I can't answer your questions, but use of lucene's document ids as persistent ids is strongly discouraged, particularly in version 4.x where I think it just won't work at all. There was a related thread a couple of weeks ago. See Uwe's message at http://mail-archives.apache.org/mod_mbox/lucene-java-user/201207.mbox/%3C033f01cd606a$1ad94960$508bdc20$%40thetaphi.de%3E where he says "To uniquely identify documents later you *have* to use a own key field."
-- Ian. On Mon, Jul 23, 2012 at 12:17 AM, snehal.chennuru <snehal.ku...@gmail.com> wrote: > Hello Everyone, > > We have a legacy system which uses lucene 2.4.1. We have ported a small hack > to lucene source code back then, so that the underlying lucene segment > merger code wouldn't reuse deleted docids. This helped us use lucene docids > as persistent dbids as well. But we want to upgrade lucene to 3.6, but it is > near impossible to "hack" lucene now to get the same behavior. > > I checked out NoMergePolicy, and it seemed to help achieve similar behavior > of not letting lucene reuse deleted docids. But I guess this would increase > the number of segments in the index. Any idea how many segments we are > talking about over here? Also, can we configure lucene to tell how many > documents to keep in a given segment. Each lucene index in this system can > have utmost 1M documents in them. Is there an alternative that I can > consider? > > Thanks, > Snehal > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/Usage-of-NoMergePolicy-and-its-potential-implications-tp3996630.html > Sent from the Lucene - Java Users mailing list archive at Nabble.com. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
