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[00:02:26] <cheeser> https://docs.mongodb.com/manual/reference/method/db.collection.findAndModify/

[00:09:29] <alexi5> impressive. thats what I needed

[00:09:35] <alexi5> thanks cheeser

[00:19:00] <cheeser> np

[03:58:13] <snmaynard> Just upgraded to mongo 3.2 with a fairly large sharded cluster. When we run rs.stepDown() on one of our primaries in the cluster the mongos clients just hang when asked for data until they are restarted. This wasnt something we saw with 3.0. Anybody got any ideas what might be causing it?

[07:30:48] <alexi5_1> Hello

[13:44:26] <jamieshepherd> I have a store on atlas, 3 node replica set, I have one collection which could get to like 20-50 million records, one that will get to like 1000

[13:44:35] <jamieshepherd> the size of one won't affect the read performance of the other one, right?

[13:44:45] <cheeser> no

[13:45:01] <jamieshepherd> I'm not coming into any problems, just want to be sure :P

[15:17:29] <hooo> hey, i am trying to use the c++ mongodb driver and i built it but the bsoncxx headers like document.hpp are not found and not copied to the install dir.. why

[21:13:52] <thibauts> Hi, I have a collection of documents, each having an array of tags and a float value. I'd like to aggregate the sum of values by unique tag (meaning each document contributes to the value sum of each of its tags). Is it possible with mongo ?

[21:54:23] <GothAlice> thibauts: $unwind on the array of tags followed by $group of tag with $sum of the float value in an aggregation query.

[22:14:23] <thibauts> GothAlice: Thanks a lot ! That's exactly what I needed ! :)

[22:14:36] <GothAlice> It never hurts to help. :)