On Thu, 2010-07-22 at 04:21 +0200, Li Li wrote: > But itshows a problem of distrubted search without common idf. > A doc will get different score in different shard.
Bingo. I really don't understand why this fundamental problem with sharding isn't mentioned more often. Every time the advice "use sharding" is given, it should be followed with a "but be aware that it will make relevance ranking unreliable". Regards, Toke Eskildsen