MongoDB efficient dealing with embedded documents
- by Sebastian Nowak
I have serious trouble finding anything useful in Mongo documentation about dealing with embedded documents. Let's say I have a following schema:
{
_id: ObjectId,
...
data: [
{
_childId: ObjectId // let's use custom name so we can distinguish them
...
}
]
}
What's the most efficient way to remove everything inside data for
particular _id?
What's the most efficient way to remove embedded document with
particular _childId inside given _id? What's the performance
here, can _childId be indexed in order to achieve logarithmic (or
similar) complexity instead of linear lookup? If so, how?
What's the most efficient way to insert a lot of (let's say a 1000)
documents into data for given _id? And like above, can we get
O(n log n) or similar complexity with proper indexing?
What's the most efficient way to get the count of documents inside data for given _id?
