There are multiple approaches for multitenancy in Mongo DB
1) Shared collection with tenantId as discriminator. 2) Collection per tenant. 3) Database per tenant. 4) Database instance per tenant.
I personally prefer third approach but I am not sure which among these can be preferable if I have many tenant. Also, which among these approach would be a great choice if I want control the impact of tenant on other, espacially, where tenants data is expected to vary a lot in volume.
