A BufferedStore is a store that initially writes a buffer and eventually transports data to a destination. The fact that the store is Buffered is an implementation detail and interaction with the store should be transparent to the user.

Reading from a BufferedStore

Each read can be thought of as a query of the form do you have any X?

• describe 1 is asking: do you have any data where record is 1?
• fetch "count", 1 is asking: do you have any data where key is count and record is 1?
• verify "count", 1,1 is aksing: do you have any data where key is count, value is 1 and record is 1
• etc

Each component can answer that question in 1 of 3 ways:

• Yes
• No, because it was removed
• No, because it was never added

Here is the matrix for how component responses should form an overall BufferedStore response: