问题
We have a C# Azure Function App (consumption plan) which scales dynamically i.e new instances are added depending on the load, now we have an object which needs to be used across all instances of this Azure Function, as the object is complex (has delegates) I cannot serialize to put on an external cache so that all instances can access it from there, please suggest the best way to handle this scenario.
回答1:
Azure Function instances are running on different servers, they do not share the same memory, so there is no way for all of them to access a single .NET object without remote calls (and thus serialization).
回答2:
There's something fundamentally contradictory in your question: you can't have both a) a function that scales to many machines; b) all instances sharing in-memory objects as if they were running on a single machine. It goes the other way too: serverless means that if nobody is using your function, all infrastructure can be shut down (hence saving you money) - but that implicitly means you'd lose your in-memory state and need to be able to serialize it.
Minimize the shared state, make it serializable (there are patterns for dealing with things like delegates [1]), and use external storage (Azure Storage, or a cache like Redis).
[1] For delegates, one trick is to maintain a dictionary of handles to delegates, and then serialize the handle. Similarly, for polymorphism, you might serialize the type name.
来源：https://stackoverflow.com/questions/46220604/how-to-share-object-state-across-all-azure-function-instances