CODEWITHSUNDEEP
firebase-storagegoogle-cloud-firestore
TccHtnn
TccHtnn

Reputation: 936

Maximum size of a document in firestore?

I want create a document that containing about 20 million objects.

The structure like that:

documentID
---- key1
-------- object1
-------------name: "test1"
-------------score: 123

I don't know the limitation of a document size in firestore, so can you help me any reference or information about that? Thanks!

Upvotes: 21

Views: 33935

Answers (5)

kibugenza young king king
kibugenza young king king

Reputation: 1

i think you should try using firebase_storage instead and send the data as a json and retrieve later on as needed (downloading it, and adding more content if needed and sending the update to override the current one like that, like that), firestore has a limit of 1 mb which is something like 1 million bytes. this is something like 900k characters(on normal characters anyway, not including other languages like chinese characters and so on ,valid: A upto Z and 1-9 and symbols included) so firebase firestore can not handle 20 million characters it is not possible. but on storage it is very possible cause a json with those characters is something like less than 20 mb.

Upvotes: 0

Alex Mamo
Alex Mamo

Reputation: 138824

If you want to check the size of a document against the maximum of 1 MiB (1,048,576 bytes), there is a library that can help you with that:

In this way, you'll be able to always stay below the limit.

Upvotes: 0

Juan David Arce
Juan David Arce

Reputation: 902

If you want to save objects bigger than 1mb you should use cloud storage, the limit is 5tb per object:

There is a maximum size limit of 5 TB for individual objects stored in Cloud Storage. There is an update limit on each object of once per second, so rapid writes to a single object won't scale. Google cloud storage

Upvotes: 1

David Haddad
David Haddad

Reputation: 3926

Have you looked at Firestore sub-collections?

You can store the main item as a document in one top-level collection, and all of its underlying data could be in a sub-collection of that document.

There is no limit to how many object records a sub-collection can contain when those objects are stored as child documents of that sub-collection.

So 20M records should not be an issue.

Upvotes: 8

Dan McGrath
Dan McGrath

Reputation: 42018

The maximum size is roughly 1 Megabyte, storing such a large number of objects (maps) inside of a single document is generally a bad design (and 20 million is beyond the size limit anyway).

You should reconsider why they need to be in a document, rather than each object being their own document.

Cloud Firestore's limits are listed in the documentation.

Upvotes: 33

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