#mongoDB #course #tutorial
db.createCollection("teachers", {capped : true , size : 1000 * 1024, max : 100}, {autoIndexId:false})
capped = Enables a capped collection. Oldest entries are overwritten when the collection reaches its max size.
size = specifies the maximum size in bytes (x * y bytes)
max = maximum number of documents allowed
autoIndexId = Creates an index on _id field
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