Re: Appending to a collection, merging collections, or just "restoring" db-files

Jonas Lindqvist wrote:
> Hi!
>
> Are these steps sufficient to restore the db-files or as a way to 
> append images to a collection? (Or merge two collections, or whatever):
>
> 1. Create a bunch of .fts files in 
> $GIFT_HOME/gift-indexing-data/collectionName/, using 
> gift-extract-features. (and a heap of ppm images)
>
> 2. If InvertedFileFeatureDescription.db is okay, we SHOULD be able to 
> use it!? 

Yes. It is constant for any given feature set (of which there is only 
one available in the GIFT distro).

> Or we create a new by doing something magic like:
> cat arbitraryPpmImage.ppm | gift-write-feature-descs | perl -ne 'print 
> join(" ",(split(" ",$_))[0..1]),"\n";' > 
> InvertedFileFeatureDescription.db
>
> 3. recreate a url2fts.xml, with paths to all the .fts files we want to 
> use, and some path to thumbnails and images (for the server to use 
> when presenting its results). A quick perl hack will do this easily.
>
> 4. Run "gift-generate-inverted-file 
> $GIFT_HOME/gift-indexing-data/collectionName/" to recreate 
> InvertedFile.db and InvertedFileOffset.db (using the url2fts.xml file)
>
> 5. Restart the running gift server.
>
>
> Something similar to this appeared to work when I was experimenting 
> with the GIFT a while back, but I haven't tried it properly lately.
>
> What do you say? Have I missed some important steps, or have I 
> misunderstood something?

Looks good to me. Have you tried it?

The only thing I can think of is making sure that the collection name 
and id still match those in the gift-config.mrml file (added by 
gift-add-collection), but I think they should...

Cheers,

David

-- 
Dr David McG. Squire, Senior Lecturer, on sabbatical in 2006
Caulfield School of Information Technology, Monash University, Australia
CRICOS Provider No. 00008C       http://www.csse.monash.edu.au/~davids/