example:

http://swish-e.org/current/docs/SWISH-RUN.html#INDEXING

Timo Haberkern wrote on 7/27/04 3:47 AM:

> Hello,
> 
> i read some messages in the archive of this list, that it is possible to 
> index incrementally. But i didn't get the thing work...
> 
> Can anybody tell me how i can configure my swish indexing to use the 
> incremental mode???
> 
> best regards
> 
> Timo

-- 
Peter Karman - Software Publications Engineer - Cray Inc
phone: 651-605-9009 - mailto:karman@cray.com