In your case, since there is no co-current queries, adding replicas won't help much on improving the response speed. However, break your index into a few shards do help increase query performance. I recently break an index with 30 million documents (30G) into 4 shards, and the boost is pretty impressive (roughly 2-5x faster for a complicated query)
Ming On Mon, Jan 28, 2013 at 10:54 AM, Isaac Hebsh <isaac.he...@gmail.com> wrote: > Does adding replicas (on additional servers) help to improve search > performance? > > It is known that each query goes to all the shards. It's clear that if we > have massive load, then multiple cores serving the same shard are very > useful. > > But what happens if I'll never have concurrent queries (one query is in the > system at any time), but I want these single queries to return faster. Is a > bigger replication factor will contribute? > > Especially, Will a complicated query (with a large amount of queried > fields) go to multiple cores *of the same shard*? (E.g. core1 searching for > term1 in field1, and core2 searching for term 2 in field2) > > And what about a query on a single field, which contains a lot of terms? > > Thanks in advance.. >
