问题
I can't find any definitive answer here. My IoT service needs to tollerate flaky connections. Currently, I manage a local cache myself and retry a cloud-blob transfer as often as required. Could I replace this with an Azure EventHub service? i.e. will the EventHub client (on IoT-Core) buffer events until the connection is available? If so, where is the info on this?
回答1:
It doesn't seem so according to: https://azure.microsoft.com/en-us/documentation/articles/event-hubs-programming-guide/
You are resposible for sending and caching it seems:
Send asynchronously and send at scale
You can also send events to an Event Hub asynchronously. Sending asynchronously can increase the rate at which a client is able to send events. Both the Send and SendBatch methods are available in asynchronous versions that return a Task object. While this technique can increase throughput, it can also cause the client to continue to send events even while it is being throttled by the Event Hubs service and can result in the client experiencing failures or lost messages if not properly implemented. In addition, you can use the RetryPolicy property on the client to control client retry options.
来源：https://stackoverflow.com/questions/34484744/azure-eventhub-offline-event-buffering-queueing-possible