> Their biggest drawback is that you can't modify the index I hadn't looked into them, but being read only would make them useless for my use case. Basically,

> Their biggest drawback is that you can't modify the index I hadn't looked into them, but being read only would make them useless for my use case. Basically, my application is online zips-of-images set deduplication, with a continuous input stream of files. I have to be able to add new values continuously.