Address Verification updates the contents of
FileSetsInfo.json
to reflect that the new file set is being prepared:
{ "FileSetAState": "InUse", "FileSetBState": "PreparingForUse" }
Address Verification starts a new batch of function servers and preloads the reference data files in the
FileSetB
directory for the servers. During this time, the function servers that use
FileSetA
remain fully available for all jobs.
When all new function servers have started successfully, the previous function servers are shut down.
The contents of
FileSetsInfo.json
are updated to reflect that
FileSetB
is now in use and
FileSetA
has been unloaded:
{ "FileSetAState": "Unused", "FileSetBState": "InUse" }

As starting a new batch of function servers is akin to a regular initialization procedure, Address Verification writes messages logged during this sub-initialization to the initialization log. However, any error that prevents the hot swap from starting is written to the Address Verification error log.

After a successful hot swap, the reference data files that the operation unloaded are unlocked on the file system and can be moved or deleted again.