For batched indexing I recommend: (1) increasing mergeFactor somewhat, depending on how many indexed fields you have; (2) adding all of your documents; and (3) optimizing once at the end.
Thanks for all the advice on this. I did as Doug suggested, and the indexing completed in around 13 hours, without using an excessive amount of disk space.
I do have another problem: running multi-user tests - four "users" all firing off queries one after the other - I hit this exception at the start of one run:
caught a class java.io.IOException with message: Timed out waiting for [EMAIL PROTECTED]:\Lucene_Index\Index0001\commit.lock
Can anyone explain what's happening here - why does it need a lock in order to READ the index? Is there something I should be doing different?
Thanks,
Roger
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