Hi Erick, I plan to use the composite-id routing. And I can use the same routing part of the key to determine the shard number in ADDREPLICA command (using the route parameter). I think this solution will work for me.
Thanks Nawab On Sat, Jun 29, 2019 at 8:55 AM Erick Erickson <erickerick...@gmail.com> wrote: > What’s your basis for thinking that some shard will get more queries? > Unless you’re using implicit routing, you really have no control over > either where docs end up or thus where queries go. > > If you do somehow know some shards get more queries, one strategy is to > simply have more _replicas_ for those shards with the ADDREPLICA > collections API command. > > > > On Jun 29, 2019, at 7:00 AM, Shawn Heisey <apa...@elyograg.org> wrote: > > > > On 6/29/2019 12:23 AM, Nawab Zada Asad Iqbal wrote: > >> is it possible to specify different number of replicas for different > >> shards? i.e if I expect some shard to get more queries , i can add more > >> replicas to that shard alone, instead of adding replicas for all the > >> shards. > > > > On initial collection creation, I don't think that is possible -- the > number of replicas requested will apply to every shard. But you can add > and remove replicas on shards after collection creation, so this is > achievable. > > > > Thanks, > > Shawn > >
