Best practice to have persistence in OPC UA Server

[francescobianca]

Hi everyone,

I have my OPCUA server where at startup I do the xml import with the semantic model and then load the various nodes via a json file. I would like to know what are the best practices to keep the semantic model updated (for example if via api I add a node I want to know how to make a persistent backup). Maybe through this library there is already something supported (I don't know a mongodb, a sql etc.)

[AndreasHeine]

if you want to persist nodes which have been created while runtime, you need to export them to XML!? or as shelffile!
but after re-import you need to link them logically if they have some behavior attached.

opcua-asyncio/asyncua/server/server.py

Line 587 in c75f45d

async def export_xml(self, nodes, path):

opcua-asyncio/asyncua/server/server.py

Line 595 in c75f45d

async def export_xml_by_ns(self, path: str, namespaces: list = None):

opcua-asyncio/asyncua/server/server.py

Line 107 in c75f45d

async def init(self, shelf_file=None):