$bucket vs $group

[steevej (Steeve Juneau)]

Dear @Prof_Monika_Shah,

please followup on this thread and your other one at

When to use $bucket or $bucketauto

What I understood is $bucket is useful when embedding 1:S (squillion) relationship exist between two entities or 1:M but document size is much more. Bucketing also help to improve performance of referring specific buckets only. When is it preferred to use $bucket or $bucketauto or $facet? For example, there is an application, which add following sensor records at every 5 minutes: {sensor_id : <> , sensor_name:< >, location : <>, timestamp : <>, value:<>} OR {sensor_id : <> , sensor_name:< …

Marking one post as the solution will provide confidence to the other users that it makes sense as they might have the same questioning.

Followup questions for clarification is also a good way to keep the forum useful.

Thanks

~~/)~~