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How do I uncap a collection in MongoDB?
2 Answers. No, You can convert a non-capped collection to a capped collection using the “convertToCapped” command but there’s no way to go the other way. Your only option is to clone the collection to a non capped one and rename it which obviously involves downtime.
Which of the given is a restriction in capped collection?
We can create collections in mongoDb on which we can apply size limit. These special type of collections are called Capped Collections. These are a kind of circular queues, in which if allocated size limit is reached, it makes space for new documents by overwriting the oldest documents in the collection.
What do you mean by capped collection?
Capped collections are fixed-size collections means when we create the collection, we must fix the maximum size of the collection(in bytes) and the maximum number of documents that it can store. It supports high-throughput operations, that are useful when we insert and retrieve documents based on insertion order.
What does it mean to have capped collections in MongoDB?
Capped collections are fixed-size collections means when we create the collection, we must fix the maximum size of the collection (in bytes) and the maximum number of documents that it can store. After creation, if we try to add more than documents to their capacity, it overwrites the existing documents.
What does renamecollection do to the MongoDB database?
MongoDB drops the original collection. renameCollection renames the new capped collection to the name of the original collection. This holds a database exclusive lock for the duration of the operation. Other operations which lock the same database will be blocked until the operation completes.
How does MongoDB load documents in natural order?
MongoDB traverses the documents in the original collection in natural order and loads the documents into a new capped collection.
Do you have to specify max number of documents in MongoDB?
Otherwise, MongoDB will raise the provided size to make it an integer multiple of 256. Additionally, you may also specify a maximum number of documents for the collection using the max field as in the following document: The size argument is always required, even when you specify max number of documents.