I have a project created with Cloud Firestore Datastore Mode.
I perform write operation using com.google.cloud.datastore.Datastore.put without transaction, just after performing write I perform read operation for the just written record using com.google.cloud.datastore.Datastore.get. But as far as I see in some cases read operation doesn't return just written value.
This looks like eventual consistency but according to this https://cloud.google.com/datastore/docs/firestore-or-datastore 'Cloud Firestore Datastore Mode' is strongly consistent database.
Is it possible that write operation isn't strong consistent if you perform it without transaction? According to this https://cloud.google.com/datastore/docs/concepts/transactions transactions are optional and I didn't find any information that they are required to make Firestore Datastore strongly consistent.
Is it required to setup something to make strong consistency work?
Because you aren’t using transactions, there is a chance that your read action will execute before your write action finishes. This could happen because of a large volume of traffic or a large write size. Using transactions will prevent this from happening because you can allow a read action to only run after a write action finishes.