Let me restate my first question, under the folder “/@fts/” why are there multiple copies of the same index?
Now to try and answer your question, at that time, I was adding around 10 million attribute to 1.7 million documents. While monitoring the process the Couchbase UI warned me that my disk space was low. I stopped the upload and start to track down why disk usage was high. At this point, I found 6 copies of the same fts index, cd_info_fts. To try and recover space I deleted the fts index using the UI, after the UI showed the fts index gone I checked my disk space and found that the fts indexs where still there, all 6 of them.
I will work on getting you the per document size.
Thanks