I am new to firebase firestore and searched, but could not find the limitation for the number of documents that can be handled under one collection. Can anybody help me out to know please.
firebaser here
There is no documented limit to the number of documents that can be stored in a Cloud Firestore collection. The system is designed to scale to huge data sets.
There is no limitation on the number of documents in Firestore collection but it has a limitation of the size of the document.
The maximum size of a document is roughly 1 MiB (1,048,576 bytes).
There are many more limits that are listed in the below link.
Limits of firestore
There is no document limit under one collection
Official documentation for clearness: Click here
But there is limitation in maximum depth of subcollections
there is no limits in documents as #Frank saids, however to answer the question from #Tri, there is a limit of number of sub collections (100) that means collection inside collection
Related
I'm having this problem when trying to register a user on the database. The database template is a document specific to the registered user in which it has 3 arrays of objects.
I searched on the internet a little bit about it, and people seemed to say that creating a subcollection would solve it, but I don't get how it would solve the problem nor avoid it happening again in the future when theses arrays grow bigger since the subcollections are also limited by 1MB of size limit, or even needing to make multiple fetchs instead of only one if I understood it correctly.
I believed firestore was a database. Isn't it one? How can't I store data in a database then, being so limited? What's the logic behind Firestore for doing that?
And if so, how do I get around it so it never happens again?
The size limit of 1MB applies to each individual document. Subcollections are not part of it.
Also see:
Are Cloud Firestore subcollections included in document size calculation
Does 1 mb size limit apply to a sub collection in inside a document in Firestore?
Does the size of subcollections included while calculating the document size and add to the limit of 1MB?
I saw on the Firebase Firestore documentation that the limits for the "Maximum depth of subcollections" is 100.
Does this refer to the number of sub-collections that one collection can have in total? Like /collection/document/sub1/document, /collection/document/sub2/document all the way up to /collection/document/sub100/document?
Or does this refer to it in the way that would make the file path longer? For instance: /collection/document/sub1/document/sub2/document/.../sub100/document?
Does this refer to the number of sub-collections that one collection can have in total?
No, it does not refer to the number of sub-collections that one collection can have in total, it refers to the number of subcollections that you can add in-depth, which is up to 100.
Or does this refer to it in the way that would make the file path longer? For instance: /collection/document/sub1/document/sub2/document/.../sub100/document?
Yes, that's the correct approach.
Please also note, that Firestore is as fast as it is at level 1 is also at level 100.
I have watched videos about Firestore on YouTube. It is said that there is a limitation for a where which the max size is 1 Mb and also maximum 1 write per second.
How about the query to a collection? Is there a limitation for this? Because I will heavily rely on a parent collections to perform different queries for a lot of users. That's why I need to know the worst case scenario. I need to know if there are any limitations.
I mean something like, maximum number of query per second, max concurrent queries? Maximum number to get data from a collection in a second ? Do such limitations exis for querying a collection?
I have tried to read the documentation from here and it seems there is no limitation for query in a collection. I need to make sure, maybe there is documentation that I have not read yet?
There is no documented limit to the number of queries you can execute against Firestore. While there is probably a physical limit, you're extremely unlikely to hit it before running into any of the documented limits (such as the 1 million concurrent users).
In other words: it is quite unlikely you'll need to worry about the read scalability or limitations of Firestore for your application. It is made to scale very well on read operations, which is precisely the reasons why it supports a more limited set of functionality, and why it has a write throughput limit on individual documents.
Firestore scales massively for read operations. When using the Blaze payment plan, there are no fundamental read limits like there are for write limits. You just need to be willing to pay for all those documents reads, and the bandwidth required for all that data. Please read the pricing page about billing.
There is limit for Your reads and writes.
They have provided in their document where in Free service you have limited read writes.
Each read will be counted in normal queries it acts same with writing document
The article about Best practices for Cloud Firestore states that we should keep the rate of write operations for an individual collection under 1,000 operations/second.
But at the same time, the Firebase team says in Choose a data structure that root-level collections "offer the most flexibility and scalability".
What if I have a root-level collection (e.g. "messages") which expects to have more than 1,000 write operations/second?
If you think at that limitation of 1,000 operations/second it's pretty much but if you find your self in a situation in which you need more than that, then you should consider changing your database schema to allow writes on multiple collections. So you should multiply the number of collections. Having a single collection of messages, in which every user can add messages doesn't sound as a good way to go since you can reach that limitation very soon. In this case you should split that collection into multiple other collections. A possible schema might be the one I have explained in the following video:
https://www.youtube.com/watch?v=u3KwKQddPoo
See, at the end of that video, there is collection named messages which in term contains a roomId document. This document contains a subcollection named roomMessages which contains as documents all messages from a chat room. In this case, there are no chances you can reach that limitation.
But at the same time, the Firebase team says in Choose a data structure that root-level collections "offer the most flexibility and scalability".
But also rememeber, Firestore can as quickly look up a collection at level 1 as it can at level 100, so you don't need to worry about that.
The limit of 1,000 ops/sec per collection only apply to realtime update, so as long as you don't have a snapshot listener this should be okay.
I asked the question on the Cloud Firestore Google Groups
The limit is 10,000 writes per second if no other limits apply first:
https://firebase.google.com/docs/firestore/quotas#writes_and_transactions
Also just keep in mind the best practices for scaling cloud firestore
I've seen this post which explains there is no limit to the documents in a collection (which I understood was the case for scalability), however, is there a documented limit on collections?
My app will be multi-tenant with collections like tenandId_collectionName so I don't want to hit a limit as users grow.
The Firebase Limits does not state any limits on collections, but there is a limit on the depth of sub-collections. The limit is that you can only go 100 subcollections deep, which is very large and you should never reach that point unless you have the most detailed and specific app in the world.
So to summarize, there are no limits on how many collections you have, just how deep you can go within a collection.
Hope this helps!