[Tracker] Sqlite now default in cvs (mysql backend wont compile yet!)

[Jamie McCracken <jamiemcc blueyonder co uk>]

I have ben spending the last few weeks adding in the sqlite/qdbm 
complete with indexer and parser.

This is now basically functional in cvs.

Stuff that wont work is :

1) RDF query
2) only tracker-search (no location or mime yet in nautilus)
3) exact phrase search

I have not updated the mysql backend yet so it wont compile at the 
moment so you are *forced* to try out the sqlite one :)

(I figure unless theres a strong reason to have the inferior mysql 
version we can phase it out?)

New features with new indexer are:

1) differential indexing for faster updates
2) stemming so searches for "penguin" will match against "penguins"
3) Bzip compression of full text so it has much smaller footprint in the 
sqlite db
4) high performance qdbm file based hash table for search thats fully 
scalabale up to many GBs on indexes without significant speed loss.


to compile you will need bzip dev stuff, qdbm dev stufff as well as sqlite3


Databases are now in Home/.Tracker/databases.

"data" file can be viewed with sqlite3 command line program

"Files" file can be viewed with dpmgr command line program (to optimise 
space of this file the following should be entered after indexing :

dpmgr optimize Files

(we will do this automatically in future after every 10,000 updates or so)

Please test and report any bugs.


--
Mr Jamie McCracken
http://jamiemcc.livejournal.com/