Hi Erik, >>So in your case #1, documents are reindexed with this scheme - so if you >>truly need to skip a reindexing for some reason (why, though?) you'll >>need to come up with some other mechanism. [perhaps update could be >>enhanced to allow ignoring a duplicate id rather than reindexing?]
It's pretty easy to ignore duplicate id during indexing but it won't solve my problem. I think the batch number works well in your case because you reindex existing documents which will get the updated batch number. In my case, I can't update existing documents and therefore, even if I use this approach, there is no way to know if an document is to be deleted. I think I will need to store all ids in the batch in a DocSet and then compare with the list of all ids after indexing. That way I can at least get rid of all expired documents. It's just not as elegant as using a batch identifier.
